Not sure if any of you guys have seen this. According to the poster, it's 2.25" in diameter so smaller than a 2-B dial at 2.5" but maybe someone recognizes it here and could use it.
Thanks,
Barry - N4BUQ
|
Re: Drake 1-A output transformer?
Thanks, Peter. I¡¯m not sure that I had all of this early one.?
I¡¯ll be getting back to the 1-A after I finish the 2-AB¡¯s, then a TR7 mystery and a driver issue with the TR-4Cw RIT.?
I¡¯m busier now than I ever was.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Thu, May 11, 2023 at 12:42, VE7PS < ve7ps@...> wrote: Steve/Chris;
See attached schematics. May help if you don't already have these.
The transition was at serial #453.
I think mine is #456 or something like that - just after the change was made.
73 Peter VE7PS
On Thu, May 11, 2023 at 5:58?AM Steve Wedge, W1ES/4 via <w1es= [email protected]> wrote: Chris, the output transformer is a generic part that was very common in the days when this receiver was made. The 6AQ5 was very commonly used as an audio output amp and Drake used a fairly standard circuit. I replaced the transformer in mine and bought the part for something like $10 on eBay.
I have been struggling, off and on, with a 1-A for the past couple of years. I have an intermittent problem that I believe is inside the low pass filter in the audio chain but I haven't mustered up the guts to take it out and go inside. Good luck with yours and I hope that it's from '58 because the only existing schematics seem to be for serial numbers after around 386. Mine is 331 (I think) and there are definite differences.
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, May 11th, 2023 at 7:51 AM, Chris Farley via <vacuuminded2= [email protected]> wrote:
Hi all,
I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed. Tall order but has anybody an un-saveable parts unit for this transformer or the whole speaker/transformer assembly?
Regards,
|
Re: Drake 1-A output transformer?
I can check later. I am pretty sure that the one that came with it was original (and it turned out to not be bad). It¡¯s pretty small, as audio output xformers go.?
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Thu, May 11, 2023 at 12:33, Chris Farley via groups.io < vacuuminded2@...> wrote: Hi Steve, thanks for the info.? Do you happen to know what the original maker/PN might be?? I don't have an original to reference.??
This one is SN 861.??
Regards,? Chris kc9ieq On Thu, May 11, 2023 at 7:58 AM, Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote: Chris, the output transformer is a generic part that was very common in the days when this receiver was made.? The 6AQ5 was very commonly used as an audio output amp and Drake used a fairly standard circuit.? I replaced the transformer in mine and bought the part for something like $10 on eBay.
I have been struggling, off and on, with a 1-A for the past couple of years.? I have an intermittent problem that I believe is inside the low pass filter in the audio chain but I haven't mustered up the guts to take it out and go inside.? Good luck with yours and I hope that it's from '58 because the only existing schematics seem to be for serial numbers after around 386.? Mine is 331 (I think) and there are definite differences.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, May 11th, 2023 at 7:51 AM, Chris Farley via groups.io <vacuuminded2@...> wrote:
Hi all,?
I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed.? Tall order but has anybody an un-saveable parts unit for this transformer or the whole speaker/transformer assembly???
Regards,?
|
Re: 2-B 50kHz Alignment Question
There are a lot of function generators on ebay for under $ 100 that start at almost zero Hz and go to 5 to 25 MHz depending on the price.? They are not shielded so that may be a problem.
One just has to remember there is no difference in one rated for audio or RF as a generator is a generator.
Ralph ku4pt
On Thursday, May 11, 2023 at 11:21:03 AM EDT, VE7PS <ve7ps@...> wrote:
Steve:
I agree with you....but a lot of us OT's are using HP 8640B's as our "go-to" signal gennie?and it's great at 455 Khz, but won't do 50 Khz.? Wonder what you are using Steve?
My solution turned out to be already in the shack.? The HP 3336B is a synthesized?SG that?can be found quite easily and for relatively?few $$$ at fleamarkets.? I paid just over 100 Canuckbucks for my 1st one and was later given?a 2nd one that?was passed on to a young ham here a couple of years ago.? The 3336 series only covers to 20 Mhz out its front connector, but will go to 60 Mhz out its rear.? It's often found quite cheap because of that, as well as the fact that it's a 75 ohm output with rare WECO connectors.? Interestingly, you can easily switch it to 50 ohm internally, and use a small aluminum plate to change the output connector to something more useful like a BNC or SMA. Adapters are around for those WECO? connectors, but are hard to find.? The HP 3336C is a 50 ohm version, but I've never seen one and suspect they are not often available.
Here's a helpful video on that conversion;
?
I suppose there are plenty of cheap SG's now out of China too these days, but so far haven't looked into that option.
73 Peter VE7PS
|
Re: Drake 1-A output transformer?
Steve/Chris;
See attached schematics.? May help if you don't already have these.
The transition was at serial #453.
I think mine is #456 or something like that - just after the change was made.
73 Peter VE7PS
On Thu, May 11, 2023 at 5:58?AM Steve Wedge, W1ES/4 via <w1es= [email protected]> wrote: Chris, the output transformer is a generic part that was very common in the days when this receiver was made.? The 6AQ5 was very commonly used as an audio output amp and Drake used a fairly standard circuit.? I replaced the transformer in mine and bought the part for something like $10 on eBay.
I have been struggling, off and on, with a 1-A for the past couple of years.? I have an intermittent problem that I believe is inside the low pass filter in the audio chain but I haven't mustered up the guts to take it out and go inside.? Good luck with yours and I hope that it's from '58 because the only existing schematics seem to be for serial numbers after around 386.? Mine is 331 (I think) and there are definite differences.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, May 11th, 2023 at 7:51 AM, Chris Farley via <vacuuminded2= [email protected]> wrote:
Hi all,?
I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed.? Tall order but has anybody an un-saveable parts unit for this transformer or the whole speaker/transformer assembly???
Regards,?
|
Re: Drake 1-A output transformer?
Hi Steve, thanks for the info.? Do you happen to know what the original maker/PN might be?? I don't have an original to reference.??
This one is SN 861.??
Regards,?
On Thu, May 11, 2023 at 7:58 AM, Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote: Chris, the output transformer is a generic part that was very common in the days when this receiver was made.? The 6AQ5 was very commonly used as an audio output amp and Drake used a fairly standard circuit.? I replaced the transformer in mine and bought the part for something like $10 on eBay.
I have been struggling, off and on, with a 1-A for the past couple of years.? I have an intermittent problem that I believe is inside the low pass filter in the audio chain but I haven't mustered up the guts to take it out and go inside.? Good luck with yours and I hope that it's from '58 because the only existing schematics seem to be for serial numbers after around 386.? Mine is 331 (I think) and there are definite differences.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, May 11th, 2023 at 7:51 AM, Chris Farley via groups.io <vacuuminded2@...> wrote:
Hi all,?
I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed.? Tall order but has anybody an un-saveable parts unit for this transformer or the whole speaker/transformer assembly???
Regards,?
|
Re: 2-B 50kHz Alignment Question
The biggest part of the problem with my setup using the HP-8640B/HP-11710B was my brain.? I was going on memory as to what the proper input frequency to the down-converter should be and that was completely incorrect.? That, and I was doing the down-conversion math incorrectly as well.? I briefed myself on the down-converter's specs and now can hear a nice, clean 100kHz signal in my Satellit 800 and I'm sure I'd be able to use this setup for the 50kHz 2-B alignment as well.? I may have to pull the 2-B back apart just to prove that to myself.
Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: 2-B 50kHz Alignment Question
Steve:
I agree with you....but a lot of us OT's are using HP 8640B's as our "go-to" signal gennie?and it's great at 455 Khz, but won't do 50 Khz.? Wonder what you are using Steve?
My solution turned out to be already in the shack.? The HP 3336B is a synthesized?SG that?can be found quite easily and for relatively?few $$$ at fleamarkets.? I paid just over 100 Canuckbucks for my 1st one and was later given?a 2nd one that?was passed on to a young ham here a couple of years ago.? The 3336 series only covers to 20 Mhz out its front connector, but will go to 60 Mhz out its rear.? It's often found quite cheap because of that, as well as the fact that it's a 75 ohm output with rare WECO connectors.? Interestingly, you can easily switch it to 50 ohm internally, and use a small aluminum plate to change the output connector to something more useful like a BNC or SMA. Adapters are around for those WECO? connectors, but are hard to find.? The HP 3336C is a 50 ohm version, but I've never seen one and suspect they are not often available.
Here's a helpful video on that conversion;
?
I suppose there are plenty of cheap SG's now out of China too these days, but so far haven't looked into that option.
73 Peter VE7PS
On Thu, May 11, 2023 at 6:02?AM Steve Wedge, W1ES/4 via <w1es= [email protected]> wrote: I have found the simplest way is to just use a signal generator and zero beat.? Both of my 2-Bs needed minor adjustment, which is not unexpected after 60+ years.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Wednesday, May 10th, 2023 at 10:07 PM, wb6ogd < garywinblad@...> wrote:
Remember it¡¯s radio.If you have another receiver you can just listen? for the signals with an antenna wire draping? over the oscillator sections. I use my TS-440s that goes down to 30KHz (IIRC).? But you can listen for harmonics too. 73, Gary? WB6OGD? On May 10, 2023, at 4:11 PM, Dan <pitfit@...> wrote:
? ?Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun!
Dan WB4GRA On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
? I had one of those about 12 years ago.? I should've kept it.
Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan WB4 GRA On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that. Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via " <w1es=[email protected]>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: 2-B 50kHz Alignment Question
I have found the simplest way is to just use a signal generator and zero beat.? Both of my 2-Bs needed minor adjustment, which is not unexpected after 60+ years.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Wednesday, May 10th, 2023 at 10:07 PM, wb6ogd <garywinblad@...> wrote:
Remember it¡¯s radio.If you have another receiver you can just listen? for the signals with an antenna wire draping? over the oscillator sections. I use my TS-440s that goes down to 30KHz (IIRC). ?But you can listen for harmonics too. 73, Gary? WB6OGD? On May 10, 2023, at 4:11 PM, Dan <pitfit@...> wrote:
? ?Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun!
Dan WB4GRA On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
? I had one of those about 12 years ago.? I should've kept it.
Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan WB4 GRA On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that. Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: Drake 1-A output transformer?
Chris, the output transformer is a generic part that was very common in the days when this receiver was made.? The 6AQ5 was very commonly used as an audio output amp and Drake used a fairly standard circuit.? I replaced the transformer in mine and bought the part for something like $10 on eBay.
I have been struggling, off and on, with a 1-A for the past couple of years.? I have an intermittent problem that I believe is inside the low pass filter in the audio chain but I haven't mustered up the guts to take it out and go inside.? Good luck with yours and I hope that it's from '58 because the only existing schematics seem to be for serial numbers after around 386.? Mine is 331 (I think) and there are definite differences.
73,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Thursday, May 11th, 2023 at 7:51 AM, Chris Farley via groups.io <vacuuminded2@...> wrote:
Hi all,?
I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed.? Tall order but has anybody an un-saveable parts unit for this transformer or the whole speaker/transformer assembly???
Regards,?
|
Drake 1-A output transformer?
Hi all,?
I just picked up a bucket list 1A which seems to fundamentally work, however the output transformer appears to be a much later replacement AND has failed.? Tall order but has anybody an un-saveable parts unit for this transformer or the whole speaker/transformer assembly???
Regards,?
|
Re: 2-B 50kHz Alignment Question
Barry,
By golley, you are right, the TS-440s only goes down to 100KHz!? I could have sworn it could
go lower.? Well, you can hear maybe the 2nd but for sure the 3rd harmonic of the BFO.
?
If you haven't used your 440 in a long time, do it, it is a great rig.. Be sure to join the group if
you need any help with it.
73,
Gary
WB6OGD
?
On 05/10/2023 7:31 PM PDT n4buq <n4buq@...> wrote:
?
?
I have a TS-440S/AT that I haven't powered up in a long time.? I need to get it out and play with it.? From what I see on the web, those only go down to 150kHz(?).
?
I also have a Grundig Satellit 800 and a Drake R8A, both of which go down to 100kHz so I might be able to hear the first harmonic.
?
With all the equipment I've garnered over the years, I should be able to hear/measure just about anything the 2B (R4-B, R-390,etc.) uses.
?
Thanks,
Barry - N4BUQ
?
From: "GARY WINBLAD" <garywinblad@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Wednesday, May 10, 2023 9:07:06 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Remember it¡¯s radio.
If you have another receiver you can just listen?
for the signals with an antenna wire draping?
over the oscillator sections.
I use my TS-440s that goes down to 30KHz
(IIRC). ?But you can listen for harmonics too.
73,
Gary?
WB6OGD?
?
On May 10, 2023, at 4:11 PM, Dan <pitfit@...> wrote:
Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun!
Dan
WB4GRA
?
On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
I had one of those about 12 years ago.? I should've kept it.
Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan
WB4 GRA
?
On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that.
Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel.
While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough".
Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now.
The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that.
Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
?
?
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote:
Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: 2-B 50kHz Alignment Question
I have a TS-440S/AT that I haven't powered up in a long time.? I need to get it out and play with it.? From what I see on the web, those only go down to 150kHz(?).
I also have a Grundig Satellit 800 and a Drake R8A, both of which go down to 100kHz so I might be able to hear the first harmonic.
With all the equipment I've garnered over the years, I should be able to hear/measure just about anything the 2B (R4-B, R-390,etc.) uses.
Thanks,
Barry - N4BUQ
From: "GARY WINBLAD" <garywinblad@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Wednesday, May 10, 2023 9:07:06 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Remember it¡¯s radio.If you have another receiver you can just listen? for the signals with an antenna wire draping? over the oscillator sections. I use my TS-440s that goes down to 30KHz (IIRC). ?But you can listen for harmonics too. 73, Gary? WB6OGD? On May 10, 2023, at 4:11 PM, Dan <pitfit@...> wrote:
Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun! Dan WB4GRA On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
I had one of those about 12 years ago.? I should've kept it. Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan WB4 GRA On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that. Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: 2-B 50kHz Alignment Question
Remember it¡¯s radio. If you have another receiver you can just listen? for the signals with an antenna wire draping? over the oscillator sections. I use my TS-440s that goes down to 30KHz (IIRC). ?But you can listen for harmonics too. 73, Gary? WB6OGD?
toggle quoted message
Show quoted text
On May 10, 2023, at 4:11 PM, Dan <pitfit@...> wrote:
? ? Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun!
Dan WB4GRA On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
? I had one of those about 12 years ago.? I should've kept it.
Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan WB4 GRA On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that. Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: 2-B 50kHz Alignment Question
I was thinking of checking the oscillator with my counter by using a coil around the oscillator tube.? I have a working plugin for my Tektronix 7000-series scopes and that could probably work but nothing quite like a built-in counter.
Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Wednesday, May 10, 2023 6:11:26 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun! Dan WB4GRA On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
I had one of those about 12 years ago.? I should've kept it. Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan WB4 GRA On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that. Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: 2-B 50kHz Alignment Question
? Actually, you can set the 405 KHz and 50 KHz oscillators with a scope with a frequency counter feature. A 10X probe doesn't seem to load it down enough to disallow this method. I tend to do it both ways - use an sig gen and zero beat to start and and then double check it with a scope/counter - just for fun!
Dan
toggle quoted message
Show quoted text
On May 9, 2023, at 9:37 PM, n4buq <n4buq@...> wrote:
? I had one of those about 12 years ago.? I should've kept it.
Thanks,
Barry - N4BUQ
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 8:35:09 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
The Drake 50 KHz IF is the only reason I keep my venerable HP-606A around. Not often used but rock-steady and reliable the rare times I need it.
Dan WB4 GRA On May 9, 2023, at 9:25 PM, n4buq <n4buq@...> wrote:
Now that I think about it, I should have rewritten the FS-4A code to generate the alignment signals.? Easy enough and I may still do that. Thanks,
Barry - N4BUQ
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 3:45:49 PM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Apparently this was in my setup.? I was using an HP-8640B signal generator with an HP-11710B down converter to get me to 50kHz.? That was somewhat "touchy" so I switched to my HP-3310B function generator with an HP-5384A counter.? That worked a lot better and I can get a zero-beat at/near the center of the slug's travel. While the HP-3310B is not nearly as stable as the HP-8640B, I think that got me "good enough". Thanks,
Barry - N4BUQ
From: "Barry" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 9:21:23 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Cranking up the output of the generator helped and I can hear it better on any/all band settings (was only hearing it well on one of the AUX positions but can hear it now regardless of the bandswitch which makes better sense). Also, moving the VFO doesn't affect the zero-beat now. The problem I'm having now, though, is that I cannot zero-beat a 50.000kHz signal by adjusting T7's slug.? It is quite a bit off frequency and not sure what would cause that. Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 6:54:54 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Make sure that you have it on the right pin. I used about a 1V signal and had no trouble.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Mon, May 8, 2023 at 23:53, n4buq <n4buq@...> wrote: Following the manual, with the BFO and PRODUCT DETECTOR on, I've connected a 50kHz unmodulated signal through a blocking capacitor to V5, Pin 1. While I can hear the signal, if I turn the tuning knob, it changes the zero-beat and that doesn't seem correct to me.
The manual doesn't give any "initial settings" for the alignment so I'm curious how one is to zero beat that oscillator. Is there something wrong with my 2-B such that tuning the VFO changes the zero-beat for this step? If not, I'm unclear how to go about this adjustment and am asking for any advice regarding that.
Thanks,
Barry - N4BUQ
|
Re: FS - TR-7 parts radios
I haven't heard back from you on my interest
Marty
KL7AM
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----- Original Message ----- From: George Maier via groups.io <georgew1lsb@...> To: [email protected]Sent: Mon, 08 May 2023 16:37:34 -0400 (EDT) Subject: [DRAKE-RADIO] FS - TR-7 parts radios I have two TR-7 parts radios for sale. S/N 2794 is complete but inoperative; some previous owner unsuccessfully attempted repairs. It is missing a few knobs and also needs a serious cleaning.? S/N 8939 is quite clean but missing the following boards: digital display, NB bypass or NB, PBT, PA module. Photos are available.? Asking $150 each or both for $250 plus shipping. Thanks for looking & 73, George - W1LSB
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Re: Birdies on Drake 2-B?
I¡¯ve noticed lots of birdies but haven¡¯t haven¡¯t logged frequencies.?
Considering the simplicity of the receiver, I¡¯m not shocked.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Wed, May 10, 2023 at 09:36, n4buq < n4buq@...> wrote: Are there known birdies on the 2-B? I have them on mine (one really significant one) and wondered if that was expected. I doubt it's normal but thought I'd ask.
Thanks,
Barry - N4BUQ
|
Are there known birdies on the 2-B? I have them on mine (one really significant one) and wondered if that was expected. I doubt it's normal but thought I'd ask.
Thanks,
Barry - N4BUQ
|
combined pricing for FS: MN-2000 and SB-200
Fellow Drake Enthusiasts,
To answer a question that was posed, ?yes, there would be a discount for a combined purchase of both items. ?$800 would take them both.
For those that attend, I hope Hamvention will be even more fun than expected!
73,
|
Gary WB6OGD