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
toggle quoted message
Show quoted text
----- 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
|
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,
|
Re: 2-B 50kHz Alignment Question
Great idea!? Let us know how it works out.
73,
Gary
WB6OGD
?
On 05/09/2023 6:25 PM PDT 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
toggle quoted message
Show quoted text
From: "K8CCA" <echapm4@...> To: "DRAKE-RADIO" < [email protected]> Sent: Tuesday, May 9, 2023 4:40:22 PM Subject: Re: [DRAKE-RADIO] FS - TR-7 parts radios
Are you going to Dayton?? 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
|
Re: 2-B 50kHz Alignment Question
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
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
toggle quoted message
Show quoted text
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
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
Are you going to Dayton??
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: 2-B 50kHz Alignment Question
Great news, Barry. I have my No. 2 receiver ready for the wash. ?Everything is stripped off and waiting. My XYL needed the oven today, so I¡¯ll wait til tomorrow. No. 3 receiver has been aligned and is waiting.
This receiver needed some touch-up for both the 50 and 405 kHz oscillators. The other alignment settings were very close.?
I check equipment and align before washing. ?I know that they went in good.
All I used for the 50 and 405 alignments was one of those cheap Chinese 60 MHz generator/counters. I¡¯ve verified their output against a Fluke counter.?
73,
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
Sent from Proton Mail for iOS
On Tue, May 9, 2023 at 4:45 PM, n4buq < n4buq@...> wrote: 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
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 2-B Tuning Shaft Bent???
On 2023-05-09 12:41, n4buq wrote: Back in the day when I worked in the toolroom, if I were to turn that
part, I would want to do it on a lathe with a good collet chuck, a
center-drilled hole in the end of the shaft, and a live center to
support it. That 0.110" diameter in the middle of the shaft would
worry me. I'm not saying it's not possible but, in my opinion, it
would be a better setup. *** I would use the live center and a steady rest. Put the steady rest right next to the short area to be turned down. As for the driven end, I'd just chuck it in my self-centering 3-jaw chuck - it doesn't need to be THAT precise; we're not talking an engine part turning thousands of RPMs. Mainly, I'd chuck the driven end deep enough so the area to be turned would be right between the steady rest and the chuck jaws. - Jerry, KF6VB Thanks,
Barry - N4BUQ
----- Original Message -----
From: "jerry-KF6VB" <jerry@...>
To: "DRAKE-RADIO" <[email protected]>
Cc: "Dan" <pitfit@...>
Sent: Tuesday, May 9, 2023 2:32:08 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? On 2023-05-09 12:24, Dan wrote:
You know, the shaft itself is common enough 1/4"/.250 stock. The
machined waist around which the dial string is wrapped, is turned down
to ~.11 inch.
Seems I could remove my current shaft and take it in to a local
machine shop and just have it duplicated.
How no idea what that would cost. Couldn't be much. A few minutes on a
lathe? I wonder.
If you bought a lathe, it would be a good beginner project. A cheap
Sieg lathe would do fine. Harbor freight sells 'em.
Back in the 80's, I broke my beloved Mini-Quad. Needed a special
brass
ring. Bought a Sherline lathe to make me a new one. Still have it.
- Jerry, KF6VB
Dan
WB4GRA
On May 9, 2023, at 2:22 PM, n4buq <n4buq@...> wrote:
?I meant "much less likely to break."
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:19:41 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I guess I was thinking of case hardened which would be much likely to
break if
bent.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Michael McCarthy" <lists@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:03:57 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I have two good 2B's and a parts unit. Only the parts unit is bent
but
that was the result of being dropped hard (which is why it's for
parts).
If the shaft was hardened it would probably shatter or shear off if
bent. Could the tension of the dial string cause a bend if it sat
for a
very long time without being used?
Mike, W1NR
On 5/9/2023 1:45 PM, n4buq wrote:
Seems like a part that might be made on a small engine lathe. Not
sure
if that shaft is hardened and/or ground but maybe not.
Thanks,
Barry - N4BUQ
|
Re: Drake 2-B Tuning Shaft Bent???
Back in the day when I worked in the toolroom, if I were to turn that part, I would want to do it on a lathe with a good collet chuck, a center-drilled hole in the end of the shaft, and a live center to support it. That 0.110" diameter in the middle of the shaft would worry me. I'm not saying it's not possible but, in my opinion, it would be a better setup.
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "jerry-KF6VB" <jerry@...>
To: "DRAKE-RADIO" <[email protected]>
Cc: "Dan" <pitfit@...>
Sent: Tuesday, May 9, 2023 2:32:08 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? On 2023-05-09 12:24, Dan wrote:
You know, the shaft itself is common enough 1/4"/.250 stock. The
machined waist around which the dial string is wrapped, is turned down
to ~.11 inch.
Seems I could remove my current shaft and take it in to a local
machine shop and just have it duplicated.
How no idea what that would cost. Couldn't be much. A few minutes on a
lathe? I wonder.
If you bought a lathe, it would be a good beginner project. A cheap
Sieg lathe would do fine. Harbor freight sells 'em.
Back in the 80's, I broke my beloved Mini-Quad. Needed a special
brass
ring. Bought a Sherline lathe to make me a new one. Still have it.
- Jerry, KF6VB
Dan
WB4GRA
On May 9, 2023, at 2:22 PM, n4buq <n4buq@...> wrote:
?I meant "much less likely to break."
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:19:41 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I guess I was thinking of case hardened which would be much likely to
break if
bent.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Michael McCarthy" <lists@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:03:57 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I have two good 2B's and a parts unit. Only the parts unit is bent
but
that was the result of being dropped hard (which is why it's for
parts).
If the shaft was hardened it would probably shatter or shear off if
bent. Could the tension of the dial string cause a bend if it sat
for a
very long time without being used?
Mike, W1NR
On 5/9/2023 1:45 PM, n4buq wrote:
Seems like a part that might be made on a small engine lathe. Not
sure
if that shaft is hardened and/or ground but maybe not.
Thanks,
Barry - N4BUQ
|
Re: Drake 2-B Tuning Shaft Bent???
On 2023-05-09 12:24, Dan wrote: You know, the shaft itself is common enough 1/4"/.250 stock. The
machined waist around which the dial string is wrapped, is turned down
to ~.11 inch.
Seems I could remove my current shaft and take it in to a local
machine shop and just have it duplicated.
How no idea what that would cost. Couldn't be much. A few minutes on a
lathe? I wonder.
If you bought a lathe, it would be a good beginner project. A cheap Sieg lathe would do fine. Harbor freight sells 'em. Back in the 80's, I broke my beloved Mini-Quad. Needed a special brass ring. Bought a Sherline lathe to make me a new one. Still have it. - Jerry, KF6VB Dan
WB4GRA
On May 9, 2023, at 2:22 PM, n4buq <n4buq@...> wrote:
?I meant "much less likely to break."
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:19:41 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I guess I was thinking of case hardened which would be much likely to break if
bent.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Michael McCarthy" <lists@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:03:57 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I have two good 2B's and a parts unit. Only the parts unit is bent but
that was the result of being dropped hard (which is why it's for parts).
If the shaft was hardened it would probably shatter or shear off if
bent. Could the tension of the dial string cause a bend if it sat for a
very long time without being used?
Mike, W1NR
On 5/9/2023 1:45 PM, n4buq wrote:
Seems like a part that might be made on a small engine lathe. Not sure
if that shaft is hardened and/or ground but maybe not.
Thanks,
Barry - N4BUQ
|
Re: Drake 2-B Tuning Shaft Bent???
You know, the shaft itself is common enough 1/4"/.250 stock. The machined waist around which the dial string is wrapped, is turned down to ~.11 inch.
Seems I could remove my current shaft and take it in to a local machine shop and just have it duplicated.
How no idea what that would cost. Couldn't be much. A few minutes on a lathe? I wonder.
Dan
WB4GRA
toggle quoted message
Show quoted text
On May 9, 2023, at 2:22 PM, n4buq <n4buq@...> wrote:
?I meant "much less likely to break."
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "n4buq" <n4buq@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:19:41 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I guess I was thinking of case hardened which would be much likely to break if
bent.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Michael McCarthy" <lists@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 1:03:57 PM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent??? I have two good 2B's and a parts unit. Only the parts unit is bent but
that was the result of being dropped hard (which is why it's for parts).
If the shaft was hardened it would probably shatter or shear off if
bent. Could the tension of the dial string cause a bend if it sat for a
very long time without being used?
Mike, W1NR
On 5/9/2023 1:45 PM, n4buq wrote:
Seems like a part that might be made on a small engine lathe. Not sure
if that shaft is hardened and/or ground but maybe not.
Thanks,
Barry - N4BUQ
|
Gary WB6OGD
K8CCA