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
|
Re: FS - TR-7 parts radios
George,
I hope you saw my email with interest in the TR-7 equipment.
Marty KL7AM
From: "George Maier via groups.io" <georgew1lsb@...> To: "DRAKE-RADIO" < [email protected]> Sent: Monday, May 8, 2023 12:37:34 PM 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
|
I would think an external magnet would affect the accuracy of the meter since it changes the field that the coil is working against.
On Tue, May 9, 2023 at 11:39?AM JAMES HANLON < knjhanlon@...> wrote:
Ken,
Try sliding a small "refrigerator" magnet around on the case of the meter.? If you can find a spot where it zeros the meter, glue or tape it on there.? If it works, it's an easy, no risk fix.??
Jim, W8KGI
|
Re: Drake 2-B Tuning Shaft Bent???
I meant "much less likely to break."
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- 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???
I guess I was thinking of case hardened which would be much likely to break if bent.
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- 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???
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
toggle quoted message
Show quoted text
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???
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
From: "Dan" <pitfit@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 7:45:14 AM
Subject: Re: [DRAKE-RADIO] Drake 2-B Tuning Shaft Bent???
I, too, suspect a slightly bent 2-B tuning shaft may be a factory installation of a defective part, occurring at some tiny percentage of production output. I cannot imagine any kind of damage or force applied in situ - shipping damage, bench top abuse, dropping the radio, etc. - that could cause a steel shaft to go out-of-true but leave everything so delicate and sensitive around it perfect and untouched. This couldn't be the result of damage-in-place. Had to be installed that way. If one can't just tolerate it and live with knob wobble and occasional dial slippage the only fix is a tear down, attempted straightening and reassembly, and dial restringing. ? Ugh. Dan WB4GRA On May 9, 2023, at 12:38 AM, Pete Doherty W1UO <cqdew1uo@...> wrote:
On Sun, May 7, 2023 at 09:40 AM, william pinkava wrote:
My 2B also had a bent shaft. ?I unstrung the dial and then tapped the shaft back into alignment with light hammer taps while rolling on a flat surface. ?That was the easy part.
Funny thing, my 1st 2B had the same problem! I pretty much did the same. Remove the shaft, tap is straight, reinstall and restring.? I wonder if it was a bad run? Pete W1UO
|
Re: Drake 2-B Tuning Shaft Bent???
I¡¯ve seen a bent shaft in my travels. The three sets I¡¯m working on now are all straight.?
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 13:36, John K5MO < johnk5mo@...> wrote: When your ONE job is to deliver a 4" long 1/4" steel shaft without bending it..... :-)
I agree, tt's hard to picture it being bent after being installed.
John
On Tue, May 9, 2023 at 8:45?AM Dan < pitfit@...> wrote: ?I, too, suspect a slightly bent 2-B tuning shaft may be a factory installation of a defective part, occurring at some tiny percentage of production output.
I cannot imagine any kind of damage or force applied in situ - shipping damage, bench top abuse, dropping the radio, etc. - that could cause a steel shaft to go out-of-true but leave everything so delicate and sensitive around it perfect and untouched. This couldn't be the result of damage-in-place. Had to be installed that way.
If one can't just tolerate it and live with knob wobble and occasional dial slippage the only fix is a tear down, attempted straightening and reassembly, and dial restringing. Ugh.
Dan WB4GRA On May 9, 2023, at 12:38 AM, Pete Doherty W1UO <cqdew1uo@...> wrote:
?On Sun, May 7, 2023 at 09:40 AM, william pinkava wrote:
My 2B also had a bent shaft. I unstrung the dial and then tapped the shaft back into alignment with light hammer taps while rolling on a flat surface. That was the easy part.
Funny thing, my 1st 2B had the same problem! I pretty much did the same. Remove the shaft, tap is straight, reinstall and restring. I wonder if it was a bad run? Pete W1UO
|
Ken,
Try sliding a small "refrigerator" magnet around on the case of the meter.? If you can find a spot where it zeros the meter, glue or tape it on there.? If it works, it's an easy, no risk fix.??
Jim, W8KGI
|
Re: 2-B 50kHz Alignment Question
Caps can drift. Let us know how you fare.?
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 12:22, n4buq < n4buq@...> wrote: Steve,
I'll have to check those.
Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 10:13:47 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Check the values of C50 through C52.? It wouldn't be a bad idea to check the resistors around the tuned circuit, as well.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, May 9th, 2023 at 10:21 AM, n4buq <n4buq@...> wrote:
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???
When your ONE job is to deliver a 4" long 1/4" steel shaft without bending it.....?? :-)
I agree, tt's hard to picture it being bent? after being installed.
John
On Tue, May 9, 2023 at 8:45?AM Dan < pitfit@...> wrote: ?I, too, suspect a slightly bent 2-B tuning shaft may be a factory installation of a defective part, occurring at some tiny percentage of production output.
I cannot imagine any kind of damage or force applied in situ - shipping damage, bench top abuse, dropping the radio, etc. - that could cause a steel shaft to go out-of-true but leave everything so delicate and sensitive around it perfect and untouched. This couldn't be the result of damage-in-place. Had to be installed that way.
If one can't just tolerate it and live with knob wobble and occasional dial slippage the only fix is a tear down, attempted straightening and reassembly, and dial restringing. ? Ugh.
Dan WB4GRA On May 9, 2023, at 12:38 AM, Pete Doherty W1UO <cqdew1uo@...> wrote:
?On Sun, May 7, 2023 at 09:40 AM, william pinkava wrote:
My 2B also had a bent shaft.? I unstrung the dial and then tapped the shaft back into alignment with light hammer taps while rolling on a flat surface.? That was the easy part.
Funny thing, my 1st 2B had the same problem! I pretty much did the same. Remove the shaft, tap is straight, reinstall and restring.? I wonder if it was a bad run? Pete W1UO
|
Re: 2-B 50kHz Alignment Question
Steve,
I'll have to check those.
Thanks,
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 9, 2023 10:13:47 AM
Subject: Re: [DRAKE-RADIO] 2-B 50kHz Alignment Question
Check the values of C50 through C52.? It wouldn't be a bad idea to check the resistors around the tuned circuit, as well.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, May 9th, 2023 at 10:21 AM, n4buq <n4buq@...> wrote:
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
Check the values of C50 through C52.? It wouldn't be a bad idea to check the resistors around the tuned circuit, as well.
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
------- Original Message -------
On Tuesday, May 9th, 2023 at 10:21 AM, n4buq <n4buq@...> wrote:
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
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Re: Contacting K4OAH For Cd's
All is well.? Carol saw my post here and we got everything sorted out. ? I downloaded my ¡®cd¡¯s¡¯ yesterday. ? I am going to print them out today and bind them tomorrow. ? Joe ¨C W7RKN ? From: [email protected] [mailto:[email protected]] On Behalf Of Lloyd Cabral
Subject: Re: [DRAKE-RADIO] Contacting K4OAH For Cd's ? QRZ lists K4OAH as a SK from Feb 2018.
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Re: 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
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Re: Contacting K4OAH For Cd's
Yes, me too.
73 QRO
 Gilles F1BFU since 1969GQRPClub 15889?QRP ARCI 16979
??Le vieux monde se meurt, le nouveau monde tarde ¨¤ appara?tre et dans ce clair-obscur surgissent les monstres¡??? Antonio Gramsci (1891-1937)
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Yes, the SK is correct, but the sale and mailing of his CD's has been handled by a family member since then, up until now, apparently. I ordered and received some since he became SK.
Tom? K0SN On Tue, May 9, 2023 at 7:53?AM Lloyd Cabral < kh6lc@...> wrote: QRZ lists K4OAH as a SK from Feb 2018.
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