[drakelist] Need WV-4 meter

[Philip M. Roberts]

"Philip M. Roberts" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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The meter on my WV-4 is broken. Does anyone know where I can buy a meter. 
Maybe it will be easier to buy a whole unit.

Thanks for reading this.
Phil  W8UV 

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[drakelist] Re: MC10138P IC

[Mike Williams]

"Mike Williams" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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Well,
I replaced U9013 on the DR-7 Board and it has now been running for 7 hours 
without a blip.  U9013 was the culprit (thermal intermittent) on the DR7 and 
was found with freeze mist and alot of patience.  Thanks much to Bill for 
sending me one of his stock parts for this repair.  The IC is a 10138 ECL 
chip which is hard to come by these days unless you want to but a dozen or 
more.  Thanks to the Drakelist for helping me out on this repair, and of 
course Bill!  VIVA TR7!!!

Regards,
Mike W4DL
- Original Message - 
From: "Bill Frost" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 22, 2005 9:17 AM
Subject: Re: MC10138P IC


Hello Mike,
The IC will ship today.
73, Bill
--- [EMAIL PROTECTED] wrote:
Dear Bill Frost,
fran donovan just sent you money with PayPal.
fran donovan is an Unverified buyer.
--
Payment Details
--
Amount: $15.00 USD
Transaction ID: 9JF792129D3153900
Subject: MC10138P IC
Note:
Hello Bill,
hope this came through OK,
Regards,
Mike W4DL
View the details of this transaction online at:
https://www.paypal.com/us/vst/id=9JF792129D3153900
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fran donovan's CONFIRMED Address
-- 

fran donovan
1010 se 7th ave
pompano beach, FL
33060
United States
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RE: [drakelist] TR7 X-talfilter bandpass

[Dick Harms PA2DW]

"Dick Harms PA2DW" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Hi Garey,

I found it a bit hard to explain it, but the way you describe it is exactly
what I mean! We are definitely hearing "the other side". Strange that both
our TR7's have the same thing, but we will check the -5V and the pindiodes!
Thanks for the suggestions Garey!

73, Dick PA2DW

-Oorspronkelijk bericht-
Van: Garey Barrell [mailto:[EMAIL PROTECTED]
Verzonden: zaterdag 5 maart 2005 19:37
Aan: Dick Harms PA2DW; drakelist
Onderwerp: Re: [drakelist] TR7 X-talfilter bandpass


Dick -

If you are saying what I think you're saying, the ultimate rejection of
all the filters is specified as greater than 100 dB.  IF the passband
tuning is set correctly, either variable or the five pots up on the
power supply board, you should NOT hear the "other side" of zero beat!

I would suspect the -5V supply (actually ~-3.5V) or the MPN3404 PIN
diodes that switch the filters in and out.

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual




Dick Harms PA2DW wrote:

> Hi all,
>
> Yesterday I worked on the TR7 of Evert/PA2KW who had a loss of 20 dB
> of receiver gain. It appeared that the J310 on the second filter PWB
> did not get its supply, because the 47 Ohm resistor in the drain was
> "cracked". Hard to see, but easy to measure...
>
> After we but back the TR7 in service, we listened the band on CW with
> both the 250 and 500 Hz filter. Evert has had a TR7 before and he
> recalled that the bandpass in CW on his previous TR7 was better. What
> we noticed is that the CW signal was audible at both sides of the
> zero-beat point. The difference between the signal that was within the
> filtercurve and the one that should be out of that, was only 20 dB. We
> adjusted the PBT carefully but that gave no improvement. At home I
> checked my own TR7 and it appeared almost the same! On my R4C it was
> however much much better, certainly when I switched on the Sherwood
> 600 Hz roofing filter of course.
> Now the question is, is this indeed normal on the TR7? Or do Evert and
> I have some problem in the x-tal filter?..
> Any info is most wellcome.
>
> Best 73, Dick/PA2DW


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Re: [drakelist] TR7 X-talfilter bandpass

[Garey Barrell]

Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Dick -
If you are saying what I think you're saying, the ultimate rejection of 
all the filters is specified as greater than 100 dB.  IF the passband 
tuning is set correctly, either variable or the five pots up on the 
power supply board, you should NOT hear the "other side" of zero beat!

I would suspect the -5V supply (actually ~-3.5V) or the MPN3404 PIN 
diodes that switch the filters in and out.

73, Garey - K4OAH
Atlanta
Drake C-Line Service Manual


Dick Harms PA2DW wrote:
Hi all,
 
Yesterday I worked on the TR7 of Evert/PA2KW who had a loss of 20 dB 
of receiver gain. It appeared that the J310 on the second filter PWB 
did not get its supply, because the 47 Ohm resistor in the drain was 
"cracked". Hard to see, but easy to measure...
 
After we but back the TR7 in service, we listened the band on CW with 
both the 250 and 500 Hz filter. Evert has had a TR7 before and he 
recalled that the bandpass in CW on his previous TR7 was better. What 
we noticed is that the CW signal was audible at both sides of the 
zero-beat point. The difference between the signal that was within the 
filtercurve and the one that should be out of that, was only 20 dB. We 
adjusted the PBT carefully but that gave no improvement. At home I 
checked my own TR7 and it appeared almost the same! On my R4C it was 
however much much better, certainly when I switched on the Sherwood 
600 Hz roofing filter of course.
Now the question is, is this indeed normal on the TR7? Or do Evert and 
I have some problem in the x-tal filter?..
Any info is most wellcome.
 
Best 73, Dick/PA2DW
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[drakelist] TR7 X-talfilter bandpass

[Dick Harms PA2DW]

Hi all,
 
Yesterday I worked on the TR7 of Evert/PA2KW who had a loss of 20 
dB of receiver gain. It appeared that the J310 on the second filter PWB did not 
get its supply, because the 47 Ohm resistor in the drain was "cracked". Hard to 
see, but easy to measure...
 
After we but back the TR7 in service, we 
listened the band on CW with both the 250 and 500 Hz filter. Evert has had a TR7 
before and he recalled that the bandpass in CW on his previous TR7 was better. 
What we noticed is that the CW signal was audible at both sides of the zero-beat 
point. The difference between the signal that was within the filtercurve and the 
one that should be out of that, was only 20 dB. We adjusted the PBT carefully 
but that gave no improvement. At home I checked my own TR7 and it appeared 
almost the same! On my R4C it was however much much better, certainly when 
I switched on the Sherwood 600 Hz roofing filter of course.
Now the question is, is this indeed normal on the TR7? Or do Evert 
and I have some problem in the x-tal filter?..
Any info is most wellcome.
 
Best 73, Dick/PA2DW

[drakelist] Drake 2B front panel removal

[DW Holtman]

Hello,
 
I'm in the middle of removing the front panel from 
a Drake  2B. Everything is off except the Pass band selector switch (the 
pointer for .5, 2.1 and 3.6 khZ). I cannot see anyway to remove it to remove 
the pointer short of  the completely disassembling  the  passband assemby. 
That is something that I don't want to do. Has anyone removed the front panel 
before?
 
Thank you in advance. 
 

[drakelist] Off-Topic, But...

[richard radke]

richard radke <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
Morning Guys,
Anybody on the list have any experience running a gas powered AC 
generator on a boat?...A buddy and I are putting a /mm field day 
operation together on my 20ft pontoon boat this year...Anchored in the 
middle of the lake, multi-band vertical clamped to the rail, you get the 
idea...Anyway, what things do we have to consider with respect to AC 
ground?...We don't want to go QRP with batteries, or use the boat's 12V 
system and just let the outboard idle for 24 hours...Any thoughts?
Rick W9WS
ex k9rsw
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[drakelist] TR-3 PTO not working

[Jim Theisen]

Hi Folks
 
As I recover from back surgery. I am trying to 
revive my newly purchased TR-3 rig.
I am getting no frequency output from the PTO. The 
6AU6 tube seems ok. I am new at this and am checking Resistance and Voltage. Any 
help on the best way to check for problems with the PTO would be 
appreciated.
 
73
 
Jim WB8REH
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