Time for a scope.
I still think you've got a contact problem somewhere. The switch wafers in the
B's are a big improvement over the A's, but they can still get crudded up.
The fact that you can receive on either the transmitter or receiver suggests a
problem in either the FUNCTION switch, gain control, or contacts in the tube
sockets.
Steve Wedge, W1ES/4
Live free or die: Death is not the worst of evils.
John Stark.
All my computers have my signature with various pearls of wisdom appended
thereto.
From: [email protected]
Sent: Wednesday, January 11, 2012 3:34 PM
To: [email protected]
Subject: Re: [Drakelist] Drakelist Digest, Drake B Line No Output
In a message dated 1/11/2012 12:49:04 P.M. Eastern Standard Time,
[email protected] writes:
There's a signal not getting to the final or even the driver, more than
likely.
You have to break it down: There's the 5595 crystal oscillator that runs
regardless of band, the band oscillator that runs at the frequency determined
by the band crystal and the PTO output.
If you have the transmitter hooked to a receiver, can you receive signals
when you turn the control over to the transmitter? If you can, it eliminates
the band oscillator and the PTO circuits as the culprits (as well as the
premixer).
Given that it's intermittent, I'm betting on a dirty contact somewhere -
including tube sockets.
Steve
-----Original Message-----
From: [email protected]
Sent: Jan 11, 2012 12:13 PM
To: [email protected]
Subject: Re: [Drakelist] Drakelist Digest, Drake B Line No Output
In a message dated 1/11/2012 11:34:32 A.M. Eastern Standard Time,
[email protected] writes:
Fred, when you run in SPOT, do you have the GAIN turned up at all? How
about in CW?
Steve, W1ES
-----Original Message-----
From: [email protected]
Sent: Jan 11, 2012 12:27 AM
To: [email protected]
Subject: Re: [Drakelist] Drakelist Digest, Drake B Line No Output
Well, the problem continues.
It worked for a short time but is not working again. Replaced V-1 and V2
with tested used tubes. V1 was N.O.S.
I did substitution of all the tubes with used and tested tubes without any
change in output.
The spot position does not put out a signal either. Even when put into AM
and using the spot function, I can hardly hear that tone in the receiver
either....
Both VFO's will work the receiver.
I have idle current when in tune position or when PTT on mic. no other
output. No output when speaking or whistling into the mic either
Any other ideas?
Where to look next?
Sprayed the wafer switches with Deoxit and another plastic safe contact
cleaner even though the wafers are phenolic and not plastic. Band switch is not
any stiffer than it was when I bought the twins 5 years ago so I don't think
that is the problem.
I tried 75 meters and 40 meter both with the same results. No output.....
Where should I start to look for the problem? Any ideas would be
appreciated.
Thanks
73 de Fred WD8ADG
Steve:
In spot I don't hear the birdy sound on SSB setting. On the AM setting the
sound is very low compared to how it should sound and with the gain advanced I
usually hear the mic. but very little mic sound with gain advanced now.
Fred WD8ADG
Steve:
Both Transmitter and Receiver VFO will receive a signal.
Fred WD8ADG_______________________________________________
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