From: Eric Webner 
Subject: Re: [drakelist] TR-4 Problems


Eric Webner  made an utterence to the drakelist gang
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Hello Vance,
 
I remember that the OA2 tube is a voltage regulator tube. Perhaps power
supply voltages would be the first thing to look at.
 
If you are looking for someone professional to repair it, the following web
page should be helpful. (This site should be helpful to writers of other
recent posts who are looking for parts)
http://www.wb4hfn.com/DrakeParts.htm
 
This is a great general Drake site, so after you find what you need, check
out the other pages by hitting the Drake Home Page link. Kudos to Ron
WB4HFN !!!!!!
 
73,
 
Eric KA8FAN


Vanmor{at}aol.com wrote:
Hello,
 
I have a Drake TR-4 that I think I have ruined.
 
Some years ago, a friend at work gave me a TR-4 he bought brand new back in
77. However, he had stored it in his storage room and a mouse had built a
nest in it.
 
Well I cleaned it up and it actually worked !
 
It would get kinda quirky sometimes. I tried to nutralize the finals one
time and that's when my troubles began. It quickly went into self
ocillation and burned a 470 ohm resistor going to T10. It had no audio or
would not key up the relays. OA2 doesn't seem to light up anymore either.
 
I gave the radio to another friend who said he knew a guy who could fix it.
Well, I got the radio back the other day. My friend never got it fixed.
 
I would really hate to trash this radio, it worked pretty good when it was working.
 
Anybody got any ideas where to start ?
 
Thanks
Vance
N5HNY

		
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Hello Vance,
 
I remember that the OA2 tube is a voltage regulator tube.
Perhaps power supply voltages would be the first thing to look
at.
 
If you are looking for someone professional to repair it, the
following web page should be helpful. (This site should be helpful to
writers of other recent posts who are looking for parts) http://www.wb4hfn.com/DrakeParts.htm;">http://www.wb4hfn.com/DrakeParts.htmhttp://www.wb4hfn.com/DrakeParts.htm">http://www.wb4hfn.com/DrakeParts.htm;
 
This is a great general Drake site, so after you find what you
need, check out the other pages by hitting the Drake Home Page link. Kudos
to Ron WB4HFN !!!!!!
 
73,
 
Eric KA8FAN
Vanmor{at}aol.com
wrote:


Hello,
 
I have a Drake TR-4 that I think I have ruined.
 
Some years ago, a friend at work gave me a TR-4 he bought brand
new back in 77. However, he had stored it in his storage room and a mouse
had built a nest in it.
 
Well I cleaned it up and it actually worked !
 
It would get kinda quirky sometimes. I tried to nutralize
the finals one time and that's when my troubles began. It quickly
went into self ocillation and burned a 470 ohm resistor going to T10. It
had no audio or would not key up the relays. OA2 doesn't seem to light up
anymore either.
 
I gave the radio to another friend who said he knew a guy who
could fix it. Well, I got the radio back the other day. My friend never got
it fixed.
 
I would really hate to trash this radio, it worked pretty good
when it was working.
 
Anybody got any ideas where to start ?
 
Thanks
Vance

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