From: Dieter Horst 
Subject: Re: [drakelist] TR-7 Receiver Noise


Dieter Horst  made an utterence to the
drakelist gang
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Hi Vic and group,

some years ago I replaced a 'semi-faulty' transistor in the audio chain
which caused some
kind of noise or rumble.

Unfortunately, I don't remember which transistor it was. It most likely was
located on
the 2nd IF / Audio board. 

In general, try to find out whether your noise is caused by the audio amp
or some other source.

What happens if you disconnect the antenna? 

BTW, the hum from the switch line for the PS7 mentioned by other list
members, I encountered
here as well. 

73, Dieter DL5RDO



> vmilam{at}att.net made an utterence to the drakelist gang
> ----------------------------------------------------------------------
> Greetings.
> I recently put a TR-7 on the air that I purchased several months ago. All
> is fine except that there is what I can best describe as a low frequency
> "rumble" noise that is most noticable when using headphones.
It is very
> audible even with the RF gain set to max and the audio gain set to min. I
> have listed with another receiver and do not hear this noise, so I don't
> think I have any interference in the shack.
> When tuning in signals, there does not appear to be any distortion, but
> the background noise is very noticable.
> Any suggestions greatly appreciated.
> Vic K5TAG
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On Behalf of Dieter Horst 
Submissions:        drakelist{at}www.zerobeat.net
Unsubscribe:        majordomo{at}www.zerobeat.net - unsubscribe drakelist in body
Hopelessly Lost:    majordomo{at}www.zerobeat.net - help in body of message
Zerobeat Web Page:  http://www.zerobeat.net
Brought to you courtesy of TLCHost.net  http://www.tlchost.net/
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