[R-390] My R-392 Starts Singing

[Dan Merz]

Osamu,  I agree you have to get it open.  If nothing else just taking the
tubes out and putting them back in may help - not an easy job unless you
have the tube removal tool - I never had one and wrestle with them to get
them out in the tight quarters.  Your correspondence urged me into switching
over to the 26 volt supply which took a bit of wiring to get an ac line cord
properly attached into the Lambda supply,  salvaged from a rack mounted
assembly no doubt with just a terminal strip on the back for all power
connections. The 392 works a little better now.  I'm using the small
LS-166/U speaker so audio is nothing to brag about.  My set has tube audio.
Best regards,  Dan 

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Osamu Hazawa
Sent: Tuesday, January 10, 2006 5:25 AM
To: R-390 at mailman.qth.net
Subject: Re: [R-390] My R-392 Starts Singing
Importance: High

Hello Francesco, Dan, Barry and Tom, 

Sorry for late response.
Thanks for your overwhelming information and sagas about R-392.
I'm so excited about you are being with me.

I have less infromation about my R-392 because I've just started working
with it.

The symptoms I noticed so far are:
 (1)Fair signals can be heard on BC bands (0.5MHz through 1.6MHz).
 (2)Signals can be heard up to 7.999MHz but are getting weaker on 
    higher range and white noise is heard on every around 80kHz(
    This may be caused by a noise generated inside my house).
 (3)Weak Cal tone is heard on some bands and no Cal tone on other
    bands, from 8MHz to 32MHz.
 (4)AGC and limitter is working but the meter indicates under zero 
    without a signal. 

To my shame, I noticed I had forgotten to buy a set of inch size Allen keys
for use of opening up the chassis!!!
So what I can do for now is only wiggling the MC knob back and forth :-)

73's
Osamu Hazawa
http://www4.ocn.ne.jp/~pomerol/MyPage/menu0.html

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