[R-390] R-390A Restoration Progress (part Deux)

[Richard W. Solomon]

The RF (Line ?) filter is the culprit. Radio turns on and makes
noise. The audio pot is scratchy, need to attend to that.
I'll see if I can hear anything tomorrow.

At least there was no black smoke issuing forth !!

73, Dick, W1KSZ

-----Original Message-----
>From: "Richard W. Solomon" <w1ksz at earthlink.net>
>Sent: Dec 12, 2008 8:34 PM
>To: r-390 at mailman.qth.net
>Cc: "Richard W. Solomon" <w1ksz at earthlink.net>
>Subject: Re: [R-390] R-390A Restoration Progress (or lack of)
>
>I checked the Electrlytics when I replaced the not so wet any more
>Tantalum. They looked good on the ESR Meter. I tested all the tubes 
>and they checked OK.
>
>One thing someone mentioned I should look into. The Power Strip line
>is "fused" by a GFI breaker. So are all the outlets in the garage.
>
>I'll bypass the filter and see what happens.
>
>73, Dick, W1KSZ
>
>-----Original Message-----
>>From: rbethman <rbethman at comcast.net>
>>Sent: Dec 12, 2008 7:44 PM
>>To: r-390 at mailman.qth.net
>>Cc: "Richard W. Solomon" <w1ksz at earthlink.net>
>>Subject: Re: [R-390] R-390A Restoration Progress (or lack of)
>>
>>Dick,
>>
>>I know of NO line filters being "available".  C103 is either right next 
>>to the line filter OR is the line filter.
>>
>>You either HAVE to bypass it OR re-build it.
>>
>>Unfortunately this IS a reality of life.  The OTHER possible issue is 
>>that 1) the power micro-switch is STUCK closed.  2) IF 1 is true - then 
>>the two CAP cans on the Audio Deck could ALSO be bad.
>>
>>Check the circuit board under the Audio Module.  Sometimes an audio tube 
>>goes bad AND takes out one of the larger carbon composition resistors.
>>
>>My "best" guesses.
>>
>>Bob - N0DGN
>>
>>Richard W. Solomon wrote:
>>> I got to the point of putting AC to it. That's after replacing
>>> the "IF Killer" cap and the "Audio Leaking" cap. Tested all the
>>> tubes in a TV-7, replaced 3 of them. Cleaned off the 1" of crud
>>> from 10 years storage in the barn.
>>>
>>> So, now lets apply power or not !! As soon as I plug it in the
>>> breaker on the strip pops. (yes, the radio is in the off position
>>> when I do this). I assume it must be the Line Filter so tomorrow
>>> I shall bypass it and see what happens.
>>>
>>> There is also C103. Not sure where in the circuit it lies.
>>>
>>> Are replacement Line Filters available ? And no, I am not in the
>>> mood to rebuild it !!
>>>
>>> 73, Dick, W1KSZ
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>>>   
>>
>>-- 
>>Bob - NØDGN
>>
>