[Premium-Rx] New WJ8617B problems

[Geoff Greer]

Hi,

  You should find out if you have an S1 model. Check the processor board 
(A5A3 full size next to the board with the 2 sets of dip switches , up 
front) for which processor is there.  The S1 will use a 68B09 and be marked 
796353 - something.  The manuals are somewhat different.   DRS probably can 
supply the manual set at a $$$$ price.    Fair Radio and Helmut Singer are 
possibilities too.

Geoff



----- Original Message ----- 
From: "Gedas" <w8bya at mchsi.com>
To: <premium-rx at ml.skirrow.org>
Sent: Sunday, October 08, 2006 10:53 PM
Subject: Re: [Premium-Rx] New WJ8617B problems


> Hi Geoff, thanks for the much needed suggestions.  I think at this point I
> need to find a good schematic and calibration manual for my radio.  Any
> ideas where I might be able to get one?
> Gedas
>
> Gallery http://gedas.cc
> Web Page http://www.w8bya.com
>
> ----- Original Message ----- 
> From: "Geoff Greer" <greer86 at attglobal.net>
> To: "Gedas" <w8bya at mchsi.com>; <premium-rx at ml.skirrow.org>
> Sent: Sunday, October 08, 2006 8:17 PM
> Subject: Re: [Premium-Rx] New WJ8617B problems
>
>
>>  You are probably a victim of 1 or more "red end" tantalum capacitor
>> failure(s).  The smoke was probably from burnt resistor(s). You could 
>> also
>> have some board damage.   I would suggest replacing them with milspec
>> M39003 type caps.  These are hermetically sealed so you will not have
>> burned circuit boards if the cap fails.  These caps show up on EBay at
>> quite reasonable prices.  BTW, the high voltage supply uses a couple of
>> the caps. I would change those out even if they seem to be OK.  If you 
>> are
>> lucky the HV assembly wil not be soldered shut.  I have seen arcing
>> problems with these supplies, a little bit of Corona dope does wonders in
>> curing that.
>>
>> Geoff
>>
>>
>> ----- Original Message ----- 
>> From: "Gedas" <w8bya at mchsi.com>
>> To: <premium-rx at ml.skirrow.org>
>> Sent: Sunday, October 08, 2006 7:31 PM
>> Subject: Re: [Premium-Rx] New WJ8617B problems
>>
>>
>>>I am glad you solved your problem.  Now, this is funny and sad at the 
>>>same
>>> time....I turned on my 8617B to run the test for you and I notice that
>>> the
>>> pan display is sweeping all the way to the right and only about 1/2"
>>> wide.
>>> As I stare at it thinking, it just needed some more warm up time, I
>>> notice
>>> huge amounts of thick smoke rising from the receiver.  Powered it down 
>>> as
>>> quick as I could.  Looks like your 8617B is fixed and mine needs fixing.
>>> Let the fun begin.
>>> Gedas
>>>
>>> Gallery http://gedas.cc
>>> Web Page http://www.w8bya.com
>>>
>>> ----- Original Message ----- 
>>> From: "spencer bahner" <spencer12345 at msn.com>
>>> To: <premium-rx at ml.skirrow.org>
>>> Sent: Sunday, October 08, 2006 6:43 PM
>>> Subject: [Premium-Rx] WJ8617B problems
>>>
>>>
>>>> Thanks to all who sent feedback on areas to target with my 8617B tuning
>>>> problem. Turned out to be some form of contamination on the optical
>>>> encoder.
>>>> Took it apart eneough to visualize the encoder wheel (with its TINY
>>>> slots),
>>>> the reflecting mirror and the light source/sensor combo. No visible 
>>>> crud
>>>> but
>>>> dusted it all off and ran some paper over the mirror and sensor and no
>>>> more
>>>> problems. Should be good for another 25 years!
>>>>
>>>> Spencer Bahner N7UMO
>>>> Seattle
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>>
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>>>> Visit the Website: http://kahuna.sdsu.edu/~mechtron/PremRxPage/
>>>
>>>
>>> _______________________________________________
>>>
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>>>
>>
>
>
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>
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>