[Premium-Rx] WJ 8888-2 synthesizer failure

[Heinz Breuer]

Hello Glenn,
thanks for your message.
I will check the battery first thing in the morning.
I downloaded the manual and it seems that the battery is on A22 board behind the front panel.
Do you know of a suitable replacement for the battery?
vy 73 Heinz DH2FA, KM5VT

Von meinem iPhone gesendet

> Am 04.07.2015 um 00:26 schrieb Glenn Little WB4UIV <glennmaillist at bellsouth.net>:
> 
> Has the NiCad battery leaked?
> 
> A leaking battery has all but destroyed two 8888B receivers here.
> 
> 73
> Glenn
> WB4UIV
> 
> At 04:38 PM 7/3/2015, Heinz Breuer wrote:
>> Hello,
>> I bought a Watkins-Johnson WJ 8888-2 receiver last weekend at the HAMRADIO fair in Friedrichshafen/Germany at Lake Constance. The seller assured me that the receiver was working fine and I have no reason to doubt it. Anyhow I put it up today and there is a faulty synthesizer.
>> 
>> I listend to a cw station at 7,021.80 with the 500 Hz filter. When I slowly turned the vfo knop upwards the cw pitch changed as expected. When I reached 7,022.00 there was no change up to 7,029.99. Obviously the actual receive frequency did not change between 7,022.00 and 7.029.99
>> I noticed the same with an SSB station at 7,191.80. The receive frequency didn't change between 7,192.00 and 7,199.99
>> Receiving condition were very poor today and I didn't have much time to evaluate the fault any further but it seems that this fault exists every 10kHz at all freuencies xx,xx2.00 to xx,xx9.99
>> 
>> As a first step I pulled every pc board one by one and put it back in but it didn't help.
>> 
>> I have not yet downloaded the manual and schematics. This will be the next step. I am well aware that the receiver is almost 40 years old. I know that it has tantalum capacitors which are prone to failure.
>> 
>> If anybody experienced a similar fault I would appreciate any hint where I should start looking.
>> 
>> Thanks in advance for any help.
>> 
>> vy 73 Heinz DH2FA, KM5VT
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> 
> ---------------------------------------------------------------------------
> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
> QTH:  Goose Creek, SC USA (EM92xx)                      SBE ARRL  TAPR
> "It is not the class of license that the Amateur holds but the class
> of the Amateur that holds the license"
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