[time-nuts] 5087A Distribution Amplifier

[Brian Kirby]

Your the winner - filter cap open - 407 picofarads (suppose to be 1500 
microfarads !)

Jean-Louis Oneto wrote:
> Hi Brian!
> Last time I had this problem, it was the VERY BIG capacitor (1500MFD - 
> 40VDC) which measured as 21.8pF (yes PicoFarad!!!)
> Jean-Louis Oneto
> OCA GEMINI - Avenue Copernic - 06130 Grasse - France
> Tel: (+33)[0]493.40.53.80, Fax: (+33)[0]493.40.53.33
> e-mail: Jean-Louis.Oneto at obs-azur.fr
> ----- Original Message ----- 
> From: "Brian Kirby" <kirbybq at bellsouth.net>
> To: "Time Nuts" <time-nuts at febo.com>
> Sent: Wednesday, May 02, 2007 9:54 PM
> Subject: [time-nuts] 5087A Distribution Amplifier
> 
> 
>> I bought an HP 5087A distribution amplifier off of ebay.  "The unit is
>> in good working condition".  Funny the power supply is putting out 120
>> hertz square waves.....which makes all the outputs look like they are
>> oscillating garbage....disconnecting the power supply from the load does
>> not change the situation.  I subbed a test power supply and the
>> amplifiers work fine.
>>
>> Does anybody have the schematic to just the power supply and could I
>> bother you to scan it and send to me, or a link to get it, or the manual ?
>>
>> The power supply looks very simple, but the schematic sure makes life
>> easier !
>>
>> Thanks in advance - Brian N4FMN - kirbybq at bellsouth.net
>>
>>
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> 
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