[time-nuts] Zeta Labs X76 Multiplier 7600 MHz Output Model 5856-01

Brooke Clarke brooke at pacific.net
Tue May 6 14:13:46 EDT 2008

Hi Matt:

Is it possible to make a DC measurement (DMM Diode function) of the SRD forward 
and reverse voltage?

Have Fun,

Brooke Clarke
http://www.prc68.com/P/Prod.html  Products I make and sell
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Matt Ettus wrote:
> On Mon, Apr 28, 2008 at 4:15 PM, Rick Karlquist <richard at karlquist.com> wrote:
>>I worked for Zeta Labs many years ago.  This multiplier
>> undoubtedly has a step recovery diode that is being driven
>> at a level of a good watt or two.  In most cases there was
>> a hefty transistor to make this power.  You probably need
>> +10 dBm or so to drive it, maybe as much as +20 dBm.  Take
>> the cover off and look at the input section and it should
>> be apparent if there is any additional gain.  You can always
>> start at 0 dBm and work up, looking at the power out as you
>> go along.  The adjustment of these can be very tricky, so
>> proceed with extreme caution.
> Rick,
> I just got the multiplier.  It draws about 220mA at 15V, but won't
> produce any output.  I've given it a wide range of input powers from
> very low up to about 20dBm.  I took off the bottom cover, but it only
> exposes the back of a very complex circuit board.  The only accessible
> parts are the trimmer caps which come through the PCB.
> Any suggestions?
> Thanks,
> Matt
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