[Test-Equipment] HP-141-T info needed

[chearn at widomaker.com]

Sounds like the first mixer was vaporized (a common problem).  It has  
been a few years since i last repaired one, but I think it uses 2 HP  
Schottky-barrier diodes in a single-balanced configuration.  That's  
were I'd go first.

Also, a lot of adjustments ca be made w/o cables or removing modules,  
thanks to foresight and thoughtfulness of old-time HP engineers.  Just  
remove top of RF plug and bottom of IF plug to access adjustments.   
Good luck!  Chase/K4AFW

Quoting cemilton at aol.com:

> good day to the list.? I'm new here.? Just acquired an HP-141-T with  
> the following modules:? 8555A RF section 8552B IF section and an  
> 8556A LF section.? I have downloaded the manuals from BAMA and have  
> started reading them.
>
> The analyzer is in working condition, and all of the above modules  
> seem to work fine.
>
> I just acquired an 8553-L RF module and it appears it's not  
> working.? It's not DEAD...........but I suspect the input has been  
> compromised.? I can get a calibration trace with it and the UNCAL  
> lamp appears to be doing its job as well.? But no other signals can  
> be detected.? Either with a short antenna or a signal generator.?  
> The input attenuator has no effect.
>
> First, will the 8553-L work with the above listed sections?? I'm not  
> knowledgeable of this analyzer and it's possible the 8553-L is not  
> compatible.
>
> Next, I have none of the extender boards and cables so servicing a  
> module is pretty much out of the question.? Can someone refer me to  
> a person who can service the 8553-L?
>
> Finally, does anyone have a working 8553-B module for sale.? Or  
> another 8553-L (if it's compatible).? I won't be using a tracking  
> generator if that's of any help.
>
> I restore Boatanchor receivers and transmitters, but readily admit  
> I'm over my head with servicing the 141-T.
>
> Any help or comments to the above would be appreciated.
>
> Thanks in advance.
>
> 73 de W4MIL
> Chuck
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