[R-390] HP-8640B Part Needed

[Chuck Rippel]

Anyone have a junker HP-8640B around?  A mechanical coupler in mine 
broke and not all the attenuator steps are working right.  I need to get down to 
the lowest level to do noise floor checks and I simply can't get there.

I could go inside to repair it but those are very precision and I am not too 
quick to do that.

Any help out there?


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Chuck Rippel, WA4HHG
R390A List Co-Administrator
Reply to: R390A@R390A.com

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1968 Contract Dittmore-Friemuth R390A #38
1967 Contract EAC R390A #2808 with outboard Sherwood SE-3 Sync. Detector
1967 Contract EAC R390A #5295
1967 Contract EAC R390A #5591
1967 Contract EAC R390A #1023

All in regular use as premier Shortwave Broadcast DX Receivers
       -and-
Vintage AM Amateur use
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