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I was incredibly fortunate to come across an original HP mic on eBay a little over a year ago. ?I spotted it in a listing from a trusted seller of Motorola parts that I had bought from before…

any high impedance microphone wired into the correct circular connector ...believe there are posts on the correct 8 pin DIN part number they are available from the typical online parts sources but not

the original SA module only had 10db and 1db scales The later 102 version had 1, 2 and 10 db scales and later versions added adjacent power measurement capability believe there were other updates but

Anyone come up with a suitable replacement or modification for a mic to use with the 8920A ? Thanks, -Steve WA6OXN

The 102 is a later hardware design of the spectrum analyser module. Slightly better performance, but basically the same. Interestingly the SA module from a 8922x will fit in a 8920x. It throws a

Are options 002 and 102 the same thing? Spectrum Analyzer + Tracking Generator? What, if any, are the differences and why the (2) Options #'s ? Thanks, -Steve / WA6OXN

Thanks for the advice. I think I will send it to Amtronix. 73 Jeff n1kdo

The RF I/O is the most difficult assembly? ?to repair in the 892X? series .? ?The other parts are easy to swap and usually not that bad to repair and often can be easily swapped with a used part

I have worked with Rick @ Amtronix in the past and I am 150% satisfied with his work and service. I recommend him all the way if you do not want to tackle the repair yourself. I am not associated with

I second Rick at Amtronics.? He repaired my 8921 twice over the last 5 years or so (for different problems) and also did a full factory cal on it. I was extremely pleased with his service and the

I think i paid about $350 to auburn metrology. Steve Flory W9KOP "I like climbing towers because people look up to me"

Frederick, something like that is in the works based on Paul's recent successful recapping of a dead E8285A PS._________________________________________________________________________________

Has anyone who has recently rebuilt the HP 8935 power supply compiled a list of the capacitors? Preferably with DigiKey or Mouser part numbers? I need to rebuild mine and from pictures on the web it

http://www.amtronix.com/repair.htm "If you have an HP 8920 unit in need of repair and calibration, we're your guys. With over 20 years experience and some 2000 repairs, we have the experience to

Steve how is their pricing compared to Amtronix for cal svcs? 73, Tim KB2MFS

I'd vote for Amtronix. Rick Bowman at Amtronix knows the 8920/8921/8924/8935 family very well and has many spare parts on-hand. The 8920B that I bought from him developed a problem, so I shipped it

If you don't think you are up to the task, it would be worth a call to Amtronix. 73, Tim KB2MFS

I use auburn metrology in bowling green ky? ?they do a good job on mine Steve Flory W9KOP sflory@... "I like climbing towers because people look up to me"

Depends entirely on the value you place on your time. As the years pass more of those projects fail pass the test. Lol Good luck! Colin G4CWH. (8920 owner, living with its frailties.)

My HP8921A is sick. I believe there are problems with the input module.? The internal diagnostics tell me there are problems with the "antenna input detector" (it reads high when it should be zero),