Author Topic: HP 8920B service monitor repair(It's Alive!)  (Read 7108 times)

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Offline mojoe

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Re: HP 8920B service monitor repair(It's Alive!)
« Reply #25 on: March 07, 2019, 04:21:38 am »
If you got Option 55, then you really lucked out. It wasn't very commonly installed, as your average two-way radio shop didn't need anything below VHF.
 

Offline TheSteve

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Re: HP 8920B service monitor repair(It's Alive!)
« Reply #26 on: March 07, 2019, 05:52:58 am »
Yep, it was the only reason I sold my 8921A.
VE7FM
 

Offline VE2UM

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Re: HP 8920B service monitor repair(It's Alive!)
« Reply #27 on: March 08, 2019, 02:47:47 pm »
Effects of excessive reverse energy into the DUPLEX OUT port (probably a 40 Watt mobile...)

Ugly, the board is not recoverable (burnt trace)...
 

Offline BFabio

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Re: HP 8920B service monitor repair(It's Alive!)
« Reply #28 on: March 14, 2019, 03:36:25 pm »

Hello, I have an HP8920A that has an error in the measurement of Spectrum Analyzer, measuring 0dBm and making a bridge between the duplex out connector and antenna on the screen to the right lvl measures -3.38 dBm, so it has that errror.
I know it is an amplifier that is running out and I need help to know what it is and if someone has the scheme.
Thank you.
 


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