« previous next »
Pages: [1]   Go Down

Author Topic: HP 8552A repair  (Read 1445 times)

0 Members and 1 Guest are viewing this topic.

Offline Martin.MTopic starter

  • Frequent Contributor
  • **
  • Posts: 966
  • Country: de
  • in Tek we trust
    • vintage Tek collection
HP 8552A repair
« on: September 15, 2019, 07:22:21 pm »
I have a repair in the 8552A  IF Plugin for Spectrum analyzer.

Problem: there are 2 neon bulbs what are zener with 103 volts, 0,2 up to 3mA.
I am searching for replacements, it have to be z 103v with low temperature drifting.

For insiders: they are in the vertical deflection board, it`s the second from the backside.

Martin
« Last Edit: September 15, 2019, 07:27:35 pm by Martin.M »
Logged
 

Offline Martin.MTopic starter

  • Frequent Contributor
  • **
  • Posts: 966
  • Country: de
  • in Tek we trust
    • vintage Tek collection
Re: HP 8552A repair
« Reply #1 on: September 16, 2019, 06:44:33 pm »
done !

a new ZZ1000 neon stabi (= 81V) in series with a BZX55C22 (22 volts zener) delivers 102,3 Volts (22°C),
hair dryer blown to 50°C = 102,38 Volts. The spectrum analyzer likes that and is working.

Martin
Logged
 
Pages: [1]   Go Up
« previous next »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf

 


EEVblog Main Site EEVblog on Youtube EEVblog on Twitter EEVblog on Facebook EEVblog on Odysee