We repair our 3 GHz Nixie frequency counter plugin, the HP 5254A. 3 gig, not bad for 1964! Things are spicier than with our previous and tamer 500 MHz plugin, so we have to break out the microwave test equipment.
5245L Repair-a-thon Playlist: • HP 5245L Repair-a-thon
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00:00 Summary of previous episodes
01:02 Into the broken 3 GHz plugin
04:05 Mechanical repair
07:52 First try
10:09 Multiplier repair
12:22 Second try
13:36 Multiplier alignment
15:36 Third try
16:27 Second mechanical repair and realignment
22:59 Fourth try - it works!
24:20 Measuring the Apollo S-band transmit frequency
Негізгі бет Ғылым және технология HP 5245L Nixie Counter - Part 4: HP 5254A 3 GHz Plugin Repair
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