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HP 4957A – Part 3
Finishing the repair For finishing everything I have replaced the temporary cap with the exact replacement which is luckily available. The replacement made a calibration…
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HP 4957A – Part 2
Where do we continue? First: the battery The battery in my 4957A was completely empty and had first signs of leakage at some pins. So…
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HP 4957A – Part 1
Uhh not pretty anymore A couple of days ago my 4957A arrived from Frances. It worked for a few minutes until the Schaffer line filter…
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HP 4951C – Part 3
Fixing the signs of time Finally I got everything delivered. A couple of caps, a new, hopefully quieter fan and of course the RIFAs which…
