On 2021-09-13 12:56, chetsubacco...@snet.net wrote:
Any other suggestions before I bit the bullet and prepare to send it to
Elecraft? Thanks for any ideas.
Generally, when miscellaneous weird stuff happens to a piece of complex
equipment - stuff that seems to have no relationship the one to the
other- my first instinct
is to check the power supplies. Not just the main 13.8V power, but also
any lower
( or higher! ) transformed voltages.
Here's an example - I have a Fluke 3000 signal generator that mostly
works....except when it doesn't. It has a pair of 18V power supplies -
plus & minus. The RF guts are
in a multitude of little shield cans. In each can - well, in most of
them - are a
couple of 10uF tantalum caps, one on the positive leg, one on the
negative leg. Once in a while, one of them will short out, disabling
that particular power supply. When one of those 18V supplies goes out,
pretty much everything dies.
Power supplies are like octopi - with tentacles going into every part
of the radio.
No guarantees of course - but when seemingly unrelated stuff starts
failing, that's where I look first.
- Jerry KF6VB
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