Try as I might, I cannot hear a single thing from my 5065A, which has
run 24/7 for five years without issue.
Jared earlier said he has inverter noise from his 5065A and now Magnus
reports it also. How common is this?
I will be interested in a replacement A15 regulator board as Ulf
Kylenfall SM6GXV described. Let's allow Ulf to build and test the PWBs
he receives and then some kind of group buy could be arranged.
I have an operation manual from ArtekMedia for the 5065A but it shows
the older OCXO and has no service details or schematic. Is a more
complete manual available anywhere?
Larry
On 12/2/2021 2:49 PM, Magnus Danielson via time-nuts wrote:
Hi Jared,
One of my 5065's have exactly this fault.
One approach is to rebuild with a new power inverter. Another is to
rebuild the amplifier board so it does not need -20 V and can operate
only on +20 V.
There should be DC-DC inverters, but I failed to grab a suitable
pre-built board for it.
I would enjoy not having to hear the 3.5 kHz switching frequency in my lab.
Cheers,
Magnus
...
--
Best wishes,
Larry McDavid W6FUB
Anaheim, California (SE of Los Angeles, near Disneyland)
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