Electronics funny.
In article , Rod Speed
wrote:
"charles" wrote in message
...
In article l.net,
Dave Liquorice wrote:
On Sun, 14 Apr 2019 08:00:12 +0100, Brian Gaff wrote:
its affected by proximity, sounds more like a parasitic oscillation
of some sort.
That's what I'd be looking for. Monitor the cuurent draw, does it
follow the buzz level? The buzz is a symptom of the PSU running out of
steam, do the driver chips/transistors get warm/hot?
As it takes a while to appear and does so slowly I'd guess that it's
only just unstable and requires a signal to kick it off.
as I said - check the power supply.
Pointless with two new devices with a decent brand like that.
somebody in purchasing thought they could shave €0.1 off the cost by buying
cheaper compoents? The BBC once sent back a whole batch of AVO8s because
they were inaccurate. It does happen.
--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle
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