Hi Al,
Maybe apples and organges and may not be! I'm at a loss.
We used a standard, old-fashioned rotary AC alternator, probably 8-10
kW or so. It's not a DC-AC inverter type, so I expect that it makes a
real sine wave, though I readily admit that didn't put a scope on it to look.
The other rigs were a mix of linear and switcher supplies. They
didn't cause me any problems and the particular rig that caused me
grief didn't seem to cause them any trouble. At least, I never heard
of any. You're right though: since the '1000D uses a switcher it may
make lots of hash under a heavy load and very little under light
load. That possibility hadn't occurred to me. Whatever it was, it was nasty!
Kim N5OP
At 09:36 PM 6/25/2012, you wrote:
Kim,
May be "apples and oranges" here, but have you ever looked at the AC waveform
at the base of a typical cheap CFL on a scope? It's not pretty - the
switching PS in them puts a lot of garbage back into the AC line. I'm
wondering if something in your FD setup caused the '1000D switching PS (AFAIK
it uses a switcher) to send some "hash" that might normally be suppressed
back down the AC feed to your rig's PS to upset it.
'Nuther thought - were the external PSes at the other positions linear or
switchers, or a combination? What brands?
Or, it might be a plain ol' RF issue....
73, Al
On Mon June 25 2012 8:26:58 pm Kim Elmore wrote:
> I'll pop this out here to see if anyone has any good explanations for
> what I experienced.
> ....
> Has anyone ever heard of anything like this? Is there something
> unique about the FT1000D power supply or the rig itself that causes
> stuff like this?
>
> Kim N5OP
>
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