Thanks, Jim. Not looking at any specific ham band..............would prefer
that It be EMI-Free on all (or as much as possible) of the HF range. Always
appreciate your insights into these matters.......as well as your write-ups and
tutorials.
Dave KA8MHW
------------------------------------------
On 3/23/2020 12:36 PM, David Eckhardt wrote:
> How much power (watts) are you shopping for? I presume you are going from
> a 12 vdc system to a 120 vac/60 Hz system?
And on what band(s) does it need to be quiet? Page 13 of the link below
details what we had to do to a GOOD unit to make it quiet enough to hear
weak signals on a Hamstick 3 ft away. The little clamps with no winding
(with ferrites, this counts as a single turn) are for VHF; those with
multiple turns are for the HF bands we were using mobile -- 15,20, 40.
Except for those single-turn clamps, all the ferrites are Fair-Rite #31.
http://k9yc.com/KillingReceiveNoise.pdf
BTW -- we were unable to kill noise from a bigger unit in the same
product series of "pure sine-wave inverters."
73, Jim K9YC
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