[Elecraft] Follow-up to OT

Ray wa6vab at gmail.com
Sun May 1 01:48:26 EDT 2022


Jim
I found the (so called Optimizers) to be VERY Noisy when the Sun is Just starting to hit the Solar Panel ARRAY 
and the Optimizer it Trying to Balance the Current (load) of ALL the  panels.
I would Bet the FCC Test are being Run when the Sun is Either Full ON or Full OFF, Not in its Full Dynamic Switching Mode.
Ray WA6VAB K3 (sum what Retired) 


From: Jim Brown
Sent: Saturday, April 30, 2022 10:26 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Follow-up to OT

On 4/27/2022 2:45 PM, jerry wrote:
> Samlex inverters

These inverters are NOT quiet.  Slide 213 in this pdf shows what I had 
to do to kill the trash coming out of their SMALLEST one to use it to 
power the logging computer for HF mobile contesting!

http://k9yc.com/KillingRXNoiseVisalia.pdf

  My partner in these events, W6GJB, bought one or two sizes up; it was 
MUCH worse, and there was nothing we could do to make it usable.

FCC Part 15 Class B is still a very loose RFI spec, and the specified 
testing setups fail to reveal the design and construction errors that 
can cause massive radiated trash.

73, Jim K9YC
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