[RFI] [EXTERNAL] Re: EMI-Free Vehicle Inverters

Tue Mar 24 13:13:27 EDT 2020

Thank you!  Will add that to my list of ones to learn more about………I suspect they make similar ones with higher power ratings.

Dave KA8MHW

From: David Eckhardt <davearea51a at gmail.com>
Sent: Tuesday, March 24, 2020 12:58 PM
To: David Klinect <daklinect at aep.com>
Cc: rfi at contesting.com
Subject: [EXTERNAL] Re: [RFI] EMI-Free Vehicle Inverters

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I know you're looking for a 1 kW unit, but I have the following I use camping and I must admit its pretty quiet, RFI wise:

          https://www.amazon.com/Go-Power-GP-SW300-12-300-Watt-Inverter/dp/B001539BCE/ref=sr_1_29?keywords=true+sine+wave+power+inverter&qid=1585068577&sr=8-29<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.amazon.com_Go-2DPower-2DGP-2DSW300-2D12-2D300-2DWatt-2DInverter_dp_B001539BCE_ref-3Dsr-5F1-5F29-3Fkeywords-3Dtrue-2Bsine-2Bwave-2Bpower-2Binverter-26qid-3D1585068577-26sr-3D8-2D29&d=DwMFaQ&c=16VmlS4MonZN71XwTUYWYA&r=5sbCa3A98Man-4HZJmHlahpT0tdipMkWFucGHbSgMLE&m=9sl247UmjKnA0kSUDsFKsA52wiCs3beRiSlU0rc2reE&s=0iqXnz9OESpqbbJgnMkBqYEKT53tbrggCQZU323J3fE&e=>

W0LEV

On Tue, Mar 24, 2020 at 11:33 AM David Klinect via RFI <rfi at contesting.com<mailto:rfi at contesting.com>> wrote:
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<https://urldefense.proofpoint.com/v2/url?u=http-3A__k9yc.com_KillingReceiveNoise.pdf&d=DwMFaQ&c=16VmlS4MonZN71XwTUYWYA&r=5sbCa3A98Man-4HZJmHlahpT0tdipMkWFucGHbSgMLE&m=9sl247UmjKnA0kSUDsFKsA52wiCs3beRiSlU0rc2reE&s=aJphnaQbkj7g6k05LVnYCBzkoZtpr0VnnFzI6xA9BrE&e=>

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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--
Dave - WØLEV
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