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

[David Klinect]

Thank you, Don............more good ideas to investigate!  Dave KA8MHW

-----Original Message-----
From: Don <kb5kwv at gmail.com> 
Sent: Tuesday, March 24, 2020 3:55 PM
To: David Klinect <daklinect at aep.com>
Subject: [EXTERNAL] Re: [RFI] EMI-Free Vehicle Inverters

This is an EXTERNAL email. STOP. THINK before you CLICK links or OPEN attachments. If suspicious please click the 'Report to Incidents' button in Outlook or forward to incidents at aep.com from a mobile device.

I use this inverter off of my bench batteries to run my PC, monitor and 

such. I mounted close to the batteries with 12" cable, I have very 

little RFI, mainly 160/75 Meters. The noise is about 3-5 dB above 

background noise.



https://urldefense.proofpoint.com/v2/url?u=https-3A__smile.amazon.com_gp_product_B00F4TBW6S_&d=DwICaQ&c=16VmlS4MonZN71XwTUYWYA&r=5sbCa3A98Man-4HZJmHlahpT0tdipMkWFucGHbSgMLE&m=M9s9Qujl4vGEHAKgBPgq9rWZ--uwcZtDpxxG6p1eN0A&s=MAvo0BjPQ5tc4TUhaCjKDhr30FtedBKfyfuM-neWq6g&e= 







On 3/24/2020 6:33 AM, David Klinect via RFI 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.

>

>

>

> https://urldefense.proofpoint.com/v2/url?u=http-3A__k9yc.com_KillingReceiveNoise.pdf&d=DwICaQ&c=16VmlS4MonZN71XwTUYWYA&r=5sbCa3A98Man-4HZJmHlahpT0tdipMkWFucGHbSgMLE&m=M9s9Qujl4vGEHAKgBPgq9rWZ--uwcZtDpxxG6p1eN0A&s=6zPiBYSgyslBCdmUg6Rl8UDjpYuHbHVB7TuhwAHh6_g&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

> _______________________________________________

> RFI mailing list

> RFI at contesting.com

> https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.contesting.com_mailman_listinfo_rfi&d=DwICaQ&c=16VmlS4MonZN71XwTUYWYA&r=5sbCa3A98Man-4HZJmHlahpT0tdipMkWFucGHbSgMLE&m=M9s9Qujl4vGEHAKgBPgq9rWZ--uwcZtDpxxG6p1eN0A&s=FpVPbZ_t_rnvxidS5IiPrvAGnfNsAwz3t4QtwZpNSpY&e= 



-- 

This email has been checked for viruses by Avast antivirus software.

https://urldefense.proofpoint.com/v2/url?u=https-3A__www.avast.com_antivirus&d=DwICaQ&c=16VmlS4MonZN71XwTUYWYA&r=5sbCa3A98Man-4HZJmHlahpT0tdipMkWFucGHbSgMLE&m=M9s9Qujl4vGEHAKgBPgq9rWZ--uwcZtDpxxG6p1eN0A&s=PZJQ_R6VzVELf_LVbuYo7yWCgZyCyPbNOZq5AJ6n4CA&e=