[Elecraft] Re: [Elecraft]SEC 1223 & MFJ Supply Dimensions

Thu May 30 21:38:06 2002

These things are weird.  I get absolutely no noise from my SEC 1223 on top 
band or any band -- it couldn't be nicer.  Who knows?

best wishes,

dave belsley, w1euy

--On Thursday, May 30, 2002 7:47 PM -0400 Michael Harris 
<[email protected]> wrote:

> Hi,
>
>> the sec 1223   23a switcher will fit also,even with the feet on; however,
>> no telling how much stuff would be spiting up into the rest of the
>> circuitry in the cabinet.
>> wanting to put a ps & atu in that case. This is same oem ps as kenwood
> sells.
>
> I have an SEC 1223.  Only since listening on Topband have I noticed it
> chucks out crud every 20kHz up the band.  It is definitely being picked up
> by the antenna, I can hear it on both the K2 and another RX powered from a
> different source.  The crud vanishes on the K2 when I switch to the
> terminated Ant-2 port and vanishes on the other RX when I switch the 1223
> off.
>
> I have also noticed that the crud moves in frequency when I toggle the
> display illumination, only to be expected.  Same effect on both receivers.
>
> I believe the noise is on the output leads because when I power another RX
> which uses the raw 13.8V supply line without any internal filtering or
> regulation for some circuitry I hear a low level whine on the audio.
>
> At the moment I'm only drawing 0.30A to 0.32A from the supply on receive.
> No other load but the K2.  The intention is naturally that it will supply
> the demands of the KA100.
>
> Regards,
>
> Mike VP8NO (IOTA SA-002)
> GQRP 10148
> K2 #1400
>
> _______________________________________________
> Elecraft mailing list: [email protected]
> You must be a list member to post to the list.
> Postings must be plain text (no HTML or attachments).
> See: http://mailman.qth.net/mailman/listinfo/elecraft
> Elecraft Web Page: http://www.elecraft.com

----------------------------------------
David A. Belsley
Professor of Economics