[Elecraft] KPA500 Clicks & Pops

[James Bennett]

Ed,

Haven’t seen a response from him yet, but he may be taking about 160 meters. From what I have read, that may be an acceptable thing on that band, given QSB, band conditions, and antenna limitations.

Jim / W6JHB

> On Oct 17, 2018, at 1:34 PM, Edward R Cole <kl7uw at acsalaska.net> wrote:
> 
> Bob,
> 
> A question about your statement that you run 400w in digital modes (assuming you mean FT8, etc. and not RTTY).  That seems pretty extreme.
> 
> I pretty much ignore HF usage as I am not on HF very much (primarily an eme'er on 6m+).  But back at the beginnings of psk-31 I built a HB interface* for my FT-847 and did a bit of 14.070 operating (with a dipole).  I was recommended to not exceeding 25w (or 25% full power).  Everyone seemed to do quite well on psk-31 with low power and some ran at QRP (<5w).
> 
> I do not get why I hear of running high power digital when 10% would communicate easily.  You may remonstrate me for running 2m-eme at 1500w on JT-65 but the path loss on 2m-eme is 254 dB+ and contacts are made over a half-million mile path.  Certainly not encountered by terrestrial HF users.
> 
> Not picking on you personally, but you made the statement so figure maybe would reply.  Just curious.
> 
> 73, Ed - KL7UW
> * that I/F later was used for JT-65 on eme 15 years ago.  Now use my K3 directly connected.
> 
> Date: Tue, 16 Oct 2018 16:59:15 -0500
> From: Bob McGraw K4TAX <rmcgraw at blomand.net>
> To: "Dauer, Edward" <edauer at law.du.edu>
> Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] KPA500 Clicks & Pops
> Message-ID: <E5D42F71-B9CB-4E3C-A332-C82501750BC8 at blomand.net>
> Content-Type: text/plain;       charset=us-ascii
> 
> I do run 400 watts or so on digital modes.  Issues are not really noted on SSB or CW modes.
> 
> I've set the Fan Ctr to 2 and 3 and still noted the issue
> 
> Was recently showing my K Line to some hams friends. They commented rather negatively on the point.
> 
> Bob, K4TAX
> 
> 
> 73, Ed - KL7UW
>  http://www.kl7uw.com
> Dubus-NA Business mail:
>  dubususa at gmail.com 
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