[Elecraft] KPA500 Clicks & Pops

[Edward R Cole]

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
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