Posted by
aj4tf on
Nov 11, 2019; 10:29am
URL: http://elecraft.85.s1.nabble.com/K3S-100-TX-current-on-20m-tp7656371.html
Something that I have recently noticed on my K3S/100 : DC current draw on 20
meters is significantly higher (+4 amps) than the other HF bands at the same
power setting and input conditions into a dummy load (into antenna, same
thing). This is both before and after performing a TX Gain Cal.
Test conditions: mode Data A, input single test tone from FLDIGI software
(4-5 bars ALC), tone level & frequency not changed during the tests, ATU
bypassed, ANT1 selected. Power supply voltage in RX, 14.3 V, RX current
1.2 - 1.3 amps.
This ONLY occurs on 20m, the other HF bands seem to be OK. (6m is higher
than the HF bands by about 2 amps, not sure if that is normal or not). For
example, with 80W out: 80m, 60m, 40m, 30m, 17m, 15m, 12m, 10m are all close
to 16 amps, but 20m is 20 amps. (6m is 18 amps).
I searched the archive and found a few references to "bad low pass filter".
I have already emailed details to
[hidden email] but wondered if there
is something I can check in the meantime until they get back to me.
73 David AJ4TF
--
Sent from:
http://elecraft.365791.n2.nabble.com/______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.htmlMessage delivered to
[hidden email]