[Elecraft] normal K3 voltage drop on TX

[Chester Alderman]

I just quickly tested my K3 s/n 8895 at 100w output into a 52 ohm dummy
load. Key up = 13.5 vDC;   Key down = 21.6 vDC. My power cable between my K3
and the Astron 75 amp power supply is homemade #8 twin wire about 8' long.

73,
Tom - W4BQf


-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
Charles Yahrling
Sent: Friday, August 21, 2015 11:06 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] normal K3 voltage drop on TX

What would be a normal value on the FP voltage display when tx at 100W,
using factory fused cables? No sub installed.

PS is Astron VS-35M linear, voltage set at 13.9 idling per FP display.
drops to 11.1 on TX.  Current varies but up to 15.5A indicated. Specs call
for 17-22A tx @100W.

I suspect bad pass transistor and/or high drop over fuses, but want to
establish normal indication for tx drop.  11.1v seems way out.

tnx in advance

--
de AB1VL
NAQCC #6799

ab1vl.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to aldermant at windstream.net