[Elecraft] K3 & L4B

[Adrian]

Just to elaborate the circuit is here;

http://www.somis.org/D-a-07B.jpg

Mains 120v ac supply rectified to feed 150vdc  + supply to the resistor volt
drop > speed up circuit is necessary to achieve the HC-1 or RJ-1A <2mS 
switch times good fo 35wpm, with no relay noise.

 120 - 150 vdc is necessary to supply the circuit. Using 12v to 26v supply
or the available L4B 27 vdc relay supply is a waste of time and too slow.
120vdc is the normal relay supply in the sb-220 (conv to FWB rectifier
recommended) so is readily available for this circuit. Radj is varied to
suit supply vdc level.

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Adrian
Sent: Friday, 8 June 2012 6:46 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 & L4B

QSK is well worth implementing, I did this with my sb-220, which is a very
similar 3-500z based amp. See;

http://www.wb4hfn.com/DRAKE/DrakeArticles/L4B-QSK/QSK_L4B.html

Also a rf choke and capacitor bleed on the ant rly (ptt line in) at the amp
is worthwhile to prevent any rf flowing down this line to the K3.

Adrian ... vk4tux

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Keith Neighbors
Sent: Thursday, 7 June 2012 10:26 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3 & L4B

Anyone using a K3 with a Drake L4B linear? any problems?
73
Keith

-- 

______________________________________________________________
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

______________________________________________________________
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