[Elecraft] K3 with Heathkit SB200

[K5HM]

All,
Thanks for all the tips. I've installed the Harback mofd in the amp,
including the softkey.   Looks like from  what you all say, I don't need to
worry about the ALC.  

Smoke test tomorrow.  

Tnx. 

73,
Ron, K5HM
k5hm.ron at gmail.com
www.qrz.com/db/k5hm

-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at embarqmail.com] 
Sent: Saturday, April 20, 2013 4:33 PM
To: K5HM
Subject: Re: [Elecraft] K3 with Heathkit SB200

Ron,

Unless the SB200 has been modified to use positive voltage for PTT, you 
will need some sort of interface (like a relay) in the PTT line.  The 
SB200 uses slow open frame relays for T/R switching, so it is not 
suitable for QSK operation, so use PTT in the K3 to allow the realys 
time to switch - or get a QSK add-on mod for the amplifier.

As for the ALC,  the best recommendation is to not connect it. Adjust 
the output of the K3 to properly drive the SB200 and there is no need 
for ALC.

73,
Don W3FPR

On 4/20/2013 4:49 PM, K5HM wrote:
> Have a newly refurb'ed SB200 that I want to run with my K3. But not sure
how
> to proceed.
>
> If anyone is running an SB200 with their K3, I would appreciate any tips,
> especially about the ALC and PTT lines.
>
>