K3 with Heathkit SB200

[K5HM]

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.

Thanks

73,
Ron, K5HM
[hidden email]
www.qrz.com/db/k5hm



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[riese-k3djc]

So it is like a new Heath SB 200  ?? then you will have to change the PTT
line and I would suggest
http://harbachelectronics.com/ I did all the mods to one I picked up and
it works
great,,,, run maybe 70 watts or so into it,,, if you have the manual
check on the drive
recommendations,,, the amp is a great old work horse,,,, the harbach mods
are great and EZ to build
consider changing it to 220

Bob K3DJC




On Sat, 20 Apr 2013 15:49:45 -0500 "K5HM" <[hidden email]> writes:

> 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.
>
> Thanks
>
> 73,
> Ron, K5HM
> [hidden email]
> www.qrz.com/db/k5hm
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[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
[hidden email]
www.qrz.com/db/k5hm

-----Original Message-----
From: Don Wilhelm [mailto:[hidden email]]
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.
>
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html