[Elecraft] Reverse ALC

[Björn Mohr]

On 080229 18:30 , "Jerry Flanders" <jeflanders at comcast.net> wrote:

> At 01:33 PM 2/23/2008, Björn Mohr wrote:
>> I am looking for a simple solution to reverse the K3 ALC input to a negative
>> going ALC circuit. If you have interfaced your K3 with any amp using
>> negative ALC, please let me know your solution.
> 
> Hi Björn
> 
> I haven't seen any reply to your question posted yet.

I have not received any solution in private either, but quite a few asked me
to share any information received so there seems to be  need for it.

> The question of the ALC compatibility has come up
> before. Elecraft have promised that they will
> provide a solution soon. See their K3 FAQ at
> <http://www.elecraft.com/K3/K3FAQ.htm>http://www.elecraft.com/K3/K3FAQ.htm
> , where they state: "Once ALC is working to our
> satisfaction, we'll provide simple interfacing
> information that will allow the use of negative
> control voltages (probably a resistive divider
> pulled up to a positive supply, or at most an op-amp circuit)."
> 
> So you might want to query Elecraft directly to
> see if this design is complete yet.

Yes, now I remember now seeing that. I will send a request to support if
nothing show up here in a few days.

73 de Björn /SM0MDG