[Elecraft] K3 External ALC Mod

The mod revision sheet of the digital IO board shows the 69.8K soldered to pin #1, and the 100K soldered to pin #20. The remaining leads of these two resistors appear to be soldered to pin #9 along with one end of the 137K. The other end of the 137K goes to who knows where. The cut trace does

[Elecraft] K3 External ALC mod?

Where can I find the "EXT ALC mod document" mentioned in the beta-release notes? Phil - AD5X ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): h

Re: [Elecraft] K3 External ALC Mod

Roy, Yes, they are relatively critical. Only one minor point - they do not "produce" - 4 volts of ALC, instead, they allow an ALC voltage of up to -4 volts (from the amplifier) to be translated to the positive ALC voltage required by the internal circuits in the K3. If you skip to the photo o

Re: [Elecraft] K3 External ALC mod?

I was told last Friday by Scott at Elecraft that parts for the mod were arriving that day, and that documentation and parts would be available very soon. I took this to mean within a week or so. I believe that a mod that adds pullup resistors for bandswitching the Yaesu Quadra amp will become ava