The ALS600 manual says that the rear apron control sets the control voltage for the ALC and the front panel control fine tunes it. You could probably set both of these full open, but I chose to set them mid way. The ALS SET pot on the front of the amp can be turned counter clockwise and the amber light marked ALC will flicker to a point and then stay on. As you continue to turn it counter clockwise, the amp output is reduced. I don't really use this anymore, but when I had a hunk of wire that loaded on 160, sometimes I was able to squirt some RF out before the amp tripped off by turning this pot counter clockwise. But I never mess with it anymore since I have surrendered to the gods of suburban living and don't have the space for a useable 160 antenna.
It's a vestige, I guess. And I like to follow manuals, which says to have the ALC light blink every once in a while. Regarding the TX Delay, I never answered that. The original ancient open frame TR relay in this amp is crap. Its slow and it wakes the dead every time you trip it. You cant do VOX, let alone QSK! I use a microHAM MicroKeyer 2 with this rig and a MicroKeyer 1 with my TS570. These have PA PTT delay timing adjustments and I used to set those for the amp/rig PTT sequencing, or else I would end up hotswitching the amp. The new TR relay is more than fast enough so that you don't need the MK sequencer anymore, just set all the delays to zero and everything works as it should. But the BEST thing you can do for your ALS600 is to install AD5X's QSK Relay mod. It is absolutely the best thing I have done for my ALS600 and makes it into a REAL FULL QSK amplifier, which, when teamed with the K3 QSK, is as flawless as any TenTec I have ever used, the previous QSK "Gold Standard" in my book. With the MicroKeyer on SS keying and the new relays in the amp, all you hear are little soft clicks, not the SLAM! SLAM! SLAM! of the original TR Relay, and full QSK works FB too! -lu- Message: 31 Date: Tue, 22 Dec 2009 12:12:32 -0800 (PST) From: W4GRJ <w4...@satterfield.org> Subject: [Elecraft] [K3] RE: K3 to ALS600 Amplifier To: elecraft@mailman.qth.net Message-ID: <000801ca8343$08584310$1908c9...@org> Content-Type: text/plain; charset=us-ascii Lu, Thank you for a very complete description of your K3 operation with ALS600. I am confused about your control of the ALS600 ALC controls on the back and the front since there is no ALC connection from the K3. What is the effect of the ALC controls in this case? No virus found in this outgoing message Checked by PC Tools AntiVirus (6.1.0.25 - 6.13960). http://www.pctools.com/free-antivirus/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
