OK, that may come in handy. Made a stupid mistake in my ALC comments though. It is the linear which generates the negative ALC voltage (0 ~ -5V) and not the other way around as I described. The K3 is set-up to receive a positive ALC voltage, which need some external circuitry to adapt for a neg. ALC.
Oh, and do not panic about my stated delivery time. It is on MY request and not because Elecraft cannot deliver earlier. Regards, Enno Korma, PF5X -----Original Message----- From: Doug Faunt N6TQS +1-510-655-8604 Subject: Re: [Elecraft] K3: RE: OT Expert 1k Amplifier From: "Enno J. Korma, PF5X" Date: Thu, 22 Nov 2007 20:40:30 -0000 ALC interfacing is recommended with this kind of linear. I have already asked on this reflector how this should be done with the K3. The K3 delivers a positive ALC voltage whereas the linear - like other types - needs a negative voltage. Wayne had replied that this needs a little external circuitry which will be described in due time. (Looking to the schematics I believe the K3 does not carry any negative voltage line at all). Take a look at the io board- there's a negative voltage generator there that drives the RS232 level converter. Page 9 of the downloadable schematics, KIO3 Main, sheet 2. It's not really our Elecraft until we've modified it ourselves. 73, doug No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.16.4/1145 - Release Date: 22-Nov-2007 11:49 _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
