Hi Vic, Poor choice3 of words on my part. I guess a better choice of words would be that the 87A automatically adjusts for minimum swr for changes in swr within a certain range. I know it works over the swr range on 40m from band edge to band edge using a 402cd. I don't manually program the 87a. I leave the amp find the best tuning. This way it is one less thing I need to worry about during a contest. Don't know if this is the best way, but it seems to work fine. Maybe this is called the lazy man's setup?
I use an Acom 2000A at home. The amp is in the basement. The remote control head is in the shack. Very quiet this way - hi. Looking forward to the Elecraft 1500W amp. My wish list is: - 6-160M - select a mode for continuous auto-tune like the 87a - remote control head so I don't need the amp in the shack - QSK switch-over times comparable to Acom and Alpha. - Lots of metering info like the 2000a. 73, N2TK, Tony -----Original Message----- From: Vic K2VCO [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 14, 2006 5:32 PM To: N2TK, Tony Cc: 'Augie (Gus) Hansen'; 'Jeff Stai'; 'Elecraft Reflector' Subject: Re: [Elecraft] What's with the new amplifier? N2TK, Tony wrote: > Yes, the 87A has an auto tuner. From page 7 of the manual: "On any frequency where your antenna VSWR exceeds 1.5:1, it's important to manually program the ALPHA 87A for a proper match. See manual sections 7.2-7.4. Efficiency, linearity, and output often can be improved even when VSWR is less than 1.5:1. The 87A does not contain an antenna tuner. The SWR will need to be tuned via the antenna or an external tuner connected to the output of the Alpha 87A." <http://www.alpharadioproducts.com/87A_manu.pdf> Yes, there is a mode that you can use to adjust the 87A for an antenna that isn't perfectly matched, just like you can with any manually tuned tube amplifier. No it does *not* have a built-in tuner! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco _______________________________________________ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
