What new amp? Just kidding. I think Eric was losing his voice from talking about the new amp. I feel the KPA1500 was the hit of the show. Looks like we got to wait till fall to get one. Eric was taking a list of those interested in getting more info and/or purchasing one. The KPA1500 was using a pair of the switching supplies that are used in the KPA800. Estimated the weight of the supplies at about 19 lbs. Can't remember the weight of the RF deck. I think it was either 23 or 35lbs. You set up the amp to auto tune to your antennas with fixed values of L and C for different band segments. This seems somewhat similar to the Acom 2000A. The difference being the 2000A uses variable L and C. When operating the amp will select the values of L and C depending on the band and band segment. So it is not continuous autotune while operating. I believe the amp measures the reflected power to ensure the final transistors don't get into an unsafe condition. If the reflected power gets too high the power is cut back. I believe this is done with a 3 db pad setup. By the way the final transistors are rated at 500V and run at 60V.
I believe the power out on 6M is 300W. The is due to the gain rolloff of the transistors. The KPA800 and KPA1500 are the same size. The only major difference is that the 800 has the PS internal and the 1500 has it external. There is an RS232 port to run the amp remotely. I plan on doing this since the amp will be in my basement. I think of a nice future upgrade kit to the amp where you would have a RCU like the 2000A that would plug into the RS232 port. There will be a kit and finished/tested amp. With the kit the RF amp boards and the switching supplies will be pre-built. I believe the price for the tested amp is $6K and the kit version is $5.6K. Hopefully I didn't mess up too much in my description. Bottom line - it was impressive and I want one. N2TK, Tony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Monday, May 22, 2006 9:52 AM To: [email protected] Subject: [Elecraft] Hey, you Dayton hf attendees Can't believe no one has mentioned the new amps. I await opinions of the amps. Are you attendees so QRP you didn't even look at em?? Let's hear it from you QRO guys. I'd like to know your opinion. Any mention of when they will be for sale? I really like what I have seen and heard so far on the reflector and want one in my shack. 73, George, n4ym _______________________________________________ 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 _______________________________________________ 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
