Ron, Your best bet is a KPA100 - it couples with the K2 and everything is automatic in operation. I recall that the FCC requires amplifiers which operate with less than 50 watts input to be sold legally in the US, so you do not see many amplifiers with 100 watts out and 5 or 10 watts in that can operate in the 25 MHz region - remember the CB amplifer problems.
However, if a linear amplifier is capable of 500 or 600 watts output with 50 or 60 watts input, then it should produce about 100 watts out with 10 watts in. So if you have such a linear amp already, hook it up. You can use the N0SS amp keying kit or the WA6HHQ amp keying circuit shown on the Elecraft website - Builders Resource page -> Application Notes. Your other possibility is to homebrew an amplifier. If you have tubes, a pair of 6146s or 807s or 1625s would do the job and require a lot less than 10 watts drive (assuming grid driven). There are several amplifier kits available, but many are the amp only and do not include low pass filters nor T/R switching. If you have the K60XV option in your K2 (Sorry, but I can't remember), there is an amp keying circuit on that board already, all you would need is a jack to bring it out. 73, Don W3FPR KM4VX wrote: > I know about the KPA/100 option for the K-2, but wonder if there are any > alternatives for obtaining 100 watts output or better from the K-2. I am > looking for an amplifier that might produce 100 watts or better with an > input of only 10 watts from the K-2. If anyone knows of one out there it > would be interesting to have that information posted here. I would find a > separate amplifier unit more convenient than an internal upgrade to the K-2. > Thanks. KM4VX > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.339 / Virus Database: 270.12.83/2191 - Release Date: 06/21/09 > 05:53:00 > > ______________________________________________________________ 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
