Joel and all: The 80w amplifier I build is the Klitzing amp described, below.
I purchase the unpopulated pc board from Jim and order all other components. I install them in Hammond enclosure with same heat sink Jim recommends, plus a 120mm square fan controlled by a thermistor-based ckt. I also add a bar meter which indicates relative output. I also use the ALC kit from Jim to sample RF power for the meter.
It runs with 8amp quiescent current at near class-A operation so very linear in output. No preamp is included but the TR relay allows bypass in OFF so you do not need to disconnect the amp if not needed. I agree with Joel that there are better preamps than typically embedded in most ham VHF amps.
I handle PayPal sales for the popular WA2ODO preamps (6m-13cm). 73, Ed - KL7UW snipped----------------- I convinced Jim to design and build an amplifier that would make my K3 competitive with the typical 100 W HF-VHF transceivers. With my great receiver and 10 W transmitter, I was hearing people and they weren't hearing me. By staying at the 100 W level, I could use the same power supply that my K3 used for HF. I have been using the amplifier for years and been very happy with it. It is very linear up to 80 W PEP out on SSB, but happy to do CW and FM at 100 W. See the article at: May 2013 -- QST (p. 30) Build a Linear 2 Meter 80 W All Mode Amplifier Jim offers PC boards, unpopulated, as well as largely complete, for reasonable prices via his web page at w6pql.com. This amplifier is the size of a brick, probably costs less and is a much better product, in my view. I recommend it without reservation. Regards, Joel Hallas, W1ZR Westport, CT 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
