2SC1957 linear AMP by JF1OZL
The construction of linear amplifier is common interest of our homebrewer. Because all the SSB transmitter has some kind of the linear amplifier. I will inform you one type of my product.
http://www.intio.or.jp/jf10zl/2sc1957.htm

50MHz linear AMP by JF1OZL
This is a linear amplifier for 50MHz. This machine uses 3 valves. This machine does not use any power transformer for the plate and heater.
http://www.intio.or.jp/jf10zl/50Mlinear.htm

50MHz/6m 8877-based DXpedition Amplifier by G3WOS
In September 2001 I had the opportunity to inspect and admire the amplifier built by Dick, K5AND for his 9G DXpedition. This inspired me to get thinking and building!
http://www.gare.co.uk/amplifier/index.htm

6CL6 single 50MHz power AMP by JF1OZL
6CL6 is a famous valve. It is known as a driver tube used in the Collins transceiver. I made a 50MHz QRP power AMP with this valve. This is normal grounded cathode amplifier.
http://www.intio.or.jp/jf10zl/6cl6.htm

8877 "Lite" A 50 MHz (6m) 20lb Travel Amp by K5AND
As those of you who do expeditions and mountain-top contesting can attest, carrying a kilowatt amp on your quest is SO much fun. Over the years since 1987, I have created 5 travel amps, all for six meters.
http://www.gare.co.uk/k5and/8877.htm

A Compact 8877 50MHz Amplifier and Power Supply by GJ4ICD
The reason for building this amplifier is to conduct Ionoscatter/Troposcatter along with FAI tests, and a good building exercise in producing an amplifier.
http://www.gare.co.uk/gj4icd_8877_amplifier.htm

A Dead Easy 50MHz Preamp by VK3CJS
I modified an old Realistic SSB CB radio for 6 metres. With a bigger PA it got out fine, with reports of good Tx audio. On receive though, it was deaf on account of it's simple grounded-base RF amplifier.
http://www.cgfar.com/vk3cjs/vk3cjs_page7.asp

Mini power Grand grid (GG) amplifier by JF1OZL
In 1993 some projects by 7L1OPH Mr.Yamano about his grand grid amplifier was introduced on the Japanese CQ magazine. I wanted to make such a GG amplifier. But I had no license to use 50W linear.
http://www.intio.or.jp/jf10zl/ggamp.htm