PL519 400W Grounded Grid Amplifier, FRINEAR 400 by PAØFRI This type of linear has many desirable features. PL519 FRINEAR 150, 150 W HF Amplifier by PAØFRIīeing a passive-grid amplifier, most of the input power is dissipated in a non inductieve (carbon) resistor applied to the control-grid of the valve. This particular rig was our "pet" project.
HOMEBREW AMPLIFIER PLANS FULL
There was a big room full of WWII surplus gear. You see when I was in high school, I was a member of an Explorer post that was into Ham Radio. My 813 Linear Amplifier Project by WB8ERJĪctually this rig came back to haunt me. Linear-Endstufe mit PL509 / PL519 durch DL2YEOĭie PL509/519 sind zwar keine echten Senderöhren, aber diverse Artikel und Bauprojekte im Internet belegen, dass man damit durchaus eine zufriendstellend funktionierende KW-Endstufe (Linear RF Amplifier) für wenig Geld bauen kann.
It is a simple, stable and easy to build 5 watts linear amplifier build out of a bunch of ordinary low power NPN transistors. JBOT stands for Just a Bunch of Transistors. JBOT An SSB linear amplifier made from Just a Bunch of Transistors by VU2ESE Stocks in the market seem to be very limited, besides it is very expensive too. It is nowadays hard to find replacement for RF Final tubes such as 6146B 6JS6 etc. Overall gain is in the region of 16dB and the final output power may be well over four watts. This is a rather unusual QRP Power Amplifier design, with a wide frequency response within three dB's from 300KHz to 30MHz. As usual, it is prompted as a result of e-mail in which I have to repeat myself over and over again. This is both a project AND a bit of basic theory regarding the design of wide-band HF power amplifiers. This N-Channel enhancement mode silicon gate power field effect transistor is an advanced power MOSFET designed, tested, and guaranteed to withstand a specified level of energy in the breakdown avalanche mode of operation. This project uses a widely available IRF510 MOSFET. Diode D1 is included to protect the power device, preferrably a hot carrier or gold bonded germanium diode.Īllmode 5-band RF Power Amplifier for the HF 80, 40, 30, 20 and 17 meterband by ON6MU This circuit was described in Sprat 73 by G3ONL and is capable of 5 watts out on all bands. In most respects it is a typical grounded grid linear amplifier, with the exception of a rather unique tuned cathode input circuit that was developed by Pat over 10 years ago. It is only 11″ wide, 4″ high, and 9″ deep. This compact little amplifier is the brain-child of Pat Murdoch, ZL1AXB, in Auckland, New Zealand. Time to upgrade, so I built this one.Ī low cost 600 watt ultra-linear amplifier by IW5EDI It's been a while since I built an amp for HF I'd have to go back to the 60's and a pair of the venerable 3-500z tubes that I put together back then. The gain of a VHF bipolar transistor can be very high but the amplifier was perfectly stable in the experimental phase. This 10 - 80 m amplifier is using two VHF bilolar power transistors PHILIPS BLW60. KISS 70W Power Amplifier using VHF Bipolar Transistors by PAØFRI Though the transmitter was mostly my work, a lot of the work was that of Jim Trutko, W8EXI, and I wanted to build a piece of equipment that was 100% my work.Īfter using the 6CL6 One Tube Transmitter and the 6146B amplifier on the air for several years, I decided that it would be great to have VFO control, rather than crystal control. This 18 dB gain amplifier was built Manhattan-style to evaluate the Linear Technology LT1253 dual video amplifier as a candidate output amplifier for DDS systems employing the Analog Devices AD9850 and similar devices.Īlthough I am an avid proponent of QRP (using reasonable power levels), there are times when I wish that I could run 1,000,000 watts and point it in a particular direction.Īfter I completed the 6CL6 One Tube Transmitter, I decided that I wanted to build a matching amplifier.
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