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Charlie Tango 11m DX Radio Group Forum :: Help and Discussion Forums :: Amplifiers
 

 20m 813 Linear Amplifier.

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MM0IMC
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Call Sign : 108-CT-226 / MM0IMC
Posts : 89
Times Thanked : 2
Join date : 2023-03-10
QTH or Location : Ayrshire
Equipment Used : Amstrad 901 Sidebander

20m 813 Linear Amplifier. Empty
PostSubject: 20m 813 Linear Amplifier.    20m 813 Linear Amplifier. Icon_minitimeMon Nov 20, 2023 5:23 pm
I said I wasn't going to build another linear amplifier, but the call of valves that glow in the dark was just too strong! 🤣

This project required two NOS Soviet era GU-13's (813 equivalents), run in grounded grid configuration.   75W in gives 750W out, so a gain of 10dB. Harmonics are down -54dB on the fundamental. 20m 813 Linear Amplifier. 20231115
20m 813 Linear Amplifier. 20231113
20m 813 Linear Amplifier. 20231114

GaryWilson, glenn dog, Nightprowler, SangueG and weealan like this post

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