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 20m 813 Linear Amplifier.

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MM0IMC
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Call Sign : 108-CT-226 / MM0IMC
Posts : 88
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

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