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Old 14th Oct 2018, 6:14 pm   #7
G0HZU_JMR
Dekatron
 
Join Date: Sep 2010
Location: Cheltenham, Gloucestershire, UK.
Posts: 3,077
Default Re: MuTek Pre-amps for the FT290R

In the case of my mk1 FT290R the Mutek board is just a little PCB of size approximately 50mm x 35mm. It contains a small TR relay and a dual gate Mosfet amplifier. There is also a tuned circuit at the input to the Mosfet and a simple lumped BPF at the output. Just after the Mosfet there is also a tiny series trimmer resistor that is part of a resistive pi attenuator that can be used to vary the overall gain.
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Regards, Jeremy G0HZU
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