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Date Posted by Category User IP

2011-11-14 (UTC)

N0YK

VHF/UHF Amplifiers

400 Watt 2 Meter GI-7B Amplifier

I have a custom built 2 meter amplifier running a Russian GI-7B triode tube. The amp if very popular and built by Carey/KC5GTT. The amp has around 60-65% efficiency with built-in power supply and RF relay. Measures 12w x 12d x 10.5h. Has a beautiful blue powder coated case and wired for 110v mains. Very basic amplifier, plenty of room for someone to go in and add features. Voltage/Current meter are the same meter, current reading needs calibrated but voltage is showing right at 1800 vdc on idle. Amplifier will run 400 watt all day long.
Power readings taken with a Bird 43 on input and PowerMaster with VHF coupler on output in FM mode:
20w in and 200w out
30w in and 300w out
40w in and 400w out

Asking $500 plus shipping.
Email me with more questions, for video of operation or additional pictures.

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