My first selfmade linear with one GI7B

In August 2012 I start with building linear’s. I start at first with one Russian GI7B tube. I finished it in December 2012. I have no pictures any more from the building phase, but I can show you what I have.

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Here is the look from this linear. I hat a Drake antenna tuner in this time, so I made the Drake look 🙂

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The under side from this linear

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In input circuit of the GI7B tube

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The net filter on the 220V side

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A complete overview

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The tube was in a cooling case. The PI-Filter hat two switchable coils, because the roller induct-or was to small.

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The power supply side with near 2000 Volt

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The bias circurit

With this linear you can make 350-400 Watts on SSB.

Here you can download the schematics from the RF part: HF Teil.sch

Here you can download the schematics from the power supply: Netzteil.sch

bias board W4ZT
Here is the schematics for the bias control

I sold this linear, after a longer usage.

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