GI-7BT in an SB-230
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Pictures of a Heathkit SB-230 Conversion

This conversion achieves over 500W output, with 40W drive, 2350 VDC on the anode and 24V negative grid bias. Plate idle current is approximately 150mA.

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Finished conversion, top view

Original SB-230 PA, top view

Original PA disassembled

New rear panel + added enclosure

Rear Panel with Fan & Tube Socket

GI7BT heater & cathode wiring

Rear View; Original PA Input ckt used

RF Compartment with GI-7BT air chimney
GI7BT Tube in Socket
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