Hi all, I recently came across a product on ebay that I was wondering if anyone had used.
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This item is used with a tube rectifier to delay application of B+ in the amplifier or radio. It does this through a timing circuit, delaying turn-on for an additional 15-30 seconds beyond the tubes normal characteristics. For a typical 5U4 that amounts to 20-30 seconds or a 5AR4/GZ34 about 30-45 seconds before the tube begins applying high voltage.
Based on a DYNACO Mark III with 6550 tubes, the tubes are warmed up enough to prevent the spike in high voltage and it settles down safely under the rating of the filter capacitor, not shooting up to 600 Volts, well beyond the Mark III's capacitor rating of 525 Volts. This item should be a welcome addition where tube are used
In addition, 1000Volt PIV silicon protection diodes are built in, providing a measure of safety to the rectifier tube and amplifier circuit.
Use this synchronizer to prevent any likelihood of amplifier tube cathode stripping. Because the output tubes are functioning normally and the voltage is at operating level, no inadvertent damage should occur.
This add-on will increase the overall height of the rectifier tube installation by one inch. Please check your cage clearance or space above (below) to ensure there is room available.
Flat rate shipping, No additional shipping charges beyond the quantity one order