Tech-Master NIB TV Kit #5516 - Videokarma.org TV - Video

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Tech-Master NIB TV Kit #5516

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12-12-2016, 05:18 PM

Electronic M Electronic M is offline

M is for Memory

Join Date: Jan 2011

Location: Pewaukee/Delafield Wi

Posts: 15,446

They probably selected "controlled warm up" tubes (octals often had a 'GTA' or 'GTB' post fix to identify that IIRC) for the design...Controlled warm up tubes would warm up in sync IIRC by sensing heater current so no tube would be momentarily taking a bigger portion of the voltage than designed.

A thermistor or dropping resistor would not hurt, but is not essential either IMO.

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