UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Questions on 160/80 metre AM transmitters.

Bazz4CQJ · 11th Jan 2023, 8:18 pm

Mmmm, perhaps I should come clean and tell you that I have bought a DC70 valve. Used on MoD UHF walkie talkies, it has a quick-heat filament (1.2V, 200mA) which I suspect will give adequate emission well below those numbers. We are talking about ~1/10th the power used by an E valve heater. A D-valve VFO has been at the back of my mind for decades

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11th Jan 2023, 8:18 pm	#134
Bazz4CQJ Dekatron Join Date: Apr 2009 Location: Oxfordshire, UK. Posts: 4,935	Re: Questions on 160/80 metre AM transmitters. Mmmm, perhaps I should come clean and tell you that I have bought a DC70 valve. Used on MoD UHF walkie talkies, it has a quick-heat filament (1.2V, 200mA) which I suspect will give adequate emission well below those numbers. We are talking about ~1/10th the power used by an E valve heater. A D-valve VFO has been at the back of my mind for decades . B __________________ Saturn V had 6 million pounds of fuel. It would take thirty thousand strong men to lift it an inch.