UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Chinese 1A2 Super Regenerative FM radio kit

VT FUSE · 30th Dec 2018, 10:46 pm

Yep- the 1A2 is the" low consumption" fil equiv of the DK91,rather like DK91 Vs DK96, 0.025A versus 0.05A,there seems to have been a little East/West variation on nomenclature and also fil technologies,Philips in Holland worked very hard back in 1953 to increase the work efficiency of the oxide draw coated fils in order to halve LT consumption.The other eastern b7g RF valves were in truth around 0.031-0.033mA rather than our 0.025mA series.

This green corrosion product results from long years stood on pins in damp cardboard multi compartment boxes usually in damp storage.

Thanks for info on radio.

Cheers

Mike

30th Dec 2018, 10:46 pm	#77
VT FUSE Hexode Join Date: Aug 2010 Location: Malvern, Worcestershire, UK. Posts: 347	Re: Chinese 1A2 Super Regenerative FM radio kit Yep- the 1A2 is the" low consumption" fil equiv of the DK91,rather like DK91 Vs DK96, 0.025A versus 0.05A,there seems to have been a little East/West variation on nomenclature and also fil technologies,Philips in Holland worked very hard back in 1953 to increase the work efficiency of the oxide draw coated fils in order to halve LT consumption.The other eastern b7g RF valves were in truth around 0.031-0.033mA rather than our 0.025mA series. This green corrosion product results from long years stood on pins in damp cardboard multi compartment boxes usually in damp storage. Thanks for info on radio. Cheers Mike Last edited by VT FUSE; 30th Dec 2018 at 10:54 pm.