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ms660 · 16th Nov 2017, 8:38 pm

Various Bush radio circuits have a grid stopper for the IF amp valve, but some like the DAC31 don't (according to the Trader sheet) even though it uses the UCH42 and the UBF80 like the DAC41, interestingly though it uses an anode tap on the 2nd IF transformer, the rest of the circuit and components are more or less the same as the DAC41.

The AC31 also has no grid stopper but has the anode tapped 2nd IF transformer.

Lawrence.

16th Nov 2017, 8:38 pm	#80
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Oh No! Not another howler. Various Bush radio circuits have a grid stopper for the IF amp valve, but some like the DAC31 don't (according to the Trader sheet) even though it uses the UCH42 and the UBF80 like the DAC41, interestingly though it uses an anode tap on the 2nd IF transformer, the rest of the circuit and components are more or less the same as the DAC41. The AC31 also has no grid stopper but has the anode tapped 2nd IF transformer. Lawrence.