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Radio1950 · 8th Oct 2021, 5:52 am

I think that you may struggle with that detector circuit suggested by Marconi?

I wonder what the context is, and how they suggest you use it?

I just did some tests with a number of detector diodes including a number of 1N21 type (similar to CS2A) into a 50uA 3000 ohm meter, and the voltage level is just too low at 100mV PD 50, (-13 dBm50), for the diodes to work.

This type of detector circuit is OK at levels above about 200 mV RMS, and about the best type diode is a BAT45 as it is cheap and readily available.

8th Oct 2021, 5:52 am	#16
Radio1950 Hexode Join Date: Apr 2017 Location: Buderim, Queensland, Australia. Posts: 428	Re: Marconi TF1066B/1 I think that you may struggle with that detector circuit suggested by Marconi? I wonder what the context is, and how they suggest you use it? I just did some tests with a number of detector diodes including a number of 1N21 type (similar to CS2A) into a 50uA 3000 ohm meter, and the voltage level is just too low at 100mV PD 50, (-13 dBm50), for the diodes to work. This type of detector circuit is OK at levels above about 200 mV RMS, and about the best type diode is a BAT45 as it is cheap and readily available.