Philips B2G04U (Techniek Radio/TV)

door Robert Gribnau , Konongo, Ghana, 24.04.2024, 22:32 (10 dagen geleden) @ DonaldStott

Given the voltages noted in the schematic on which I based my prior posts, the anode current you measured (26.4 mA) seems low to me.

That with Ohm's Law you derived the dc-resistance of the primary to be very close to your measured 331 Ohm by measuring the anode current, is not surprising.

What voltage do you measure on the "top side" of the primary (which according to the schematic I bases my earlier posts on is the same as the screen grid voltage of the UCL82)?

What is the cathode voltage of the UCL82? And is the value of the cathode resistor in your radio 390 Ohm, like in the schematic I based my prior posts on?

But probably more to the point: What problem are you trying to solve in your B2G04U?

--
Groet,
Robert