Philips radio BCA628A (Algemeen)

door Maurice , Dordrecht, 27.04.2022, 10:11 (941 dagen geleden) @ Pandu Rajan
Bewerkt door Maurice, 27.04.2022, 10:18

You can't lower C1 as long as Secondary voltage 272V ac is.

As found on a picture, Main transformer should be A3.141.68

EL41, I mostly check the voltage across the cathode resistor to determine the current
through output tube roughly.It also indicates a correct Bias setup for the tube.

To determine the Anode current just measure the Amp through measuring across the primary
output transformer. Indeed you shorten the output transformer and therefore silence the sound through this method, but its a correct way.

To solve the issue you could put a series resistor app 470 Ohms and couple of Watts.

EDIT: A3.141.68 also found in the BX520A, Vc1=265Vdc, Vc2=245Vdc, indicating the transformer should be 250-0-250 in my opinion.

--
"I haven't even turned this on to see if it works because as long as I don't it might"