UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

boxdoctor · 3rd Sep 2015, 9:11 am

Hi Howard,
The resistor and capacitor numbers will depend on which service sheet you are using. I am using the Trader sheet Nr1374. The manufacturer's sheet part designations will be different.
On the Trader sheet, they are labelled as R33 and C65 respectively. They both have one end connected to pin 3 of V6, the EL84 valve. The cap is that large pinky one in your photo, lurking near the vol/tone controls. The resistor is 150 Ohm and is worth measuring with an ohmmeter as it's being of the correct value is important to the comfortable operation of the EL84. A replacement shoud be at least 1Watt rating. It is likely to be Ok, I think. Ensure the capacitor is connected with the negative end to chassis. If the VHF is poor, experiment with substituting an EF183 or EF184 for either/ both of the EF80s. No modifications needed when trying that. Tony.

3rd Sep 2015, 9:11 am	#30
boxdoctor Rest in Peace Join Date: Sep 2010 Location: Ripley, Derbyshire, UK. Posts: 785	Re: Philips B3G63A Hi Howard, The resistor and capacitor numbers will depend on which service sheet you are using. I am using the Trader sheet Nr1374. The manufacturer's sheet part designations will be different. On the Trader sheet, they are labelled as R33 and C65 respectively. They both have one end connected to pin 3 of V6, the EL84 valve. The cap is that large pinky one in your photo, lurking near the vol/tone controls. The resistor is 150 Ohm and is worth measuring with an ohmmeter as it's being of the correct value is important to the comfortable operation of the EL84. A replacement shoud be at least 1Watt rating. It is likely to be Ok, I think. Ensure the capacitor is connected with the negative end to chassis. If the VHF is poor, experiment with substituting an EF183 or EF184 for either/ both of the EF80s. No modifications needed when trying that. Tony.