UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 1948/1949 Philips type 520A television and radio

FERNSEH · 2nd Aug 2016, 11:03 am

Circuit diagrams of the Philips 520A and Mullard MTS521.
V1 (CCH35) functions as the mixer-oscillator on radio and TV sound, the triode oscillator section is common to radio and television. V8 is the vision and sound RF amplifier. V9 is the vision frequency changer. It's likely because of all this complication in the signal circuits none of these receivers were converted to Band 3.

DFWB.

2nd Aug 2016, 11:03 am	#19
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: 1948/1949 Philips type 520A television and radio Circuit diagrams of the Philips 520A and Mullard MTS521. V1 (CCH35) functions as the mixer-oscillator on radio and TV sound, the triode oscillator section is common to radio and television. V8 is the vision and sound RF amplifier. V9 is the vision frequency changer. It's likely because of all this complication in the signal circuits none of these receivers were converted to Band 3. DFWB. Attached Thumbnails