UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Help to identify old Philips valve radio. BIF 571A.

stofbj1 · 16th Jun 2019, 11:16 pm

Hi,
I am no expert on valves, they were way before my time.
Hope someone can help to identify an old Philips valve radio, the only number on the back is 2H61644. I am looking for a schematic diagram for this. The radio works but the volume is very, very low. I checked the main filter electrolytic cap 50+50uf and its reading 49 + 41.4 which is not bad, another 5mf is reading 4.9uf, and one 100uf 12.5V negative end going to chassis and positive to a valve, this is reading high at 162uf. Another 2200pF is reading 4630pF so well out of spec. The reason I need the schematic is because there is another black beauty and I can not make out the reading on it. All the valves seem to light OK.
I have already cleaned out the variable tuning capacitor metal plates and the switch contacts. Any help would be appreciated, the stations it does pick up are clear, no hum just the volume issue. One one off knob is missing in the picture. I will take some voltage readings on the main filter cap tomorrow.

Thanks in advance.

16th Jun 2019, 11:16 pm	#1
stofbj1 Triode Join Date: Sep 2018 Location: Killarney, Co. Kerry, Republic of Ireland Posts: 27	Help to identify old Philips valve radio. BIF 571A. Hi, I am no expert on valves, they were way before my time. Hope someone can help to identify an old Philips valve radio, the only number on the back is 2H61644. I am looking for a schematic diagram for this. The radio works but the volume is very, very low. I checked the main filter electrolytic cap 50+50uf and its reading 49 + 41.4 which is not bad, another 5mf is reading 4.9uf, and one 100uf 12.5V negative end going to chassis and positive to a valve, this is reading high at 162uf. Another 2200pF is reading 4630pF so well out of spec. The reason I need the schematic is because there is another black beauty and I can not make out the reading on it. All the valves seem to light OK. I have already cleaned out the variable tuning capacitor metal plates and the switch contacts. Any help would be appreciated, the stations it does pick up are clear, no hum just the volume issue. One one off knob is missing in the picture. I will take some voltage readings on the main filter cap tomorrow. Thanks in advance. Attached Thumbnails