UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Winding a new output transformer for a Philips B5G64A Radio

nzoomed · 1st Jun 2021, 4:03 am

I have a Philips B5G64A Radio that has the primary open circuit thanks to "THAT" capacitor.

I left the OT with a transformer winder a couple of years ago but he has been too busy to look at winding a new one, so I'm going to collect it from him and have a go at winding one myself since I have since acquired a winding machine and a supply of wire and laminations.

I believe it needs a 5K primary, and can't remember what the impedance of the speaker is for the secondary so need to take another look at the speaker.

I was hoping i could disassemble the transformer and unwind it and count the turns, but it is all gunged up with pitch, I'm wondering if this is why the guy I left it with has avoided looking at it for so long?

So basically I need to know how many turns Im looking at to wind my own and what wire gauge, etc.

I'm not sure what impedance the centre tap is tapped on either, its an unusual design.

TIA.

1st Jun 2021, 4:03 am	#1
nzoomed Pentode Join Date: Feb 2016 Location: Tauranga, New Zealand Posts: 132	Winding a new output transformer for a Philips B5G64A Radio I have a Philips B5G64A Radio that has the primary open circuit thanks to "THAT" capacitor. I left the OT with a transformer winder a couple of years ago but he has been too busy to look at winding a new one, so I'm going to collect it from him and have a go at winding one myself since I have since acquired a winding machine and a supply of wire and laminations. I believe it needs a 5K primary, and can't remember what the impedance of the speaker is for the secondary so need to take another look at the speaker. I was hoping i could disassemble the transformer and unwind it and count the turns, but it is all gunged up with pitch, I'm wondering if this is why the guy I left it with has avoided looking at it for so long? So basically I need to know how many turns Im looking at to wind my own and what wire gauge, etc. I'm not sure what impedance the centre tap is tapped on either, its an unusual design. TIA.