What things need replacing on this PYE VHF 2D? - UK Vintage Radio Repair and Restoration Discussion Forum

AmateurRepairer · 3rd Mar 2021, 7:00 pm

I’ve done standard stuff so far, took audio pcb out as well as two transformers out for testing, took tuning capacitor out and cleaned vanes and exterior, cleaned chassis up and cut out all wax, Eire and hunts caps all for replacement.

Do these sets need anything else changing? It shorted out on first power up but that was my fault I think as the mains cable was split.

Any advice greatly appreciated. I’ve got to repaint dial knobs, trim and regeneration cabinet as well as make a knew baffleboard and cloth as old one is full of woodworm.

I am also replacing some of the valves as two have gone to air.

Station X · 3rd Mar 2021, 7:04 pm

Cutting out capacitors en masse rather than replacing them one at a time sounds like a recipe for disaster to me.

Useful repair and restoration info here:-

http://www.vintage-radio.com/repair-...ion/index.html

AmateurRepairer · 3rd Mar 2021, 8:01 pm

I have the circuit diagram. They all need to come out as Eires are the Rifas of the radio world. I could be wrong but I did it en masse in my Murphy and that’s fine?

cathoderay57 · 3rd Mar 2021, 10:12 pm

Removing components en masse runs the risk of making mistakes when soldering in replacements. It's a good idea to take detailed photos before you get the wire cutters out or make sketches, and then replace components one at a time. I agree you can generally predict that paper capacitors are going to need replacing if carrying HT or if in the AGC circuitry so I don't attempt to power up until I have replaced all of the usual suspects; I just do them one at a time making sure that the replacement wires go to the right points. Cheers, Jerry

AmateurRepairer · 3rd Mar 2021, 10:36 pm

I have taken photographs of every capacitor regardless of how insignificant they are, even down to the hunts ones.

3rd Mar 2021, 7:00 pm	#1
AmateurRepairer Pentode Join Date: Dec 2020 Location: Chesterfield, Derbyshire, UK. Posts: 138	What things need replacing on this PYE VHF 2D? I’ve done standard stuff so far, took audio pcb out as well as two transformers out for testing, took tuning capacitor out and cleaned vanes and exterior, cleaned chassis up and cut out all wax, Eire and hunts caps all for replacement. Do these sets need anything else changing? It shorted out on first power up but that was my fault I think as the mains cable was split. Any advice greatly appreciated. I’ve got to repaint dial knobs, trim and regeneration cabinet as well as make a knew baffleboard and cloth as old one is full of woodworm. I am also replacing some of the valves as two have gone to air. __________________ Working on a Murphy U198M, Marconi CR100, PYE VHF2D x2, P75A and 25C.

3rd Mar 2021, 7:04 pm	#2
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,288	Re: What things need replacing on this PYE VHF 2D? Cutting out capacitors en masse rather than replacing them one at a time sounds like a recipe for disaster to me. Useful repair and restoration info here:- http://www.vintage-radio.com/repair-...ion/index.html __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

3rd Mar 2021, 8:01 pm	#3
AmateurRepairer Pentode Join Date: Dec 2020 Location: Chesterfield, Derbyshire, UK. Posts: 138	Re: What things need replacing on this PYE VHF 2D? I have the circuit diagram. They all need to come out as Eires are the Rifas of the radio world. I could be wrong but I did it en masse in my Murphy and that’s fine? __________________ Working on a Murphy U198M, Marconi CR100, PYE VHF2D x2, P75A and 25C.

3rd Mar 2021, 10:12 pm	#4
cathoderay57 Nonode Join Date: Oct 2017 Location: Bristol, UK. Posts: 2,384	Re: What things need replacing on this PYE VHF 2D? Removing components en masse runs the risk of making mistakes when soldering in replacements. It's a good idea to take detailed photos before you get the wire cutters out or make sketches, and then replace components one at a time. I agree you can generally predict that paper capacitors are going to need replacing if carrying HT or if in the AGC circuitry so I don't attempt to power up until I have replaced all of the usual suspects; I just do them one at a time making sure that the replacement wires go to the right points. Cheers, Jerry

3rd Mar 2021, 10:36 pm	#5
AmateurRepairer Pentode Join Date: Dec 2020 Location: Chesterfield, Derbyshire, UK. Posts: 138	Re: What things need replacing on this PYE VHF 2D? I have taken photographs of every capacitor regardless of how insignificant they are, even down to the hunts ones. __________________ Working on a Murphy U198M, Marconi CR100, PYE VHF2D x2, P75A and 25C.