Pye Fenman 2 - UK Vintage Radio Repair and Restoration Discussion Forum

spikey53 · 8th Feb 2017, 9:02 pm

Has anybody had problems with the FM tuner on this set? I have tried all the usual lines of approach, valves changed, voltages and component values but still dead. The AM side works perfectly, any thoughts?

Nuvistor · 8th Feb 2017, 9:41 pm

Have you confirmed it's the tuner and not a fault in the IF or detector?

Frank

Boater Sam · 9th Feb 2017, 2:27 pm

Open circuit FM IF transformer?

Nuvistor · 9th Feb 2017, 2:44 pm

Certainly the secondary of the ratio detector could cause the fault. An OC winding in the other transformers would I think cause AM problems, but I have not had chance to check the circuit.

My original question was brought about by the poster not being explicit on having tested the IF and detector, perhaps it has been tested, I just did not know.

Frank

spikey53 · 11th Feb 2017, 12:51 pm

Thanks for the various suggestions, these will all be checked as soon as the shed is a bit warmer. It seemed that the FM oscillator was not working, when putting the 'scope on the anode there was nothing but it was drawing the correct current.
Robert

Nuvistor · 11th Feb 2017, 2:43 pm

Presume your scope can measure approx 85MHz (some can, many can't) and also confirm putting the scope on the anode doesn't stop the oscillator?
Frank

spikey53 · 16th Feb 2017, 10:00 pm

Finally had to admit defeat on this one and return it to the owner after trying all of your suggestions and getting nowhere. Thanks for trying, Robert.

spikey53 · 6th Mar 2017, 11:24 am

The owner has now asked the question I was dreading ie. is there someone I can pay to repair it? I have tried Mike Barker without success, so does anybody have any suggestions? The set is in Aldershot, Hants. Robert.

Station X · 6th Mar 2017, 12:25 pm

Try posting in the "Repair and Restoration Services Wanted" section.

8th Feb 2017, 9:02 pm	#1
spikey53 Diode Join Date: Feb 2017 Location: Farnham, Surrey, UK. Posts: 6	Pye Fenman 2 Has anybody had problems with the FM tuner on this set? I have tried all the usual lines of approach, valves changed, voltages and component values but still dead. The AM side works perfectly, any thoughts?

8th Feb 2017, 9:41 pm	#2
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Pye Fenman 2 Have you confirmed it's the tuner and not a fault in the IF or detector? Frank

9th Feb 2017, 2:27 pm	#3
Boater Sam Banned Join Date: Dec 2013 Location: Middlewich, Cheshire, UK. & Winter in the Philippines. Posts: 3,897	Re: Pye Fenman 2 Open circuit FM IF transformer?

9th Feb 2017, 2:44 pm	#4
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Pye Fenman 2 Certainly the secondary of the ratio detector could cause the fault. An OC winding in the other transformers would I think cause AM problems, but I have not had chance to check the circuit. My original question was brought about by the poster not being explicit on having tested the IF and detector, perhaps it has been tested, I just did not know. Frank

11th Feb 2017, 12:51 pm	#5
spikey53 Diode Join Date: Feb 2017 Location: Farnham, Surrey, UK. Posts: 6	Re: Pye Fenman 2 Thanks for the various suggestions, these will all be checked as soon as the shed is a bit warmer. It seemed that the FM oscillator was not working, when putting the 'scope on the anode there was nothing but it was drawing the correct current. Robert

11th Feb 2017, 2:43 pm	#6
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Pye Fenman 2 Presume your scope can measure approx 85MHz (some can, many can't) and also confirm putting the scope on the anode doesn't stop the oscillator? Frank

16th Feb 2017, 10:00 pm	#7
spikey53 Diode Join Date: Feb 2017 Location: Farnham, Surrey, UK. Posts: 6	Re: Pye Fenman 2 Finally had to admit defeat on this one and return it to the owner after trying all of your suggestions and getting nowhere. Thanks for trying, Robert.

6th Mar 2017, 11:24 am	#8
spikey53 Diode Join Date: Feb 2017 Location: Farnham, Surrey, UK. Posts: 6	Re: Pye Fenman 2 The owner has now asked the question I was dreading ie. is there someone I can pay to repair it? I have tried Mike Barker without success, so does anybody have any suggestions? The set is in Aldershot, Hants. Robert.

6th Mar 2017, 12:25 pm	#9
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Pye Fenman 2 Try posting in the "Repair and Restoration Services Wanted" section. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.