Quiz time!! no audio on VT17 Pye - UK Vintage Radio Repair and Restoration Discussion Forum

murphyv310 · 26th Nov 2009, 9:01 pm

Hi
I remember being told this story from my old foreman in Clydesdale years ago and wonder if any can think what was the caus of the problem.

The lady of the house called in to say her rental Pye VT17 had been loosing sound for a week and now had none.
The engineer (name can be supplied) went out to the lady who stayed in Govan, Glasgow. Sure enough there was no sound, the PCL83 was replaced and the voltages checked, the output transformer and speaker speech coil were checked as OK, but still no sound, there was no buzz when touching the grid of the triode. At this point the engineer was pulling his hair out, eventually the set was lifted to the workshop and a loan left.
It was an easy job for the bench engineer though.
What was the fault?
Trevor

Steve_P · 26th Nov 2009, 9:14 pm

Well, if the volts on the valve are OK and the connections to the speakers are OK, then maybe R130? (Part numbers on Trader Sheet 1214).

Cheers,

Steve P.

murphyv310 · 26th Nov 2009, 9:16 pm

Hi Steve
All OK here, think again!
Trevor

YT2095UK · 26th Nov 2009, 9:33 pm

a broken wire inside the insulation?
a Mechanical fault at the speaker cone?

murphyv310 · 26th Nov 2009, 9:47 pm

YT.
On your second line you are getting warm.
Trevor

PS what's your christian name?

Sean Williams · 26th Nov 2009, 9:53 pm

Speaker plug faulty?

wave solder · 26th Nov 2009, 9:55 pm

Speaker speech coil detached from cone?

murphyv310 · 26th Nov 2009, 10:00 pm

Hi
Getting very close, if so why?
Trevor

Simon Gittins · 26th Nov 2009, 10:17 pm

Speaker cone eaten by mice?

Steve_P · 26th Nov 2009, 10:23 pm

Deaf member of the house kept the sound up full for long periods?

Cheers,

Steve P.

murphyv310 · 26th Nov 2009, 10:41 pm

Quote:

Originally Posted by Simon Gittins

Speaker cone eaten by mice?

Well done Simon.
The house was really dark with only one 40w bulb so "Jimmy" couldn't really see the cone or the mouse droppings. The back was off though which was a way in for the little rodent. The following day on the bench the "fault" could be seen right away. He got stick for it for years untill he died in 2000.
Award yourself a gold star.
Cheers
Trevor

Simon Gittins · 26th Nov 2009, 10:56 pm

Amazing! I'm sure I have read about mice eating cones but I can't remember where. Thanks for keeping us guessing.

Simon.

26th Nov 2009, 9:01 pm	#1
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,422	Quiz time!! no audio on VT17 Pye Hi I remember being told this story from my old foreman in Clydesdale years ago and wonder if any can think what was the caus of the problem. The lady of the house called in to say her rental Pye VT17 had been loosing sound for a week and now had none. The engineer (name can be supplied) went out to the lady who stayed in Govan, Glasgow. Sure enough there was no sound, the PCL83 was replaced and the voltages checked, the output transformer and speaker speech coil were checked as OK, but still no sound, there was no buzz when touching the grid of the triode. At this point the engineer was pulling his hair out, eventually the set was lifted to the workshop and a loan left. It was an easy job for the bench engineer though. What was the fault? Trevor __________________ Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member

26th Nov 2009, 9:14 pm	#2
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Quiz time!! no audio on VT17 Pye Well, if the volts on the valve are OK and the connections to the speakers are OK, then maybe R130? (Part numbers on Trader Sheet 1214). Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

26th Nov 2009, 9:16 pm	#3
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,422	Re: Quiz time!! no audio on VT17 Pye Hi Steve All OK here, think again! Trevor __________________ Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member

26th Nov 2009, 9:33 pm	#4
YT2095UK Retired Dormant Member Join Date: Sep 2009 Posts: 487	Re: Quiz time!! no audio on VT17 Pye a broken wire inside the insulation? a Mechanical fault at the speaker cone?

26th Nov 2009, 9:47 pm	#5
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,422	Re: Quiz time!! no audio on VT17 Pye YT. On your second line you are getting warm. Trevor PS what's your christian name? __________________ Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member

26th Nov 2009, 9:53 pm	#6
Sean Williams Dekatron Join Date: Feb 2005 Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW Posts: 3,518	Re: Quiz time!! no audio on VT17 Pye Speaker plug faulty? __________________ Engineers make things work and have spare bits when finished

26th Nov 2009, 9:55 pm	#7
wave solder Hexode Join Date: Feb 2007 Location: Chesterfield, Derbyshire, UK. Posts: 483	Re: Quiz time!! no audio on VT17 Pye Speaker speech coil detached from cone?

26th Nov 2009, 10:00 pm	#8
murphyv310 Dekatron Join Date: Sep 2006 Location: Kilmarnock, Ayrshire, UK. Posts: 5,422	Re: Quiz time!! no audio on VT17 Pye Hi Getting very close, if so why? Trevor __________________ Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member

26th Nov 2009, 10:17 pm	#9
Simon Gittins Heptode Join Date: Jan 2006 Location: Cornwall, UK. Posts: 506	Re: Quiz time!! no audio on VT17 Pye Speaker cone eaten by mice?

26th Nov 2009, 10:23 pm	#10
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Quiz time!! no audio on VT17 Pye Deaf member of the house kept the sound up full for long periods? Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

26th Nov 2009, 10:56 pm	#12
Simon Gittins Heptode Join Date: Jan 2006 Location: Cornwall, UK. Posts: 506	Re: Quiz time!! no audio on VT17 Pye Amazing! I'm sure I have read about mice eating cones but I can't remember where. Thanks for keeping us guessing. Simon.