Pye Piper (P116U) knobs. - UK Vintage Radio Repair and Restoration Discussion Forum

Darren-UK · 8th Apr 2006, 9:21 pm

I've owned this little chap for some time but today decided to dig it out and give it a much needed clean and to let it run for a while.

What I wish to know concerns the on/off/vol knob. Did these ever have a marker line on them ( like the red and black ones on the wavechanger ) ? From what pics I can find, including within this website, it appears not - so I'm assuming my radio (pic attached) is as it was originally.

mickjjo · 8th Apr 2006, 9:31 pm

Hi Darren, I have one of these sets and there are no signs of any markings on the on/off/volume knob, just the wavechange knob. Looks exactly like yours, so I would think this is correct

.

Regards, Mick.

Paul Stenning · 8th Apr 2006, 9:56 pm

I agree with Mick. The one I had had no lines on the volume knob either.

Steve_P · 8th Apr 2006, 10:17 pm

How does the tuning knob work on these? Mine was bodged up with glue!

Paul Stenning · 8th Apr 2006, 10:54 pm

There's no reduction drive - the knob in the middle is just fixed to the large clear one. So the middle knob serves no useful purpose.

Darren-UK · 8th Apr 2006, 11:01 pm

Quote:

Originally Posted by Steve_P

How does the tuning knob work on these? Mine was bodged up with glue!

The shaft is ¼" diameter and with no flat (ie not D cross section). Over this sits a coil spring. The tuning 'dial' fits on the shaft and should push back against the spring. In the centre of the dial either side of the shaft hole and at 180deg to each other are two rectangular lugs. These lugs are integral (ie part of the perspex dial moulding) and these lugs engage with two slots in the reverse of the tuning knob. The aforementioned spring ensures the ensemble remains mated. The knob then locks onto the shaft via the usual grubscrew arrangement.

If the grubscrew is overtightened the knob will split, but if it's undertightened the dial will continue to turn on the shaft when the tuning hits the end of its travel

.

I presume this arrangement applies to both the P115U and P116U; the latter using a tuning gang and the former, I believe, using permeability tuning.

(Paul) The idea of the central tuning knob and the outer raised rim of the perspex dial/wheel is, supposedly, to give rapid tuning via the knob and fine tuning via the outer rim - such as you can 'fine tune' with direct drive.

8th Apr 2006, 9:21 pm	#1
Darren-UK Retired Dormant Member Join Date: Apr 2003 Location: Blackpool, Lancashire, UK. Posts: 4,061	Pye Piper (P116U) knobs. I've owned this little chap for some time but today decided to dig it out and give it a much needed clean and to let it run for a while. What I wish to know concerns the on/off/vol knob. Did these ever have a marker line on them ( like the red and black ones on the wavechanger ) ? From what pics I can find, including within this website, it appears not - so I'm assuming my radio (pic attached) is as it was originally. Attached Thumbnails

8th Apr 2006, 9:31 pm	#2
mickjjo Rest in Peace Join Date: Jul 2004 Location: Dartford, Kent, UK. Posts: 1,661	Re: Pye Piper (P116U) knobs. Hi Darren, I have one of these sets and there are no signs of any markings on the on/off/volume knob, just the wavechange knob. Looks exactly like yours, so I would think this is correct . Regards, Mick.

8th Apr 2006, 9:56 pm	#3
Paul Stenning Administrator Join Date: Dec 2002 Location: Cardiff Posts: 9,071	Re: Pye Piper (P116U) knobs. I agree with Mick. The one I had had no lines on the volume knob either. __________________ Paul Stenning Forum Admin/Owner and BVWS Webmaster

8th Apr 2006, 10:17 pm	#4
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Pye Piper (P116U) knobs. How does the tuning knob work on these? Mine was bodged up with glue! __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

8th Apr 2006, 10:54 pm	#5
Paul Stenning Administrator Join Date: Dec 2002 Location: Cardiff Posts: 9,071	Re: Pye Piper (P116U) knobs. There's no reduction drive - the knob in the middle is just fixed to the large clear one. So the middle knob serves no useful purpose. __________________ Paul Stenning Forum Admin/Owner and BVWS Webmaster