UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Television and Video

Notices

Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

Closed Thread
 
Thread Tools
Old 21st Oct 2020, 2:17 pm   #1
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default GEC 2014 19" dual standard.

It's many a year since I've seen one of these. This one has only the
remnants of the CZ25 HT thermistor.
I'm wondering if anyone could provide a picture of the linkage between the
VHF tuner and the systems switch as it's missing. I can use a bit of welding
rod but I am not sure how it is retained and where it attaches to the cam
at rear of tuner.
This chassis has many similarities with the BRC900 chassis. TIA
Restoration73 is offline  
Old 21st Oct 2020, 3:32 pm   #2
Andy Doz
Hexode
 
Andy Doz's Avatar
 
Join Date: Feb 2011
Location: Gloucestershire, UK.
Posts: 376
Default Re: GEC 2014 19" dual standard.

Is it similar to the 2028 system switch... I had to second guess mine. Happy to share pictures if it's any use.
__________________
andydoz.blogspot.com
Andy Doz is offline  
Old 21st Oct 2020, 8:32 pm   #3
Heatercathodeshort
Dekatron
 
Heatercathodeshort's Avatar
 
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: GEC 2014 19" dual standard.

It's a length of very stiff wire rod bent to to pass through a black plastic cam on the system switch. It is retained by what looks like a single socket from an octal valve holder.

The tuner end passes through a bush with a retaining screw that is a loose fit in the tuner cam. It's very similar to the 2028 as Tony advised. I have a 2014 in the loft but I can't get it down till Saturday.

I will take some pics for you. Regards, John.
Heatercathodeshort is offline  
Old 21st Oct 2020, 8:44 pm   #4
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default Re: GEC 2014 19" dual standard.

Thanks John and Andy. Unlike the 50's GEC manuals, the 60's ones have not many
illustrations. I suppose I'm lucky the switch operates. This one has the usual 13 position
vhf tuner with U position, but later monos have either a 5-way vhf tuner or a 6 button
integrated tuner. A47-14W with Fenbridge guard.
Restoration73 is offline  
Old 24th Oct 2020, 1:56 pm   #5
Heatercathodeshort
Dekatron
 
Heatercathodeshort's Avatar
 
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: GEC 2014 19" dual standard.

The Sobell from the loft worked so well on 405 it seemed a pity not to have the 625 functional. I removed the soldered up section of the system switch and with care managed to clean away the solder and generally reset the contacts for smooth operation. I refitted the switch and a manual test proved it was ok.

Thankfully the I.F. switch had not been soldered.

I made up a link rod using mild steel wire/rod wound and soldered at a couple of points with copper wire to prevent bending of the rod when changing systems. Not very pretty but it is very functional. wrapped in heat shrink it passes.

If you would like a length of the rod I can send you a small coil in an ordinary envelope. You may of course have something suitable.

The performance of these Sobell dual standard receivers is very good indeed.
Regards, John.
Attached Thumbnails
Click image for larger version

Name:	Sobell Sw.  (1).jpg
Views:	271
Size:	44.4 KB
ID:	218784   Click image for larger version

Name:	Sobell Sw.  (2).jpg
Views:	262
Size:	45.6 KB
ID:	218785  
Heatercathodeshort is offline  
Old 24th Oct 2020, 9:04 pm   #6
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default Re: GEC 2014 19" dual standard.

Thanks for the picture John. I can easily make a linkage up. Of course after I posted I
found I had the 2017 manual which shows this. That set has an additional tuner cam to
operate the TV/FM switch (simpler than the switch on the BRC900 with FM radio.)
The only other problem is the inductor mounted on the lopt has jumped in transit
spilling its turns from one end. Fortunately the wire isn't thin.
Restoration73 is offline  
Old 19th Mar 2021, 10:55 pm   #7
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default Re: GEC 2014 19" dual standard.

I had to put this on hold however upon replacing the ht thermistor and dropper I have
been rewarded with a set that is basically working, with the usual attention needed for
the field o/p stage and any dud capacitors etc. This one has the Mullard VHf turret tuner.
The Fenbridge guard is a bit scratched although I have polished the worst. The only
problem is can see is there is some dust between the plastic and the crt glass. I can't
believe they left the factory like that !
Restoration73 is offline  
Old 24th Mar 2021, 11:47 am   #8
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default Re: GEC 2014 19" dual standard.

Good progress was made with this set (actually a Sobell 1014) as usual LLJ's
articles in June/July 1970 Television were helpful.
As is usual with sets of this vintage many pcb carbon composition resistors
had significantly increased in value;
Sound - R96 (PCL84 cathode)
Field - R103,104,105,107,108,111 and C154 (PCL805 cathode) dried
Line - R129,132,133,134, and the 1M set boost preset.
I replace the HT dropper with 47 ohm ally clad 25W
I made up the missing systems linkage with some 3mm Sifbronze rod (shown)
Pictures display 405 (actually sharper than this - just about see 3.5Mc/s)
625 - actually showing a Region 1 DVD - seems a bit noisy to me.
The cabinet needs work but otherwise this work is now complete.
Access is not as good a Thorn 900 although I have never had any problems
with the GEC double side pcbs.
Attached Thumbnails
Click image for larger version

Name:	DSCF6044.jpg
Views:	154
Size:	105.9 KB
ID:	230010   Click image for larger version

Name:	DSCF6061.jpg
Views:	180
Size:	60.1 KB
ID:	230011   Click image for larger version

Name:	DSCF6062.jpg
Views:	153
Size:	62.1 KB
ID:	230012  
Restoration73 is offline  
Old 24th Mar 2021, 1:11 pm   #9
Heatercathodeshort
Dekatron
 
Heatercathodeshort's Avatar
 
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: GEC 2014 19" dual standard.

Nice one! The tube looks like a Mullard A47-14W? It has a dark screen filter and gives a great picture. I think the tube in this one has a standard AW47-91 but it is without a label. This example is missing it's line linearity sleeve hence the stretched picture. It is almost impossible to obtain a true test card circle on these 19" tubes unless you over scan the width. The Fenbridge guard on mine has an overall light Nicotine stain. J.
Attached Thumbnails
Click image for larger version

Name:	Sobell.jpg
Views:	128
Size:	184.8 KB
ID:	230024  

Last edited by Heatercathodeshort; 24th Mar 2021 at 1:17 pm.
Heatercathodeshort is offline  
Old 24th Mar 2021, 1:29 pm   #10
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default Re: GEC 2014 19" dual standard.

Thanks John. I get the impression there is something on the glass surface which does
not interfere with the picture, but cleaning will be another day.
The steel strut is a poor heatsink for the ht resistor so I will insert an ally plate to aid
with heat conduction. I have positioned the thermistor on a tagstrip above the strut.
All the other caps were fine,I did replace the 600V Dubilier mains filter as a precaution.
Many of the valves were Pinnacle, an incredibly popular replacement brand.
Restoration73 is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 4:20 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.