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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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21st Oct 2020, 2:17 pm | #1 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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 |
21st Oct 2020, 3:32 pm | #2 |
Hexode
Join Date: Feb 2011
Location: Gloucestershire, UK.
Posts: 376
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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.
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21st Oct 2020, 8:32 pm | #3 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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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. |
21st Oct 2020, 8:44 pm | #4 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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. |
24th Oct 2020, 1:56 pm | #5 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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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. |
24th Oct 2020, 9:04 pm | #6 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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. |
19th Mar 2021, 10:55 pm | #7 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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 ! |
24th Mar 2021, 11:47 am | #8 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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. |
24th Mar 2021, 1:11 pm | #9 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
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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.
Last edited by Heatercathodeshort; 24th Mar 2021 at 1:17 pm. |
24th Mar 2021, 1:29 pm | #10 |
Nonode
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
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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. |