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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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13th Aug 2011, 5:42 pm | #1 |
Pentode
Join Date: Feb 2006
Location: County Durham, UK.
Posts: 234
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Itt cvc2
Hi everyone today I decided to get my CVC2 out of storage. It was plugged in via a variac and after a half an hour I started to raise the voltage. The timebases started to function then a raster appeared. I plugged the roof aerial in and all I can obtain is a very weak unlocked picture with faint sound.
This is the first time that I have ever tackled one of these sets and what a rats nest! I have mislaid my manual so would anyone please like to comment on any stock faults on this type of set? Has anyone any memory of this chassis? Regards, Gary |
13th Aug 2011, 5:48 pm | #2 |
Dekatron
Join Date: Sep 2006
Location: Kilmarnock, Ayrshire, UK.
Posts: 5,422
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Re: itt cvc2
Hi Gary.
I did the odd one when I moved from British Relay to Clydesdale. I found them to be OK to fix but it's hard to remember them that well, it was the mid 70's after all. Good Luck
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Cheers, Trevor. MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member |
13th Aug 2011, 8:38 pm | #3 |
Rest in Peace
Join Date: Jul 2006
Location: Somerset, UK.
Posts: 2,356
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Re: Itt cvc2
Is this based on the KB CVC 1 ? It looks similar with the proper chassis
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14th Aug 2011, 12:14 am | #4 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Itt cvc2
Hi Gary,
The final vision IF transistor could have failed, it's likely to be a BF197 or a BF173. I don't much about these sets having only been asked to repair two in the late 1970s. The CVC2 is a development of the dual standard CVC1. The luminance amplifier is a BD119 transistor and not the usual PL802 valve. This is the CTV that will operate in mono when the colour decoder is removed. DFWB. |
14th Jan 2014, 2:40 pm | #5 |
Triode
Join Date: Sep 2008
Location: Wiltshire, UK.
Posts: 17
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Re: Itt cvc2
Hi Gary
I saw this thread and wondered how you got on with your ITT! We sold two or three of the CVC1/2 series when I was an apprentice in the late 60's / early 70's. They were very good sets, probably the very best of those we sold at the time (Pye/Bush/Decca/Philips/Marconi). From memory, the only problems we ever had was failure of the LOP stage PL/PY valves. Strange thing is I never remember scrapping these sets and still wonder how many might have survived. 40 years on I even did a 'cold call' on the son of one original owner who had a large farmhouse...just the place to still find a large old TV squirrelled away I hoped. In fact he asked me over because "there is an old set in the attic". I couldn't wait to take a look, but disappointingly it was not a CVC1 I found, but a Decca 30 console set...presumably it was the set that had replaced the ITT. Anyway, duty calls, a Decca Deccalian and a Panasonic plasma await repair. No prizes for guessing which I prefer. Hope you and your ITT are in good shape, all best regards, Peter. Last edited by Deccatech; 14th Jan 2014 at 2:45 pm. Reason: Typo |