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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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12th May 2021, 10:05 pm | #1 |
Triode
Join Date: Sep 2006
Location: Belfast, Northern Ireland, UK.
Posts: 21
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Set ID anyone?
This is for sale locally but I'd like to know a little about it. Thanks all.
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12th May 2021, 10:31 pm | #2 |
Octode
Join Date: Apr 2005
Location: Peterborough, Cambridgeshire, UK.
Posts: 1,898
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Re: Set ID anyone?
It looks like a later version of the Bush 823 with varicap tuning. 2 chip decoder which IMHO wasn't as good as the earlier single chip version.
If you do buy it check the thermistor on the power supply panel for dry joints . They used to fail, burn a hole in the panel and because it was back to back with the decoder it could splat the back of the decoder and cause a lot of damage. The flyback tuning capacitor(s?) should probably be changed and the smoothers checked before applying power. Good luck if you do go for it! |
12th May 2021, 11:09 pm | #3 |
Heptode
Join Date: May 2006
Location: Accrington, Lancashire, UK.
Posts: 978
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Re: Set ID anyone?
Didn't they do a presentation of the Z718 with a similar cabinet?
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13th May 2021, 10:13 am | #4 |
Heptode
Join Date: Jun 2007
Location: Durham, County Durham, UK.
Posts: 640
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Re: Set ID anyone?
It's a Murphy CV2614 fitted with the A823AV chassis, relatively reliable but not a great performer. These were flying off the shelves where I worked during the colour boom days. May have been late 73 when it was released.
I can't be sure but it looks like the door over the tuning controls is still there. It was very flimsy, often got broken and the tiny spring lost. John. |
13th May 2021, 11:39 am | #5 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
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Re: Set ID anyone?
Without doubt the worst quality picture of the 1970s but as John says predictable and reliable. Customers never complained about the poor colour/general performance and it would have been a nightmare if they had! John.
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13th May 2021, 1:59 pm | #6 |
Dekatron
Join Date: Apr 2005
Location: North Wales, UK.
Posts: 6,916
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Re: Set ID anyone?
They certainly had a dull picture, especially nwhen viewed beside a G8, Thorn or even the Pye 697. I always found it a disappointment to fit a new tube and be greeted with a mediocre picture. The older one-chip decoder had the edge on performance. However it wasn't till the late Seventies with the Z718 then T2X series that RBM eventually had a set with a good picture. Odd, as the A640 and A816 monos were the best performers in their group.
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13th May 2021, 4:07 pm | #7 |
Pentode
Join Date: Jul 2010
Location: Nottingham, Nottinghamshire, UK.
Posts: 231
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Re: Set ID anyone?
Interesting you should say that Glyn. The 640, 816 and Z718 were all designed by the same team, The A823 being designed by another team. Before I left RBM, I built a frankenstein set for use at home, based on the A823, but with the signals panel from the A718 . The set worked well and only needed a new tripler and tube throughout it's long life.
Dave |
14th May 2021, 9:39 am | #8 |
Heptode
Join Date: Jun 2007
Location: Durham, County Durham, UK.
Posts: 640
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Re: Set ID anyone?
Funny you should mention your Frankenstein set Dave,I’ve had plans for a long time to us an A823 for some major rework. I have two identical Coop sets, one will be returned to life as originally designed and the other will have the decoder updated and the bouncy-bouncy thyristor PSU updated to possibly a switch mode design.
John. |