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Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
1971 Bush CTV1120
RGD Deep 17.
Posted by: @katie-bushI guess the real acid test will be in how many switch on cycles it can withstand. Probably a million reasons why not, but, would it be possible to snub the surge with addition of, say, a PTC device of some kind, across the heater?
Hi Marion, the heaters are very well controlled by the Mullard VA1026 thermistor at the top of the heater chain. As for the failure of the tube we'll put it down to simply bad luck. I was always extolling the merits of the AW43-80 but now I'm not so sure.
Till Eulenspiegel.
ETF in Hilliard Ohio have a 17ATP4 that should suit. You will have to change the heater arrangements tho.
Today. The Deep17A chassis is now on the bench to receive a replacement CRT. But first the old CRT must be removed, but that's not going to be easy, the tube is stuck fast on it's mounts. Seems like those cork composition pads are well and truly stuck to the metal parts and the CRT glass bowl.
Can't use too force because there's danger of implosion, the AW43-80 is tough little tube I'm sure but why take chances on a scrap tube? Or any tube for that matter! A much better plan will be to take the tube down to air by drilling a tiny hole through the end of the base, the method employed by tube regunning firms.
So I'm off to the workshop right to do that task so that the tube will be ready for removal tomorrow. Then, I can use as much force as is necessary to take tube out.
Till Eulenspiegel.
A flat bladed knife gently pushed between the glass and cork may be enough to seperate said items, but you probably know that well enough anyway. ?
Be a pity to break up the cork and end up having to use something else to replace it.
To understand the black art of electronics is to understand witchcraft. Andrew.
Hi Andrew, I've applied RS Components switch cleaner to soften up the cork just because it was close to hand. Anyway, I'll be in the workshop soon so we'll see how things progress.
Till Eulenspiegel.
Tube is down to air. That's it, I'm out of here. Get back home now.
The CRT was made safe.
Fitted the tube that was in the Stella ST1007U. It looks bright but in fact the picture is dim, just like it was in the Stella.
The MW43-80Z will be used. A focus magnet is required with this tube.
Till Eulenspiegel
Mullard CRTs MW43-69, MW43-80 and MW53-80 have pentode guns and I assume it is the same with the non ion-trap MW43-80Z.
From the Mullard Maintenance Manual:Prefocussing; The spot size and uniformity of focus depends upon Va2 Va2 at zero or negative with respect to the cathode the spot size at the centre of the screen and width of the electron beam are such that the optimum uniformity of focus is obtained over the whole of the screen. If Va2 is increased, the spot size at the centre is reduced but the width of the electron beam in increased, resulting in inferior focus at the edge of the screen. With increased Va2 the power of the focus magnet has to be increased.
MW43-80 A2 is pin 7 whereas the focus electrode in the AW43-80 is pin 6. Va2 is connected to the the cathode, pin 11.
Till Eulenspiegel.
Amazing sets with as you say very reliable. They are simple designs with a low component count which no doubt aids reliability.
Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
An export version of the RGD Deep17? Found this magazine on ebay France. It'll be interesting to read the comments about the set.
Till Eulenspiegel.
It's not an 819 line version of the RGD Deep17. The illustration simply depicts an example of current UK TV set manufacturing, although it's safe to suggest by 1960 the Deep17 will have been superseded by slim models with 110* CRTs.
Till Eulenspiegel.
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