#16
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I was still seeing the Thorn 4000 chassis better known as the 4KA and marketed under the AWA & some Thorn badged sets in the late 80's & into the early 90's as not many service techs in my town I living in at the time didn't want to touch them as they were considered very unreliable.
A lot them the CRT's chopped out by this stage of the game & the thick film modules used in that chassis had a high failure rate & became NLA by this time. I still have the training manual for this chassis I got & scanned if this is of any help if you should come across one of these chassis's. Last edited by daro; 01-01-2010 at 07:16 AM. Reason: Spelling corrections |
#17
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Funny you should mention about the K9 slider controls, I did have an overseas K9 that had up/down sliders and it had a live chassis, where as our K9's were isolated, so it may have been an Australian set, and it gave a fantastic picture, I'm not sure what happened to that set, it was a long time ago The Thorn 4000 series I have never heard of, we had the 9000 series here and they were also bit unreliable the CRT's always went bad. The chassis slid out on two rails and it had three boards which swung out/lifted up and it had that weird cyclops power supply/line stage setup. The larger sets had Toshiba CRTs and they did produce a pretty good picture, just that chassis let them down. I haven't seen a 9000 series set for quite some time, most of them will be long gone now. G.
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#18
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Daro - Thanks for the kind offer for a scan of the manual but that won't be necessary. I'm lucky to have a full set of manuals for this chassis. If you happen to find a chassis in your travels, I'd be very interested in having it.
Glen - The Thorn 4000 (4KA) proved so unreliable in Australia that AWA-Thorn started to use imported Mitsubishi chassis for all their TV's from around 1976 on. We missed out on the later English Thorn models. The Australian Philips K9 had a earthed chassis with a isolated switchmode power supply. Your live chassis K9 must have been a European import. Did your Pyes use T series chassis numbers? The last black and white sets here used a T27 chassis. The first colour chassis was the T29. It underwent some revisions for a couple of years and then Pye switched to using Philips chassis (KT2, KT3 and KL9) until they were shut down along with Kriesler around 1980/1981. |
#19
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For us vintage TV collectors, it's worth noting that in 1931, the Canadian Government also granted Edward Rogers the first television broadcasting license in Canada. Rogers passed away in 1939, at the age of 39. It's sad news and yet, think what more he may have accomplished if he had lived! Since Canada's constitution was not repatriated until 1981, prior to this Canada, a Commonwealth country, was officially a Dominion of Great Britain, the "Crown". Countries part of the Commonwealth also have special trade relationships. Canadian Business and Patent law would trace back to British Law; which, if I understand correctly, would make it possible for another dominion, like New Zealand, to license the Rogers or Majestic brand names. Although I'm sure of the legal implications, the appearance of these brands in NZ make sense given their relation ship with the Crown. |
#20
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Our colour Pye sets started from CT101,102,103 and so on. Some of the later Pyes like your ones also used the KT3/KL9 and even the Philips CTO chassis right up until the late 1980's so the Pye name must have carried on a bit longer here than in Australia... G.
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Audiokarma |
#21
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#22
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Here is a rather belated update on the Majestic set as mentioned in the first post in this thread, I actually finished the set electronically about a year ago! Don't know where that time has gone, having a two year old boy certainly makes you change your time management....
So to continue on where I left off.... It was a fairly straight forward process after I had replaced the crook sync discriminator diodes that were causing some problems with the horizontal side of things, I went through and replaced all the capacitors and replaced the filter/power supply caps and fitted some new rectifier diodes with 1N4007's. Checked most of the resistors and replaced some that were a bit out, but the majority of them tested ok and still within tolerance which was good. Also had to replace the vertical height and linearity pots as one had a dead spot and the other was open circuit and I seem to recall there was some other problem with the vertical section which needed fixing. Tested all the valves and found a couple that were a bit off but all the others apart from the valves I had to replace initially checked ok. Adjusted picture geometry to best as possible. So overall quite happy with way its been going and have been using it to watch DVD's mainly. Although one night it gave me a scare, I watching something on it and started noticing the picture slowly getting larger.... then it started blooming followed by an arcing noise then it vanished! I jumped up and dived around the back thinking the worst like the line output transformer had just failed but luckily it was only the EY88 boost tube which had decided to go to air while in use, so another one in its place and we had a nice crisp stable picture again! I've included some photos taken a couple of days ago of the finished result and a photo of the small pile of parts that were replaced. BTW the image shown is from an episode of UFO 1970's sci-fi series. I learned recently from an old tv tech that the circuitry in this was based on a Philco?....Interesting
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#23
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I don't often look in this forum .. sticking mainly to the early color set forum... but to see that K9 makes my heart go BUMP... the first K9s in OZ had rotary tuners and horizontal sliders.
I know because I had one ... the K9s were also rebranded as Kriesler in different cabinets. I have the brochures still with the original K9 models. In fact is have a large collection of color tv brochures from 1975/76. (My avatar comes from a 1975 Philips brochure).
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#24
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The K9's were a lovely chassis, I have several different models in varying operational condition. The Krieslers were not just a rebrand of Philips, they were a unique chassis based on the K9 but actually had quite a few changes made by Kriesler Engineers.
I'm actually in the process of researching the different TV models that were around in the 1975/76 period. I have managed to find a few old brochures but someone seems to want the ones that occaisonally turn up for sale a lot more than me. That wouldn't happen to be you by any chance? I'm also near Melbourne. It would be nice to visit one day and compare notes. |
#25
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Andrew mate ..no I have not been chasing brochures ..I have far too many as it is!!!
I have occasionally thought about scanning them but never thought anyone would be even slightly interested. I collected at the time ... I have a series of wonderful Kreisler ones ..one that shows the full chassis....in a massive foldout brochure. We should at least have a chat and I do need to find a home for my KV1800AS at some stage...
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Audiokarma |
#26
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Do you have any the sales brochures for the early PYE color TV's from 1975, the first brochures from PYE had a close up picture of a PYE TV on the front with simulated picture of an Olympic snow skier on the screen. Seriously there is nothing out there in cyberspace, not even photographs of the T29, T30, T34 and T36 based PYE color television to be had anywhere. :'( Our first color TV which we got in January of '75 was a PYE 22A3 using the T29 chassis which 11 years later I would cut my teeth repairing by the score when I entered the television repair trade myself. Last edited by daro; 03-25-2017 at 08:49 PM. |
#27
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Pye....yep
Daro,
Yes i HAD the Pye brochures....remember the Pye sets very well .... I have given the brochures to a good mate from here... I am sure we can get them scanned for you somehow... chris
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#28
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Sounds good to me.
I've got a lot of the old JR publications service manuals from the 1960's to about the mid 70's when color TV came out |
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