Derren

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derren
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Liked Forum Posts

RE: RGD Deep 17.

Yesterday the focus magnet and MW43-80Z CRT was fitted on the Deep17 chassis. Excellent results. Note the CRT does not use an ion trap. Attachment : RGD_Deep17A_MW43_80Z.jpg Till Eulenspiegel.

In forum Black & White Television

1 year ago
RE: 1959 Stella ST1007U

The original CRT was never very good in this set. Today, a replacement AW43-80 was fitted. The tube was removed from an RGD Deep17 C which is the console cabinet version of the popular table receiver...

In forum Black & White Television

1 year ago
RE: Philips 21TG100U Line timbase fault.

Hi Derren, it's not good news. The transformer was allowed twelve hours of warm up time but after reconnecting the valve top caps the results are just the same, no EHT and the PL81 is glowing red hot....

In forum Black & White Television

2 years ago
RE: Philips 21TG100U Line timbase fault.

Some LOPT's are a real pain in the overwind. I feel for you.

In forum Black & White Television

2 years ago
RE: 1959 Stella ST1007U

Many of the preset controls at the rear of the chassis have gone high in value, for example the line hold control should be 250Kohms. It's value had risen to almost 1Megohm. This is the reason why the...

In forum Black & White Television

2 years ago
RE: 1959 Stella ST1007U

That's a bit better, a much brighter picture now. Gave the tube a tickle with the Muter BMR90 CRT reactivator. Heater voltage between pins 1 and 12 is 6.25V. Till Eulenspiegel. Attachment : S...

In forum Black & White Television

2 years ago
RE: Bush TV135LU

I should have posted this video earlier instead, a bit more in keeping with the theme....

In forum Black & White Television

4 years ago
RE: 1959 Stella ST1007U

News Flash! Powered up the Stella today without the CRT. After a bit of fiddling about with the line timebase we have a very healthy spark at the EHT connector. I reckon there's 15KV there. The line o...

In forum Black & White Television

2 years ago
RE: Dynatron TV27 "Fulmer"

The replacement valveholder is now fully wired up and the frame timebase returned to working order. The "new" CRT displays a good bright picture. The existing focus control works well with the tet...

In forum Black & White Television

2 years ago
RE: Dynatron TV27 "Fulmer"

According to the coverage maps for Holme Moss Channel 2, Northallerton is on the edge of the 1 mV/m and Durham is outside of the 100 microV/m area but still in the shaded area classed as fringe. Morpe...

In forum Black & White Television

3 years ago
RE: Dynatron TV27 "Fulmar"

The failure of the connections inside the CRT base was common enough on USA CRT’s that a company made a special crimping tool for the job. Also some CRT makers altered the shape of the pins to allow m...

In forum Black & White Television

3 years ago
RE: Dynatron TV27 "Fulmar"

Hi Derren, I'm not giving up with this tube yet. It did light up this morning displaying a bright raster and then faded away again. There could be a bad connection inside the base so before the tube ...

In forum Black & White Television

3 years ago
RE: Ekco TMB for sale

I put my location in the “about me” section of my profile.

In forum Items for Sale, Wanted, Swaps or F.O.C.

3 years ago
RE: Ekco TMB272 Mains-Battery TV

Last time I had one of these on the bench must be 50 years ago, all I remember it was an excellent performer. No idea what the fault was now. I replaced a lot of disintegrated line output transformers...

In forum Black & White Television

3 years ago
RE: Ekco TMB272 Mains-Battery TV

These are very good little sets, I consider my one to be my best 405 set, I used it to test my 2 Hedghog’s when I built them too. Once all the caps in the frame stages are replaced it should be possib...

In forum Black & White Television

3 years ago
RE: Ekco TMB272 Mains-Battery TV

Hi Derren, it's possible that the line output transformer is the original part and perhaps only the Perspex housing was replaced after the original had disintegrated as most did in 1950s Ekco TV sets....

In forum Black & White Television

3 years ago
RE: Yet another Sony 9-306UB.

From the Radiomuseum, the RGD version of the Regentone Ten-4. Till Eulenspiegel.

In forum Black & White Television

3 years ago
RE: Yet another Sony 9-306UB.

Posted by: Derren ... first time we brought it into the house the handle came away and it went crashing down onto a concrete pavement! Needed quite a bit of case repair so great to see how it works ...

In forum Black & White Television

3 years ago
RE: Another Sony 9-306UB.

Hi Derren, more work done to the Sony TV today. I noticed that the frame linearity control was varying the height of the picture but hardly any effect to the linearity. Check 5mfd capacitor C705, it...

In forum Black & White Television

3 years ago
Is Your Stash Out of Control?

Is that a question you ask yourself occasionally, frequently or do you have your head buried in a bucket? I thought this might be good thread therapy for the folk among us that have, lets say collecte...

In forum General Technical Discussion

3 years ago
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