Rediffusion Mk4A Tripler - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

kens999 · 3rd Sep 2015, 6:19 pm

I have always kept the beam current modest on this TV

Oddly enough, even though it was showing that test card for half an hour while I faffed about with the camera and exposures , it did not show the characteristic colour distortion due to shadow mask heating.

I have MythTV system and this TV is connected via composite to a WDTVlive box that connects to MythTV and produces a PAL output. This set makes a very good job of showing 1080p material that the WD live can transcode to PAL. This TV can even show iPlayer that way. Something the original developers never had in mind.

Ken

Leon Crampin · 3rd Sep 2015, 6:56 pm

Erm - no we didn't.

Leon (ex Rediffusion).

kens999 · 3rd Sep 2015, 7:50 pm

No we didn't - also ex-Combe

kens999 · 4th Sep 2015, 12:42 pm

If anyone is interested the full res image of the test card is here http://www.kensnet.org/IMG_1044.JPG

Ken

Nickthedentist · 6th Sep 2015, 7:02 pm

Impressive, Ken.

I've had several of these Mk4 sets through my hands over the years, but not one had a good tube, sadly.

N.

Leon Crampin · 7th Sep 2015, 5:49 pm

Videocolor tubes good, ITT tubes useless in my experience, I'm afraid.

ITT were the second source and these tubes tended to be fitted to the basic (non text) sets whereas the CITAC/text sets generally got the better tubes.

Leon.

3rd Sep 2015, 6:19 pm	#21
kens999 Retired Dormant Member Join Date: Jul 2015 Location: Croydon, London, UK. Posts: 10	Re: Rediffusion Mk4A Tripler I have always kept the beam current modest on this TV Oddly enough, even though it was showing that test card for half an hour while I faffed about with the camera and exposures , it did not show the characteristic colour distortion due to shadow mask heating. I have MythTV system and this TV is connected via composite to a WDTVlive box that connects to MythTV and produces a PAL output. This set makes a very good job of showing 1080p material that the WD live can transcode to PAL. This TV can even show iPlayer that way. Something the original developers never had in mind. Ken

3rd Sep 2015, 6:56 pm	#22
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,870	Re: Rediffusion Mk4A Tripler Erm - no we didn't. Leon (ex Rediffusion).

3rd Sep 2015, 7:50 pm	#23
kens999 Retired Dormant Member Join Date: Jul 2015 Location: Croydon, London, UK. Posts: 10	Re: Rediffusion Mk4A Tripler No we didn't - also ex-Combe

4th Sep 2015, 12:42 pm	#24
kens999 Retired Dormant Member Join Date: Jul 2015 Location: Croydon, London, UK. Posts: 10	Re: Rediffusion Mk4A Tripler If anyone is interested the full res image of the test card is here http://www.kensnet.org/IMG_1044.JPG Ken

6th Sep 2015, 7:02 pm	#25
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,844	Re: Rediffusion Mk4A Tripler Impressive, Ken. I've had several of these Mk4 sets through my hands over the years, but not one had a good tube, sadly. N.

7th Sep 2015, 5:49 pm	#26
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,870	Re: Rediffusion Mk4A Tripler Videocolor tubes good, ITT tubes useless in my experience, I'm afraid. ITT were the second source and these tubes tended to be fitted to the basic (non text) sets whereas the CITAC/text sets generally got the better tubes. Leon.