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Old 31st May 2019, 10:15 pm   #1
1100 man
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Default All transistor 405 line (or DS) TV's

Split from this thread: https://www.vintage-radio.net/forum/...d.php?t=155128

Was the Thorn 2000 the only solid state set produced that was capable of receiving 405 line pictures?

Last edited by AC/HL; 1st Jun 2019 at 11:33 pm. Reason: Thread split
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Old 31st May 2019, 11:09 pm   #2
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Default Re: Thorn 2000.

I was also wondering if there were any other solid state sets capable of receiving 405 lines, were any of the multi standard Sonys solid state?
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Old 1st Jun 2019, 12:22 am   #3
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Default Re: Thorn 2000.

Plenty of B/W ones. Not sure about colour.
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Old 1st Jun 2019, 9:41 am   #4
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Default Re: Thorn 2000.

Really? I can't think of any all transistor B&W sets capable of receiving 405 lines. Obviously, there were plenty with VHF tuners for foreign markets, but they were not 405. All the dual standard sets I've ever seen were hybrids or all valve sets.

I would be interested to know what models were all transistor.

All the best
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Old 1st Jun 2019, 9:55 am   #5
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Default Re: Thorn 2000.

Philips T-Vette 11TG190AT, circa 1966. All transistor, apart from the EHT rectifier. 405/625.
Perdio Portarama (Mk 1, 2 & 3). The mark 3 was 405/625.
Ferguson Transvista 743T, circa 1960. 405 only.
Pye TT1, circa 1960. 405 only.
Sony TV9-90UB. 405/625.
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Old 1st Jun 2019, 12:34 pm   #6
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Default Re: Thorn 2000.

That's interesting to know, especially as the Thorn 1500 was made well into the 1970s with some valves & some of the Eastern European sets into the 1990s.
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Old 2nd Jun 2019, 12:12 am   #7
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Default Re: All transistor 405 line (or DS) TV's

Hi Dazzlevision,
Many thanks for the information- I never knew that! All transistor 405 only sets from the early '60's must have been ground breaking!

I should have known about the Sony TV9-90UB, as I have a version of it that has video / audio inputs & outputs. I think it's designed to go with the CV2100ACE open reel video recorder. It's currently very far down the 'round to it ' list!

I would be interested to know more about the Ferguson 'Transvista' & the Pye TT1.

All the best
Nick
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Old 2nd Jun 2019, 1:01 am   #8
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Default Re: All transistor 405 line (or DS) TV's

There are 4 articles about the TT1 in PT during the 1960's. Search on Pye TT1
https://www.americanradiohistory.com...n_Magazine.htm
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Old 2nd Jun 2019, 9:04 am   #9
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Default Re: All transistor 405 line (or DS) TV's

Some late versions of the Perdio Portarama Mk2 were dual standard.

There may have been other small screen sets imported in very small numbers.
I seem to remember at least one (Crown ?)
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Old 2nd Jun 2019, 9:53 am   #10
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Default Re: All transistor 405 line (or DS) TV's

Quote:
Originally Posted by 1100 man View Post
Hi Dazzlevision,
Many thanks for the information- I never knew that! All transistor 405 only sets from the early '60's must have been ground breaking!
I can speak from experience having a Philips 11TG190 and a Perdio Portarama.

The little Perdio was the first all-transistor portable available in the UK. I have the MkII version (405 only) which gives superb results. Not the easiest of sets to work on but was indeed ground-breaking in 1962.

The Philips 11TG190 a few years later (1965 I think) gives good results on both systems although I think that 625 tends to lack 'punch' unlike 405 which is excellent.
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Old 2nd Jun 2019, 11:02 am   #11
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Default Re: All transistor 405 line (or DS) TV's

Don't forget the TELETON TA12DU. This is often confused with the TA12U. This dual standard receiver is a very good worker with electronic system switching.

The single standard 625/UHF version does not have channel 1 on the channel change knob.
John.
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Old 2nd Jun 2019, 12:52 pm   #12
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Default Re: All transistor 405 line (or DS) TV's

This one is quite rare. The 7" 405 line Ferguson 'TRANSVISTA' model 743T from 1961.
Cosmetic bits are missing including the ball ended aerials and the daylight hood that shaded the screen.

The chassis is clean and must be hoisted up the 'to do list'..John.
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Old 3rd Jun 2019, 9:59 am   #13
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Default Re: All transistor 405 line (or DS) TV's

As well as the TV9-90UB, The Sony TV9-306UB was also 405 / 625 line dual standard. There was also a 405 line only version of it made to go with the CV-2000 VTR which I can't remember the model number of (there's one at home so I can have a look). As far as I know this was the only Japanese 405 line single standard set to be sold here.
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Old 3rd Jun 2019, 10:45 am   #14
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Default Re: All transistor 405 line (or DS) TV's

I have that Sony 405 only. CVM-306BP is the model.
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Old 3rd Jun 2019, 12:48 pm   #15
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Default Re: All transistor 405 line (or DS) TV's

Announced in 1960 The Pye TT1 was on sale 1961. Unlike all the other early UK transistor TVs the TT1 has a 14" CRT. Tube is a Cathodeon C14-3A or AW36-20.
The set has an internal battery pack consisting of nine NiCad cells.

DFWB.
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Old 3rd Jun 2019, 3:04 pm   #16
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Default Re: All transistor 405 line (or DS) TV's

I had CVM9-306B, the display (monitor) section of which I converted to dual standard 405/625 line and used with my CV2000 which was very happy to work on 625 line (and any other system with 50 Hz field rate inc 819 line) - I used an outboard tuner to provide source for 625 line recordings - wish now that I had kept it , and a lot of other kit from that era as well

Rgds
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Old 3rd Jun 2019, 11:05 pm   #17
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Default Re: All transistor 405 line (or DS) TV's

Well, this has proved to be an interesting thread! Considering transistor radios only came on the market in the late '50's, I'm amazed that there seems to have been quite a few all transistor TV's in the early '60's. Granted, they were fairly small screen, although 14" for the Pye TT1 was quite respectable. Amazing that it ran on batteries as well!

John, that Transvista is a sweet little thing- the name makes it sound state of the art as well!

I never even suspected there were any 405 only transistor sets!

Cheers
Nick
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Old 3rd Jun 2019, 11:59 pm   #18
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Default Re: All transistor 405 line (or DS) TV's

Quote:
Originally Posted by 1100 man View Post
Well, this has proved to be an interesting thread! Considering transistor radios only came on the market in the late '50's, I'm amazed that there seems to have been quite a few all transistor TV's in the early '60's.
Cheers
Nick
I think the first or one of the first all transistor TV's was the Philco Safari in 1959 :
http://www.tvhistory.tv/1959_PHILCO_SAFARI_H2010L.JPG
Then in the early 1960's many types appeared from Sony & Sanyo etc.Yet often, these still had vacuum tube EHT rectifiers.

One of the big issues that slowed this down was not the high frequency capable signal RF transistors, but HF capable germaniums that could handle a moderate amount of power. Specifically the H output transistor which needed a high fT, low storage time and high VCE max etc to switch off well eough and quick enough for H flyback.

To a lesser extent the video output transistor was also a challenge in 1959.

In American sets the mainstay for the H output transistor was the 2N3731 and it had a companion damper diode. The AU series in Europe had rough equivalents.

For video output, Mullard had the AF118 (also affected by tin whisker disease) and the Japanese had the 2SA358.

The first silicon transistors to appear in these early portable TV's in the late '60's were in the video output stage, and the H & V output stages.
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Old 4th Jun 2019, 10:31 am   #19
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Default Re: All transistor 405 line (or DS) TV's

In theory, there must have been a few Practical Television "Olympic II" sets (April 1965)
built, a 405 only (initially) 14" set that was all transistor except for the DY86.
I would be interested in any have survived, the updated design also appears in Newnes
"Practical Television Circuits" book, 1968. All germanium, 2N1908 line output.
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Old 4th Jun 2019, 12:58 pm   #20
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Default Re: All transistor 405 line (or DS) TV's

Quote:
Originally Posted by Restoration73 View Post

There may have been other small screen sets imported in very small numbers.
I seem to remember at least one (Crown ?)

Indeed there was/is, I have a specimen here in the workshop that functions, it is filthy and has received no attention from me as yet. See attached image.

Cheers
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