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Pye Continental CTM17S.

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Till Eulenspiegel
(@till)
Famed V-Ratter Registered

The picture on this Pye Continental has become very dim. All attempts at boosting the CRT are now just a waste of time. The CRT is worn out. Fortunately I have a spare Cossor MW43-69 which will be used as the replacement. the Cossor tube was made by Mullard.

Unlike Marc's Pye Continental which has the full specification fringe area 17F chassis my set is fitted with the very basic hand wired 17S chassis. Direct line sync, mean level vision AGC and only one loudspeaker.

pyect 1
pyect 2
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Topic starter Posted : 03/09/2015 3:27 pm
Katie Bush
(@katie-bush)
Illustrious V-Ratter Moderator

All attempts at boosting the CRT are now just a waste of time. The CRT is worn out.
DFWB.

To paraphrase Edmund Blackadder....  "Would you say then, it's flatter than a flat thing, flattened by a flat thing flattener that's been working flat out - at all?"

I always think these are quite nice looking sets, and have a bit of a modern look, in a contemporary 50's cabinet. Now, is that first light? Or have had to work on the set to get this far?

Marion

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Posted : 03/09/2015 7:00 pm
mark pirate
(@mark-pirate)
Member Deactivated Account

I have always had a liking of Pye sets, I look forward to the results of fitting a decent tube 

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Posted : 03/09/2015 7:23 pm
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

Hi Marion,

No more flatnessness. The set now displays a crisp black and white picture. According to the electrolytic capacitors which are dated mid 1956 it's likely the set was first bought in the late summer of that year.

Hi Mark,

Good solid stuff mid fifties Pye products. Some folks like the style of the Pye Continental and others think it is a big ugly thing. Export versions of this set were made for the Continental 625 line standard. Remember Pye boss C. O. Stanley was not a great fan of the 405 line system.

Till Eulenspiegel.

pyect 3
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Topic starter Posted : 03/09/2015 8:40 pm
malcscott
(@malcscott)
Noble V-Ratter Registered

Hi David,

you will have to drop the old crt off at Dunelm or Teletronic for a regun.

Malc 

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Posted : 03/09/2015 9:01 pm
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

Hi David, you will have to drop the old crt off at Dunelm or Teletronic for a regun, Malc 

Hi Malc,

It would be wonderful if those firms were still in existence. They'd easily re-gun our old mono tubes. Do you remember the very last mono tubes Mullard made for the replacement market? There was the MW43-69Z which was a 17" 70 degree mono tube fitted with at first a non ion trap magnetic focus gun and later on the electrostatic focus gun from the 110 degree AW43-88. The focus magnet assembly had to be removed and a centering magnet fitted instead.

Also the AW43-80Z, similar to the AW43-80 but fitted with the 110 degree gun. You had to replace the tube base using the B8H from the 110 degree tubes.

There was also a 14" replacement tube, the AW36-20Z. Never seen one. These tubes were available up to the end of the sixties.

Till Eulenspiegel.

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Topic starter Posted : 03/09/2015 10:15 pm
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

Now, is that first light? Or have had to work on the set to get this far?

Marion

Hi Marion,

this set has been amazingly reliable, it's even still full of waxie capacitors. In fact I've done nothing to it since a gent brought into the shop in 1985. Nothing wrong with set but the 405 line system had closed down that year.

Till Eulenspiegel.

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Topic starter Posted : 03/09/2015 10:22 pm
Katie Bush
(@katie-bush)
Illustrious V-Ratter Moderator

Hi Marion,
this set has been amazingly reliable, it's even still full of waxie capacitors. In fact I've done nothing to it since a gent brought into the shop in 1985. Nothing wrong with set but the 405 line system had closed down that year.

Till Eulenspiegel.

Would you believe, I had a funny feeling about this set? And I guess you've just confirmed what I was thinking - isn't that weird? 

Marion

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Posted : 03/09/2015 10:32 pm
malcscott
(@malcscott)
Noble V-Ratter Registered

Hi David,

i remember seeing those crt's advertised in the tv mag. Was it a chap called Philip Bearman who had a crt supply business?

Malc.

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Posted : 03/09/2015 11:19 pm
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

Hi Malc,

I remember the name. Also, there was a firm called the Television Tube Shop or something like that which advertised in the Television magazine. I'm sure they offered the MW43-69Z and AW43-80Z.

Till Eulenspiegel.

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Topic starter Posted : 03/09/2015 11:56 pm
mark pirate
(@mark-pirate)
Member Deactivated Account

The set now displays a crisp black and white picture.

That looks great, what an improvement, I suppose the old tube had seen 30 years use before expiring, not a bad innings 

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Posted : 04/09/2015 2:10 am
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

Hi Mark,

In fact this set has a very unhealthy appetite for CRTs. The tube that was replaced yesterday is the third one fitted since the set was made. When I accepted the set in 1985 it was fitted with a service replacement Pitrie branded tube, most likely to be a rebuild. This one lasted until the late 1990s and then it was replaced by a Mullard MW43-69. That one soon went down to low emission and as boosted over and over again to the point it could not be boosted anymore. The Cossor branded tube was removed from my Masteradio TG7T, that set received a replacement unmarked tetrode tube.

So now the Pye is on it's fourth tube. I've checked the heater volts, 6.25, that's OK.

Till Eulenspiegel.

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Topic starter Posted : 04/09/2015 11:54 am
Terry
(@terrykc)
Famed V-Ratter Rest in Peace

... Do you remember the very last mono tubes Mullard made for the replacement market? ... These tubes were available up to the end of the sixties ...

Have you got the right decade there?

I was in the retail trade until the end of 1969 and never saw any of these weird Z tubes! Any replacement CRTs we fitted were the Mullard originals or, later on, the Mullard re-gunned tubes, the name of which escapes me ...

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Posted : 04/09/2015 1:08 pm
Till Eulenspiegel
(@till)
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Hi Terry,

I do have upstairs Mullard AW43-80Z which was I believe bought sometime in the mid seventies. i'm keeping it for a special set, something with real technical merit. The next time i get a chance to look at it I'll check the date codes.

The MW43-69Z appeared in the mid sixties first as a non ion trap tube. Rediffusion used them in certain sets.
Trevor (Murphy310) remembers a strange tube that British Relay used in certain sets. It was a 90 degree AW43-80 fitted with the 29.5mm neck and 110 degree gun assembly, this change made it necessary to fit replacement scanning coils.

The British Relay cable set model P17-3 was equipped with this tube.

Till Eulenspiegel.

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Topic starter Posted : 04/09/2015 1:46 pm
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

the Mullard re-gunned tubes, the name of which escapes me ...

Mullard called their replacement CRTs "Luminar" Some were certainly rebuilds and many were brand new.

Till Eulenspiegel.

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Topic starter Posted : 04/09/2015 1:48 pm
Till Eulenspiegel
(@till)
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the Mullard re-gunned tubes, the name of which escapes me ...

Mullard called their replacement CRTs "Luminar" Some were certainly rebuilds and many were brand new.
Never seen a Luminar colour tube.

Till Eulenspiegel.

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Topic starter Posted : 04/09/2015 1:49 pm
Anonymous
(@anonymous)
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I don't remember seeing anything about the Z tubes in the text of the issues of PTV in the library. I looked at every page of text but not the adverts while compiling the indexes.

Al

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Posted : 04/09/2015 1:54 pm
Jayceebee
(@jayceebee)
Noble V-Ratter Registered

The MW43 69Z appears in my Mullard data book of 1968, the MW43 64 in my grandparents Philips 1756U was fitted with a Teletronic MW43 69Z regun CRT from Seaham around the same year. I'm now wondering if it was definitely a regun or a brand new rebadged Mullard.

Unfortunately it didn't have a long life, a subsequent repair by an unscrupulous engineer involved dropping the mains tapping to 220V. I pointed this out at the time but no notice was taken of a 12 year old and the inevitable consequences followed.

The set eventually came into my hands and I replaced the 70 degree CRT with a 90 degree AW43 80, with no modifications other than removing the magnetic focus assembly and replacing a few valves. Even with no focus voltage or centering magnets the picture was very good.

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Posted : 05/09/2015 12:18 am
Till Eulenspiegel
(@till)
Famed V-Ratter Registered

The Teletronic MW43-69Z did not have an ion trap magnet. Likewise, from the same firm the later replacement for the Mazda CRM172 did not have the ion trap. In certain sets the two tubes are not interchangeable because the neck diameters differ. 38mm for the Mullard and 35mm for the Mazda.

Till Eulenspiegel.

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Topic starter Posted : 05/09/2015 11:12 pm
Jayceebee
(@jayceebee)
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I wonder why the original MW43-69 non Z version was produced with a bent gun requiring an ion trap magnet as it had an aluminised screen or am I missing something?

I'm led to believe the only difference between the MW43-64 and 69 is the latter being alumunised.

John.

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Posted : 05/09/2015 11:32 pm
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