UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Television and Video

Notices

Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

Closed Thread
 
Thread Tools
Old 17th Feb 2023, 7:08 pm   #1
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Grandelek Rebuilt CRT.

Last Monday I collected a Pye FV1 from Doncaster. Saved it from the possibility of being up-cycled to become a cat of small dog bed. That's how it was advertised.
Felt duty bound to save the poor thing.
The set has a rebuild MW31-74 CRT from a firm called Grandelek.
Never come across this CRT rebuilder before.

DFWB.
Attached Thumbnails
Click image for larger version

Name:	Grandelek_CRT.jpg
Views:	329
Size:	83.2 KB
ID:	273431  
FERNSEH is offline  
Old 17th Feb 2023, 7:43 pm   #2
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Default Re: Grandelek Rebuilt CRT.

I've seen quite a few Grandelek's back in the day, I think they supplied one of the firms I worked for.

Lawrence.
ms660 is offline  
Old 17th Feb 2023, 7:49 pm   #3
peterpixel
Pentode
 
Join Date: Jul 2013
Location: Wilmslow, Cheshire, UK.
Posts: 209
Default Re: Grandelek Rebuilt CRT.

This company was based in Marple and was run by a man called Oscar Rabin. I bought quite a number of rebuilds off him and never had any problems with them. My last dealings with him would be about 1985. Peter.
peterpixel is offline  
Old 17th Feb 2023, 7:59 pm   #4
Nickthedentist
Dekatron
 
Nickthedentist's Avatar
 
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,820
Default Re: Grandelek Rebuilt CRT.

https://visitmarple.co.uk/photos/dis...e.php?pid=5088
Nickthedentist is offline  
Old 17th Feb 2023, 8:08 pm   #5
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Default Re: Grandelek Rebuilt CRT.

Also in this thread from a couple of years or so ago:

https://www.vintage-radio.net/forum/...d.php?t=174245

Lawrence.
ms660 is offline  
Old 17th Feb 2023, 8:10 pm   #6
G6Tanuki
Dekatron
 
G6Tanuki's Avatar
 
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 13,953
Default Re: Grandelek Rebuilt CRT.

Companies House doesn't have any info on Grandelek, which implies that they ceased trading over 20 years ago [from memory, when Companies House made their records searchable electronically some time in the late-90s they didn't load data from companies which were no longer trading at the time]
__________________
I'm the Operator of my Pocket Calculator. -Kraftwerk.
G6Tanuki is offline  
Old 18th Feb 2023, 9:43 pm   #7
Laurence Smith
Tetrode
 
Laurence Smith's Avatar
 
Join Date: Mar 2021
Location: Bicester, Oxon & North Cornwall, UK
Posts: 74
Default Re: Grandelek Rebuilt CRT.

I saw that listing too - I'm glad you saved it!
__________________
Laurence

BVWS Member
Laurence Smith is offline  
Old 18th Feb 2023, 10:46 pm   #8
Richard_FM
Octode
 
Richard_FM's Avatar
 
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 1,999
Default Re: Grandelek Rebuilt CRT.

Quote:
Originally Posted by Nickthedentist View Post
Thanks, I was wondering where they were based in Marple, as I lived there for nearly 30 years.

In the previous thread I pondered on a few potential sites, but not this one.
__________________
Hello IT: Have you Tried Turning It Off & On Again?
Richard_FM is offline  
Old 19th Feb 2023, 1:16 am   #9
peterpixel
Pentode
 
Join Date: Jul 2013
Location: Wilmslow, Cheshire, UK.
Posts: 209
Default Re: Grandelek Rebuilt CRT.

Richard, the link was given in post #60, in reply to your post #57, in the link given by Lawrence in #5 in this thread. Peter.
peterpixel is offline  
Old 19th Feb 2023, 3:05 pm   #10
Richard_FM
Octode
 
Richard_FM's Avatar
 
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 1,999
Default Re: Grandelek Rebuilt CRT.

Quote:
Originally Posted by peterpixel View Post
Richard, the link was given in post #60, in reply to your post #57, in the link given by Lawrence in #5 in this thread. Peter.
Thanks for reminding me, I had forgotten!
__________________
Hello IT: Have you Tried Turning It Off & On Again?
Richard_FM is offline  
Old 19th Feb 2023, 6:32 pm   #11
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Grandelek Rebuilt CRT.

The Pye FV1 needs a lot of work doing to it before it ever displays a picture on the Grandelek CRT. For starters almost every section of the mains dropper is open circuit, most likely caused by corrosion.
The line output transformer is receiving the warming up treatment.
Cabinet refurbishment is the easy part of the restoration.

DFWB.
Attached Thumbnails
Click image for larger version

Name:	FV1_LOPTx.jpg
Views:	246
Size:	93.8 KB
ID:	273563  
FERNSEH is offline  
Old 19th Feb 2023, 9:28 pm   #12
Joe_Lorenz
Hexode
 
Join Date: Dec 2019
Location: Hohenroda, Eastern Hesse, Germany
Posts: 451
Default Re: Grandelek Rebuilt CRT.

Oh my dear! That looks like a lot of work to do. But well, how many of these have survived to now? Quite few I guess!

You are a brave man!

Joe
Joe_Lorenz is offline  
Old 19th Feb 2023, 10:00 pm   #13
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Grandelek Rebuilt CRT.

Hi Joe,
I already have a Pye FV1 in my collection. Bought for me 1960.
That set is in excellent condition. The set we're discussing in this topic was found in an attic. Put up there forty years ago. There's evidence it's been a very reliable set, only one valve replacement and that was the PL38 line output valve. Date code is B7G. And of course that CRT.
No other component replacements.

DFWB.
FERNSEH is offline  
Old 20th Feb 2023, 10:34 pm   #14
Joe_Lorenz
Hexode
 
Join Date: Dec 2019
Location: Hohenroda, Eastern Hesse, Germany
Posts: 451
Default Re: Grandelek Rebuilt CRT.

That sounds exceptional! So the set is worth the effort. Among my collection there is just one set that has never been in need of repairs, a SABA T 187.

Good success!
Joe
Joe_Lorenz is offline  
Old 22nd Feb 2023, 10:55 pm   #15
Wellington
Hexode
 
Wellington's Avatar
 
Join Date: Jun 2009
Location: Cheshire, UK.
Posts: 363
Thumbs up Re: Grandelek Rebuilt CRT.

A Grandelek label found in a Ekco T311. (This set was eventually subject to an epic restoration back in 2010 by Col.)

I didn't know that they were based in Marple. Makes sense, being relatively local.
Attached Thumbnails
Click image for larger version

Name:	T311 tube.jpg
Views:	109
Size:	198.8 KB
ID:	273764  
Wellington is offline  
Old 22nd Feb 2023, 11:22 pm   #16
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Grandelek Rebuilt CRT.

The cabinet that houses the 12" Grandelek tube is receiving the attention it deserves. I doubt if the cat and dog bed or up-cycling types would have gone to the extent of doing this kind of work.

DFWB.
Attached Thumbnails
Click image for larger version

Name:	FV1_Cabinet.jpg
Views:	191
Size:	79.1 KB
ID:	273776  
FERNSEH is offline  
Old 25th Feb 2023, 8:52 pm   #17
Joe_Lorenz
Hexode
 
Join Date: Dec 2019
Location: Hohenroda, Eastern Hesse, Germany
Posts: 451
Default Re: Grandelek Rebuilt CRT.

That looks great! What did you have to do to get it so shiny now?

Joe
Joe_Lorenz is offline  
Old 26th Feb 2023, 6:19 pm   #18
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Grandelek Rebuilt CRT.

Joe_Lorenz wrote: "That looks great! What did you have to do to get it so shiny now?"
Hi Joe,
after scraping off the the old lacquer french polish was applied to the surfaces. It's likely the sides will require the same treatment.

DFWB.
FERNSEH is offline  
Old 20th Mar 2023, 11:46 pm   #19
FERNSEH
Dekatron
 
FERNSEH's Avatar
 
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: Grandelek Rebuilt CRT.

The electrical restoration of the Pye FV1 continues. All the necessary components in the power supply have been fitted and work continues on the rest of the chassis.
We're looking forward to seeing how good or bad the Grandelek CRT is.
The FV1 and derivatives FV2C and FV4C are difficult sets to carry out live servicing work. There is no access to the underside of the chassis when it is installed in the cabinet. What is needed is extension cables so the work can be done with the chassis outside the cabinet.
Must try and find the twelve pin plug and socket used in these receivers to connect the scan coils, the loudspeaker and CRT socket.
The second attachment shows to type of socket I'm looking for. Also, will need the matching plug.
DFWB.
Attached Thumbnails
Click image for larger version

Name:	FV1_20032023.jpg
Views:	106
Size:	94.8 KB
ID:	275445   Click image for larger version

Name:	FV1_12_Pin_Socket[1].jpg
Views:	97
Size:	75.5 KB
ID:	275447  

Last edited by FERNSEH; 21st Mar 2023 at 12:05 am.
FERNSEH is offline  
Old 21st Mar 2023, 1:43 am   #20
Techman
Dekatron
 
Techman's Avatar
 
Join Date: Nov 2009
Location: Lincolnshire, UK.
Posts: 4,985
Default Re: Grandelek Rebuilt CRT.

Quote:
Originally Posted by FERNSEH View Post
There is no access to the underside of the chassis when it is installed in the cabinet. What is needed is extension cables so the work can be done with the chassis outside the cabinet.
Yes, tell me about it!

I started working on one of these a couple or so years ago and got fed up with the awkwardness of having to keep removing and refitting the chassis all the time. The last time I worked on it I had a lack of height problem and suspected a possible problem with that blocking (or similar) transformer, as on close inspection there were pencil marks on the connections, evidence that it had been disconnected in the past. This TV had come from the attic offices of a closed down TV shop and looked like it had had very little use. The former shop owner was a once respected local TV engineer, so guessing that having come to this fault in the sets early life, it was put aside for another time and another day, a day that never came.

I found that the dropper sections were o/c due to corrosion of their windings and I've patched in a not so well fitting replacement for the time being. The large smoothing can was completely dud and despite my best efforts to reform it, it leaked its fluid and I had to be quick with the kitchen roll to soak it up before it made a mess everywhere.

The back and bottom of the cabinet are riddled with woodworm, but the near mint veneered parts haven't got a single hole, so I soaked the infected parts with woodworm fluid and it seems to have done the job.

It may not be that transformer contributing to the height problem, but not being able to easily do proper fault finding on the chassis has caused me to put the set to one side for the time being.

Last edited by Techman; 21st Mar 2023 at 1:56 am.
Techman is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 10:46 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.