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Another Ferguson Personal 3629

Pre War 240/405, Post War 405 Line, B&W Dual Standard, Colour Dual Standard, B&W S/S 625, Colour S/S 625 line, Hybrids. Standards converters & modulators, video recorders.
 
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Another Ferguson Personal 3629

Post by Focus 2 » Sun Aug 21, 2016 12:22 am

This was the Ebay bargain Steve kindly picked up for me. I'm having an enjoyable weekend at his and will bring the set home tomorrow.

Looks very original inside. I was fascinated to note the line output valve fitted is a PL500, very much a rarity like the colour PL505. I've only seen one other PL500, a Philips branded one.

The set has the 900 chassis with a valve UHF tuner.

Should be an easy restoration.

Cheers
Brian
Attachments
Edited_ImageEasyImageEditor_20160821_157.jpg
Edited_ImageEasyImageEditor_20160821_156.jpg
Edited_ImageEasyImageEditor_20160821_155.jpg
Edited_ImageEasyImageEditor_20160821_154.jpg

 
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Re: Another Ferguson Personal 3629

Post by marc » Sun Aug 21, 2016 12:46 am

Hi Brian,

I'm looking forward to seeing your Fergy come back to life.
At least me, Steve and the B&K know it's got a cracking CRT !
Well we couldn't leave your telly out after checking all Steve's stock last weekend could we :bba

Marc.

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sun Aug 21, 2016 9:55 am

Well, it looks like it's going to be a good runner! After a gentle wake up the set produced a raster at 150V. By the full 230V this was the not unexpected result. The valve UHF tuner appears to be working too.

Should be an easy restoration! Sorry the first two pics are upside down.

Cheers
Brian
Attachments
Edited_ImageEasyImageEditor_20160821_158.jpg
First light at 150V
Edited_ImageEasyImageEditor_20160821_159.jpg
A little more
Edited_ImageEasyImageEditor_20160821_160.jpg
Resultant picture at 230V

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Tue Aug 23, 2016 9:40 am

Got this in Asda this morning, £2. Turns out to be a little on the light side unfortunately but may be acceptable in the interim is all knobs are changed to the same colour.

I'll be starting work on the interior on Friday.

Cheers
Brian
Attachments
Edited_ImageEasyImageEditor_20160823_162.jpg
Edited_ImageEasyImageEditor_20160823_163.jpg

 
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Re: Another Ferguson Personal 3629

Post by PYE625 » Tue Aug 23, 2016 10:22 pm

Looks a little Gem there Brian :aad

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Fri Aug 26, 2016 8:39 am

Forget the metalic card, it looked terrible, so much the lack of brights look better in comparison. Worth a try though. Sure the cards will come in useful elsewhere especially with Christmas not far away!

Cheers
Brian

 
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Re: Another Ferguson Personal 3629

Post by 405 fan » Fri Aug 26, 2016 8:53 am

Hi Brian
I might just have the type of gold labeling that you need . I'll pm you later .
Regards.
Gary.

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sat Aug 27, 2016 10:42 am

On initially replacing R102, R107, C89, C81 and C90 which, like Aiden I fitted a 0.022uF capacitor in place of the original 0.03uF I had full scan with the frame running at the wrong speed. I was unable to replace C79 due to not having anything rated at 1500V. I wonder why the need for such a high working voltage seeing they fitted a 600v rated boost capacitor (soon to be replaced by a 1kv rated one)?

C80 under the far end of the system switch was found to be a Hunts type. This was changed along with R103 2M2, R111 100k and R113 120k. C82 was found to be a RS replacement and C89 a Plessey type suggesting past service work in this area.

This resulted in rock solid frame lock. Quick adjustment revealed slight frame cramp at the bottom. I'll try a new PCL805 next time having been caught out before. There's also slight lack of width I'll attend to next time.

Unlike the full sized counterparts these models are not very service friendly. Loosening the side nuts to swing up the chassis it would only go part of the way. The leads to the scan coils are too short to allow swinging up any further. Like the 960 portable it looks like I'll have to disconnect the scan coils to allow full access for servicing. This makes it difficult to check voltages in situ. I may consider fitted longer leads to the coils. Don't know if my example is a one off or if others have encountered a similar problem?

Cheers
Brian
Attachments
Edited_ImageEasyImageEditor_20160826_165.jpg
Edited_ImageEasyImageEditor_20160826_166.jpg

 
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Re: Another Ferguson Personal 3629

Post by Colourstar » Sat Aug 27, 2016 2:43 pm

Looking excellent so far Brian. Being mostly used as second sets these models don't seem to rack up very high mileages so the crts are generally still in their first flush of youth, as yours appears to be. I seem to remember the sound quality is pretty good too.

Keep up the good work!
Steve

 
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Re: Another Ferguson Personal 3629

Post by Brianc » Sat Aug 27, 2016 3:39 pm

This is one of the few later sets which I would quite like in my collection. A very neat design and obviously capable of good results. Nice work Brian. You'll make me get one yet!

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sat Aug 27, 2016 7:09 pm

Hi Brian,
The style certainly reminds me of one of Till's French 441 line models plus its rubber CRT surround, yet was otherwise upto date electrically including facilities for the new UHF service of BBC 2. The BRC 900-950mkII chassis is capable of excellent results on both systems.

Well worth having!
Cheers
Brian R

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sat Aug 27, 2016 7:19 pm

Hi Steve and Gary,
Very many thanks. The cabinet may be a bit of a challenge as some of the internal glue is showing its age I've tried fixing with wood glue but lack facilities such as clamping the cabinet together. On further examination ignoring the usual trim surround problems I've noticed the black fabric surround is starting to curl over.

Once I've sorted the set out electrically I might ask David if he fancies working on the cabinet at his standard charge rates. As it will take pride and place in the living room it will be worth it.

Cheers
Brian

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sun Aug 28, 2016 9:58 pm

The PCL 805 wasn't responsible for the slight bottom cramp. I then discovered C88 in the linearity circuit which was a 0.01uf Hunts type. It did well playing hide and seek with me yesterday, how I missed it before I don't know. Anyway, replacing this solved the problem.

Frustratingly I was only able to buy two axil 0.1uf 1kv rated capacitors when I need at least four. I'll attend to that when I can get more, these are becoming expensive at around £3.20 each. While I was at it the two 1uf 350v electrolytics in the line output stage were changed as was C43 known to cause trouble in a 950mkII, see the thread on the HMV 2635.

A 1kv rated boost capacitor was also fitted.

The width is still a little on the low side but I'm reluctant to carry out adjustments to this without measuring the boost volts and being unable to replace both scan correction capacitors at this time. I was able to attend to the pincushion correction magnets on the E and W side which corrected the bowing on the right of the picture.

A check on UHF with the Maplin modulator in test mode allowed the adjustment of the 625 line hold. All seems well on that standard.

The set is working happily, the main smoothing can being cold on a prolonged run.

That's the latest, still plenty to do.

Cheers
Brian
Attachments
WP_20160828_17_28_33_Smart.jpg
405 ch8
Edited_ImageEasyImageEditor_20160828_170.jpg
625 ch 64
Edited_ImageEasyImageEditor_20160828_171.jpg

 
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Re: Another Ferguson Personal 3629

Post by Cathovisor » Sun Aug 28, 2016 11:31 pm

Focus 2 wrote:Frustratingly I was only able to buy two axil 0.1uf 1kv rated capacitors when I need at least four. I'll attend to that when I can get more, these are becoming expensive at around £3.20 each.

£2.33 plus VAT from Farnell, with a 20% price break at ten pieces:

http://uk.farnell.com/vishay/mkp1845410 ... dp/1413935

These are very good caps indeed - have even used them on motor cars across the points (on a sidevalve Minor pickup) with great success!

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Mon Aug 29, 2016 3:37 pm

Thanks Cathovisor. I'll put an order in.

Cheers
Brian

 
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Re: Another Ferguson Personal 3629

Post by Colourstar » Mon Aug 29, 2016 7:49 pm

Wow, looking lovely on 405!

Steve

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Mon Aug 29, 2016 10:35 pm

Thanks Steve, wasn't easy taking the photo on the phone as it seemed to catch alternative frames only for some reason, must've been the light surround.

Next, when I can replace the two scan correction capacitors I'll be replacing capacitors in the IFs and will carry out preventative maintenance in the sound output stage.

I'll also check the boost volts and look at why the width is reduced. I've already replaced the 330k feed resistor to the width control.

I'll also look forward to running a 625-line signal source. By the quality of the modulator test signal the picture should be excellent.

Then finally the cabinet.

Cheers
Brian
Attachments
Edited_ImageEasyImageEditor_20160829_172.jpg

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sat Sep 03, 2016 8:08 pm

The boost volts are 510V on 405 and 535V on 625. This is clearly some 100V lower than full screen models, but understand HT is reduced by some 30% in this special 11" version. The width control is set near to maximum.

Anyone know what the boost volts should be on this version? Few suspect resistors notably R130 2M2, R138 1M8. Find I don't have any suitably sized ones so more components to order.....Bah!
In spite of the slight lack of width the set is working very well.

I replaced both 405 and 625 scan correction capacitors, unfortunately I only had a 0.22uf for the 405 one so I had to wire in a 0.1uf on the underside. Thankfully this didn't prevent fitting the chassis back in the cabinet.

Oh yes, a "fault" occurred with some wobbling verticals. The effect on sound was the give away; my phone was next to the set! Moving the phone away from the set gave an instant cure!

Cheers
Brian

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Sun Sep 04, 2016 11:20 am

Photos taken yesterday. I've ordered a compact DVD player which will be part of a permanent installation.
Attachments
Edited_ImageEasyImageEditor_20160904_175.jpg
405
Edited_ImageEasyImageEditor_20160904_174.jpg
625

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Wed Sep 07, 2016 2:37 pm

625-line assessment on our old BBC2 ch64, results extremely good. The colour area really glows on these 900-950 models. Certainly no apparent alignment problems with excellent sound.

Can't find my test card DVDs at the moment, the slight lack of width is clearly evident with the height a little down too. I'll be doing more work tomorrow now more bits have arrived then will set up on 625 once I find the Test Card DVDs.

The BBC pie chart is in poor quality but looks remarkably cleaned up on this set.

Cheers
Brian
Attachments
Edited_ImageEasyImageEditor_20160907_177.jpg
Edited_ImageEasyImageEditor_20160907_178.jpg
Edited_ImageEasyImageEditor_20160907_179.jpg

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Thu Sep 08, 2016 6:13 am

I'll be getting the set back on the bench this evening. Inevitably AGC problems developed on the 625-line standard, flickering, resembling a tuner fault with no contrast control function. Like the 960 portable the control is integrated for both standards and is a front mounted , unusual for BRC.

So far not one valve has needed replacing. Still much work to do....
I did find the Test Card DVD yesterday, the image didn't look too bad showing more lack of height than width!

Brian
Attachments
Edited_ImageEasyImageEditor_20160907_180.jpg

 
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Re: Another Ferguson Personal 3629

Post by Focus 2 » Fri Sep 09, 2016 3:26 pm

Further capacitor replacements cured the AGC problems with the contrast control working as it should do. R131 which should be 1M8 was replaced by a 2M2 which was all I had that would fit. This sorted out the width problem with optimum position roughly at the centre of the control. Only problem is setting up on 625 results on switching to 405 in excessive height with the test card castellation's showing, but otherwise filling the screen. Settling up on 405 results in slight lack of height and excessive width on 625. Not wishing to run the set with the overscan in fear of upsetting the EHT half wave rectifier tray a compromise was reached giving preference to 625 as the set will be used more often on that standard.

Boost volts are 540V on 405 and 575V on 625.

A niggling fault of very intermittent wavy verticals developed, I have an identical problem with the HMV 960 portable so looks like a common problem. Anyone any ideas what causes this? Doesn't appear to be heat related. Obviously something I've overlooked somewhere.

Cheers
Brian


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