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1977 Aphelion :Telefunken 712 Chassis

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crustytv
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This might seem like an odd "ball" ( topical) to add to the collection but I couldn't resist. I know its not British but for this set I make the one and only exception, a Telefunken PalColor. 

I know nothing of these sets, what chassis is employed, what CRT or anything about the set. It will therefore be a baptism and an education. I've often toyed with getting a Keracolour but was uninspired by the Decca Bradford chassis that was to be found within. Don't get me wrong the Bradford is a superb chassis and gives a great account of itself, the issue for me is I already have two sets with a Bradford chassis so I wanted something a little different.

This Telefunken satisfied that on both levels, its iconic 70's styling, oval not round and I've heard great things about Telefunken sets. Telefunken TV's were to be found in the UK in the 70's CTV boom due demand outstripping supply from British manufacturers.

This set is being shipped specialist courier and should arrive in a couple of weeks, then I can hopefully provide internals and have an idea what I'm dealing with electronics-wise, I'm certain its fully solid-state.

For now some taster pictures, its not faded the colour is Mushroom.

telefunk1.jpgtelefunk3.jpgtelefunk2.jpg

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Topic starter Posted : 28/06/2016 12:22 pm
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Nuvistor
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What size screen is it, cannot seem to get and idea from the photos?

Frank

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Posted : 28/06/2016 10:22 pm
crustytv
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I believe its 26"

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Topic starter Posted : 28/06/2016 10:55 pm
crustytv
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Just been informed by the courier, the set arrives at the workshop on Tuesday this week. Looking forward to having a peek inside this unusual set.

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Topic starter Posted : 03/07/2016 7:07 pm
Cathovisor
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Hi Chris,

I'd have a quiet shilling on that being a variant of the chassis that was in my first colour TV - the Telefunken 711 chassis. The touch controls, the number of sliders and their disposition and the ultrasonic remote... I'd reckon that's a model 773 in drag wink

So if it is, expect a thyristor power supply, conventional line output stage with a tripler and a 2SC1413A in it, a vertical board carrying the signal stages/RGB output stages and a horizontal board with the timebases and power, and a separate board which carries the dynamic convergence assembly, so no overheated wirewounds and jammed inductors wink Also expect excellent sound quality.

Mine had a PSU fault I could never get to the bottom of: something wrong with the thyristor that alarmingly, made the picture wobble a bit but also, made the electricity meter 'knock' in sympathy!! They thyristor, if original, is an odd-looking thing at the base of a cylindrical 'chimney'.

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Posted : 03/07/2016 8:13 pm
crustytv
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Thanks for the info, most illuminating.

I really do need to check my red books for service data though I expect like mother Hubbard's cupboard, they will be bare. waa_gif

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Topic starter Posted : 03/07/2016 8:32 pm
Cathovisor
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On the contrary, it's in the Red Books thumb_gif There's nothing on the 773 and the ultrasonics, but the 743 and the 711 chassis are covered - 1974/75 volume IIRC.

http://www.radiomuseum.org/r/telefunken_pal_color_743.html

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Posted : 03/07/2016 8:45 pm
crustytv
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Ah-ha  indeed it is 1974-1975 page 154

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Topic starter Posted : 03/07/2016 9:25 pm
crustytv
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Well its arrived and my god its HUGE..... I had no idea as from the photos before I bought, it looked average size. Even the photo's I've take don't do justice to its actual size.

The cabinet is in immaculate condition, some slight bobbling to the fibreglass base edges but other than that I'm very pleased. The chassis looks to be in fairly good condition too but does show evidence of garage or shed storage as there is slight rusting to some covers. Still after the nightmare sets from a couple of years ago and the HMV 2703, this will not prevent the set from being returned to working order. 

The chassis is in fact a Telefunken 712, not the 711. The data is in the 1977-1978 book from page 373. This narrows the model down to 656,676,746,886,986,DC676, DC886. A little more research required to determine which this set is.

The tube is a Telefunken A66 500X, I shall test it shortly to see if the set is a viable repair, fingers crossed.

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Topic starter Posted : 05/07/2016 1:06 pm
crustytv
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Tested the A66 500X on the B&K 467, the CRT is in excellent condition and should give a superb account of itself. The emission on all three guns from the go were good and getting better all the time after being woken up from its slumbers. Tracking is spot on, Life test again spot on. Looking forward to seeing a picture on this set.

Now are Telefunken as bullet proof as their Japanese counterparts? A couple of years ago I got a Hitachi that had sat in a garage for 40 years, plugged it in and the thing just worked and still does, phenomenal.

I'm sure like other sets such as the 3K, this will not be happy being run up on a variac, therefore its intense visual inspection time to determine if anything looks to be untoward.

tefcrt01.jpgtefcrt02.jpg

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Topic starter Posted : 05/07/2016 1:26 pm
GEC2110
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If tube is good and set up correctly this set will last and give good results 

it is a vast improvement on the 711 711A chassis 

Mark.

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Posted : 10/07/2016 5:28 pm
crustytv
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TV repaired, you can follow its blog here

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Topic starter Posted : 29/07/2016 12:15 pm
PaulGoggo1
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Hi Chris

 

Apologies I didn't see your earlier post about the Telefunken 712. Well congratulations, what a find!

Very rare set I guess in that shape. The one I had was indeed a 712 Chassis, a model 746. Excellent chassis, both performance, and as you discovered, for service accessibility. Yes I could have assisted you, but you have done very well and with a top result.

I still have my portable 614, 511 Chassis set. Still looking for that elusive 712, 746 or 846 standard cabinet! been searching a long time. no sign of the earlier 711, 743 or the hybrid 709 either!.  Where did you come across the set? was it costly to courier over here?

Cheers

 

Paul

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Posted : 11/09/2016 7:29 pm
Marcus 3700
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Hello Chris,

I shall be calling into Doncaster on Sunday and will take pictures of the service manuals. I spoke with him awhile back and the cabinet details size and cuts was mainly for the G11 version sadly, he does have most if not nearly all the electrical side for 712 but some duplicates are in German. The tv he had was sold to a chap in Italy for £500 working, but with low red and green guns he gave all the original manuals including the cabinet details for Grundig, Philips and Telefunken for an extra £100.

He told me he still has an original G11 chassis poster and introduction audio cassette from 1977 if you're interested let me know on Saturday.

Marcus.

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Posted : 22/10/2016 3:05 am
Marcus 3700
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Hello Chris,

With not hearing from you regarding 712 manuals I will not be going so at-least I get to have a lie-in. Let me know if you're still interested in them.

Marcus.

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Posted : 23/10/2016 2:51 am
crustytv
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Hi Marcus,

I was somewhat preoccupied and busy yesterday with fixing a serious fault on the site/forum. In some respects it was fortuitous for both you and I, in as much you get a lay in and I stop myself from being fleeced. 

At the sort of prices he asked for the other service data, it makes a certain very large technical manual company look cheap. Anyhow, I would not have wanted to waste your or his time, the data I've gathered from my own sources will be more than sufficient to allow me to maintain the set. Enjoy your lay in.

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Topic starter Posted : 23/10/2016 10:09 am
Marcus 3700
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Hello Chris,

I'm not sure what you mean being "fleeced" my friend sold a working Aphelion in red to a guy in Italy and sold him all the manuals for £100 including service manuals from the "colour centre" regarding construction of sets using chassis G11 and Grundig and Saba by Stephen Foster.

My friend only wanted £25 for all the "colour centre" London manuals regarding G11 poster plus audio cassette dated 1977 and all the Telefunken 712 Alphelion service manuals (some in German) The £500 price was for the working set and the £100 was for the molding design sets and service dated that he sold to the guy in Italy.

Marcus.

 

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Posted : 23/04/2018 4:07 am
crustytv
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Hi Marcus, long time no see.

Wow! that post was made 18 months ago, none of what you've just explained now, was made clear to me back then. Incorrectly I thought he wanted in the region of £100 for said manuals not just £25, which is of course reasonable.

Lot of stressful things going on with my life back then both personally (bereavement and probate troubles) and forum wise, not a good time is an understatement. Its not surprising I got muddled, all very academic now, plenty of water has travelled under the bridge and times are once again tranquil.  ? 

Trust you're keeping well and still tinkering with all those sets of yours.

 

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Topic starter Posted : 23/04/2018 6:51 am
Marcus 3700
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Hi Chris,

You are correct I had a look in my old diary and the manuals he still had came to a weight of over 23 kg a huge amount, a lot of it was duplicates, quite a lot of it was in German that's what he wanted £100 for. I did grab the Telefunken ones in new condition, but I think they are at my house in East Yorkshire I'll have a look for them.

Sadly not looked at or purchased any sets for a while, my parents have not been well too. I did get them Bradford 1830 sets, Two of them are here and one at my house. I got two for member Aidan Lunn ? I think that's his name, but when I messaged him he never replied then your old forum closed, so not sure if he ever read my message. I have removed a rusty doubler from one of them for Tas, but I have yet to send him.

   

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Posted : 30/04/2018 12:28 am
crustytv
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Five posts re Decca CS1830, split off to a new thread here

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Topic starter Posted : 30/04/2018 12:35 am
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