Grundig/Philips AG1025 spring mystery

[brymac]

It is the shorter coiled spring almost exactly half way between the pink and red markers. It is hooked through the same hole as part 24 in the schematic...... and sits above "my" spring.....

Bryan

[ms660]

Originally Posted by brymac

It is the shorter coiled spring almost exactly half way between the pink and red markers. It is hooked through the same hole as part 24 in the schematic...... and sits above "my" spring.....

Bryan

That looks like spring 20.

Lawrence.

[G6ONEDave]

That part that you are pointing to looks like one end of item 103a (bent wire) on the diagram. There is a spring 105 on the diagram that goes to the pinch at one end of 103a. The other end of 103a is labelled 'k' and goes to a slot in the sub chassis, sorry could not find a part number on the diagram for it but it's the long plate that the centre spindle sits on.

Springs 64 and 104 are both sort of semi-circular horseshoe shaped, which is what I understood was where the problem was, sorry about that.

Dave

[brymac]

Thanks Dave, but it's not 103a either....

This morning I approached the problem from the other end of the telescope by working out what the horseshoe shaped spring actually does and replacing it with a coiled spring. See photo attached. In effect, it simply makes the speed change shift a bit more positive.

If you look carefully at the original diagram (section enlarged and attached), you'll see that there are 3 springs attached to the lug which is bent up from the chassis (see attached) and on the service sheet those are all coiled springs. Their ends are marked "b" and "e" and my rogue spring (24) isn't marked at its ends as it is already in place.

My guess is that this was a mod. which was put into effect when Grundig rebadged this deck for their Mandello radiogram (which is what I am restoring for a customer at the Repair Cafe I run). In the course of freeing up the seized idler wheel, it popped off and I shall never know where it is supposed to fit!!

I think I'll draw a line under this now and focus on the slightly imperfect output from the gram side of this one - capacitors here I come.....!!

Thanks again to those of you who have got alongside me with this vexing problem. The moral is, as always, photograph everything before taking it apart!!

Bryan

[ms660]

https://archives.doctsf.com/document...3935&ref=29677

Lawrence.

[brymac]

Ok - I'll remove my coiled spring!!!!

Amazing - thanks Lawrence!!!!!

I have no idea how you found that - but it turns out its is part 78 on a variant of the same deck. How very Philips....

Thanks again,

Bryan

[ms660]

Yes, see Post#5.

Lawrence.

[brymac]

Indeed - interesting that it appears on a much later deck than mine.

Sorry to have not paid more attention to post 5...

Bryan

[G6ONEDave]

You would think that the drawing numbers shown for specific deck would remain the same through the various versions. Item 78 in the Philips AG1025 service manual dated October 1963 is actually the mains switch that's fitted on the deck. The middle photo shown in your post 24, is actually the same as item 64 in the manual drawing, although it could be in a different location on later versions.

Dave

[brymac]

Thanks Dave - you will all be delighted to hear that it is now working perfectly...!

Bryan

[Drroberts1952]

Just to go off track for a minute. Does any know where you can get a replacement rubber drive pulley for the AG 1025. I’ve got one of those fitted to a Grundig KS 520 WE. It plays but is skewing badly. Any help appreciated thanks
PS I can send some internal pictures of mine but I can’t quite understand the spring you are referring to

[brymac]

Thanks - deck is now fixed and back with its owner.

Happy to help with the drive belt once I get back from holiday next week. PM me to remind me please!! Bryan