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DMcMahon · 30th Mar 2020, 4:25 pm

Thank you Julie for this useful information.

Not seen a bulb protecting the motor winding in these old units before.

Operationally the bulb is used as an indicator (shines up through a hole in top panel) to show that "Fast Wind" is selected. Fast Wind is a position on the rotary Play/Record/Stop selector and is mechanically interlocked with a Fast Wind mechanical selector which selects Fast Forward and Rewind, i.e. you cannot select FFD or RWD operation until you first select "Fast wind".

I borrowed a suitable/similar bulb (7V/0.5A) from my TK 35, it is working fine in the TK 5, but not that good as an indicator in the TK 5 because it has a blacked out curved end.

I have ordered a couple of spare bulbs.

Checked DIN line recording, all working well, for > 60 years R2R non Hi-Fi, it sounds quite good to my ears.

Now am doing a bit of cleaning up, lubricating and will check humdinger set-up before putting it all fully back together. Also trying to find some wax crayons to colour the selector switches lettering/icons.

30th Mar 2020, 4:25 pm	#56
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,600	Re: Grundig TK 5 Restoration Thank you Julie for this useful information. Not seen a bulb protecting the motor winding in these old units before. Operationally the bulb is used as an indicator (shines up through a hole in top panel) to show that "Fast Wind" is selected. Fast Wind is a position on the rotary Play/Record/Stop selector and is mechanically interlocked with a Fast Wind mechanical selector which selects Fast Forward and Rewind, i.e. you cannot select FFD or RWD operation until you first select "Fast wind". I borrowed a suitable/similar bulb (7V/0.5A) from my TK 35, it is working fine in the TK 5, but not that good as an indicator in the TK 5 because it has a blacked out curved end. I have ordered a couple of spare bulbs. Checked DIN line recording, all working well, for > 60 years R2R non Hi-Fi, it sounds quite good to my ears. Now am doing a bit of cleaning up, lubricating and will check humdinger set-up before putting it all fully back together. Also trying to find some wax crayons to colour the selector switches lettering/icons.