Inductance of 2600 sound encoder coil?

[tearex]

Hello to you all,

 

does anybody here happen to know the (rough) inductance in µH for the adjustable sound sub-encoder coil of a PAL-B six switcher 2600 (L201 in most schematics)? During adjustment, I managed to crumble the stuck ferrite slug in in mine into a heap of small pieces, no chance of getting them together again... So I'll have to replace it. I'd rather replace the whole coil than to hunt high and low for a slug of exactly the right size and type of ferrite.

 

The µH value is not given on any of the schematics I found, nor did I manage to find any reference to it in the forums. That's why I'm asking here.

 

In case this helps somebody calculate the size, the circuit will have to output a 5.5 MHz signal to work in the German PAL-B TV norm. I know too little about circuit design to calculate the value myself.

 

Many thanks in advance for any help!

Edited April 1, 2009 by tearex

[tearex]

To answer my own question - according to the estoreoutwest.com website it's Atari part number C010823 and it's adjustable between 0.85 µH and 1.2 µH. The coil seems to be the same between NTSC and the several PAL variant boards, probably it was easier to change the fixed inductor L202. Shouldn't be too hard to get (or make) one with that information.