Trident oscillator neon bulb ?

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nielsk

Well-known member
Joined
Nov 12, 2004
Messages
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Megapopulas, Florida
I am working on a Trident Trimix, the oscillator is not functioning. It is missing a component, "TH 1, -t*" which seems to be a neon bulb in the feedback loop. Of course, the schematics show NO component values (WTF), has anyone a clue what this thing is? 120 volt neon?
There is also what appears to be modification to the output of the oscillator, undocumented of course, but I figure getting it to function as originally intended is a good place to start...

Thanks!
 
Not a neon. Was probably an NTC thermistor like these... http://www.farnell.com/datasheets/66949.pdf
No longer available I'm afraid. Maybe the mod was trying to get it to work without it.
 
I used to have a trimix.  Definitely is a thermistor.  I think this is the one

http://www.ebay.co.uk/itm/Stantel-Vintage-Bead-Thermistor-R53-to-Wien-Bridge-Sinewave-Oscillator-STC-R53-/201277699163?pt=UK_Collectables_RadioTelevision_Telephony_SM&hash=item2edd15f45b
 
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