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Old 24th Apr 2009, 4:49 pm   #19
geofy
Retired Dormant Member
 
Join Date: Jun 2006
Posts: 1,798
Unhappy Re: Roberts RT7 - problem

Quote:
Originally Posted by stonehopper View Post
The malfunctioning OC81's are a full inch in length, two wires insulated red and black, in an all metal cylinder. Oooer.
A picture or two would be helpful as too much guesswork is going on. The two wire black and red sound more like a diode such as the AA series which is used in some biasing arrangments.

The bare leads of the OC81 are collector, (with a paint dot near it) then the middle base, and then emitter. You will need to familiarise yourself with these as you have already said you haven't a clue what they mean.

Geof
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