Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  
previous: Willy Another one:How can... -- 1/15/2001 5:41 AM View Thread

Re: OC74 - 71 pinout id

1/15/2001 5:47 AM
Re: OC74 - 71 pinout id
Willy, All of the trannies you mentioned are equivalent to ECG102A , which is PNP Ge, technically the right general type for a Rangemaster. I couldn't find anything on 2Ac128, but if you meant AC128, then that equates to ecg158, another PNP Ge trans.  
All this was on the ECG transistor crosscheck database that I mentioned in another thread today.  
I have found that the red dot,[sometimes black dot] is usually the collector. Middle pin in the triangle is usually base.