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Old 16th February 2014, 10:35 PM   #1
6JohnS is offline 6JohnS  United States
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Default Threshold Cas-2

I just got back the exact Threshold Cas-2 amplifier I owned back in the early 80's. Unfortunately if has some blown output transistors. I don't have a schematic and it seems impossible to find one. I would be very grateful if someone could get one to me or post one somehow. I am interested in finding the proper transistors to put back in it. My amp currently has 4 different numbers and I don't know which ones are correct, if any? I would very much like to get this amp operational again and any help I can get would be greatly appreciated. Thank You.
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Old 16th February 2014, 11:13 PM   #2
llwhtt is offline llwhtt  United States
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Try the next forum down on the menu, PASS LABS, might have better luck there. There was a whole list of Threshold stuff a few days ago.

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Old 16th February 2014, 11:25 PM   #3
6JohnS is offline 6JohnS  United States
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Thanks for the quick reply but I have already searched all the forums I can find and no schematic exists. A schematic would be awesome but if anyone knows which transistors this amp uses I could get some on order or a direct replacement if the originals aren't available any longer. Thank You
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Old 17th February 2014, 12:09 AM   #4
Zen Mod is offline Zen Mod  Serbia
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ask in PL forum

write down transistor numbers and Papa will tell you
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Old 17th February 2014, 12:56 AM   #5
6JohnS is offline 6JohnS  United States
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Here's a list of the transistors I currently have installed. There are 2 boards that hold 10 transistors each. 1 board for each channel. The forward board which is the right channel has (5) 2N6339 on the left side of the board and the Left channel board (rear board) is exactly the same. The right channel board on the right side has (4) 2N6437 and (1) 2N6438. The left channel board has (4) 2N6437 and (1) unmarked. I don't want to buy or install the incorrect transistors and could use a professionals touch on what goes where. Thanks
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