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Can I replace a 2SC1969 with a 2SC2312?

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Old 03-14-2012, 07:05 PM
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Default Can I replace a 2SC1969 with a 2SC2312?


I have a very old side mic 148 that appears to be in need of a final. I dont have a replacement 1969, but I have a few old 2312's. Can I just do a straight swap? If so, should the final bias be set to 50 mA like the stock 1969?

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Old 03-14-2012, 07:20 PM
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Yes it will work as a straight up swap. And ... yes set the bias to 50ma like the stocker.

- 399

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Old 03-14-2012, 08:28 PM
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yes and the 1307 will swap too
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Old 03-15-2012, 06:33 AM
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a 1307 or a 477 will do also...73 de JW
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Old 03-15-2012, 06:41 AM
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Quote:
a 1307 or a 477 will do also...73 de JW
A word Caution
You can replace a 1969/2312/1307 with a MRF 477, BUT the Base/Emitter/Collector pin out is not the same.
Pins # 2 & 3 must be crossed, and insulated with a small pc of heat shrink to prevent them from shorting.
1306/1307 driver/finals are rare as hen`s teeth to find nowadays, they have not been made for a very long time.


73
Jeff
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Old 03-15-2012, 09:46 AM
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Default thats right,

the do need crossed...been so long since i fooled with trans...i like glass,tubes...73 de jw
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Old 03-15-2012, 12:59 PM
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Thank you all!

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Old 03-15-2012, 06:22 PM
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DE NADA.

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