TA-377A Complementary Symmetrical FET Pre Amp - diyAudio
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Old 1st August 2007, 12:00 PM   #1
AMV8 is offline AMV8  United Kingdom
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Default TA-377A Complementary Symmetrical FET Pre Amp

I recently aquired a TA-377A Pre amp.

For those not familiar with the pre amp it consists of a regulated power supply, a line stage and a phone stage. The line stage and phono stage are complementary and symmetrical FET designs.

It sounds like it could be very good and I am presently improving the capacitors to try and make it even better.

However I would like some information if anyone can help.

1) Does anyone know of any articles or threads on this pre amp. I have searched this forum and google but did not find any.

2) the fets are listed as 2n3268 (J40) and 2n3269 (K81). I can not find any specifications for those. Does anyone know these fets?

Any help appreciated.

Don
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Old 2nd August 2007, 05:27 PM   #2
KaLok is offline KaLok  Hong Kong
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Is it a kit from Hong Kong?
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Terence
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Old 2nd August 2007, 07:15 PM   #3
AMV8 is offline AMV8  United Kingdom
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Hi KaLok

I bought the pre amp second hand. However I believe it originated in HK. Although a company in the US - Mark5 - also sell the pre amp as a kit or ready assembled.

I have been playing with the pre amp some more and now it really is delivering very high quality sound so I am keen to find out more if I can. Are you able to help?

Don
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Old 4th August 2007, 04:31 PM   #4
KaLok is offline KaLok  Hong Kong
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I will looking for my data.
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Old 5th August 2007, 02:42 AM   #5
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Hi Don,
those J-FETs are probably 2SK81 and 2SJ40, old fashion devices.
What is your intention?
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