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KSC2690A and KSA1220A
KSC2690A and KSA1220A
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Old 20th August 2019, 05:26 AM   #101
R Dijk is offline R Dijk  Norway
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Join Date: Mar 2005
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Quote:
Originally Posted by bambadoo View Post
Has anyone considered nte2633/nte2634 (a bit low voltage) as VAS and nte373/nte374 as predrivers?

https://www.nteinc.com/specs/300to399/pdf/nte373.pdf

https://www.nteinc.com/specs/2600to2699/pdf/nte2633.pdf
Checked and tested the NTE373 and 374 but they behave badly in step and square.
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Old 20th August 2019, 07:54 PM   #102
woofertester is offline woofertester  United States
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Quote:
Originally Posted by R Dijk View Post
Checked and tested the NTE373 and 374 but they behave badly in step and square.
At voltage, at what current, and at what frequency do you test this? What was the load in terms of R/L/C? Did you swap a different transistor and see much better behavior? If so, what was that transistor?

This is the kind of test that I could replicate and capture screen shots.
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Old 20th August 2019, 08:58 PM   #103
voltwide is offline voltwide  Ireland
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These bjt obviously operate best around 500mA - too big dies for a VAS.
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Old Yesterday, 09:38 PM   #104
R Dijk is offline R Dijk  Norway
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Join Date: Mar 2005
Location: i live here
Quote:
Originally Posted by woofertester View Post
At voltage, at what current, and at what frequency do you test this? What was the load in terms of R/L/C? Did you swap a different transistor and see much better behavior? If so, what was that transistor?

This is the kind of test that I could replicate and capture screen shots.
Replaced output signal generator. Checked scope. Replaced with 2sc1220a big difference
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