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Old 10th February 2012, 11:19 AM   #111
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Quote:
Originally Posted by eyoung View Post
I'm wondering will the diode trick on the o/p mosfets source resistors benefit a stock F5...
Just wondering....E
I think so. As long as you readjust the whole amplifier from zero (drain impedance pots) again!
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Old 10th February 2012, 11:49 AM   #112
labjr is offline labjr  United States
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Quote:
Originally Posted by AndrewT View Post
there was a group buy of lsk170 etc about 2 to 3 years ago.
I'm wondering if they still make them? Are they the same as the Toshiba JFETS?
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Old 10th February 2012, 03:15 PM   #113
AndrewT is online now AndrewT  Scotland
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Yes, they make them.
No, they are not the same as Toshiba.
It states on the datasheet that they are a second source.
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Old 10th February 2012, 03:17 PM   #114
labjr is offline labjr  United States
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Quote:
Originally Posted by AndrewT View Post
Yes, they make them.
No, they are not the same as Toshiba.
It states on the datasheet that they are a second source.
Obviously they aren't made by Toshiba. But do they perform the same? Will they sound the same or not worth it?
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Old 10th February 2012, 04:27 PM   #115
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For these purposes they are fine. Actually, in our testing they fit all our
applications.

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Old 10th February 2012, 05:40 PM   #116
ra7 is offline ra7  United States
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Linear promised at BA-2011 that the p-channel counterparts would be out soon. Have not heard anything yet. That would be awesome for a pass diy point of view.
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Old 10th February 2012, 09:13 PM   #117
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Has anyone considered using FQA36P15 and FQA28N15?

Would they be suitable replacements for output devices?

Andy
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Old 10th February 2012, 09:38 PM   #118
Marra is offline Marra  United Kingdom
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Farnell stock them but the N channel device is U.S stock only.
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Old 10th February 2012, 09:45 PM   #119
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They are also stocked by mouser in the US.
I do an order every couple of months with them and they are far cheaper on these than Farnell.
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Old 10th February 2012, 09:48 PM   #120
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I be happy to suply any UK with FQA12P20 and FQP19N20
note the FQPis TO220 but it has been fine for me since last August

Let me know what you consider fair price and we take it from there.

For Farnell they charge £15 for USA stock whic is not bad but see post 11930
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