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Old 19th January 2013, 12:33 PM   #31
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The picture on the Spencer's offer thread shows the real Toshibas, I can tell that the one I got had straight legs, not pre-bended... smells more and more fakes.
I'll try to get some from him. And when get them will check capacitance, resistors and volatges without the fets in order to check if they'll settle in the very same environment.
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Old 19th January 2013, 12:48 PM   #32
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You can trust in Spencer, I'm a happy customer.
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Old 19th January 2013, 03:42 PM   #33
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He asked me "You can select the idss you want" so what I do need?
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Old 19th January 2013, 05:13 PM   #34
osscar is offline osscar  Latvia
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i use about 8mA idss, but IMHO you can use any from BL range 6 - 10mA (if i remember correctly). In original Pacific circuit they use 5mA idss with 2k4 at drain and without source resistors.
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Old 19th January 2013, 05:16 PM   #35
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Thanks
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Old 22nd January 2013, 04:34 PM   #36
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You can use a higher Idss range, but that then requires the use of source resistors which may significantly increase noise. I was going to recommend 5mA Idss based on the value of the drain resistors, a lot of other good members beat me to the punch..
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Old 22nd January 2013, 06:40 PM   #37
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Hi Kevin, Spencer will send me matched 6.5mA ones, do I need to add these source resistors? In fact there are resistors everywhere, where can I add some more o_O
And if of any use I've put the amp on online circuit simulator.
https://www.circuitlab.com/circuit/g...riaa-prephono/
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Old 24th January 2013, 07:39 PM   #38
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Default Ready...

Here I'm FET-read... voltages all OK, I can only pray now... I've removed the 100R on each source, hope the Toshiba's won't oscillate!
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Old 2nd February 2013, 09:05 PM   #39
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A final thanks for support fellows, it's now working like a charm =)
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Old 2nd February 2013, 09:08 PM   #40
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