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Old 30th June 2010, 04:27 PM   #8281
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Yes your statement might also be true too.But you know that it is not a good think to use capacitor at the end point for life factors etc.And the distortion of capacitor increases by this way.
But you are using a very high quality sounded F5 Class A amplifier.This is a push pull class A amplifier.
So why not give some more ten bucks and use higher capacitance?When i add more capacitor i can easily see that bass and treble performance improves.
Some diyers/buyers give hundreds and thousands dollars for speaker cables/line filters but they do not know that increasing capacity(only some ten dollars) improves amplifiers performance more than they do
This is your philosphy.You can use whatever you use.We are both true.
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Old 30th June 2010, 07:01 PM   #8282
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Originally Posted by Electrolastic View Post
Why? so that you can use 25V caps
I have thousands of them.

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Old 30th June 2010, 07:04 PM   #8283
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Old 30th June 2010, 09:42 PM   #8284
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Quote:
Originally Posted by Russellc View Post
2sk170 and 2sj74 fets for the F-5 seem to be drying up. I guess there are some alternatives out there, I see Tech-diy is preparing to offer some kind of F-5 kit in August, what's available out there?

russellc
Anyone? I got more boards to stuff!

russellc
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Old 30th June 2010, 09:47 PM   #8285
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Russellc,
PM Diyaudio member Blues, he has well matched JFets for F5 available.
He has a thread for it, but I can't seem to find it. Him and tech-diy offer excellent service.
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Old 30th June 2010, 11:56 PM   #8286
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Quote:
Originally Posted by Russellc View Post
Anyone? I got more boards to stuff!

russellc
Russell:
eBay has listings for K170BL/J74BL (matched or not). Unless you want to try K246BL/J103BL, with which I am still struggling the bias.

Tea-Bag:
What kind of black tea do you like? I like the the kind from Ceylon(Sri Lanka).
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Old 1st July 2010, 12:33 AM   #8287
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Like Irish style Black Tea, Macha Green Tea, Twig Tea.
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Old 1st July 2010, 12:41 AM   #8288
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Quote:
Originally Posted by Russellc View Post
Anyone? I got more boards to stuff!

russellc
Quote:
Originally Posted by Tea-Bag View Post
Russellc,
PM Diyaudio member Blues, he has well matched JFets for F5 available.
He has a thread for it, but I can't seem to find it. Him and tech-diy offer excellent service.
Thanks for the alley-oop slam dunk T-Bag!

Russellc, please check out my signature below for the wormhole to the thread...
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Old 1st July 2010, 01:14 PM   #8289
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Thanks for the alley-oop slam dunk T-Bag!

Russellc, please check out my signature below for the wormhole to the thread...
Thanks you sirs!

russellc
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Old 1st July 2010, 05:20 PM   #8290
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... my work in progress

Click the image to open in full size.

Replaced the original UI core tranny by a torroid. Prepared the board with the resistors for the psu and also the caps, 22000uF/35V each.

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