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Old 29th August 2011, 09:22 AM   #531
styrkv is offline styrkv  Norway
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How do you make the thumbnails that pops up to full size when one clicks on it?
I`m not a computerwisard either.
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Old 29th August 2011, 09:24 AM   #532
AndrewT is offline AndrewT  Scotland
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I think it is simply a case of "manage attachments".
DIYaudio does it for you.

Compress your file from .BMP to some other that gives good definition and small file size. Try .PNG
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Last edited by AndrewT; 29th August 2011 at 09:27 AM.
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Old 29th August 2011, 09:38 AM   #533
styrkv is offline styrkv  Norway
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Thank you Andrew T.

I`ll try it.

Have you looked at the schematic?
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Old 29th August 2011, 09:52 AM   #534
styrkv is offline styrkv  Norway
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I try again.
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File Type: png SSA BJT EC AMPLIWIRE png..png (9.9 KB, 940 views)
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Old 29th August 2011, 10:13 AM   #535
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Exclamation SSA BIGBT Basic PWS

Quote:
Originally Posted by Idefixes View Post
Lasy car you have treasur of transistors. I look around and 2sa1478/2sc3788 are quite difficult to find...
How have plan to provide +/-60V ?

Marc
Yes I know, they are special transistors. Look to BF471/472, BF871/872, 2SC2911/2SA1209 or similar TO-126, 60MHz and higher transistors.

Here's how you get +/-60V.

P.S. I am a Lazy Cat not a car.
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Last edited by Lazy Cat; 29th August 2011 at 10:26 AM.
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Old 29th August 2011, 10:55 AM   #536
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Quote:
Originally Posted by styrkv View Post
Thank you Andrew T.

I`ll try it.

Have you looked at the schematic?
Hi styrkv

Your sch looks very promising, if you calculated all stages bias currents it will work. SSA front-end will do the job.
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Old 29th August 2011, 11:29 AM   #537
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Quote:
Originally Posted by styrkv View Post
I`m in the prosess of building a Amp with this output, ( bought and matched transistors)
but I`ll be happy if I can use SSA instead of the complicatet Electrocompaniet schematic.
SSA is very simple front-end, symmetrically low-Z GND referenced, consequently resulting in low noise, high stability, minimal DC offset and because of the CF loop, very high speed.
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Old 29th August 2011, 11:40 AM   #538
styrkv is offline styrkv  Norway
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Thank you Lazy Cat.

It`s not fully tested for biascurrents for the front with the higher rails, but I`ll make myself a inputcard and try it out.
The output schematic is from Electrocompaniet AW 120 DMB, with one extra op-pair and emitterresistors
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Old 29th August 2011, 11:56 AM   #539
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Lasy Cat, sorry for your mistaken name....and thanks for answer. 50V. 0.5A per rail are the just power rating Or it could be less? I haven't tranny with so such output but i have 2 nice Rcore 500va 2x36V...

Marc
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Old 29th August 2011, 12:02 PM   #540
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Quote:
Originally Posted by styrkv View Post
Thank you Lazy Cat.

It`s not fully tested for biascurrents for the front with the higher rails, but I`ll make myself a inputcard and try it out.
The output schematic is from Electrocompaniet AW 120 DMB, with one extra op-pair and emitterresistors
SSA's front-end collector current is not rails potential dependant as long as they are higher than 15 V. The only limiting parameters are cascode BJT's Vcemax and Pmax.
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