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Old 17th November 2009, 08:39 PM   #1171
lgreen is offline lgreen  United States
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Default "ExtremA"

Just a quick couple of pics.

Link to original article thread- Original diyaudio thread.

Link to my build thread- My "ExtremA" is Built. Whew.

FYI, this is a a class A amp, 70 WPC fully differential with a bridged output.

Amp Operating.
Click the image to open in full size.

Top Cover Off.
Click the image to open in full size.
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Last edited by lgreen; 17th November 2009 at 08:52 PM.
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Old 18th November 2009, 12:46 AM   #1172
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My latest project.

100W Class AB amp.
Complementary symmetric differential input using current mirrors.

Link to development thread
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Old 18th November 2009, 12:49 AM   #1173
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Quote:
Originally Posted by danfo098 View Post
My latest project.

100W Class AB amp.
Complementary symmetric differential input using current mirrors.

Link to development thread
Did you thread the heatsink for the bolts or did you put bolts through with nuts on ?
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Old 18th November 2009, 12:56 AM   #1174
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The heatsink is threaded. The nuts are just spacer substitutes.
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Old 18th November 2009, 02:06 AM   #1175
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Very nice, Danfo...
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Old 18th November 2009, 11:33 AM   #1176
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Hello Friends.
Steeve here from United States, I feel so glad to see some of the most wonderful and interesting pictures posted here in this group. Really great work by all you guys and I do appreciate your efforts. Can you please post some more pictures specifying the circuit designs too.
Thanks for your post and stay connect.
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Old 19th November 2009, 06:18 PM   #1177
grube47 is offline grube47  Belgium
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Quote:
Originally Posted by radio View Post
Hello All!
Thebes me reliable audio amplifiers (scheme and PCB), which will be powered with the Us=±55...60V.Output transistors to be in the TO-3 housing (as MJ15003/MJ15004, etc..)
Thank you,
[/QUOTE]

Here
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Old 20th November 2009, 04:25 PM   #1178
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my JLH 1969 based on the chinese PCB.
the 2N3055 are installed by the heatsink out of the case.
transformer ex CCCP military surplus 22v, bridge rectifier 50A + 20000uf/50v capacitor+ 1Ohm 15W resistor + 120000uf/50v capcitors.
drive very very well my FR saba greencone + TW saba greencone open baffle.
sound great.
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Old 22nd November 2009, 10:09 PM   #1179
nikwal is offline nikwal  Sweden
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almost finished..

Inputs and outputs are now mounted and connected below the power connector.

(it might look small, but it's by no means weak)..
Attached Images
File Type: jpg my-amp.jpg (116.8 KB, 1501 views)
File Type: jpg my-test.jpg (102.7 KB, 1389 views)
File Type: jpg my-system1.jpg (62.2 KB, 862 views)
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Last edited by nikwal; 22nd November 2009 at 10:12 PM.
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Old 23rd November 2009, 03:21 AM   #1180
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Quote:
Originally Posted by lineup View Post
thanks Cal Weldon
PMA always have some interesting stuff!
Even if sometimes, I would do circuitry in another way = my way

Taste is different
Some like to drink beer .. other sip their wine .. or get drunk on Whiskey instead
Some listen to tubes, others take on MOSFETS, while the most common output devices STILL Are those faithful old BIPOLARS
Taste is personal


lineup


I have two dc 300a amps on my equip and I dont want it any other way from crown amps
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