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Old 6th May 2007, 02:09 AM   #81
MikeW is offline MikeW  United States
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A couple of amps. Mac 5100 on top of Krell clone, next to F1, next to triple gain clone, next to JLH.
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Old 6th May 2007, 02:36 PM   #82
MikeW is offline MikeW  United States
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A mofet A-40 bridged
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Old 9th May 2007, 08:14 PM   #83
AdrianW is offline AdrianW  United Kingdom
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As a new bod I'm sure my offering will not match up to the others on this thread, but hey, who cares? This links to my first post where the images are...

http://www.diyaudio.com/forums/showt...11#post1205011
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Old 9th May 2007, 08:26 PM   #84
luka is offline luka  Slovenia
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Hi AdrianW

Quote:
Any observations? Like 'why are the power supply caps different!'
HAHA good one. I realy would like to know how that happened, coz the diffrence in size is HUGE
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Old 10th May 2007, 11:42 AM   #85
AdrianW is offline AdrianW  United Kingdom
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Hi Luka,
explanation on the other thread (see link in previous post)...
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Old 21st May 2007, 08:44 AM   #86
Dr_EM is offline Dr_EM  United Kingdom
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Default Just a little project

Minature amp based on TDA2030AV chips. 160VA transformer 15+15VAC giving +/- 21V DC with rectification by 8A bridge and 4700uF smoothing caps. Circuit is standard design from datasheet constructed on stripboard, yet totally stable . All enclosed in an extruded aluminium case from Hammond which doubles up as a heatsink.

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Old 21st May 2007, 01:36 PM   #87
PMA is offline PMA  Europe
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My newly designed power amp:
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Old 21st May 2007, 03:42 PM   #88
lineup is offline lineup  Sweden
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Quote:
Originally posted by PMA
My newly designed power amp:
PMA
your new amp looks a "robust" construction

a new PMA idea or build is often something interesting

you think you can tell a few details, please
( I am not asking for a schema )
thank you

Regards
lineup


PS. you have tested this new one,
using your proposed testsignal for audio amplifiers? DS
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Old 21st May 2007, 04:28 PM   #89
PMA is offline PMA  Europe
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Hi lineup,

the amp has MOSFET output stage, and in principle is based on "Difference of 2 squares". The output stage has gain of 4. You can tell more from the attached image.

I have not tested it with the mentioned signal yet.
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Old 21st May 2007, 04:50 PM   #90
lineup is offline lineup  Sweden
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Thanks! .... so it is MOSFET output devices
From your second pic,
I see very compact build (not much space left!),
but on the other hand, very best use of the box internal space ( very short/minimum wiring )
with ONE Toroid in center to deliver ENERGY.

Nice and good work, of course.
( we do not expect anything else from Tjeckien .. and P.M. )

Like in Ice-Hockey, Tjeckien is often delivering good quality
... which many times can be trouble for Sverige,
Tre Kronor, 3 Crowns, Drei Kronen = The Blue and Yellow team: Sweden
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