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Old 29th March 2013, 01:32 AM   #1801
bcmbob is offline bcmbob  United States
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Oh, Oh - Me thinks I see a Dynaco PAT-4A.

I've been dragging mine along for years hoping to upgrade at some point. Most likely on a different thread or PM, but I'm curious about your use/intentions.

We want more pictures once you get a project started.
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Last edited by bcmbob; 29th March 2013 at 01:34 AM.
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Old 29th March 2013, 01:40 AM   #1802
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Quote:
Originally Posted by bcmbob View Post
Oh, Oh - Me thinks I see a Dynaco PAT-4A.

I've been dragging mine along for years hoping to upgrade at some point. Most likely on a different thread or PM, but I'm curious about your use/intentions.

We want more pictures once you get a project started.
Intentions? Probably to sell the 3 PAT-4s I have, along with their original wooden cases(!). So many toys, so little time, and so little space.

Don't know what my next audio project will be. I do have the makings for some large panel electrostatics, and that may be next--but first, I have two "project cars" I'm working on, and I need to finish them before I feel guilty for neglecting them.....!
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Old 29th March 2013, 01:51 AM   #1803
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Will your next project car AND Pass Amp be painted to match in Gulf livery?
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Old 29th March 2013, 02:05 AM   #1804
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Quote:
Originally Posted by overtheairbroadcast View Post
Will your next project car AND Pass Amp be painted to match in Gulf livery?
More like orange. Like, Bruce McLaren's Can-Am car orange(!)
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Old 1st April 2013, 09:41 AM   #1805
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Default A40 Monoblocks Complete.

At last the A40s are finished! The sound from these is EPIC, simply stunning. Huge soundstage, super sweet treble and pile driver bass with superb grip and control (no doubt aided by the use of a 500VA toroid with 44,000uF per channel). If anything these are a perfect lesson in how power ratings can be misleading; the power amp they replace is rated at 100 watts per channel (an Audiolab 8000P which is very nearly 26 years old) and these monoblocks just blow it into the weeds. I was wondering, when I was building them, if there would be enough power for my KEF Q7s!
I have not driven the amps to clipping because the Q7s sound like they might burst and also my ears wouldnít stand any more volume. What is also amazing is how effortless and relaxed the sound remains at this volume. Another plus point is that the sound is every bit as good at very low volumes too. All in all I am absolutely gobsmacked by the magnitude of the improvement over my old amp (the KEFs sound amazing when driven properly with a quality signal) and Iím still using the Audiolab preamp (8000C) with the A40s, but not for long because Iíve just received a B1 buffer preamp PCB with matched JFETS from Pass Diy.

Eric, thanks for your comments after my previous post, I really enjoyed reading your website.

Regards,

Earthloop.
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Old 1st April 2013, 11:24 PM   #1806
Fusor is offline Fusor  United States
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Beautiful A40. I built one 30 years ago, although not as nice as yours.
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Old 2nd April 2013, 01:50 AM   #1807
Eric is offline Eric  United States
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Earthloop - VERY nice mono blocks! They look great and evidently they sound great as well! Congrats on a nice looking build. I've been very pleased with mine and still listen to it nearly every day. Glad to hear you found my web page of some value.

Eric
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Old 2nd April 2013, 09:44 AM   #1808
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Quote:
Originally Posted by Blink_PT View Post
Wrong.

At the rear has no fan. Just got the grill.

On top the fan is to extract air out.
Has anyone noticed that fans (at least, all the ones I've seen until now) blow air in the direction of the sticker/frame? So, as seen in the pictures, that fan is blowing air into the case from the top cover.

Have you checked that?

Quote:
Originally Posted by AndrewT View Post
A fan or pump always works more effectively "blowing" the fluid.

A fan in the bottom of a case blowing up will perform better than a fan mounted on the top sucking up.
Just out of curiosity, then why almost all elec. equip. use to mount fans sucking air out of the enclosure?
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Old 2nd April 2013, 10:00 AM   #1809
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Quote:
Originally Posted by Earthloop View Post
[SIZE=3][FONT=Calibri]At last the A40s are finished!
Weight per amp?

Regards zeoN_Rider
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Old 2nd April 2013, 11:54 AM   #1810
john65b is offline john65b  United States
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Air conditioner condenser fans are mounted on top, sucking air through the coils, as are computer CPU fans, but this may be because of existing geometry.

To me, it is alway's best as Andrew indicates, pushing air instead of sucking air. Sucking air always has the detriment of hot air cooking the fan internals too...
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