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Old 18th January 2013, 10:26 AM   #71
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Join Date: Feb 2003
Location: West Coast of Norway
I have 4 symef boards coming this way and still haven't started the 1diffqc build yet. Maybe you can have a couple of boards from me if I only need 1 pair.. ? It depends on my relatives that also want a great poweramp.
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Old 18th January 2013, 06:25 PM   #72
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Originally Posted by bambadoo View Post
No problem with mac either...
Thanks for update
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Old 18th January 2013, 06:27 PM   #73
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Originally Posted by Liliya View Post
It is a pity that I have not discovered this thread earlier. I was ver pleased with the listening results of my first build of the SYMEF amplifier, and I would be very happy to built a second one, but I see I am to late to have a set of PCB v. II
Harrison, I will wait for your next project that you told us in your last post in the SYMEF thread.
I stll have not finish my 1DIFFQC project, due to a stupid failure I did. A couple of TIP 142 went to "heaven". Repairing was set on hold because of a "house project" (painting) before Christmas.
For the time I am finishing my variotrafo project. As soon as I am throuh with this, I will give 1DIFFQC a new try. I hope to come back with a short listening test to 1DIFFQC compared to SYMEF.

Eivind Stillingen
Looking forward Liliya,

Thanks again, Harrison.
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Old 18th January 2013, 06:40 PM   #74
brianco is offline brianco  Ireland
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Join Date: Aug 2005
Location: Scottish Borders - Kelso; on the famous Tweed River!
Sorry for the fuss......I am running Fiefox19.0.2 - a beta test browser - and have now had similar problems with their new .pdf viewer. Save a .pdf and it gives a message saying "damaged file". [I'd just managed to get them to print when the ink ran out ... totally forgot to reorder - so it will be a few days before I receive some. Our local town is a one horse town and that died last year!.....beautiful countryside though.]
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Old 18th January 2013, 08:01 PM   #75
Liliya is offline Liliya  Norway
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Location: 3370 Vikersund

Thanks. When you know for sure, let me know.

Eivind Stillingen
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Old 22nd January 2013, 01:37 PM   #76
ief is offline ief  Netherlands
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Join Date: Jun 2011
Default Tnx!

Received the pcb's yesterday, for me as well it will probably take some time to start and finisch, transformers on the way though

Tnx again!
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File Type: jpg pcb.jpg (148.9 KB, 136 views)
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Old 22nd January 2013, 01:51 PM   #77
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Join Date: Jan 2004
Originally Posted by OnAudio View Post

1. Place unpopulated PCB on heat-sink.
2. Use ink to mark the lead positions on the heat-sink.
3. Place transistors on heat sink with the pins bent straight up
4. Align the transistors leads with the ink marks
5. Use ink to mark the mounting holes of each transistor
6. Drill mounting holes
7. Mount transistors
8. Populate PCB
9. Place PCB over transistors
10. solder the transistors
thank you for the explanation.
IMHO, this is not a practical way.

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Old 22nd January 2013, 02:06 PM   #78
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Join Date: Nov 2011
got the PCB's.

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Old 22nd January 2013, 02:35 PM   #79
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Hi Guy's

Just seen the thread.

Don't suppose there are any boards left are there?
I would like to build this amp if poss.

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Old 24th January 2013, 07:04 PM   #80
VT67 is offline VT67  Belgium
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Location: Belgium
Received my two boards today.
Still not really convinced about the location of the transistors and how to mount them onto a heatsink.

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