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Old 8th December 2010, 01:49 PM   #441
Zen Mod is offline Zen Mod  Serbia
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that's neat!

my kind of ppl

try some 0,1mm non shielded for signal wiring - route them away of xformer
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Old 11th December 2010, 02:30 AM   #442
Chad is offline Chad  United States
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Default Pass Burning Amp

Here are a few pictures of my completed BA-2 and BA-1. It has a separate PSU enclosure. Its kinda hard see in the pictures(when the room lights are on) but the Pass logo is lit red (burning) when the amp is on. I mounted a toggle switch, to switch between the 2. I find myself listening to the BA-1 more than the 2. Both sound better than any amp I've owned, but I really like the BA-1. It is my first single ended amp.


Chad
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Old 11th December 2010, 08:15 AM   #443
massimo is offline massimo  Italy
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Cool! A real "double face" amp!
What connector have you used for the high current PS? Wire gauge?
Can't see the toggle. Does it switch the +/- V?
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Old 11th December 2010, 09:44 AM   #444
Zen Mod is offline Zen Mod  Serbia
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great looking !

not exactly serviceable layout , but impressive for anyone to whom electronic isn't day job

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Old 11th December 2010, 01:53 PM   #445
Chad is offline Chad  United States
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Massimo,

Its a 4 pole plug/receptacle made by Cole Hersee rated for 30 amps DC. The PSU to Amp cord is 12 ga tinned wire. The toggle switch is located on the back of the amp enclosure, it is a double throw dual pole switch, that switches the V+/V-. You can kinda see the power connector in the power supply picture.


Zen,

Yes, it did get a little more crammed than I had envisioned in my head. I made it so all the DC offset adjustments and the bias on the BA-2 was easy to adjust. The BA-2 boards are on the top, so they are easy to take measurements. If the BA-1 ever acts up I will have to do some disassembly to troubleshoot it. Not a big deal except cleaning and redoing the Mica and Goop.
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Last edited by Chad; 11th December 2010 at 01:55 PM.
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Old 11th December 2010, 07:20 PM   #446
Blues is offline Blues  United States
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Very coool Chad...I like the finish on the wood. A beautiful temple for the jfets? How did you do the Pass logo part?
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Old 11th December 2010, 07:36 PM   #447
hags is offline hags  United States
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Ok, now that is original thought and implementation. Wow!


Quote:
Originally Posted by bykoz View Post
MY F5 tower

Pic 16f628 remote control, (power on/off, volume and input selector).
UPC 1237 protect.
OPA 2134 preamp, LME 49600 buffer.
2x47000 uf kendeil, 2x15000 nichicon
300w 2x18 toroid transformer.

thanks NELSON PASS.

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Old 12th December 2010, 01:18 AM   #448
Chad is offline Chad  United States
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The logo is reversed engraved in a piece of 1/4" plexiglass. That way the front feels smooth. It is edge lit with red led rope light that is rated for 24v DC. The back has a piece of brushed alum. against it to give it the silver look and direct the light thru the logo. I plan on doing a similar enclosure for my F5. I already have the plexi engraved with the Firstwatt logo. When I put it together I will take a few pictures of the process. The wood is Bubinga finished with a 2 part Dupont marine finish. (Yacht repair is my day job.) Yes, the jfets are in a nice home. What are we gonna due when you run out of them? I wish I could buy a bigger lot from you but between the wife and 3 daughters I always seem to have cut the hobby fund, so I get em as I need em and hope you don't run out.

Chad
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Old 12th December 2010, 05:34 AM   #449
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That looks like DYnamite! I love it.
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Old 13th December 2010, 01:39 PM   #450
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Bykoz, is that heatsink enough for 2 channels 1.3A each mosfet?
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