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Dsavitsk/Beezar Torpedo Build Thread - Page 15

post #211 of 635
Form factor is the same. Basically we switched to a new and much nicer power transformer. This required altering the power supply a bit and moving some components around, but we were careful to keep the tubes and all panel components in the same spots, so the case won't change. We are hopeful that this fixes the hum issue -- though, I should reiterate that the hum issue is really less of an issue than I think people believe.
post #212 of 635
Thread Starter 

 

Quote:

a new and much nicer power transformer

= toroid. wink.gif

post #213 of 635
Quote:
Originally Posted by dsavitsk View Post

I should reiterate that the hum issue is really less of an issue than I think people believe.

I agree that is true for low impedance cans using the low impedance tap, especially grado's. Using high impedance cans on the high impedance tap, like an HD650, makes the issue more pronounced. At least on my build.

Looking forward to seeing the changes.
post #214 of 635

Any updates? Thanks atsmile.gif

post #215 of 635

I demand updates ... summer is here and I need a new project !!!!!!!!!!!! biggrin.gif

post #216 of 635

The natives are restless... 

 

And rightly so. The current version, with the lid off, is THE go-to Grado amp for me.

 

Something about it and the HF-2's. The amp just disappears and the music comes to the forefront, as should be. An almost organic quality to the pairing. A most excellent combination. That much is for sure. 

 

Makes you wonder how far a parafeed design can take you....

post #217 of 635
Thread Starter 

The new transformer is in hand, along with the PCB's.  I have the parts on order.  So, it should only take a weekend when I'm free to have some results. smily_headphones1.gif

post #218 of 635
Quote:
Originally Posted by dsavitsk View Post

Form factor is the same. Basically we switched to a new and much nicer power transformer. This required altering the power supply a bit and moving some components around,

 

Quote:
Originally Posted by tomb View Post

The new transformer is in hand, along with the PCB's. 

Does the BOM currently appearing on DIYforums.org and the current PCB on beezar reflect the changes to power supply and power transformer Doug is talking about? I just wanted to make sure before I submit an order with Mouser.

post #219 of 635
No, not yet. Tom has been super busy lately, so we are still in a holding pattern. We'll update this thread as soon as we have tested and approved the changes.

To be more specific, the version with the toroid, assuming all goes well, will lose the choke, and the PS cap complement will change a little.
post #220 of 635
Thread Starter 

I am building it this weekend, hell or high water!!

 

Yes, we have both been busy.wink.gif

post #221 of 635
Thread Starter 

OK - I got almost everything done except the big stuff, and I'm only waiting on C3.  Mouser backordered it on me but I never noticed because I was concerned about the NJM regulator.  I got that from Dsavitsk, but I have a different C3 on order and it's already shipped.  So, it should only be a couple of more days ...

 

EDIT: C3 is a 50uf 400V cap on the V2 PCB. wink.gif


Edited by tomb - 6/18/12 at 4:22pm
post #222 of 635
Pics TomB, pics!

The masses, including myself, are starving!

biggrin.gif
post #223 of 635
Thread Starter 
Quote:
Originally Posted by jdkJake View Post

Pics TomB, pics!
The masses, including myself, are starving!
biggrin.gif

I am only waiting on C3, the coupling caps (both in transit), and installing the transformer.  I'm saving the transformer for last, because I didn't want that shotput flexing the board while I still have parts to install.wink.gif

post #224 of 635

I really enjoyed building my first one, it's easily the best amp I've heard in it's price range. Dsavitsk, would a balanced drive option be worthwhile running two of these new boards in parallel... or would it be an act of pointlessness?


Edited by HiGHFLYiN9 - 6/27/12 at 12:31pm
post #225 of 635
Thread Starter 

I can't answer the specific question you've posed to Dsavitsk, but you may enjoy seeing these:

TorpV2-1-640x480.jpg
TorpV2-2-640x480.jpg

 

EDIT: Fixed 2nd pic link ...


Edited by tomb - 6/28/12 at 3:34pm
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