Right, we won't blame you if no enough pudding for everyone during BAF. 😛
Actually there is still time to offer suggestions to the pcb art, but it has to be today. Parts are not a problem and the "committee" consists of Mike and me. However, understand that the T shirt schematic is a simplification of the actual circuit and some of the issues mentioned have previously been addressed.
PSRR is better with the speaker ref to signal ground, providing there is not some other reason for wanting it where it is (proto was reasonably quiet either way though). C4 and R7 don't really do much. More to follow when I get back from my flying lesson. 🙂
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That T-shirt version, is it just me, or there a hint of JJ there?Actually there is still time to offer suggestions to the pcb art, but it has to be today. Parts are not a problem and the "committee" consists of Mike and me. However, understand that the T shirt schematic is a simplification of the actual circuit and some of the issues mentioned have previously been addressed.
Actually there is still time to offer suggestions to the pcb art, but it has to be today. Parts are not a problem and the "committee" consists of Mike and me. However, understand that the T shirt schematic is a simplification of the actual circuit and some of the issues mentioned have previously been addressed.
Hey! If we built the amp... do we get a T-shirt too?
They said "So long, and thanks for all the fish." 🙂
Ok, let's see:
Vgs turn on event looks ok, Vgs turn off event looks ok.
Turn off thump is minus a couple V / 20ms. Turn on thump fine.
If spk ref is changed to signal ground, then C3 filter cap should be across full B
Probably, we'll get a little pop when shorting the input, e.g. preamp mute or select
That's all I can think of without being home with the real things. 🙂
Vgs turn on event looks ok, Vgs turn off event looks ok.
Turn off thump is minus a couple V / 20ms. Turn on thump fine.
If spk ref is changed to signal ground, then C3 filter cap should be across full B
Probably, we'll get a little pop when shorting the input, e.g. preamp mute or select
That's all I can think of without being home with the real things. 🙂
I like the idea of graphics of your favorite NP, ZM, MR, MJ, and WC designs on t-shirts. Did I forget anyone?
Short answer: No. Slightly longer answer: I made the command decision to eat the Eventbrite fees this year, so we are a bit underwater with the Material Fee, so no room in the budget to include a t-shirt.
However Brian (bhjazz) is putting the final touches on a t-shirt design and I will have them on sale shortly.
-Tom-
If you are busily designing based on the t-shirt circuit, know that the real circuit has two pots in it. One sets bias, one does.......something else.
There is NO reason why you should be short.
None.
Just ask.
I'd be more than glad to put some money where my mouth is ( and it's a big mouth... ).
Thank you all very much for putting this up.
Hmm... being this is a NorCal design with two pots... does it have a bong too?
None.
Just ask.
I'd be more than glad to put some money where my mouth is ( and it's a big mouth... ).
Thank you all very much for putting this up.
Hmm... being this is a NorCal design with two pots... does it have a bong too?
To all of those busily designing your Zenductor variations, bring your "maybe this" and "why not's" to Mike's Saturday Spicy (LT that is) seminar and he might explore some of them with you.
-Tom-
-Tom-
The reason we put the speaker across the inductor is that it looked cool. 😎 Running the positive output to
circuit ground gives the same performance, but has one advantage which is that the output terminal doesn't
have live DC. I also dropped a capacitor, a pot, and a couple resistors.
No more suggestions, I am sending the art out for fab before it gets late.