Author Topic: Need a Booster/Light OD? Look in HERE! (Read 8120 times)

markm · « **on:** April 13, 2007, 01:36:39 PM »

Here's a unique sounding booster/light overdrive that has really captured MY attention......
Peppermill-ish but better possibly!
Check it out!
http://aronnelson.com/gallery/album76/booster_LAYOUT

Ben N · « **Reply #1 on:** April 13, 2007, 02:50:13 PM »

Aw, you're not going to make us try to make sense of that without a schem, are you?

Ben

Mark Hammer · « **Reply #2 on:** April 13, 2007, 02:58:48 PM »

Gotta agree with Ben. I can look at a schem and have some gut sense of how its going to sound, but it took me 30 years to get that far. It's gonna take another 10 at least to be able to look at a parts layout and have that same intuition. Have pity on an old guy. I don't know if I have that much time left!

markm · « **Reply #3 on:** April 13, 2007, 03:40:47 PM »

Quote from: Ben N on April 13, 2007, 02:50:13 PM

Aw, you're not going to make us try to make sense of that without a schem, are you?

Ben

I have the schem at home but, you'll have to wait until I get there for me to post it!
It did come from one of the Japanese web-sites that I think Mark H posted about recently.

snoof · « **Reply #4 on:** April 13, 2007, 04:08:57 PM »

I second the wishes for a schem

johngreene · « **Reply #5 on:** April 13, 2007, 04:28:10 PM »

I believe this is correct: (playing with PCB123)

http://i26.photobucket.com/albums/c126/johng001/Booster.gif

--john

puretube · « **Reply #6 on:** April 13, 2007, 04:48:13 PM »

yer missin` C3`s value: 10n or: 0.01µF...

johngreene · « **Reply #7 on:** April 13, 2007, 04:48:54 PM »

Quote from: puretube on April 13, 2007, 04:48:13 PM

yer missin` C3`s value: 10n or: 0.01µF...

Look again.

puretube · « **Reply #8 on:** April 13, 2007, 04:51:37 PM »

why do you guys give numbers to "lugs" instead of calling them: "CW" or: "CCW", or: "wiper"?
do you look at their bax, or frontz?

puretube · « **Reply #9 on:** April 13, 2007, 04:52:45 PM »

Quote from: johngreene on April 13, 2007, 04:48:54 PM

Quote from: puretube on April 13, 2007, 04:48:13 PM
yer missin` C3`s value: 10n or: 0.01µF...

Look again.

hah!

markm · « **Reply #10 on:** April 13, 2007, 05:43:45 PM »

Quote from: johngreene on April 13, 2007, 04:28:10 PM

I believe this is correct: (playing with PCB123)

http://i26.photobucket.com/albums/c126/johng001/Booster.gif

--john

Nice Job!
This Schem John drew is correct......you guys still want the original?
The original uses a .1 for C3.
Don't know why I changed it but.....I did!
Sounds GREAT though!

dachshund · « **Reply #11 on:** April 13, 2007, 06:52:44 PM »

Quote from: puretube on April 13, 2007, 04:51:37 PM

why do you guys give numbers to "lugs" instead of calling them: "CW" or: "CCW", or: "wiper"?
do you look at their bax, or frontz?

As far as I know, it's 1, 2, 3 left to right in frontz, as with the shaft pointing atcha

markm · « **Reply #12 on:** April 13, 2007, 08:07:43 PM »

Quote from: dachshund on April 13, 2007, 06:52:44 PM

Quote from: puretube on April 13, 2007, 04:51:37 PM
why do you guys give numbers to "lugs" instead of calling them: "CW" or: "CCW", or: "wiper"?
do you look at their bax, or frontz?

As far as I know, it's 1, 2, 3 left to right in frontz, as with the shaft pointing atcha

Yes Sir.

markm · « **Reply #13 on:** April 16, 2007, 10:22:49 AM »

Here's a Bumpity Bump for Mr. Hammer!

Ben N · « **Reply #14 on:** April 16, 2007, 12:11:47 PM »

Thanks, John! 'Course, now that I complained about not being able to make sense without a schem, I can't make sense with one. Can someone explain what is going on between Q2 & Q3 in short sentences, using easy words my little brain can manage?

Is Q3 just a buffer? What is up with the biasing?

Ben

markm · « **Reply #15 on:** April 16, 2007, 04:41:20 PM »

Quote from: Ben N on April 16, 2007, 12:11:47 PM

Thanks, John! 'Course, now that I complained about not being able to make sense without a schem, I can't make sense with one. Can someone explain what is going on between Q2 & Q3 in short sentences, using easy words my little brain can manage? Is Q3 just a buffer? What is up with the biasing?

Ben

I'm not sure myself......
I'm thinking it's use is to clip the signal.
Maybe a Germ would be more "flavorful" in Q3.

markm · « **Reply #16 on:** April 17, 2007, 12:03:15 PM »

Quote from: Ben N on April 16, 2007, 12:11:47 PM

Is Q3 just a buffer? What is up with the biasing?

Anyone have an idea or want to chime in on this?

spudulike · « **Reply #17 on:** April 17, 2007, 01:04:03 PM »

Im probly wrong here, but looks like Q3 is running common-collector - the normal bias resistor between base and collector is actually the D-S of the jfet. So the jfet is dynamically setting the bias point of Q3 ?

spudulike · « **Reply #18 on:** April 18, 2007, 07:11:02 AM »

Bumpity ...

markm · « **Reply #19 on:** April 18, 2007, 01:24:28 PM »

Quote from: spudulike on April 18, 2007, 07:11:02 AM

Bumpity ...

Don't know that it was possible but, I think the Board is stumped! $:-\$

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Author Topic: Need a Booster/Light OD? Look in HERE! (Read 8120 times)