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April 19, 2014, 08:31:00 AM
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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  loud, jfet booster 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: loud, jfet booster  (Read 662 times)
kingswayguitar
Posts: 375


Rock on! Ben


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loud, jfet booster
« on: April 13, 2012, 07:55:22 AM »

my first post:
can anyone explain why this is so LOUD without any of the typical fuzzy/screaming/stuttering distortion?

http://www.aronnelson.com/gallery/main.php/v/Schematics-etc/j201j177.TIF.html

j201
D 6.65V
S 0.316V
Vp 0.6V

j177
S 5.82V
G 6.65V
D 0.295V

thanks
Bennito
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anchovie
Posts: 1645

James H, UK


Re: loud, jfet booster
« Reply #1 on: April 13, 2012, 08:19:26 AM »

It's supposed to be loud - it's a booster! You might want to put a volume control on the end.

It's not fuzzy because there aren't any clipping diodes, which would also limit the signal and make it less loud.
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- Guitar built from parts
- Random strings to make a full set
- Any pick that I can find on the floor
- Some pedals that I built
- My all-tube amp head that I built out of parts in my spares box
- Cheap Marshall 4x12 with better speakers fitted
R.G.
more
Posts: 15601


WWW
Re: loud, jfet booster
« Reply #2 on: April 13, 2012, 08:45:52 AM »

butbutbut is it - transparent?
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R.G.

It doesn't take a lot of technical chops to understand that such [cryogenic] treatment to a vacuum tube is probably similar to cryogenically treated stove elements.
DDD
Posts: 555

Dmitriy - Kazakhstan


Re: loud, jfet booster
« Reply #3 on: April 13, 2012, 08:48:44 AM »

Pls note also: there's only ONE gain stage since the second stage is unity gain follower.
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Too old to rock'n'roll, too young to die
Gurner
Posts: 1314


Re: loud, jfet booster
« Reply #4 on: April 13, 2012, 10:09:45 AM »

Pls note also: there's only ONE gain stage since the second stage is unity gain follower.

Whilst it looks like one, I don't think it is....it looks like a boost to me.
« Last Edit: April 13, 2012, 10:21:50 AM by Gurner » Logged
kingswayguitar
Posts: 375


Rock on! Ben


WWW
Re: loud, jfet booster
« Reply #5 on: April 13, 2012, 11:32:43 AM »

without the j177 it's not even close to that loud
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runmikeyrun
Posts: 2249


Mike T. Akron, OH


Re: loud, jfet booster
« Reply #6 on: April 13, 2012, 02:25:22 PM »

butbutbut is it - transparent?

runmikeyrun likes this.
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I'm so metal, I only use Gain laundry detergent.

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