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planck2
PostPosted: Wed Jul 25, 2007 11:07 am 
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Hello,
I am new, and thinking of building an 18watter.
After looking at the sIII build Sticky post
I noticed on the turret board, close to V1, right by the R9 there is a 2k7 and a 22uF in parallel but not going any where.
Is it like an option in case some one want more gain connect it there instead of the other 2700 Ohm Resistor?

Thanks


Last edited by planck2 on Wed Jul 25, 2007 2:19 pm, edited 1 time in total.

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PostPosted: Wed Jul 25, 2007 1:57 pm 
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That's the boost mod placement(which I suggest using).You run it to a switch to bring it in and out of the circuit.Welcome, BTW!
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planck2
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PostPosted: Wed Jul 25, 2007 2:20 pm 
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uh, like using a SPDT switch?
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PostPosted: Wed Jul 25, 2007 3:14 pm 
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Yep, that's the ticket!
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planck2
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PostPosted: Tue Jul 31, 2007 11:46 am 
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it seems the resistor value will be dropped to about 1350 Ohm, is that intended as well?
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coco
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PostPosted: Tue Jul 31, 2007 7:27 pm 
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Yes, add the 22uF cap, mix and enjoy!

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planck2
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PostPosted: Wed Aug 15, 2007 10:12 am 
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I saw in this forum, that this value be 1uF or so. Has the value changed from 22uf to 1 uF? The schematic shows 22uF though.
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coco
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PostPosted: Wed Aug 15, 2007 10:24 am 
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You can use 1 uF. 22uF is what is typical for this and works well.

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planck2
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PostPosted: Mon Sep 17, 2007 12:00 pm 
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if you flip the switch while the amp is on, does it make a loud thump sound?

or do you go to standby and then flip the switch to avoid the sound?

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coco
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PostPosted: Mon Sep 17, 2007 6:19 pm 
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planck2 wrote:
if you flip the switch while the amp is on, does it make a loud thump sound?

or do you go to standby and then flip the switch to avoid the sound?


Yes, it does make a noise. To eliminate that on production models, we designed a soft boost electronic switch but it's not straighforward to build so that is why we only offer a toggle switch on kits.

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Revv23
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PostPosted: Thu Sep 20, 2007 8:09 pm 
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the toggle switch is very quiet for me... i mean there is a noise but a very small one...

the switch opens up a whole new selection of tones too... i'd recommend it; especially since it's so easy.
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coco
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PostPosted: Fri Sep 21, 2007 7:03 am 
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Could be the switch. Some have better contacts than others.

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Revv23
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PostPosted: Sun Sep 23, 2007 10:44 am 
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Ok i take it back... the pop is pretty loud when you flip the switch....


don't know what i was smoking when i wrote that the other day.
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