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D*A*M - 1966 Italian Tone Bender

Posted: 03 Nov 2011, 21:32
by beedotman
Yo!

Layout for latest revision of D*A*M 1966 (sadly discontinued)- vox tone bender replica.

Instead of switching output capacitors as in old version - in new, super bee switch changes resistance of output pot from 470K (super bee mode) to ~42K (1966 mode) - really fun mod! Another change due to old layout - now bias trimpot is on Q1 collector.

Instead mounting two output parallel capacitors (C3 - Iskra's 4700pF and C6 - Xicon 2200pF) - You can remove C6 and change C3 to higher value to (6800pf will be the closest value, but 8200pf/10nf/15nf sounds cool, too).

Enjoy! :thumbsup

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Re: D*A*M - 1966 Italian Tone Bender

Posted: 03 Nov 2011, 21:38
by beedotman
and here's pic of hidden cap under board

Re: D*A*M - 1966 Italian Tone Bender

Posted: 04 Nov 2011, 03:33
by RnFR
I know there are standoffs and all, but man, I would've definitely put some insulation on the leads of that cap on the bottom of the board.

Re: D*A*M - 1966 Italian Tone Bender

Posted: 04 Nov 2011, 07:47
by beedotman
RnFR wrote:I know there are standoffs and all, but man, I would've definitely put some insulation on the leads of that cap on the bottom of the board.
true! :thumbsup

Re: D*A*M - 1966 Italian Tone Bender

Posted: 07 Nov 2011, 08:22
by beedotman
And some more guts with different trannies combo - Texas Instruments OC82D + Mullard OC76 and Mullars OC71 + OC83.

Re: D*A*M - 1966 Italian Tone Bender

Posted: 18 Mar 2012, 18:27
by beedotman
Redrawn layout with full wiring under turretboard.org label :horsey:

Re: D*A*M - 1966 Italian Tone Bender

Posted: 18 Mar 2012, 18:42
by sinner
:mrgreen: My new project maker! Thank you in words :thumbsup

Re: D*A*M - 1966 Italian Tone Bender

Posted: 18 Mar 2012, 19:01
by beedotman
sinner wrote::mrgreen: My new project maker! Thank you in words :thumbsup
[smilie=drink.gif]

Re: D*A*M - 1966 Italian Tone Bender

Posted: 18 Mar 2012, 19:49
by Solidhex
RnFR wrote:I know there are standoffs and all, but man, I would've definitely put some insulation on the leads of that cap on the bottom of the board.
Those are half inch standoffs. If you're worried about those legs shorting to the enclosure its not really a possibility.

Re: D*A*M - 1966 Italian Tone Bender

Posted: 02 Apr 2012, 07:00
by G5120fx
I´ve build it yesterday, and its a nice sounding fuzz! I used Ac122´s (as always, I bought 100 pieces once).
It´s supposed to have not much sustain right? Italian Tone Bender --> Spaghetti Western --> little sustain right?

Re: D*A*M - 1966 Italian Tone Bender

Posted: 02 Apr 2012, 07:45
by beedotman
G5120fx wrote:I´ve build it yesterday, and its a nice sounding fuzz! I used Ac122´s (as always, I bought 100 pieces once).
It´s supposed to have not much sustain right? Italian Tone Bender --> Spaghetti Western --> little sustain right?
How short is sustain? It shouldn;t have sustain similar to let say Buzzaround or MKII, but it shouldn't be very short though...

Re: D*A*M - 1966 Italian Tone Bender

Posted: 02 Apr 2012, 07:49
by G5120fx
ok, there must be something wring then. The sustain is shorter compared to the MKII.
I´ll check it again... Which hfe´s did you use?

Re: D*A*M - 1966 Italian Tone Bender

Posted: 02 Apr 2012, 11:04
by beedotman
G5120fx wrote:ok, there must be something wring then. The sustain is shorter compared to the MKII.
I´ll check it again... Which hfe´s did you use?
It' dependts... usually Q1 around 60-75 and Q2 70-110.

Re: D*A*M - 1966 Italian Tone Bender

Posted: 21 Apr 2012, 13:47
by beedotman
small veroboard version with bias on Q2C and socketed trannies
should fit 1590B or 125B easily

Re: D*A*M - 1966 Italian Tone Bender

Posted: 23 Apr 2012, 19:49
by agoldoor
beedotman wrote:Redrawn layout with full wiring under turretboard.org label :horsey:
Pics of a build I did with this layout:
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photo (17).JPG
photo (17).JPG (95.99 KiB) Viewed 2253 times

Re: D*A*M - 1966 Italian Tone Bender

Posted: 25 Apr 2012, 06:11
by controller700
That is a great looking 1966!
From where did you get the rotary switch? I can´t find a rotary with only two positions...

What hfe values did you use for the trannies, and how close does it get to the "real thing"? 8)

Re: D*A*M - 1966 Italian Tone Bender

Posted: 25 Apr 2012, 07:00
by beedotman
controller700 wrote:That is a great looking 1966!
From where did you get the rotary switch? I can´t find a rotary with only two positions...

What hfe values did you use for the trannies, and how close does it get to the "real thing"? 8)
It dont need to be two position rotary switch, it could be with three or four positions - You can always limit amount of positions on rotary switches. Good idea is to use 3 pos. switch, two for mode changes and third for switch off battery.

Re: D*A*M - 1966 Italian Tone Bender

Posted: 25 Apr 2012, 11:45
by controller700
beedotman wrote:
controller700 wrote:That is a great looking 1966!
From where did you get the rotary switch? I can´t find a rotary with only two positions...

What hfe values did you use for the trannies, and how close does it get to the "real thing"? 8)
It dont need to be two position rotary switch, it could be with three or four positions - You can always limit amount of positions on rotary switches. Good idea is to use 3 pos. switch, two for mode changes and third for switch off battery.
Great idea! :thumbsup
I never used these before..

Re: D*A*M - 1966 Italian Tone Bender

Posted: 25 Apr 2012, 12:21
by beedotman
Here's for example 12 position 1 pole switch - top view.
In red are marked slots that You can use to limit number of positions from 2 up to 11, it's really quite easy to do :thumbsup

Re: D*A*M - 1966 Italian Tone Bender

Posted: 27 Apr 2012, 08:29
by G5120fx
I built the new vero yesterday, and i really like it. It´s a little too dark sounding with my Gretsch?! Should I experiment with the 6,8nf to get a bit more treble?

THX