D*A*M - 1966 Italian Tone Bender

Original effect designs complete with verified schematics, layouts and instructions. All project were freely contributed by members and cannot be used for commercial purposes without consent of the respective owners of the copyright.
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beedotman
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Post by beedotman »

G5120fx wrote: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
To dark even in '66 mode? Try lower value then - 4n7 or 3n3.

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beedotman
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Post by beedotman »

Or You can use fixed 50K or 100K level pot without using switch with 47K on it.

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Post by monkeyxx »

these layouts are very different from the ones, and the schematic, that IvIark posted for the 1966. Are these verified? what schematic were they based on?

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beedotman
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Post by beedotman »

monkeyxx wrote:these layouts are very different from the ones, and the schematic, that IvIark posted for the 1966. Are these verified? what schematic were they based on?
it's traced from original unit that I used to have.
comparing to previous version - there are some changes in circuit - super bee mode is different (previously there was switch between 4n7 and 10n output cap), bias trimpot is on Q1 instead Q2, there's no 47pF cap on Q2 base and collector, and on Q1 was decreased to 220pF instead 470pF, Level pot values was changed from 50K to 500K.

claytushaywood
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Post by claytushaywood »

what are the transistors supposed to be biased at? similar to fuzz face? I'm not getting a whole lot of sustain either as noted by an earlier poster

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Post by claytushaywood »

also wondering how yall feel about the changes to the circuit- i guess I built the old one from the layout at tagboard

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beedotman
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Post by beedotman »

claytushaywood wrote:what are the transistors supposed to be biased at? similar to fuzz face? I'm not getting a whole lot of sustain either as noted by an earlier poster
around 6V on Q2C if I remember correctly

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Post by beedotman »

claytushaywood wrote:also wondering how yall feel about the changes to the circuit- i guess I built the old one from the layout at tagboard
what do You mean?

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Post by claytushaywood »

beedotman wrote:
claytushaywood wrote:also wondering how yall feel about the changes to the circuit- i guess I built the old one from the layout at tagboard
what do You mean?
how do you like the changes to the way the super bee switch works... among the other changes? I built the older version

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Post by beedotman »

I preffer old style output capacitor switching, but this is just matter of taste..

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Post by Sonofthebeach »

I want to build a DAM 1966 Copy but as I read this thread I got a little confused.
Which is the latest/most authentic layout I can find here?
Has anybody a good source in Europe for Germanium transistors like OC76 or AC125 perfect for a Vox Tonebender style pedal?

Thanks, Hendrik

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beedotman
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Post by beedotman »

Sonofthebeach wrote:I want to build a DAM 1966 Copy but as I read this thread I got a little confused.
Which is the latest/most authentic layout I can find here?
Has anybody a good source in Europe for Germanium transistors like OC76 or AC125 perfect for a Vox Tonebender style pedal?

Thanks, Hendrik
DAM 1966 were build at least using three different layouts, all are authentic. You can also use different layouts or pcbs to get same results.
Best source of germanium transistors nowdays is ebay, I think.
Langrex have great stuff:
http://stores.ebay.co.uk/LANGREX?_trksid=p2047675.l2563
Small Bear is selling matched sets (but it's located in US):
http://www.smallbearelec.com/servlet/Ca ... ransistors

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Post by lhc »

why the 47k resistor isn`t connected to the base of Q1?

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beedotman
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Post by beedotman »

lhc wrote:why the 47k resistor isn`t connected to the base of Q1?
:thumbsup

it should be. my mistake.

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Post by Guava »

Sorry to revive an old thread, but if I’m understanding the last comment, I should have the 47k resistor running from the emitter of Q2 to the base of Q1 instead of how it’s shown?

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