Anybody built a Tech21 Double Drive??

[Carlos]

Hi!

The Tech21 Double Drive is a fascinating pedal, great sound. Has anybody built from the schematics:

http://www.axiomdrift.com/schematics/DD%20PN.gif

Regards

Carlos

[Thomas P.]

Damn - I just posted a question on how it sounds :?

As you might read I already made a PCB and I'm willing to use it :wink:

[Kleber AG]

Then...................................................................... :lol:

How does it sound??? :shock:

I'm interested too.

Kleber AG

[Carlos]

Here is a sound clip from the British magazine Guitarist. They don't say, how they recorded it, though.

ftp://ftp.futurenet.co.uk/pub/guitarist/git227/tech21.mp3

Regards

Carlos

[Vasiliok]

I've built it using TL072.
Sounds horrible!

You need original ICs: TLC2262C or TLC2264C to get original sound of device!

[Carlos]

Hi Vasiliok!

Good advice to use the original chips (I would have done that anyway).
Which schematics did you use? The link I posted?

Carlos

[Vasiliok]

Hallaw Carlos!

Yes!
The link you posted!!!

You know, the secret of Tech21 effects - their ICs!

Cool sound because of those ICs. Others will sound horrible!

[Ansil]

I've built it using TL072.
Sounds horrible!

You need original ICs: TLC2262C or TLC2264C to get original sound of device!

i oliminated two opamps and did it on a ratshack board with a lm324  sounded evil..

[Nick123]

..and  it  sounds  quite  good.
I  still  haven't  tried  it  at  loud  level  though.
At  bedroom  level  it  sounded  grainy  at  first,  but
after  some  tweaking  I  managed  to  get  some
really  good  fat  low-gain  sounds  and  good
crunchy  rhythm  sounds  as  well.
Sustain  is  excellent.
It  seems  that  100klin  is  better  than  100klog  for
TONE  control  because  DD  sounds  a  bit  dark  with
100klog  for  most  of  a  pot  rotation.  
100klog  for  both  DRIVE  controls  are  a  bit
too  clean,  but  could  be  good  for  low  gain  sounds  at
loud  level.
With  both  DRIVE  control  dimed  TL072  as  IC2 sounds
horrible,  but  TLC2262  improves  sound  a  lot.
I  have  found  that  DD  sound  best  with
DRIVE A  from 5 to 9 , DRIVE AB  from 3 to 6 , TONE
from 4  to 8  and  LEVEL  from 4 to 7.
All  pots  are  still  100klog  but  I  will  try  100klin  
in  TONE  and  DRIVE  positions.
I  will  install  switch  for  some  other  diode
arrangements ( 1 LED or  4 Ge  diodes  for  example ).

[dubs]

So has anyone made a pcb of it yet they're happy to share?

[Gringo]

I'm on it.

[Thomas P.]

I did a PCB and I will send it on request.

[Gringo]

I'm requesting

gringo@worldconquer.cjb.net

Thx!!!!

[Thomas P.]

I'm requesting

gringo@worldconquer.cjb.net

Thx!!!!

Check you mail

[Joep]

Hi Tomboy,

I'm interesed too, my e-mail is ns_joep.remkes@planet.nl

Did you build it yourself? Do you like it?

Please remove the "ns_" part

Schone Grussen,

Joep

[dubs]

Hi Tomboy,
I PM you re: PCB.
Where can you buy the ICs that can be shipped overseas i.e Australia?

[Thomas P.]

Hi Tomboy,
I PM you re: PCB.
Where can you buy the ICs that can be shipped overseas i.e Australia?

Talking of the TLC2262 it can be quite a hard one. I myself got it from www.conrad.de. But I don't think it's worth shipping one IC from germany to australia.

[Paul Perry (Frostwave)]

I could be completely out of order here, but might a LM358 do? It has been suggested as a substitute in some instrumentation equipment.

[Paul Perry (Frostwave)]

Mouser & Digikey both have TLC2262 & ship to Australia, if that helps.
Cheapest would be Mouser, ask them to use US post (nothing worse than getting charged FEDEX international for a chip!)

[kugua]

nick123 could you record a sound clip for us?I had made one but the sound very like fuzz.i used one TLC2262C .and the noise very hard.when i make two drives are full.