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An inexpensive audio transformer with DIY projects

Too many cooks in one kitchen may spoil a recipe, but there are MANY kitchens in the world and many basic recipes that get tweaked at each kitchen and I've enjoyed many iterations of the "same dish", but each had its own flavour going for it (or sometimes against it, in which case I didn't enjoy the meal).

Just as there are many takes on the Rat, by ProCo itself no less, and a plethora of variations of the Muff circuit, I see no reason why this circuit can't be given different flavours by different tone chefs, with due credit given to the originators.
 
Too many cooks in one kitchen may spoil a recipe, but there are MANY kitchens in the world and many basic recipes that get tweaked at each kitchen and I've enjoyed many iterations of the "same dish", but each had its own flavour going for it (or sometimes against it, in which case I didn't enjoy the meal).

Just as there are many takes on the Rat, by ProCo itself no less, and a plethora of variations of the Muff circuit, I see no reason why this circuit can't be given different flavours by different tone chefs, with due credit given to the originators.

I hope that any modified versions of this boost pedal will be linked or posted in this thread, so everyone can see and compare all of the versions.

Also, any circuit that uses the TY-250 transformer is very welcomed in this thread. It appears to be a really nice transformer and there are many circuit possibilities beyond the boost project that was put together in this thread.

-Frank
 
i just finished building up 3 of the main PCBs along with the transformer and -9V inverter daughterboards and their etched enclosures so I'll be assembling these within the next couple of days.
I expect to be shipping yours out Frank by the end of the week.

3Transboostcircuits.jpg


3Transboosenclosures800.jpg
 
i just finished building up 3 of the main PCBs along with the transformer and -9V inverter daughterboards and their etched enclosures so I'll be assembling these within the next couple of days.
I expect to be shipping yours out Frank by the end of the week.

3Transboostcircuits.jpg


3Transboosenclosures800.jpg


Thanks John! They are looking very nice!

I am thinking that this pedal would probably stack really well after other dirt boxes.

-Frank
 
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Thanks again John for the Trans-Boost pedal!!!

I just was playing with it for about an hour with my Schecter C5 with active EMG’s and my passive Fender Strat. Both the bass and guitar were connected to the Trans-Boost then straight into the SWR 750x amplifier with a 4x10 cab w/tweeter.

I first tried it with the bass with lowest drive and least amount of clipping. It sounded very natural with a subtle little something in the tone that sounded just right. I ran it this way to get a feel for what the transformer was adding to the sound. Very subtle, but very nice!

Then I tried it with the drive at maximum with various clipping levels. This box can get real dirty with my C5! It may be a lot more dirt than I would use in a band setting, but the burpy attack was a blast! I could see myself using these settings for different passages of songs when the keyboard player is busy with his/her left hand on the lower register. With the drive at maximum and clipping at minimum, I could hear a slight loss of HF detail (the tweeter in my cab was on) which I attribute to the transformer beginning to saturate with the low frequencies. So, I don't know yet if I like transformer saturation or not, but I do like the B-H distortions that all transformers have.

I then adjusted the clipping to its max position and dialed up the drive until I had just a little break-up on the initial attack of each note. If I were still playing with a band, I could see myself using this as an always on pedal with these settings. These settings worked well for dynamic dirt… when digging in; there was just enough grit to emphasize the mood/feel. It reminded me of the times I had played thru my friends Mesa combo.

With my Strat, the pedal didn’t have enough drive to go into the heavier distortion territory with this soft clipping circuit. But it had enough to make chords sound thicker/fuller. A very nice tone enhancement for my Strat, but if a guitar player wanted one of these for dirt they may need to add more gain to the drive circuit by changing R6 to 3K3. I like it as is for a clean-ish blues tone and it would be perfect for driving another dirt box or tube amp. It had the same feeling to me as playing thru a clean tube amplifier. This would be a great way for someone to tube-i-fy their sterile SS rig. (My rig is Hi-Fi sterile, even though the preamp is a tube hybrid.)

With a minimum drive setting, the Strat had the same feel as my C5… natural sound with just a little bit of transformer color added to the tone. Very nice!!! This pedal would be great for re-amping tracks in a mix.

When I get more time I will try the Trans-Boost in the effects loop on the amp. This way I can try the bass again with heavier distortion settings on the box and blend some dry signal with it.

BTW, this pedal is even better looking in person! Great job John... THANX!!!!:thumbsup:

-Frank
 

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