TREBLE BOOSTERS

ivan H said:
Ok, here's a gutshot of the finished pedal
IMG_20200106_175000.jpg
Click to expand...
Regarding the wiring of your dc power jack: The circuit is of them Positive Voltage Ground systems because of the PNP transistor. Besides using a battery, how would you connect a power supply to it?
 
syscokid said:
Regarding the wiring of your dc power jack: The circuit is of them Positive Voltage Ground systems because of the PNP transistor. Besides using a battery, how would you connect a power supply to it?
Click to expand...
The DC socket & battery snap leads are wired just the same as a normal "negative ground" pedal, so a normal 9V supply can be used with it. From the DC socket, the +9V goes to the "ring" lug of the stereo input jack instead of the -9V that would go to this input jack lug on a normal "negative ground" pedal.
When it's a bit more light (it's early morning here) I'll see if I can get a close-up pic of the DC socket/input jack socket wiring, maybe also one of the same of my kit-built General Guitar Gadgets Tonebender mk11, which is also "positive ground" & has the DC socket/input jack socket wired the same way.
So when using a power supply, you either use a single channel of a "supply brick" with it, or a seperate "wall wart" for it, not "daisey chaining" it with other "negative ground" pedals.
Cheers
 
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ivan H said:
So when using a power supply, you either use a single channel of a "supply brick" with it, or a seperate "wall wart" for it, not "daisey chaining" it with other "negative ground" pedals.
Click to expand...
Excellent! Thanks, Ivan. I think I ran into that situation of daisy chaining a positive ground pedal with a couple regular negative ground pedals before. It wasn't a happy result. I ended up operating the positive ground pedal on its battery. I think it was my Fulltone Soul-Bender.

Anyways, I got all the parts to build a couple treble boosters, including a couple undrilled enclosures. I leaning very much towards not installing a DC jack in these pedals. And yeah, I've been looking hard at the excellent info from General Guitar Gadgets.

Here's an illustration from GGG that I altered by removing the DC jack and redirected some of the wiring. Does this look good?
ggg_sw_3pdt_tb_pnp_dcj_gi.jpg
 
syscokid said:
Excellent! Thanks, Ivan. I think I ran into that situation of daisy chaining a positive ground pedal with a couple regular negative ground pedals before. It wasn't a happy result. I ended up operating the positive ground pedal on its battery. I think it was my Fulltone Soul-Bender.

Anyways, I got all the parts to build a couple treble boosters, including a couple undrilled enclosures. I leaning very much towards not installing a DC jack in these pedals. And yeah, I've been looking hard at the excellent info from General Guitar Gadgets.

Here's an illustration from GGG that I altered by removing the DC jack and redirected some of the wiring. Does this look good?
View attachment 38169
Click to expand...
Yes, that looks good.
As treble boosters use only a single transistor, the current draw is very small so a battery lasts quite well. Cheers
 
syscokid said:
I think I ran into that situation of daisy chaining a positive ground pedal with a couple regular negative ground pedals before. It wasn't a happy result. I ended up operating the positive ground pedal on its battery.
Click to expand...
Using a "daisey chained" DC supply set-up & both negative ground & positive ground can't be done due to the shielded patch cables that link the pedals together. As each pedals input & output jack sockets are grounded to that effect, if we try to use a daisey chained supply, & combine a positive & negative grounded pedal, the shielded patch cables short the supply through the jack sockets of different polarity.
It is possible to break the patch cable's ground at the jacks to the positive ground effect (both input & output) & still daisey chain the supply, but this is really a drama &, IMO, just not worth it. Best to use a battery, dedicated wall wort or power brick supply channel for positive ground effects.
If you have more two or more positive ground effects in your signal chain, they "can" be daisey chain supplied. Cheers
 
Besides slapping a finish and some graphics, this treble booster is done and it's killer! I'm naming it the "Another Awesome Treble Booster"... :rolleyes2:
Another Awesome Treble Booster (1).JPG

No DC power jack. Batteries only!
Another Awesome Treble Booster (2).JPG

I like these new footswitches with built-in LEDs...
Another Awesome Treble Booster (3).JPG

Another Awesome Treble Booster (4).JPG

It sounds and performs very similar to my Rangemaster. I measured 6.9 vdc at the transistor's collector lead. And now I have three treble boosters, and soon I'll put together a fourth one!
 
ivan H said:
Nice, very well done. What "alternate" value input cap does the toggle switch in? Cheers
Click to expand...
Switch: .005 cap for original TB response and .01 cap for more mids joining the party. Both of these caps are the ones you fed me.. plus the perfboard, the two stand-offs, and a ton of education... :cheers:
 
syscokid said:
Besides slapping a finish and some graphics, this treble booster is done and it's killer! I'm naming it the "Another Awesome Treble Booster"... :rolleyes2:
View attachment 38353

No DC power jack. Batteries only!
View attachment 38354

I like these new footswitches with built-in LEDs...
View attachment 38355

View attachment 38356

It sounds and performs very similar to my Rangemaster. I measured 6.9 vdc at the transistor's collector lead. And now I have three treble boosters, and soon I'll put together a fourth one!
Click to expand...


That looks like an emergency stop switch on a cnc machine. The red button makes it look like you only hit it when you need to.
 
Just finished my second treble booster build. And it's going to be shipped to JohnnyGoo. This second one is different in two ways: This one has a DC jack and the circuit is built off a 5-lug terminal strip instead of a perfboard that's on the my first TB build. This one turned out very nice, too. The OC44/CV 7003 germanium PNP transistor has a measured HFE of 97 with a .017 leakage value... whatever that means! Voltage at the collector is an excellent 7.0 vdc.

Gratuitous pics:
Still learning on how to super-polish these aluminum enclosures...
AATB for JohnnyGoo (3).JPG

AATB for JohnnyGoo (4).JPG

This is really pointy to pointy...
AATB for JohnnyGoo (1).JPG

AATB for JohnnyGoo (2).JPG
 
Damn Sysco, that looks great. Good to see you passing the love around the TTR brotherhood too, I imagine JohnnyGoo will be stoked. Very well done (& great inspiration for my next one). Cheers
 
ivan H said:
Damn Sysco, that looks great. Good to see you passing the love around the TTR brotherhood too, I imagine JohnnyGoo will be stoked. Very well done (& great inspiration for my next one). Cheers
Click to expand...
All the resistors are metal film and really help in keeping the hiss-type noise way down. Plus, the switchable input caps would be much easier to swap out in my terminal strip method than the perfboard method that I attempted. And... If I were to build another one, I would use a 6-lug terminal strip with a common lug on each end in order to use a second stand-off for a bit more support of the terminal strip.

Like this:
p-0602h.jpg
 
funny -- I run my guitar amp heads through a bass 12" speaker/ cabinet to reduce treble.............dont like treble ---- its annoying :)

the little ORANGE MT into the 12 inch bass speaker --- sounds very close for low $ to the tone in the video
 
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