Sola Sound - Tonebender Mark II Professional [schematic]
- Electric Warrior
- Diode Debunker
maybe misbiased.
- mcaviel
- Solder Soldier
Did the Phibes layout, i am getting really low volume, did all the cuts, which legs on the trimmer needs to be tied?Taller76 wrote:Now "verified" and sounding amazing...phibes wrote:Son of a bitch rendered to a different folder...
Let's try again.
THANKS!
Might want to add a note about the trimmer legs...or maybe add an optional cut for e14
BTW, now the trimmer doesn't effect anything.
Thanks
Aviel
- johnnyg
- Resistor Ronker
I've been a little confused about fitting the trimmer as well. I've not attempted Phibe's layout yet, but I got the impression from what's been said that you could connect the outer (3rd) and middle legs together... or you could bend the outer, unused leg up out the way below the trimmer but above the board.Did the Phibes layout, i am getting really low volume, did all the cuts, which legs on the trimmer needs to be tied?
Yet to break through the Space Charge
- phibes
- Transistor Tuner
Information
As sonicvi said, it's best to knock out one of the legs as you only need to use two. You could tie the third leg in accordingly in case the trimpot fails (it probably never will) but it's kinda just extra work for nothing when fucking around with vero. You have to set it up as a variable resistor. I would draw a diagram but there are a million trimmers so I figured it would kinda be second nature to know how to adjust the trimmer your using to the layout. Always check a datasheet. If legs 1 and 3 stay connected on the same track it will obviously be rendered useless. If I'm soldering one onto Vero I won't cut any of the legs off, I'll just make a trace cut on the whichever outter leg can take the cut and then trim it shorter. The other two legs soldered in will hold the trimmer with no problem. You could also just bend one of the legs under and then make any necessary trace cuts if needed. If your building this on PCB you can either delete a pad out before etching or adjust the artwork to have lugs 1 to 2 or 2 to 3 connected. The trimmers that Dave uses have the legs spaced apart a lot wider then your standard Bournes trimmer that has the legs in the middle. If your using something along the Bournes line you'll need to bend the legs outward before pushing them through the vero.
I guess post whatever trimmer your having problems with and I'll tell you how to set it in.
As far as the low volume goes, how low is it and what kind of transistor trio are you using?
I guess post whatever trimmer your having problems with and I'll tell you how to set it in.
As far as the low volume goes, how low is it and what kind of transistor trio are you using?
GuitarlCarl - "TGP = The Gear Polishers"
Ken
Ken
- johnnyg
- Resistor Ronker
That clears things up for me (new to using vero) - thanks for that sonicvi & phibes . I've got the same type of trimmer as used by DAM (bitsbox.co.uk sells em).
Lookin forward to building this circuit after chrimbo - have built a mkiii clone and curious how different the mkii is. Just waiting on transistors to arrive!
Lookin forward to building this circuit after chrimbo - have built a mkiii clone and curious how different the mkii is. Just waiting on transistors to arrive!
Yet to break through the Space Charge
- johnnyg
- Resistor Ronker
I was just wondering if anyone has built both the DAM version and Electric Warrior's layout? I was curious how the two compare - i.e. where it's best to place the bias pot? I'm naturally assuming the DAM layout with a 100k vr in place of the 47k resistor works best - DAM being the doyen of these old British fuzzes (from what I see on the net!). It's interesting though that you are then affecting the voltage at two transistors I gather? The base of Q3 and collector of Q2?
Yet to break through the Space Charge
- phibes
- Transistor Tuner
Information
Putting the trimmer on Q2's Collector works the best in my opinion.
GuitarlCarl - "TGP = The Gear Polishers"
Ken
Ken
- Electric Warrior
- Diode Debunker
Seconded.
- graemey
- Breadboard Brother
Built this yesterday from Phibes' layout. Wow! sounds better than my old Sola original! EVEN more gain and smoother decay (thanks to the trimmer).
Great layout, thanks!
I will post a youtube video when I get it boxed-up.
Great layout, thanks!
I will post a youtube video when I get it boxed-up.
- Scruffie
- Opamp Operator
Hey Graemey, Did you go for the Q2 or Q3 Trimmer pot? I'm just about to build another Tone Bender up On PCB hopefully and can't decide now.
Looking forward to your video though, keep 'em coming
Oh and for those interested I got another Trio of OC81Ds, they're all around the 90-100 hFe mark upon testing.
Looking forward to your video though, keep 'em coming
Oh and for those interested I got another Trio of OC81Ds, they're all around the 90-100 hFe mark upon testing.
- johnnyg
- Resistor Ronker
As it's Phibes' layout the trimmer will be on Q2.
If you don't mind me asking Scruffie, where'd you source the OC81ds? Can't find them - other than for stupid crazy prices on ebay... got some germaniums on order from Bulgaria in right gain area I hope will do the job.
If you don't mind me asking Scruffie, where'd you source the OC81ds? Can't find them - other than for stupid crazy prices on ebay... got some germaniums on order from Bulgaria in right gain area I hope will do the job.
Yet to break through the Space Charge
- Scruffie
- Opamp Operator
My OC81Ds came from having a grandad that hoarded stuff, they were in some random PCB, dunno what it used to be but I snipped them out of that, no secret supply sadly, I see some unbranded glass OC81Ds on ebay at a reasonable cost occasionaly though but I have no idea how good they are.
- johnnyg
- Resistor Ronker
Ok thanks man. Those 0c81ds are a very cool find!
I have to admit I kind of like the idea of using different germaniums to what is found in these old fuzzes and seeing what sounds you get... I'm pretty certain that when they were designed it was largely a case of what was easily available at a competitive price and I'm sticking to that ethos
I have to admit I kind of like the idea of using different germaniums to what is found in these old fuzzes and seeing what sounds you get... I'm pretty certain that when they were designed it was largely a case of what was easily available at a competitive price and I'm sticking to that ethos
Yet to break through the Space Charge
- Scruffie
- Opamp Operator
I know, it almost feels like a waste to even put them in a pedal!
Yeah i've got a bunch of weird and wonderful germaniums that I've never heard of or know how they sound in pedals that I wanna try out, it probably was a case of grabbing what was cheap and available, i'd give the newer russian ones a go, I wanna get and try some of those myself.
Yeah i've got a bunch of weird and wonderful germaniums that I've never heard of or know how they sound in pedals that I wanna try out, it probably was a case of grabbing what was cheap and available, i'd give the newer russian ones a go, I wanna get and try some of those myself.
- Electric Warrior
- Diode Debunker
Sweet. I'd love to see pictures of your Sola Sound pedal...graemey wrote:Built this yesterday from Phibes' layout. Wow! sounds better than my old Sola original! EVEN more gain and smoother decay (thanks to the trimmer).
Great layout, thanks!
I will post a youtube video when I get it boxed-up.
here's an updated version of the OC81D Tone Bender layout:
These seem to be the last version of the Sola Sound made Tone Benders. 50µF filter caps were used at that point.
- phibes
- Transistor Tuner
Information
Cool score on the trannies Scruffie. How are they branded? I've been stocking up on em a while and really need to get off my ass and box em up. Personally, I think I like the sound with OC75's better myself.
Definitely post some pictures Graemy! Your MKi video was mucho cool.
Definitely post some pictures Graemy! Your MKi video was mucho cool.
GuitarlCarl - "TGP = The Gear Polishers"
Ken
Ken
- Scruffie
- Opamp Operator
British Made Mullards 81Ds, I got one glass Mullard and one unbranded OC75 aswell as a metal can Mullard OC75 so i'll try them out aswell.phibes wrote:Cool score on the trannies Scruffie. How are they branded? I've been stocking up on em a while and really need to get off my ass and box em up. Personally, I think I like the sound with OC75's better myself.
Definitely post some pictures Graemy! Your MKi video was mucho cool.
- graemey
- Breadboard Brother
Hi Scruffie,Scruffie wrote:Hey Graemey, Did you go for the Q2 or Q3 Trimmer pot? I'm just about to build another Tone Bender up On PCB hopefully and can't decide now.
Looking forward to your video though, keep 'em coming
Oh and for those interested I got another Trio of OC81Ds, they're all around the 90-100 hFe mark upon testing.
It's on the base of Q3.
I knocked this one up using AC125's. The gains were around 120/130 and honestly, it just screams!
Is that a little high for Mk2 trannys?
As soon as it stops bloody snowing, I will get outside and spray an enclosure then post some pics and a video.
- Electric Warrior
- Diode Debunker
David reported even higher gains in vintage units: http://dam.10.forumer.com/viewtopic.php ... hlight=hfe