Guitar Splitter - Pete Cornish Style

[CJ]

threw this thing together,

Cornish buffer, true bypass,

amazing that it is hard to tell when it is on, does seem a bit more musical when engaged,

 

[CJ]

i want to drive two amps, or a parallel effects chain if using one amp,

might have to add some gnd lif switches,

wound a Neve style xfmr, 1: 1 + 1 to isolate the outs but it lacked bass so i ditched it,

 

[CJ]

sanded down an old aion fx board that i did not like and used the foot sw board as is,

seen those "greenies"?

that's where the funk lives.

i don't even want to hear about panasonic.

 

[CJ]

here goes the schematic, 1 n cap cancels out wolfman jack>

 

[CJ]

"Greenies" go for $8.95 for 100 at Small Bear Electronics.

look kind of like Clorets but harder to chew and they don't do nuthin for bad breath.

 

[musipol]

Did you do the case labeling with a silver sharpie? It reminds me of the ones that I do that way......................only your labeling is neater than mine.

 

[CJ]

i just scribbled that on there in about 5 seconds so i was not posting just a green box with parts,

acrylic pens>

https://www.posca.com/en/range/#
you throw a coat of lacquer over it for protection and shine and it looks cool,

 

[ps_electrik]

What voltage is needed to run this?

Also note that some amps can use a patch cord to drive both channels, if you have extra jacks...

Tx!

 

[Michael Tibes]

wound a Neve style xfmr, 1: 1 + 1 to isolate the outs but it lacked bass so i ditched it,

I've used line transformers (10k-ish) in similiar configurations and it worked fine. Did you use a Neve Output transformer?

Michael

 

[Gus]

CJ
Put the circuit in LT spice make sure to add a pickup tone and volume sim and reduce the C2 value in steps. You can get a bottom bump.

 

[totoxraymond]

I've used line transformers (10k-ish) in similiar configurations and it worked fine. Did you use a Neve Output transformer?

Michael

Did that too! 100% passive.

But i only used 1:1, for ground loop killing, the primary amp is driven directly.

Cheers,

Thomas

 

[CJ]

I tried the buffer out last night with two àmps, a vibro champ and Princeton reverb. The neat thing about the foot switch is you can get an immediate comparison between buffer and no buffer. With no buffer you get a drop in level and some muddiness. With the buffer it sounds the same in both amps as it does with one.

I used a mic in Neve,
only about 8 Henry's so maybe I need a bigger core to fix the bass drop. It was 499 turns of 36 awg pri and bi fi secondary of 499 t each. There are two coils, the winds were put in series.

Thanks Gus I will give that a try!

I did not get any ground loop hum with the buffer so maybe I do not need the transformer. I ran a freq plot on the buffer and it is flat til 83 k Hz where there is a pretty good bump. Maybe that is why there seems to be a tiny bit more presence with the buffer engaged.

 

[Riley Casey]

Did you do the case labeling with a silver sharpie? It reminds me of the ones that I do that way......................only your labeling is neater than mine.

These are fantastic for marking gear. At one time they made all the IEC colors but apparently they've cut back to this set, still ideal for marking black surfaces.

https://www.sharpie.com/markers/cha...sed-paint-markers-fine-point/SAP_37371PP.html

 

[CJ]

Thanks Riley!

just bagged a set, cheaper than the uniball acrylics,

 

[Michael Tibes]

I did not get any ground loop hum with the buffer so maybe I do not need the transformer.

The first device like that which I built might have been a 5534 buffer into a V74 input transformer (probably nearly 30 years ago). It did sound great as in 'pretty much inaudible', but he transformer became unreliable. Later I tried other manufacturers, but I didn't like the sound. Finally I realized that multing into 2 amps actually works well with a passive plug box, I never had a ground loop. Good guitar cables help of course. That's in my studio, on stage I'd be more concerned. As simple as possible

Michael