Mystery pedal help

[Gris]

I have this one knob boost type pedal someone gave me a while back. Apparently, it's an early version of the 'Singing Tree.' Cool graphics in a little box w/ TBP switching, so it ain't that old.

I know a little about amp innards, but nothing about pedal guts. I'm thinking this is a linear power boost type deal, but I'm not sure. If I post a pic of the insides tonight can someone classify/spec it?

I don't want to convert it to a Rangemaster clone if that's what it already is, LOL!

[Don]

Lets see it!

[Kap'n]

Could be a E-H "Screaming Tree" clone.

Aka the "Screaming Audience" pedal.

[Gris]

Well, incredibly the guy who made it - Eric Edvalson - just got in touch with me and said it's one of five first generation 'dirty boosts' he made.Waiting for more details. Can't post guts til tonight, but here is what box looks like...[IMG][/IMG]

[Gris]

All I've gotten out of him so far is "single transistor boost" ... :-)

[elicross]

SIngle TRansistor = SInging TRee?

Clever.

[Kap'n]

I believe all of the early EH boost pedals, LPB, Screaming Bird, Screaming Tree, Mole were based on the same one-transistor circuit.

A visit to GeoFX or Aaron Nelson's page could tell you a lot.

[Gris]

SIngle TRansistor = SInging TRee?

Clever.

Yyyyyeeessss, clever bird, problem solving intelligence...

Kap'n, I've never really given this thing a good workout, but... if afterwards it's less than spectacular, I HAVE been wanting to try a Rangemaster/Java-type clone for a while, so a conversion may be in order. Isn't the Rangemaster a Single-Transistor circuit...?

[Kap'n]

Isn't the Rangemaster a Single-Transistor circuit...?

I think so, but it's germanium, rather than silicon, which I believe the EH pedals are/were. Again, I'm working off of memory, rather than direct experience.

[Gris]

Eric says it's silicon transistor, either 2n5088 or 2n5089.

I've been told the Rangemaster/boost 'magic' revolves around a germanium transistor that is perfectly biased...

[Franklin]

Yup, he's right Gris. The Rangemaster majic involves a ge tranny with the right amount of gain (low) and leakage. I don't remember the values that Analogman used for the Beanos, but I love rangemaster clones! I use the Sunlion by AM which has a Beano Boost on the full range setting for a boost for my Fender DRRI. I LOVE IT!!!

It is a dirty boost, yeah, but that is fine with me. It adds some crunchiness for chords and kicks the DRRI into the sweet spot for solos too. With a Rangemaster the only thing is that you need to be able to run the amp pretty hot and it has to be a tube amp or else it could sound like ass. But it can also work for a loud/clean amp for a solo boost when you can't crank it up, but "that's not where the majic is", just like a fuzz pedal.

[Rickenjangle]

I think so, but it's germanium, rather than silicon, which I believe the EH pedals are/were. Again, I'm working off of memory, rather than direct experience.

Yep. I built the BYOC Tri-booster, which IIRC had 3 settings - germanium (rangemaster), silicon (lpb-1), and op-amp (true clean boost). The Rangemaster is the best-sounding and most useful of them all, IMO.

Although, I use one of the EH Nano LPB1's on my pedalboard. So, perhaps I like the germanium boost because it's different from that.