Re: My GAS Range (RangeMaster) pedal: Schematic

Just for the sake of remembering what's in this thing, I put together
a schematic:

http://amplifyer.home.comcast.net/GAS_Range/GASrangeSchem.jpg

If anyone wants to try building one, I'm sure there're better choices
of Germanium transistors, but the NTE158 is NTE's substitute for a
NKT275 which.... good luck finding one. Dunlop supposedly had new
NKT275s made to put in their version of the FuzzFace, but I can't tell
you if they're better or worse than the NTE substitute.

The RangeMaster input cap is around .005uf, but I used .015uf. The
closer you get to .005, this less low frequencies will get through,
and the less apparent gain you'll have. My pedal hits you with a lot
more treble than a full range boost pedal does, but it's a lot more
full range than a RangeMaster is.

Pete

On Wed, 03 Aug 2005 21:16:20 -0500, PMG <xxxxxxxXX@xxxxxxxxxxx> wrote:

>Ok, I'm finally done with this thing. Thank God. Pedals are a pain
>in the *** to build.
>
>But here it is, my GAS Range pedal, based on the Dallas Arbiter
>RangeMaster circuit. I used the schematic found on this website:
>
>http://www.boardsprep.com/mp3/treble_boosters.htm
>
>In place of the OC44 or NKT275 transistors suggested on the schematic,
>I used an NTE158 Germanium transistor because it was easy to get hold
>of. And in place of the .0068uf input cap, I used a .01uf, and a
>.005uf to come up with .015uf. I used the suggested .10uf output cap,
>and it's wired PTP between the pot, and the DPDT Carling stomp switch.
>
>The jacks are SwitchCraft, and those were wired into the enclosure
>using cloth covered solid core wire because I like using it, and I
>want those wires to stay put. The wires that need to flex are
>recycled stranded wire from a car stereo wiring harness. The cloth
>wire, Carling stomp switch, and the jacks are from Lord Valve, and
>most of the rest is from PartsExpress.
>
>Pictures:
>
>I like that polished aluminum look, but hate polishing it:
>http://amplifyer.home.comcast.net/GAS_Range/RangeMstr_front.jpg
>
>Inside view, all wired up:
>http://amplifyer.home.comcast.net/GAS_Range/GASrange_inside.jpg
>
>This is the underside of the perf board:
>http://amplifyer.home.comcast.net/GAS_Range/GASrangePerf_flipped.jpg
>
>I put that one polarized cap on the underside of the perfboard to keep
>down the clutter.
>
>Don't want to do this again anytime soon, but the pedal's a blast to
>play through and gives me a lot more gain than I need (I have to run
>it at less than 50%). It's like a boost pedal with an attitude. I
>like it a lot better than the MXR MicroAmp and the EH LPB-1.
>
>Nice pedal, but it's a combination of a good circuit design, and a lot
>of blind luck selecting parts.
>
>Pete


--
But if you are after mere parlor tricks,
you will be sorely disappointed. --Dr. Orpheus

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