Rangemaster clone

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Rangemaster clone

Postby David B » Sat Feb 07, 2009 4:30 pm

found a OC77 that works well,isn't as noisy as some OC44& OC 71's I tried. Only thing I might do is add a switch to have full range boost..

http://i270.photobucket.com/albums/jj10 ... 7Boost.jpg
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Re: Rangemaster clone

Postby dai h. » Sat Feb 07, 2009 5:27 pm

hey how do you like it? I built one before but it seemed a bit boring (but might not have used it in the best way or biased it the best way or something).
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Re: Rangemaster clone

Postby David B » Sat Feb 07, 2009 7:24 pm

I place in front of distortion to give a little boost for lead work , like how it tightens up the bass.Measured & biased per Keens recommendations and I picked through for a relatively noiseless transistor as it does hissssss..
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Re: Rangemaster clone

Postby dai h. » Sat Feb 07, 2009 8:22 pm

hmm... so maybe use it hotten up the input. FWIW (warning: parts fetishist info ahead :oops: ) some of the originals seem to have had a "dog bone" type ceramic for the output 5n(?) cap. I remember seeing pictures of an original on some German site with one of those red Lemco dogbone caps. Perhaps that will help give extra brightness and colour over a film.
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Re: Rangemaster clone

Postby dai h. » Sat Feb 07, 2009 8:25 pm

oh and also, did you etch that board yourself or is it something purchased from a commercial outfit? It looks nice.
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Re: Rangemaster clone

Postby David B » Sat Feb 07, 2009 9:12 pm

Mine used film caps and is plenty brite but next one I wanna do the old fashioned way on a terminal strip with old parts..this one looks cool..

http://artifactaudio.com/includes/guts50.JPG


Nah I haven't etched a board since HS :oops: Got this one from Retroman some time ago, Joe does great work
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Re: Rangemaster clone

Postby dai h. » Sat Feb 07, 2009 10:21 pm

is retroman this guy?

http://www.retroman-music.com/

I think I got confused on the caps. 5nF input, 10nF output (and some had a bit smaller value?)?
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Re: Rangemaster clone

Postby David B » Sun Feb 08, 2009 1:39 pm

Yup that's the guy, before he started selling pedals Joe sold a few boards.AFAIK the common input caps for a stock Rangemaster is 5nF
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Re: Rangemaster clone

Postby dai h. » Sun Feb 08, 2009 5:27 pm

cool, thx. Here's the page I was referring to above:

http://www.treblebooster.net/workshop.html
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Re: Rangemaster clone

Postby David B » Sun Feb 08, 2009 7:49 pm

Hey Dai,
Cool site ,those BSM are suppose to sound pretty good I hear.
No joke on the about 50% reject rate to fine a good one! darned things are either too noisy or leaky :x
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Re: Rangemaster clone

Postby dai h. » Sun Feb 08, 2009 8:20 pm

definitely seems hard to find low leakage combined with good gain. I checked a couple of hundred that I had accumulated over some time for Fuzz Face duty and ones that met the spec for the higher gain one were pretty scarce. Luckily I found some 2SB172 a bit later which weren't real expensive so I could buy them in numbers and I was able to get a pretty good yield from those. There still seem to be stashes some places if you look world wide. A guy in NZ on aron's forum apparently found a huge batch of 2SB172 (hundreds IIRC) and got them quite cheap from what I understand. He was selling selected ones there for a while.
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Re: Rangemaster clone

Postby Roe » Mon Feb 09, 2009 6:15 am

the byoc tribooster is my favorite pedal.- the treble user is the effect I use the most even if it is noisy. the hardest part is finding and selecting transistors. here's a clip http://snotpope.com/downloads/20_Bones/Track%2002.mp3
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Re: Rangemaster clone

Postby David B » Mon Feb 09, 2009 11:12 pm

Roe wrote:the byoc tribooster is my favorite pedal.- the treble user is the effect I use the most even if it is noisy. the hardest part is finding and selecting transistors. here's a clip http://snotpope.com/downloads/20_Bones/Track%2002.mp3



Not a bad deal prepunched & all the bits, you use the tranny provided or got your own?

Generally I like to do my own box hacking as its therapeutic :lol:
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Re: Rangemaster clone

Postby Roe » Tue Feb 10, 2009 9:35 am

thats the byoc transistor. noisy but good-sounding
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Re: Rangemaster clone

Postby David B » Thu Mar 05, 2009 11:00 pm

Did the ol AB listening test as my pedal is socketed , came to the conclusion that I like the OC71 the best despite it being a noisy bastid :twisted: Both transistors are biased about the same with Hfe around 90 IIRC so that probably isn't a factor. Great sounding little pedal
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