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DIY Stompboxes => Building your own stompbox => Topic started by: superferrite on May 04, 2011, 01:18:47 AM

Title: Rangemaster tranny gain question.
Post by: superferrite on May 04, 2011, 01:18:47 AM
Morning, all!

I found a couple of NPN Ge transistors in the parts bin that seem to have a hFE of between 40 and 60.  Is this too low for a rangemaster-type boost?    I want it as a first stage to kick my modded Colorsound One Knob fuzz into tonebender land.  

Works GREAT with my stand-alone PNP rangemaster, but I want to power them both from my power supply and save real estate by boxing them together.
Title: Re: Rangemaster tranny gain question.
Post by: joegagan on May 04, 2011, 07:04:51 AM
personally, i don't like RMs with under 70 hfe , but other people have reported liking low gain trans for these.
Title: Re: Rangemaster tranny gain question.
Post by: Joe Hart on May 04, 2011, 07:13:07 AM
I believe 70-100 is the accepted "magic" range.
-Joe Hart
Title: Re: Rangemaster tranny gain question.
Post by: superferrite on May 04, 2011, 09:49:54 AM
Thanks guys!
Title: Re: Rangemaster tranny gain question.
Post by: LucifersTrip on May 04, 2011, 10:46:34 PM
Once again, geofex has a great article. They recommend 75-100 hfe

http://www.geofex.com/Article_Folders/Rangemaster/atboost.pdf
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