Tuesday, 29 January 2013

Rangepig

Seems like i'm on fire with the requests today...

Here's Pete Moore's RangePig - an adaptation of Rangemaster with single low gain germanium transistor configured with modern silicon counterpart as darlington. Note that this is a positive ground effect, so you can't daisy chain this with other boxes that use negative ground. A simple pump is always your friend.


10 comments:

  1. You do realise February is just round the corner don't you? Ha ha

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    1. I'm just trying to make the january the craziest ever. Let's then see if anyone can beat that... :D
      +m

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    2. requesting a similar circuit....Briggs' Rangemaster MKII. :)

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  2. Thanks a lot, Miro, this evening I'll give this one a try! I've got a 50hFe ac128 that is waiting to be mounted in a strip like that!-D

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  3. One month later:-P... Yes, I tested it and sounds great, I checked with 2 transistors, one 50 and another one 122 hFe and it goes from trebly warm overdrive with 50, to much more dirty than I need in a booster, but it's a good thing to have the chance to test it...both them very warm. Just one thing if others build this, Level Pot is reversed, the 3 is 1. And I also put another pot instead of a trimmer if someone else want to try this too, the upper leg pin in the stripboard is the pot 3rd leg.
    Thanks a lot!

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    Replies
    1. Great, thanks for verifying Sergio. Miro will no doubt update the layout when he sees this.

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    2. Once again mispercieved the unmarked pot on the schematic :)

      Fix is coming up like now.
      Thanks!
      +m

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  4. This comment has been removed by the author.

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  5. I really like the idea of the Ge/Si Darlington. How easy would it be to make this NPN? I have lots of NPN Si trannies and some low Ute AC176s.

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