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Title: Rangemaster - negative ground?
Post by: ESPm2M on June 10, 2004, 05:45:11 PM

I'm building a rangemaster soon from JD Sleep's layout and PCB, but I don't know whether to use the "regular" layout or the negative ground layout. Can someone please explain this to me? I plan on powering it via DC jack, but I am including the battery clip. The transistor came from Small Bear.

Thanks

Title: Rangemaster - negative ground?
Post by: EdJ on June 10, 2004, 06:10:43 PM

It depends on what transistor you are using.A PNP has positive to ground and a NPN has negative to ground.Watch your plus and minus on your caps too.
HTH,Ed

Title: Rangemaster - negative ground?
Post by: brett on June 11, 2004, 01:16:46 AM

Sorry to diagree EdJ, but NPN and PNP don't really have anything to do with grounding.

QuoteI plan on powering it via DC jack, but I am including the battery clip.

For that you'll want neg ground. There's a neg ground, PNP rangemaster over at Tonepad.com. That should help a lot.

cheers

Title: if you have
Post by: petemoore on June 11, 2004, 02:14:53 AM

suggestion...use a runof the mill [3906?] PNP till you actually get it going a little bit, so you don't reverse polarity the Germanium choice.

Title: Rangemaster - negative ground?
Post by: EdJ on June 11, 2004, 05:50:31 AM

Thanks Brett!
i always thought that it did.
Sorry for that.
Ed

Title: Rangemaster - negative ground?
Post by: EdJ on June 11, 2004, 06:06:33 AM

Or to put it clearer,i thought he was confused about which side of the battery he should attatch to ground.I always assumed that if you use aPNP transistor the power applied is a negative one so the plus of the battery goes to ground and if you use an NPN transistor the the minus of the battery goes to ground.Of course assuming is a stupid thing to do.
Again,sorry for that!
Greetings,Ed

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DIY Stompboxes => Building your own stompbox => Topic started by: ESPm2M on June 10, 2004, 05:45:11 PM