Rangemaster PCB layout?

[Canucker]

any Dallas rangemaster layouts recommended for using an OC71 Transistor?

[rockhorst]

Well...any PNP one you like. Google it, just decide if you want positive or negative ground (both work well for RMs).

[Magnus]

Hello,
here's my layout (have built this layout twice, one with an OC71 and one with an OC44),
it is a negative-ground-version (able to daisy-chain) with power-filtering and three boost-modes are selectable,
so it is more versatile - the original circuit is active at the "classic"-position...

Everything is explained on the layout but if you have a question feel free to ask me  
http://forum.musikding.de/cpg/albums/userpics/17258/Dallas_Rangemaster.jpg

You can build it on perfboard or you can etch a pcb with this file:
http://forum.musikding.de/cpg/albums/userpics/17258/Dallas_Rangemaster-PCB.pdf

Have some fun!


Greetings
Magnus

[Canucker]

Thats great guys thanks! I've never built something that had the negative or positive ground option. I'm actually building this for my drummer who had a Skreddy (I think thats right) version of the rangemaster from 1971 I believe. He sold it last summer so hes keen on having me make him one!

[Arcane Analog]

With such a low parts why not just use vero, perf or point-to-point construction? It seems like such a huge amount of extra work and hassle to etch a PCB for one of the most basic circuits around.

[Arcane Analog]

I believe Madbean has a project file and from what I recall his stuff is always top notch.

[Canucker]

With such a low parts why not just use vero, perf or point-to-point construction? It seems like such a huge amount of extra work and hassle to etch a PCB for one of the most basic circuits around.

They don't actually sell vero around here so I would have to order it and wait so thats kind of more work....perf board just looks sloppy to me and I'd rather have the practice with the etching and press n peel transfer. Still perfecting some of my skills. Plus if I'm building something for someone else I know they will be showing it off and I'd like it to look as good as possible

[Arcane Analog]

Loads of vero on the internet and from sellers in Canada. 

Instead of having to prep and print the transfer, prep the copper surface, iron on the transfer, touch up the transfer, setup the etchant, etch the PCB, cleap up the etchant, clean the PCB transfer residue and finally drill the PCB, you can simply make the trace cuts and clean the traces. So much faster, much easier, ;ess work and all without the mess or chemicals required. That, and PNP is expensive - about the same as a small sheet of vero. You should try using photopaper. You can get 10 sheets of paper for less than the price of 1 sheet of PNP. Just refine your transfer technique.