I'm thinking about using the 4 gang ALPS pot for my dynahi.  I want to mount it on a pcb but I don't see any available so I thought if I took two epsilon 27 boards I could make one.  The first board would fit the front, the second board looks like it would need the front trimmed off to fit the back section.

 

The grounds are tied together on those boards so I'm not sure how that comes into play since I've never wired a pot for balanced audio before.  How do you wire a volume pot for balanced audio and do you think this would work?

It might be easier to just use perf-board if the pin spacing matches up. Otherwise I'd just neatly air wire it and not worry about pcbs.

i can whip up a board if you want to have some made.

birgir has boards for the alpha pots

When building balanced amps I use a 2-deck pot with shunt resistors. 

does not work with some sources.

ends up with a dc offset, or causes issues

like eddie current has with the electra

It might be easier to just use perf-board if the pin spacing matches up. Otherwise I'd just neatly air wire it and not worry about pcbs.

that's what I was going to do at first.  I'll get the pot first and see if I have anything that fits

i can whip up a board if you want to have some made.

birgir has boards for the alpha pots

Thanks Kevin, that would be cool.  screw terminals on the output would be nice.  I'd do a small board run for that.

is each section 10mm from the next, and hole size

or a pdf of the quad pot

does not work with some sources.

ends up with a dc offset, or causes issues

like eddie current has with the electra

What causes this?  Any examples circuits which have this issue?

is each section 10mm from the next, and hole size

or a pdf of the quad pot

yes, hole size is 1.2mm based on the diagram here

 

http://www.ebay.com/itm/260964413265?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

like this

http://gilmore.chem.northwestern.edu/rk27quad.jpg

The quad ALPS layout we used on the Megatron works perfectly as a reference. 

On further reflection I wouldn't recommend using an RK27 for a balanced dynahi. Find something better.

like this

http://gilmore.chem.northwestern.edu/rk27quad.jpg

Yeah, that looks perfect.  When hooked up where do I connect the ground?

On further reflection I wouldn't recommend using an RK27 for a balanced dynahi. Find something better.

Yeah I know...  I really want a gold point in there but I just want to get sound out of it at this point.  Plus I just blew my wad on a set of SR200's

Edited November 18, 201312 yr by sbelyo

Yeah, that looks perfect.  When hooked up where do I connect the ground?

 All of the ground connections are shared so anywhere with GND next to it. 

 All of the ground connections are shared so anywhere with GND next to it. 

Do I connect it to chassis ground?  or ground on the amp board?

Amp board

http://gilmore.chem.northwestern.edu/rk27quad.zip

You are the man!!!  anybody know of a good board house I can have a small run done at?

I'm pretty sure I used a pair of these (though red) on the quad Alps I have, will check tonight. FT cheaper than having a board run done.

 

http://www.ebay.com/itm/like/251069334948?lpid=82

That was going to be my other choice.  I was going to use two of AMB's boards

If you can do with 3, I'd think OSH Park would work really well--probably $15-$20 for the size.

http://gilmore.chem.northwestern.edu/rk27quad.zip

oh no, a board outline file can't be found.  help

Edited November 19, 201312 yr by sbelyo

not sure what software you are using, but this board file is the

same as every other one I have done. may not be compatible

with some panelizing software, but have produced thousands

of boards with the software I use.