Build Your Own Clone Message Board

I just did the mix mod for the phase according to the byoc mix mod diagram, but the results are kinda weird...

at either extreme of the pot's range the signal gets "cut up and distorted". i tried two different pots, but they give the same result. once you turn past 9:00 or 3:00 the resulting signal is unusable.

any thoughts?

_________________
...

Try using 47k resistors instead of the 27k.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

the 47k resistors eliminated the "cut up and distorted" problem. sounds pretty great. the only small detail is that when the mix knob is set to 12:00 the volume is lower than when it is at either extreme.

_________________
...

The mixing part of the phase 90 consists of two 150k resistors. If you're using a 250k pot and two 47k resistors, the total resistance of the sweep is now higher. You will need to get a 200k pot (rare), or try a different combination.

A 150k pot + two resistors in series on either side: 47k + 27k might give a better result. A 100k pot + two 100k resistors might also work just fine.

K

perhaps a value between 27k and 47k may work better....33k?

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

just wondering...
what about isolating just the wet side of the signal with a 150k pot and leaving the 150K "dry" resistor in place?

_________________
...

That would only make it into a volume pot: Full resistance = unity gain and 50/50 mix, turn it and the wet signal goes louder, untill it distorts on output.

You want to keep the total resistance at or close to 300k to keep unity gain. This is why a 200k pot + two 50k resistors would be ideal.

K

A 150k or 200k pot may be more ideal, but they just don't make those anymore.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Don't know if these will work but worth a look for those who know...

http://tinyurl.com/m7snr

I think there's one on here that may work, you have to scroll a ways to find it...

http://www.kenselectronics.com/lists/pots.htm

Requires and RFQ to get a price... looks spendy...

http://www.etisystems.com/sw22e.asp

I like this one rated for 20,000,000 turns

http://www.etisystems.com/sp40b.asp

But resistors in parallel can get you there...

R1 x R2
_______ = TOT RESISTANCE
R1 + R2

So:

250k pot + 1M resistor lug 1 to lug 3 = 200k pot.
250k pot + 390k resistor lug1 to lug 3 = 150k pot



K

quick findings:

100k pot + (2) 100k resistors: didn't really do anything too audible.

250k pot + (2) 33k resistors: brings distortion back to the extreme settings.

250k pot + (2) 47k resistors: the most usable mod. main problem is the
volume drop at 12:00

I'm just going to keep trying different stuff.. I'll report my progress

_________________
...

this may be a little over the top but you might be able to use a switch to increase your input signal for when your on the lower mix settings

_________________
Pfft, what kind of loser takes the time to make a signature?

1M resistor lug 1 to 3?

K

Why not get a 24mm 200K pot? It is wider than a 16mm pot, but you can drill the whole larger. If the 200K pot and two 50K resistors are the best solution, then maybe going beyond the 16mm is worth a try.

I found a 200K 24mm at Mouser, but it's rated 1/2W... can I use it?

http://www.mouser.com/search/ProductDetail.aspx?R=RV24AF-22-15R1-B25virtualkey14860000

If not... oh well... there goes my idea.

I'm going to try this first... seems logical. Going to use the 250K pot I have, and I just happen to have a 1M resistor left over from another project. I'll be using pair of 47K and 3K resistors in series to get to the 50K... they don't have 50K at Radio Shack.

200k pots? I wasn't aware of that.

BTW, I don't think the 3k resistors in series will make much difference.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com