Author Topic: EHX Freeze tone control mod?  (Read 470 times)

Lameller

EHX Freeze tone control mod?
« on: March 06, 2018, 03:33:40 PM »
Hi

I would like to add a sinple tone control to the frozen signal of my Freeze. Any ideas on how to achieve that? I think i can get an almost wet signal from the effect volume pot on the pedl but i am not sure what kind of tone control i should add before returning the signal to the volume pot.

Hope this makes any sense??


vortex

Re: EHX Freeze tone control mod?
« Reply #1 on: March 07, 2018, 03:02:19 AM »
I like the Freeze pedal alot but the digital high frequencies on the wet signal are annoying. Is that what you want to tame?

One day I am going to poke around inside the Freeze and see if I can kill off a bit of sizzle with a small cap (to ground).

Lameller

Re: EHX Freeze tone control mod?
« Reply #2 on: March 08, 2018, 10:19:20 AM »
That's precisely what I want to do. Please let me know if you have any luck:-)

Best

Lameller

vortex

Re: EHX Freeze tone control mod?
« Reply #3 on: March 09, 2018, 02:18:36 AM »
Luck?
1) Find a ground point.
2) Locate the fx out lug on the 3PDT switch
3) Take a small cap and bridge them while listening to 'frozen playback'
4) Adjust cap to taste
5) Have fun

mth5044

Re: EHX Freeze tone control mod?
« Reply #4 on: March 09, 2018, 10:28:57 AM »
There’s a thread on this forum describing how to put an effects loop in the Freeze. Follow that thread and you’ll know where to tap into the circuit to get the wet signal. Place a tone control in there!

bartimaeus

Re: EHX Freeze tone control mod?
« Reply #5 on: March 10, 2018, 03:04:22 PM »
That thread suggested placing the fx loop between R3 (removed) and the wiper of the volume pot, but a lot of people had problems with bleed.

I just opened up my own Freeze and checked it out with a probe. It's a pretty complex circuit, and I'm not entirely sure of everything that's going on – I just tried to see what was connected to which lugs of the volume pot, and went from there.

It seems like R3 is connected directly to lug 3 of the pot (the lug that isn't connect to directly to the wiper on the PCB), not the wiper. So it might be possible to add the loop (or a tone knob) by removing R3 and connecting its "send" pad to lug 3 of the pot, and that might do the trick and avoid the bleed found in the other circuit. However, lug 3 seems to be connected to multiple things, which could account for the bleed people encountered, so I'm not sure if that will work.

I may be wrong, but it seems like the wiper of the pot is only connected to C36 (excluding its hard-wiring to lug 1 of itself), so it might be a better idea to place the effects loop between C36 and the wiper of the pot. One could try removing C36, and placing the send/return (or tone knob) across its pads. Before trying that, you could just remove C36 and see if the wet signal is completely muted or not. If it is muted, then it's probably passing across that pad, and you can try wiring up the effects loop (or tone knob).

I haven't actually tested any of this (yet...), but if you're feeling pretty adventurous, these ideas might be worth a shot...




Luck?
1) Find a ground point.
2) Locate the fx out lug on the 3PDT switch
3) Take a small cap and bridge them while listening to 'frozen playback'
4) Adjust cap to taste
5) Have fun

The freeze has an spdt switch, not a 3pdt, and no signal passed through it, so this won't work :/
« Last Edit: March 10, 2018, 03:06:09 PM by bartimaeus »

Lameller

Re: EHX Freeze tone control mod?
« Reply #6 on: March 20, 2018, 03:19:24 PM »
Great ideas!

I will try the last one out and get back if it works. I have rehoused my freeze in an old boss enclosue (i like the boss switches) so everything is easy to get to already.

By the way, the rehouse eorks really well as it is easier to use the freeze as a piano sustain pedal without having an extrrnal seitch takinh up real estate on my small board.