OD channel tone control ?

[10thTx]

At times, I have wondered why there have not been more posts about some type of tone control for the OD channels on the D-clones?

Over this last yr or so, I have gotten a couple of questions regarding the "psuedo" 5E3 tone control that I use on my Tweed BluezMeister and D'Mars ODS amps (D-inspired amps) .

I am very happy with it and find it very useful to dial in the tone that I want on those amps. I feel like I benefit from a tone control both on the clean and OD channels.

I've seen the HRM tone controls that are typically internally trim pots. And I've seen something similar to a "cut" control on the OD.

Anyone else have an OD tone control that they are happy with where the pot is external vs an internal trimmer?

With respect, 10thtx

[hywelg]

Well I have just put the 12 way cut control the DrIka (Pickmaster) posted on the Ceriatone forum into mine. It works really well and allows me to have the clean channel as bright as I want it whilst keeping the OD tamed.

I moved the presence to the rear panel (as a temporary measure) under the OD trim control and installed the 12 way rotary in its place. I am finding that i do use the Cut differently with different amp settings or different guitars so it looks like it will have to stay. I was thinking I would find one value cap that would serve for all instances but thats not turning out to be the case.

[ChrisM]

What's the rotary switch doing?
Looks like a cap from the pot's input to ground, so shunting some highs to ground.

[hywelg]

What's the rotary switch doing?
Looks like a cap from the pot's input to ground, so shunting some highs to ground.

Indeed. Though I did wonder if it might be better to connect to the wiper? Maybe will try that at some point.

Various cap sizes up to 2.2n, and a NC. I only used 10 of the 12 available switch positions. Cap values, IIRC 38p, 56p, 82p, 120p, 220p, 390p, 500p, 680p, 1n, and 2.2n. If I had a better spread of values available I would have had more options in the 100-500p range as this seems to be where I am using it most.

[ChrisM]

If you connect the control from the wiper you'd have more resistance in series with the control (150K + the resistance from lug 3 to 2).

This would shift the cutoff frequency of the low pass filter lower.

[10thTx]

12 way cut control

IF you could determine which 3 values you use the most, then perhaps you could use a spdt center off and parallel the outside values to get the top three "cuts" that you use the most frequently.

Doing it that way .......... you could use a mini-toggle.

With respect, 10thtx

[hywelg]

IF you could determine which 3 values you use the most,

With respect, 10thtx

I'm using between 100pf and 390pf at the moment so I doubt I could narrow it down to 2 (flus off is always a good idea)

[10thTx]

I'm using between 100pf and 390pf at the moment so I doubt I could narrow it down to 2

So, if your amp settings on the cut control had been monitored ..........

Do you have a "best guess" as to which three of those between 100p & 390p you use most frequently?

My guitar has a 5 way switch. I use all 5 positions. Two of those 5 positions, I use more than the rest.

I'm trying to think thru that if space were truly an issue, which 3 would be the most useful on a center off spdt?

With respect, 10thtx

[hywelg]

I'm trying to think thru that if space were truly an issue, which 3 would be the most useful on a center off spdt?

With respect, 10thtx

Probably 100p and 220p, but its still early days yet. Still haven't tried my LP through it though my HSS strat has a Fralin Unbucker in the bridge.

[10thTx]

Probably 100p and 220p,

OK, then you could do 100p center off using a mini-toggle.

120p on one side for 220p.

270p on the other side for 370p.

That would cover the 100p -370p range.


Thank you for the response! With respect, 10thtx

[hywelg]

I did mean I would also want a true OFF, just for comparison. In that scenario I would put a Push Pull tone cut bypass on the Level pot.

And its also relevant that I have a 680p snubber on V2b which I will revert to stock and then re-evaluate.

[JazzGuitarGimp]

Hi 10thTx,

I would imagine the 100K trim pot at the front end is a linear taper, but what about the 100K OD Gain and OD Level pots? Are these log taper?

Many thanks,
Lou

[10thTx]

what about the 100K OD Gain and OD Level pots? Are these log taper?

I believe these are 100ka audio.

With respect, 10thtx

[JazzGuitarGimp]

what about the 100K OD Gain and OD Level pots? Are these log taper?

I believe these are 100ka audio.

With respect, 10thtx

Good to know - thanks!

[tictac]

10thTx wrote:
Quote:
what about the 100K OD Gain and OD Level pots? Are these log taper?


I believe these are 100ka audio.

With respect, 10thtx

Actually they are linear taper; I used to have audio taper for the Drive (Gain) control and I put a linear taper in there and it really does give you better control of the overdrive. See the Ford ODS schematic for reference...

A converted sceptic...

TT