HM-2 1.5uf cap

[chongmagic]

I used a 1uf with a reading of around 1.15uf. The pedal sounds like it should, would using a closer value cap create much of a difference?

 

[Robert]

I used a 1uF paralleled with a 0.47uF (both MLCC).

1.5uF:
Cutoff - ~87Hz (Q = 3.71)

1.15uF:
Cutoff - ~99Hz (Q = 4.23)

1uF:
Cutoff - 106Hz (Q = 4.54)


Tack a 470nF across it and see if you can hear any difference.

Alternatively, changing R25 to 470R and C16 to 1uF gives:
Cutoff - ~89Hz (Q = 3.8)

 

[Nostradoomus]

I feel 88hz in my chest...100 not as much haha.

 

[Devoureddeth]

I used a 1uF paralleled with a 0.47uF (both MLCC).

1.5uF:
Cutoff - ~87Hz (Q = 3.71)

1.15uF:
Cutoff - ~99Hz (Q = 4.23)

1uF:
Cutoff - 106Hz (Q = 4.54)


Tack a 470nF across it and see if you can hear any difference.

Alternatively, changing R25 to 470R and C16 to 1uF gives:
Cutoff - ~89Hz (Q = 3.8)

Were there any noticable differences in the boutique HM-2 that might be worth changing? I may have to start a thread when I get time to post some mods.

 

[chongmagic]

I used a 1uF paralleled with a 0.47uF (both MLCC).

1.5uF:
Cutoff - ~87Hz (Q = 3.71)

1.15uF:
Cutoff - ~99Hz (Q = 4.23)

1uF:
Cutoff - 106Hz (Q = 4.54)


Tack a 470nF across it and see if you can hear any difference.

Alternatively, changing R25 to 470R and C16 to 1uF gives:
Cutoff - ~89Hz (Q = 3.8)

I added a 47n film cap in parallel with the 1u. I just checked to make sure it still fired up and I have sound, I used a little battery amp in my garage to test it, so I will have to plug it in later and see how different it sounds.

 

[Robert]

I added a 47n film cap in parallel with the 1u.

You need 470n (not 47n) to bring it near 1.5uF.

 

[chongmagic]

You need 470n (not 47n) to bring it near 1.5uF.

Sorry I meant 470nf.