Mark V “Volume 1” and IIC++ mod

[Arossi52]

I’m not sure if anyone has done this as I haven’t seen it before, but after years of owning the Mark V I decided to add a “volume 1” to channel 3 of the Mark V in place of the solo volume (the solo function is still usable, but it is at a fixed boost amount now). It has the push pull bright function on as well as opposed to the Mark Vs factory fixed volume at 7-3/4 with hardwired bright cap. I’ve removed and changed values of a few other components in the circuit to make it more true to the original mark IIC+ (technically a IIC++ when switch to Mark IV mode). The only thing that isn’t exact is the negative feedback section which is a bit too complicated in the Mark V to make changes too. I’ve never heard of anybody attempting this (I’m a little insane for doing this, I know) but I’d love to hear any other mods anyone has attempted!

I have never played a real IIC++ but I can say for certain that the amp is a lot more satisfying to play now. More gain on tap in the Mark IV mode but the added volume 1 gives an even wider range of control.

 

[Markedman]

 

[Eevil]

Well… after having owned Mark III, Mark V and Studio preamp I’m very satisfied with the pre set volume 1 in Mark V one knob less to mess with…

But I understand the appeal to introduce all the missing functions from II to make the channel even more versatile. Usually I got option paralysis with III/studio preamp with bass shift/deep/mid shift/bright switches.

Yet good stuff figuring out these

 

[petruccirocks02]

Any chance we could hear some clips?

 

[woodbutcher65]

I had my concerns about losing a volume control in the Mark V as compared to a traditional Mark II/III setup, but actually using it, I've had no cause to pay any mind to those concerns. I've got about the same gain and tonal ranges that I do with my Mark III blue stripe and it actually can do a really good job of replicating my Mark IIB as well. Although, actually the Mark III does have a little bit more available gain. It actually will reach the point of ultimate note crush, where an undistorted note isn't even POSSIBLE with the guitar volume barely cracked.

 

[IronSean]

I was very seriously considering trying to source a concentric pot which could replace the gain knob with 2 concentric knobs (like on the EVH 5150 III 50w amps) to act as Volume 1 and Lead Drive. Unfortuantely my amp was still under warranty so I held off, then sold it. And now the used price has doubled so I'm not sure when I'll get the chance next.

 

[Arossi52]

Any chance we could hear some clips?

Yes I’ll try and record some clips this weekend

 

[Slash_83]

Can you give more technical info about the Mod? I'm interested.

EVen in pvt if you want

 

[notch269]

I added Volume 1 of CH3 as well as Arossi52.
I changed the SOLO on the panel to Volume 1 and ported C18 to the MUTE switch.
I used the one on the panel because both SOLO and MUTE are done with footswitches.

More gain on tap in the Mark IV mode but the added volume 1 gives an even wider range of control.

Exactly!