Tone stack circuit with frequency sweeps?

[beasleybodyshop]

Anyone ever seen one? I used to run sound in college, I used an Allen and Heath 3600 (I think that's what it's called) board. One thing I loved about it was it had frequency sweep adjustments so you could dial in or out specific midrange, treble frequencies etc. anyone ever seen a tone stack setup that uses them?

[Reeltarded]

They are out there but active tone stack in a driven amp has never made me happy. Looping in a parametric is something that makes me happy.

Hate to say. Rane PE15 please don't pay lots for one. PE17 works if no 15 around.

[Blindog]

The Fender Super Twin from the mid '70's had active EQ, then there's the LAB Series solid state amps that have a mid frequency control. I had a couple of LAB L5's over the years...fun amps to play around with and not expensive. Good enough for BB King...and Ty Tabor from King's X used 'em early on

Mark

[Structo]

You just need the Whizzer!

[img:698:275]http://i439.photobucket.com/albums/qq11 ... hizzer.jpg[/img]

[Reeltarded]

wtf

[beasleybodyshop]

Ah the Whizzer - made for Niel Young right? I read about this in a issue of Vintage Guitar. Not a bad idea for a one off, analog solution!

What benefits do i get from tossing a Para into the loop?

[Leo_Gnardo]

Ow yer wer spoilt! Yesss, very nice to have mid select switches or pots. Rare the guitar amp that has this feature. Can't remember model # but a late 70's solid state Yamaha had a full parametric mid. Easy to dial in the perfect "stuck wah."

Patching in a rackmount parametric would give you infinite tone choices. Furman made a good one late 70's (again, model #? PEQ3 maybe?), that Rane is a honey, and there's more besides. I keep a Moog MKPE up my sleeve for those moments when - quite a lot of synth like EQ is needed.

[roberto]

I'm on my ipad, so no specific software to simulate it, and it's just a "lying on the couch" idea.

All you need is:
- a Fender tonestack
- a dual 1 Meg Log pot
- a 22 nF cap
- a 470 pF cap
- Love

The two caps goes in parallel to the mid and treble caps, but each one with one side of the pot in series. This way you can change the notch of the mids on a standard fender tonestack.

Someone can try/simulate it?

[beasleybodyshop]

Leo, I am liking this idea of running para EQ into the loop. I have a dumble type thingy in the works, maybe going to try this out

Roberto - This sounds like a really simple solution. I have no idea if it would work, but I have most of that lying around in parts. could be worth a shot.

[Structo]

Yeah, Neil Young.

I love this Magnatone cab.

The Whizzer Deluxe is below it on the skate board!

See the red telephone on the left, he has a direct line to President Obama in case Obama has a question about socialized medicine.

[img:567:378]http://i98.photobucket.com/albums/l269/ ... ilgear.gif[/img]

[roberto]

Ok, done some sims, it's better a rotary switch with some different value of treble and mid caps, and the slope resistor too. Otherwise it's possible to use a pot for the slope too.

[Reeltarded]

That is a sensible idea right there. 3 poles and as many positions as you can get with a 50kl off the slope stack. Ya know plate voltage needs another pole and maybe a 5th for mixer bypass.

This is one dangerous switch.

[rhardman]

They are out there but active tone stack in a driven amp has never made me happy. Looping in a parametric is something that makes me happy.

Hate to say. Rane PE15 please don't pay lots for one. PE17 works if no 15 around.

yep.

[JazzGuitarGimp]

The Ampeg V4 / V22 has three position rocker switches for all three bands if I recall correctly. Had one in the shop for repair about a year ago. The Mid circuit uses a multi-tap inductor, and it sounds awesome.... Very musical EQ.

+1 on the full parametric EQ in the loop. Back in the 90's, i ran a stereo rack guitar rig. It had two Moog 3-band parametric EQ's. i wish I still had them...

[billyz]

Yeah, Neil Young.

I love this Magnatone cab.

The Whizzer Deluxe is below it on the skate board!

See the red telephone on the left, he has a direct line to President Obama in case Obama has a question about socialized medicine.

[img:567:378]http://i98.photobucket.com/albums/l269/ ... ilgear.gif[/img]

I love that Magnatone can! Looks like a super, a pro and a tweed deluxe too.