john mayer's two rock??

[swt]

Hi. Can any body guess or tell me what type of circuit, compared to the ones we build here, is the two rock from john mayer?. 100k/1k5...skyliners...etc?. Thanks a lot!!

[Funkalicousgroove]

My guess is 100/1k5 with their version of the Fender reverb circuit.

May possibly have a CF driving the Outputs.

[JimiB]

is it two channel?
reverb on both?

[swt]

it's definitely dumble sounding...the cleans are great!! Smooth od...will aslo like to know about speakers...

[novosibir]

Two Rock's throughout do have 100K plate and 1.5K/4.7µ cathode on V1 & V2

I have a hand drawn Two Rock schem, which I've made myself a couple years ago. Just let me know, if you'd like to get a copy as a pdf-file and drop me your email!

Larry

[B Vance]

[quote="swt"]it's definitely dumble sounding...the cleans are great!! Smooth od...will aslo like to know about speakers...[/quote]

I have not had the chance to play the JM Sig, but I was under the impression that it was simply a clean 100 watt amp. Everything I've seen has mentioned the fact that he uses other means to generate his OD.

He was using a string of different pedals for a while but when I saw him at the Crossroads Guitar Festival he was using a Dumble overdrive solid state preamp of some sort.

About a year ago, Tomo was trying to get John on with Eminence Speakers, but JM was insistent on his Jensens. As far as I know he's still using them unless Two Rock came up with a JM signature speaker.

[v00d00blues79]

What model Jensen's?

Thanks,

Andy

[novosibir]

Just now I've seen, how to attach files. Now see the TwoRock schem below!

Since it's hand drawn with a pencil, unfortunately some lines only are barely visible. As soon as I'll find some more time in the future, I'll go and draw it again with ExpressSch and place it into the Dumble Files forum - but that might take still some time.

If there's anything in doubt, simply drop me an email or PM!

Larry

[B Vance]

[quote="v00d00blues79"]What model Jensen's?

Thanks,

Andy[/quote]

The 50 watt 12" Alnicos...P12Ns seem to come to mind. I'm not 100% sure though. He did say that the Jensens he liked had paper thin cones.

[ayan]

Two Rock's throughout do have 100K plate and 1.5K/4.7µ cathode on V1 & V2

I have a hand drawn Two Rock schem, which I've made myself a couple years ago. Just let me know, if you'd like to get a copy as a pdf-file and drop me your email!

Larry

Hardly as per my experience. I have seen a Cust Sig Rev which was 220/150 3.3/2.2 on both V1 and V2, and an Em Pro which was just like a HRM/Skyliner.

Cheers,

Gil

[novosibir]

Enlarge it, then you even can see, that i.e. it are 100K's on the plates - but that's a Custom Reverb and probably there are different layouts out.

Larry

[novosibir]

But the Signature2 already is goo covered

Larry

[dogears]

Larry,

Indeed you are right, regarding this specific amp. However, Mr Ayan is correct. They have a multitude of variations and models. Many have alternate plate sizes.

[ayan]

Enlarge it, then you even can see, that i.e. it are 100K's on the plates - but that's a Custom Reverb and probably there are different layouts out.

Larry

The interesting observation I can make is that the Custom seems to use MF Xicon/Mouser resistors throughout. I saw three Sig Customs: (1) Two used Dales for V1 and V2 plates and slope resistor. One used high quality NTE (blister pack) resistors elsewhere, and the other high quality CF resistors elsewhere. (2) The other had NTE MF's everywhere; it sounded very nice, and I took a whole bunch of pictures of it. All three had the 220K/150K plate load resistors on V1 and V2.

Gil

[swt]

well...thanks a lot for all the info...specially the schem...will try to dig a little more to get what's that jm amp using...really like the cleans...sounds like a 15" speaker though...