The Amp Garage

You shouldt have a 25K presence pot instead of the 5K

Larry

And what type of Dumble is this here?

mlp-mx6 wrote:I hate that I bothered you all with this when what should have been my first approach was not tried.

No need to be embarrassed, because 'this' is it, for what forums are.

Larry

Tdale wrote:... that if he puts a Carl Martin compressor in the effect loop of channel 1, all hiss and buzz goes away!

Maybe the reason for the buzz and hiss w/o anything plugged in simply is a dirty/oxydated switching contact on the Return jack?

Put in a patch cable from Send to Return, to verify this!

Larry

Michael, simply try another input tube - maybe then your prob is solved! I've experienced, that i.e. the reissue TungSol 12AX7's sometimes do have huge hum issues - sometimes permanently - sometimes the hum rises up after 5-10 min warm up of the tube. The TS's do have wimpy aligned filaments inside ...

I'm sure it's possible he looked at more than a few other products for "inspiration". :lol: I'm even convinced about it :lol: Btw. An interesting low-cut also might be the 'Slope Control' from the Marshall Bass amps - 3 RC networks cascaded and through a common pot to ground -> -12dB/Oct., although...

I don't see any inductors, unless they are real tiny... As he's already supposed: As far as I know, the Filters are indeed simply RC networks . And for building a network for tone shaping with a high edge steepness, it doesn't require inductors, when it's designed as an active topology around a tub...

No problem with the 470 on the screens and 3.3K on the control grids, as long as you stick w/ 6L6's - EL34's although require 1K/5W on the screens and (at least) 5.1K on the control grids. I'm usually using 10K's on the control grids, the increase still isn't inaudible, but with 10K's I feel more on...

And also his voice is 'remarkable' for a 13 y.o. youngster

I'm shure, that he'd have a great career in future - not every day such a exceptional talented child will be born

Larry

billyz wrote:Just wondered if It the same as adjusting the "Soul" resistor.

You're right! The variable FB resistor some call 'Soul Control'.

Larry

Jack wrote:I wonder if using sort of a bright cap on the 50K pot "dampening" scheme would work?

Shure, works flawless!

But start with a very small value for cathode purpose! I'd recommend to start w/ a .0047 or a .01, soldered across the 50KC (rev. log.)

Larry

oldmacman wrote:He doesn't play anything I haven't heard before.

Shure, I also have heared all what he's playing already before, but...

... all the guitar players, playing SRV stuff with this perfectness have been already much older than just 13 years, sometimes even very much older...

Larry

Good delivery of insight, Bjorn!

Btw. welcome on this place!

Larry

No, as long as you keep the relation, but you also have to include the pres cap into the relation bill!

Example I: 100K FBR; 5K pot; 0.1 pres C

Example II: 50K FBR; 2.5K pot; 0.2 pres C

Larry

For attenuation...you might wanna try to use a 50K rev log pot in series with the phase inverter's 470 ohms or so cathode resistor to starve the PI current. I know it'll sound different compared to a brake but it is a cheap and fast way to save a marriage! :wink: I got this one from a Marshall orie...