The Amp Garage

As I said, mine does do that same thing Tonegeek's does. That said, I do measure mine with the power off.

heisthl wrote: The PI rejects hum, your OD is geting 44uf and your CL is getting 66uf, are the lights turning on yet?

Ah... Lights are on low, but they are working now... I was not thinking about it that way.

Thanks..

Some seem to think that part of the mojo is the capacitance of the shielded wire rolling off a bit of high end. Some of the stage photos I've seen show guitar cords (not patch cables, 15'-20' of guitar cord) connecting the amp to the D'lator. You'd be hard pressed to put that much cable into your a...

I just installed an built-in D'lator in my 2x6L6 test build. The layout file 97_ODS_HRM_loop.jpg was helpful. I think that might have been Normster's layout. I ended up just using one Resistor and Cap to make an extra node for the d'lator power. I know there are some that say you need as much as 4 e...

heisthl wrote:My run there is usually about 4" but it makes an audible difference in taming any harshness.

Interesting.. I might try that. Where do you end up grounding the shielding? Near the tube?

You would think measuring the resistance of the OD trimmer would be the same whether amp is off or not but in this case: Resistance of OD entrance trimmer from wiper to ground with amp off = 13.7k same measurement with amp on but on standby = 8.1k same measurement with amp on, standby off = 13.7k I...

Some of the older amps -- the holy grail ones to some -- with the Radio Shack shielded wire probably have in excess of 100pF per foot... add it all up, and it begins to make an audible difference. I am using bunch of shielded wire removed from a set of old organs. I just tested it. Comes in at 90+ ...

Currently:

Preamp: EH - 12AX7
OD-Section: GT-12AX7M
built-in Dumbleator: EH - 12AX7
PI: EH - 12AX7

Structo wrote:I ordered a EVM 12L Classic from AMS.
Should get it later this week.

It will be interesting to see what you think.

But I couldn't get rid of the harshness, no matter, where the OD trim pot was set to. The Ceriatone OT seems to be better suited for British Style sounds than for dumble-ish IMO, so I've installed a fix treble bleed after the resistor after OD2's plate with a .001 Silver Mica and a 390K to ground, ...

I have now installed an treble bleed with 500K pot. And it seems to be working nicely. I have it set somewhere around 100K. The snubbers are currently 250p. This amp is starting to come into shape. Anyhow, I want to thank everyone for their help so far.

dave g wrote: A whole topic on the BM:

http://ampgarage.com/forum/viewtopic.php?t=3344

Thanks for the info. It's helpful.

Sorry for the double post.

I've built a few of these and they're consistently great sounding amps. Very smooth and forgiving OD. Check out Mitch Farber playing on at the NY Amp Show: http://www.youtube.com/watch?v=DBaeF61HYcI&feature=related (Chuck's playing a bluesmaster) Wow, I like that bluesmaster clip. which schematic i...

I've built a few of these and they're consistently great sounding amps. Very smooth and forgiving OD. Check out Mitch Farber playing on at the NY Amp Show: http://www.youtube.com/watch?v=DBaeF61HYcI&feature=related (Chuck's playing a bluesmaster) Wow, I like that bluesmaster clip. which schematic i...

Structo wrote:I've heard a few guys like the Eminence Red, White and Blues speakers in the D clones.

Isn't the red, white and blues designed after either an JBL or EV?