Hate to say it, but it's most likely the guitar, bad (or non existant) ground within your amp or where you have it plugged in, or your guitar or power cable. Sounds like a ground is loose somewhere in the guitar, or maybe reversed, or the main ground in your amp is loose or miswired, or the grounds in your playing location is faulty. There *shouldn't* be any hum other than normal 60hz or 50hz hum from the single coils, even with the knobs maxed. hiss yes, hum, no.

Yup. Les Paul 70's tribute, with their new "hot" mini humbuckers. Amp is an HRM Bluesmaster, of course. I have the TC Corona chorus set to sound sorta like a leslie, and the reverb, believe it or not, is an EH Nano Holy Grail. I recorded it on an iPhone. YouTube compressed it a bit, though

Me noodlin around. clean channel tc corona chorus, light reverb. my poor rendition of Chitlins con Carne. Short clip

Yes you can. I usually put a mouser catalog at each end of the chassis. This gives plenty of clearance of the tubes and trannys off the work surface. Weber also makes a workbench amp cradle for this purpose. It's pricy, so I stick to my mouser catalogs

Gregg

i normally gently lay mine face down on a soft pillow, take the tubes out, and back the screws out leaving one in. then i use one hand to steady and brace the chassis and back out the remaining screw then slowly let the swing down, then lift it out. easy peasy!

Gregg

Glad everyone is finding their tone!!!

Cool.  I will let you know soon!

Thanks, Henry.
Gregg

That's kinda how i feel too. I can do some jazzy stuff, but not like most of the guys on here.

i wouldn't chance it

I know what you mean i need to borrow some recording equipment. I keep saying that but I never seem to. It's similar to my need for diet and exercise...

It's amazing how we all have our unique approaches to get our sounds out of this amp, and even more amazing that we are all able to coax such different sounds from it. It really shows how versatile the BM really is, in my opinion.

Thanks for the reply, Henry.

Any chance of getting a tall one built with that light faux tweed  tolex (not actual tweed fabric) and an oxblood grill?

Gregg

Henry,

Any Tall Blonde Cabs with an Oxblood grills left?

Gregg

Indeed it is. I was going for the more raw, heavy, thick Fender/Early Marshall sound, and the Telefunken/JAN GE 5751 combo along with the Tung Sol 6L6GC-STR nails it, especially with the Weber Alnico 1265/Weber Neo 12 speaker combo. The GE Long Plate tubes and the TAD 6L6WGC-STR bring out the more Dumbly sound especially when i run the two Weber Alnico 1265's. Incredible how versatile the Bluesmaster is.

First of all here's the disclaimer : Tube amps have high voltage and amperage and can kill you so be careful!!

Now The best way to find your Plate and Screen Voltage on your amp is to drop the chassis, set it up on your bench. Print out the layout for your amp so you can see which pin is which, then put all the tubes back in. now plug a speaker or a good dummy load into the speaker output and fire her up. allow everything to heat up. Take your multimeter, plug the negative lead into the black bias ground spot, and set your meter to read DC voltage in the 100's range. Very carefully check Pin 3. You will hear a slight pop through the speaker, this is normal. The value you see will be your Plate Voltage write that value down for future reference.  Now carefully check Pin 4. This will be your screen voltage. Write that value down for future reference. Do this for both tubes. Now that you have your correct Plate voltage, you can more correctly set your Bias. The Plate and Screen may be about the same, depending on your model of OTS, or exactly the same. Some amps have vastly different Plate and Screen Voltages. Also, it's a good idea to check your wall voltage to see what you have coming out of there. On the OTS series Plate Voltage should average around 450 VDC, some run a lil lower, some run a lil higher. If the Plate Voltage is way high, it can cause your output tubes to overdrive at lower volumes. If the screen voltage is way off, you could have a tube problem or Once you know your plate voltage, you can properly set your bias as well, using the forumula in the manual. a good starting point is 55% Idle current. If your bias is too low you can get crossover distortion, if it is too high it will be "hot" and tend to overdive more.  Hope this helps!!

Gregg