The listing I won was auction style. If you were reaching out to the same seller, chances are they wanted to let the auction run its course. In this case, OBO is a competition, not a chance to get it for less than the listing price based on the seller's mood haha.

Just scored an untested IBM 5998 for ~$50 on eBay, anyone here get the other one?:beerchug: After the arcing, the amp has been acting fine. I need to take the time to give a more thorough reply to everything on here, though I'll save some time and let y'all know I can't comment on Chinese...

The resistor is between the sets of 3 red caps and the caps(?) under the transformer. If you look directly down at the edge of the PCB, there are two resistors with the labels 1M above them. LED here, though I found an orange version of it in the event it was bright enough to complement tube...

So I removed the 220uf caps in parallel with the LEDs, installed the Audio Note Pot, and fired her up. The good news is that the full body of sound has returned. The bad news is that there's a lot of hum and noise. BUT. I've realized that there's a short somewhere bypassing the potentiometer...

This is a moment where I wish that I had read more slowly. If it's true that disconnecting the ground is all you need to do to effectively remove it from the circuit, I would've just done that. Of course I can resolder everything, just gotta make sure I pay better attention. My copy of Grob's...

I'll try it out. I also had the epiphany that there's a chance the output wires were touching in some combination when I put tape over the ends. There's a lot to test after work, but I'm feeling more confident.

Massive points to anyone who can help me make sense of this. I did test with the stock pot and the issues remained.

Don't you put that evil on me Ricky Bobby! I may have been naive to think that I could get away with tearing this thing open and just soldering some new stuff in haha. I'm sure I'll fix it, but I'm more than content to know that if this became irreparable, it's a learning expense. Also a reason...

Is this a fact or a guess? Either way, I'll be spending a lot of time with it tonight going mod by mod. This may be a frustrating scenario having to put it back to stock and listening as I make changes.

Got the Audio Note pot in the mail today, was super excited to tear into the amp and get the mods done. Now it's a little after 1:00am and I'm trying to figure out where I went wrong. Mods attempted: LED biasing mod Fitz mod Desolder the line-out Replace volume pot The Audio Note 100k isn't a...

That's curious, the settings for bs2b on my computer show themselves as a crossfeed level and frequency threshold. As far as live tracks not needing crossfeed help, that makes sense. If we assume a live recording is a stereo pair of mics, the mics are going to record all instruments and also...

Does anyone have the schematic for this amp? I've done my fair bit of searching but maybe I'm looking in the wrong places...

Honestly, I have no idea, I'll just look for screws and things until it comes apart. I did read somewhere that you'll need to take off the front piece around the potentiometer with all the hex screws to change it out.

ADHD actually haha. Disguised itself as an addictive personality and overbearing charisma before I finally got diagnosed last year. Combined with me being an engineer and my love of tinkering, it spells death for any hobby that I pursue. Get your brains checked out, folks! Just like our audio...

Quick update: -Ken Rad mostly burned in after 100 hours, faint hum in the right headphone still remains after ~120 hours, but the stock potentiometer sucks noodles and that's the side that I get more volume in unless I turn it up past 8 o'clock or so. -I've got caps on hand to do the fitz mod...

As a new owner of the 6xx I don't think they're veiled at all, the highs are tamed in a way that I actively appreciate. I do find them to be a little bit forward though. I generally set my volume just under what I normally listen at because vocals can be a little more in my ear than I'm used to.

Thanks Denver! I've been cooking it for a bit but I've committed to just burning it in for a full 120 hours before listening again so I can stop with the guesswork and supply more data sooner rather than later. Come Monday morning I'll try again, but for now, I think I was a little too excited...

New guy checking in, got a Brimar CV1988 (6SN7GT) and Ken Rad VT-231 (staggered plates) for preamp tubes, RCA 6AS7G and Cetron 7236 for power tubes. Playing through some Massdrop HD 6xx headphones. DV 336se unmodded. Music player is Foobar2000 using a plug-in that introduces some cross-talk so...