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tunghaichuan

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About tunghaichuan

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  1. Update: Just checked a V2 VJ OT against a Champion 600 chassis. The stock OT is slightly smaller than the VJ OT. Also, the stock OT is very close to the 6V6 tube, almost touching it. It looks like the VJ OT will fit but just barely. I will have to unbolt the stock OT and mount the VJ OT in the chassis to see if it fits okay. It may not work with a 6V6 with a larger diameter, such as the JJ 6V6S. More later. tung
  2. The 7.5K primary on the stock V2 VJ is a better match for a 6V6 than an EL84. I would speculate that it was probably a champ OT to begin with. I believe the mounting centers match as well so the VJ OT should bolt right up without any modifications to the chassis. Thanks for the idea. I was considering replacing the stock Champ 600 OT with another, and it didn't even occur to me to use the V2 VJ OT. tung
  3. I bought an older, used 25W MiniMass a while back. The rheostat was flaky so I emailed Ted Weber to see if I could buy a new one. He sent me a new 50W rheostat free of charge, great customer service. My unit is now a 50w MiniMass. As said in previous posts, they are good for knocking off a few dBs but when turned all the way down, it sounds like a blanket over your speaker cabinet. Mine lacks the treble switch as it is an older unit, and it could sure use one. Here is a schematic: http://freestompboxes.org/members/soulsonic/schematic/WeberMiniMASS.gif tung
  4. I've tried a few Boss distortion and OD pedals for the Valve Junior. In fact, a modded VJ head is my main amp right now. I run Boss pedals into the front end for my sound. For OD pedals, I like the OD-2 Turbo OD and the SD-1 Super OD. I have a Digitech Bad Monkey and a Boss BD-2 Blues Driver, but they don't sound as good to me. The BD-2 works better as a clean booster: volume all the way up, gain all the way down, EQ to taste. For distortion I like the Boss MD-2 Mega Distortion and the DS-1 Distortion pedals. Unlike most people, I like the sound of the stock DS-1 through the VJ. The MD-2 takes a little tweaking to get a good distortion sound dialed in. HTH, tung
  5. Chris, I've never seen a Socal 50 in person, just the schematic. I would guess from looking at the pictures that the bias pot is on the PCB. So you'd have to remove the chassis every time you wanted to change the bias. As far as the schematic is concerned, since the amp is still in production, I'd rather that you requested it from Epi's customer service: Customer.Relations@gibson.com HTH, tung
  6. Epiphone's customer service department was kind enough to send me the Socal 50H schematic. The amp is adjustable fixed bias. Depending on the brand of tubes that come with the amp and the stock factory settings, it may be a good idea to have a tech adjust the bias for better tone. The good news is that Epi put in a adjustable pot to set the bias. Some amps just have a resistor that needs to be swapped out to set the bias, which can be a PITA. Some amplifier manufacturers are known to bias the amp on the cold side so that the tubes last longer. This doesn't necessarily mean that Epi does this. Bottom line: the only way to be sure is to have a tech check the bias. This isn't something that you want to do yourself without amplifier safety knowledge and experience. It is too easy to damage the amp (or more importantly yourself) if you don't know what you're doing. You will definitely have to have the amp re-biased when you change the output tubes. tung
  7. One guy I knew said that the Hellicasters were like three country & western Steve Vais in one band :- I think he meant it as a compliment. LOL tung
  8. Three of my favorites, yet criminally underrated: Buckethead. The guy is weird, and way out there, but his playing grabs me. Some criticize him for his weirdo schtick, but I'm not so sure it's an act David Lindley. This guy can literally play anything with strings on it, guitar, banjo, fiddle, bazouki, saz, oud, you name it. He's been making tasty world music for decades. Bill Frisell. He just keeps getting better and better. tung
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