Text Box: This is a Jus-Tone-built Weber Halle.  I am told the circuit is similar to a Dumble OD-100, but I really have no idea (and don’t much care).  What I know is that it’s an incredibly versatile channel switcher.  The amp was built for my good friend, Tom Kirchstetter: my former drummer and a hell of a guitar player, too.

Clean Channel: Built around 6L6 output tubes, the clean channel is fairly chimey with a big low end and plenty of headroom.  The “volume” and “preamp” controls allow you to adjust the level of grind in two different parts of the gain stage.  This channel has its own full tone stack and an individual level control.

Overdrive Channel: With its “drive” and “predrive” controls, this channel can be tuned for slightly overdriven rhythm tone all the way up to metal chunk.  I was surprised how little sag the amp had for only moderately sized trannies.  

Other Controls: The amp has a global presence adjustment and a push-pull master volume.  The Weber-designed master does not work terribly well and will need modification at some point in the future.  The channels are footswitchable.  The amp will accommodate two speaker cabinets.

Quirks: Because the second channel shares a gain stage with the first, the clean channel tone stack has a slight effect on the overdriven channel.  No big deal, but it is what it is.
Text Box: I took the same design approach I take with all of my amps: overbuild.  :)  Because the Weber kits tend to skimp on some of the details, several parts were upgraded along the way.  Here we have the (mostly empty) aluminum chassis.  The basic hardware has been loaded, including the power transformer, tube sockets, and the first row of controls.  I like to use a buss bar for all grounding.
Text Box: Wiring the heaters is almost always one of the first jobs in any amp.  The leads should be twisted to eliminate the induction of hum in other parts of the circuit.    The leads to the power transformer are left hanging for later soldering.
Text Box: The Weber kit came with a fiber board for all the components.  I like the sturdiness, cleanliness, and ease of working with turret boards.  I bought a Weber universal turret board from www.turretboards.com and made some modifications so I could feed the leads from the bottom.
Text Box: The next step is to wire all the leads for the components that will be masked by the turret board.  Because the pots will be nearly impossible to reach once the turret board is installed, I wire all those connections first.  The input jacks, switches (upgraded), output transformer, choke, and bias pot are also installed.  I opted to mount the bias pot so that it could be adjusted externally.  The original Weber layout requires adjustment inside (don’t want to open the amp if I don’t have to.)