Fender Bassman 5B6 amplifier
- Circuit analysis
- Parts from the graveyard
- Output transformer characterization
- Transformer pinouts
- Chassis finishing
- Wiring it up
- Hum hunting
- Too much bass
- Hum hunting II
- Phase inverter distortion
- Hum hunting III (power supply ripple)
- Bass control
- Master Volume
- Bumping up the power supply voltage
- Experimenting with 6V6 power tubes
- Sound clips
A friend helped me get some boards cut with some hand tools (hand planer, hand saw, etc). He turned out some pretty bad-ass, flat, square boards. The wood is 3/4" Peruvian walnut.
There's the box glued/nailed together. It still needs sanding and finishing.
There's the grill I'm making for it. I found some 1/8"x1/2" aluminum stock and a sheet of flattened aluminum mesh on ebay. Ebay has a surprising assortment of metal in hobby quantities. All the aluminum together was about $25. That may seem expensive but most metal vendors don't do small quantities.
The grill turned out really well. Aluminum is surprisingly easy to work with and paints well. I used the same primer/paint/clearcoat as for the chassis.
This clip was recorded with an SM57 clone about a foot from the cabinet. The cabinet is a DIY 1x12 open back cab with an Eminence Swamp Thang (a bass-heavy speaker). The guitar is a MIM Telecaster with treble maxed out. The first bit is the neck pickup and the rest is the bridge pickup. Note: the occasional clicks are an issue with my recording setup, not the amp.