Restoration:

Below is a selected list of restoration services I offer for your vintage tube amp:

• Complete evaluation of your amp. This includes removing the chassis, visual inspection, checking power tube 
  bias current and power supply voltages.
• Cleaning your amp. This includes cleaning chassis for oils and crud, clean and lube all pots, jacks and switches, 
  tighten all nuts, screws and tube socket pins.
• Capacitor replacement. This includes replacing all power supply filtering, bias and cathode electrolytic caps.
• Resistor replacement. This includes replacing preamp plate resistors to eliminate any snap/crackle/pop noises 
  and/or replacing output tube screen and control grid resistors to allow the power tubes to work correctly.
• Tube replacement. This includes re-tubing with a fresh set of preamp and power tubes, and adjusting power 
  tube bias current.

Upgrades:

I can also implement some nice upgrades to your vintage tube amp:

• Removing ground loops. This includes rewiring the chassis ground connections to get rid of the hum caused by
  ground loops. Isolated input and output jacks have to be installed in conjunction with this upgrade.
• Distributed filtering. This includes adding local DC filtering for each preamp amplification stage.
• Power Scaling. This includes re-building the bias and power supplies for the power tubes in order to allow "the
  output power of an amplifier to be varied from 100% down to less than 1% of the full rating." (K. O'Connor)

Retrofication:

If you have acquired a 70's model of a Fender amp but are not entirely happy with its sonic qualities, I also offer the
following services which aim at converting the electronics into an early 60's version (a.k.a. "blackfacing"):

• Bias circuit modification. This includes rewiring the existing bias mechanisms and replacing a few components 
  to allow for a more flexible means for adjusting the power tube bias current.
• Filter circuit modification. This includes replacing a few components in the tone shaping preamp circuit.
• Phase inverter circuit modification. This includes replacing a few components to remove some of the clean 
  sound of the amps from the 70's.
• Removing master volume. This includes removing all wires and components associated with the rarely used 
  master volume circuit. I can also install an improved master volume circuit if you want to keep the function.
• Faceplate replacement. This includes replacing the existing "silverface" faceplate with one that does not have a 
  master volume or even with a genuine/reproduction "blackface" faceplate.
• Complete rewiring. Only for the real vintage amp aficionados. This includes replacing all of the plastic insulation 
  wire with vintage-style cloth covered wire. Not only can a rewire remove many problems with unwanted noise
  and oscillations, it will also look much nicer than the "bird's nest" of wire found in the 70's models.

For owners of reissue amps from Fender, Marshall and Vox, I can offer modifications that will make these amps sound
more like the originals. Maybe of particular interest for harmonica players, I offer modification to Fender's '59 Bassman reissue,
a decent-sounding amp in its own right but unfortunately all too harsh and cold sounding off-the-shelf. So, if you're looking
for the sound of the original Bassman I might be able to help you.