Tube-Sonic "Blues" 10 amplifier Prices as
of January 2010 :
“Blues 10” Standard $ 1000.00 USD + tax and shipping
Blues 10 guitar amplifier specifications
Power Output: 12 watts RMS
Speaker 8 ohm: 10 Inch Weber Signature 10s
Tone Controls: Volume , Treble, Bass and Middle
Tube Compliment : 1 - 12AX7 , 1 - 12AT7 ,2- 6V6GT , 1- 5Y3GT
Product features :
All transformers custom made by Mercury Magnetics
Weber 10-CS or Jensen C10R 10 inch ceramic magnet speakers.
High quality Switchcraft jacks for input and speakers
Mallory 150 series tone and coupling caps
All tube sockets are high quality ceramic units
The very highest quality 3/4 inch birch plywood cabinets covered in beautiful
lacquered tweed.
Chassis is powder coated 16 gauge steel with fully welded corners.
Stainless steel fasteners
Cabinet covering/ grill cloth : Custom colors available for small additional
charge.
Circuit description
Preamp: The two tube preamplifier is on a .091 inch thick double-sided PC
board that uses very high quality thru-hole construction for absolute ease
of parts replacement in the unlikely event that it should it be needed. Both
preamp tubes are fully shielded for quiet operation. The 2-stage preamp uses
a 12AX7 first stage followed by the tone controls and the second half 12AX7
as the second gain stage. This is followed by both halves of a 12AT7 configured
as a grounded grid type phase inverter/driver. This preamp is not a copy of
a fender design and has a sound unique to this amplifier.
Power Amp : The power output stage is a Class A , cathode bias output stage
using 2 - 6V6GT output tubes. The output stage and all other wiring is point
to point using vintage cloth covered push back wire.
Rectifier : The rectification is handled by a 5Y3GT dual diode rectifier .
Filter capacitors in the power supply are high quality Sprague "Atom"
electrolytic. The power supply is on a separate PC board of the same construction
as the preamp board for serviceability.
Resistors : Resistors are carbon composition for tone affecting positions
and low noise metal film elsewhere . The pots for the tone controls are plastic
shaft CTS units. They are not mounted to the PC boards but rather are attached
with flying leads. This prevents PC board damage if the pot gets physically
damaged.
Capacitors: Coupling capacitors are the Mallory 150 series and are used for
all coupling and tone controls.