DESIGN OBJECTIVE

Get the sound of a single ended Fender Champ but with more clean head room, three knob EQ, and a tube driven effects loop.  Conservatively rated at 10 watts of class-A, this amp will deliver enough power to be heard on stage over the drums in a small club if you have the right speaker compliment. 

The power amp in the BF-10 starts with two a fixed-bias, single ended parallel power tubes, fed by a tube driven high voltage power supply. Features include huge Mercury power, output, and choke transformers for thick layers of even order harmonic content.

Our tone stack behaves like a typical amp with bass-mid-treble controls, but under the controls are switches for fat boost, 3- way tone control voicing, and a bright boost.  The tone switch voices the bass and mid controls either darker (right), or brighter (left), or full bypass for higher gain and mids (center).

 A full featured effects loop with separate send/return level controls that can add up to 10 db of extra gain boost or cut, series or parallel return path, and a switch for pedal or rack effects level matching.

 

BONUS FEATURES

Attitude control for modern or tweed power tube response

Ground lift switch safely removes hum when connected to other equipment

Dual speaker output jacks, 3 way impedance switch 4/8/16

Stock power tubes: 6550 + E34L experiment with other tubes, also compatible with KT66, KT77, KT88, 5881, 6L6GB  types

Can be operated with a single power tube for different tone (requires bias adjustment)

OPTIONAL FEATURES

Kevin O'conner licensed, variable power scaling from 10 watts down to a quarter of a watt (add $160)

 

CONSTRUCTION

Mercury transformers (3)

Tubes: 6L6 6L6 12AX7 12AT7 12DW7

Sozo vintage blue Astron clone coupling caps in main signal path

Sprague-Atom filter and bypass caps

Carling switches, Switchcraft jacks

Ohmite carbon composition resistors used in plate and other circuits

Point to point contruction with silver and Teflon coated wiring

Finger jointed Baltic birch cabinet

Weight: 28 Lbs.   22 x 10 x 8.5

Warranty: 3 years on everything except tubes (60 days)

Price  $2,000.00

Optional Tuki padded cover: $65

These sound clips were recorded using a single Audix mic into a Korg D1200 without effects. We used a single 8 ohm, closed back 1x12 cabinet (w/Vintage 30 speaker). These clips give you a small taste of the BF-TEN, FX loop bypassed and set for unity gain, other settings noted below and are referenced to the number on the dials: