The Harp Mic Shop

Item - BOG10PAH

This Bogen CHB-10A is one of the Hottest 10 Watt tube amplifiers ever made for Blues Harp and they will outperform most 15 to 20 Watt amplifiers in terms of actual audible decibels of sound.

Many harp players know that Single End tube amplifiers typically deliver better tone for Blues Harp than the larger Push-Pull Amplifiers but they lack the volume to be heard among the other stacks of speakers and amplifiers.

This Bogen CHB-10A delivers a solid 10 Watts of Pure Tube Power with 14 Watts of Peak Power. The stock CHB-10A utilizes a model 7868 Power Tube and a 12AX7 Preamplifier Tube and it really puts out the sound for a small amp.

This particular Bogen CHB-10A has been customized specifically to provide that Gritty Distorted Tone so often associated with Chicago Style Blues. The power supply has been inspected and the power supply capacitors have been replaced and upgraded as necessary. The values of the inter-stage coupling capacitors have been increased to pass more bottom end through the entire circuit. The screen voltage to the Power Tube (7868) has also been lowered to allow use of a 6GT5(A) Power Tube in place of the 7868 tube if desired (The 6GT5(A) is a larger diameter tube than the 7868 and provides a slightly different tone).

Additionally, the preamplifier tube has been changed to a 12AT7 tube which has a lower gain and decreases feedback.  The amplifier comes with a Good Vintage Sylvania 12AT7 Preamp Tube and a Nice Fat Sounding NOS RCA 6GT5A Tube.  Also included are the original Sylvania branded 7868 tube and a new EH 12AX7 tube to provide a little tonal variety for your pleasure.

As you can see in the pictures, a 1/4” jack has been installed for the Microphone input and a 1/4" jack is also installed for the Phono input.  The Tone control and both volume controls are working perfectly. A 1/4” jack has been installed to provide a speaker connection.

The amplifier cabinet measures 11 1/4” x 8” x 5 1/2” and has a grounded power cord and fuse. The front panel has volume controls for both the Microphone and Phono Channels and has a single knob Tone Control.

The 10 Watts of Raw Tube Power this amplifier delivers is sufficient for most small venues and is perfect for recording sessions. 

The amplifier is capable of pushing a pair of 10” or 12” speakers, a quad of 8” speakers and supports loads of 4, 8 & 16 Ohms so that you can use nearly any variety of speakers with the amplifier.

The amplifier weighs just under 10 pounds so it's small and lightweight and easy to deal with. The cabinet is in good condition but does have some tape residue on the top and one side panel of the CAbinet

All electronic components are in excellent condition and any aging or damaged components have been replaced with reliable replacement parts.

This is an amplifier you can count on to work when you need it to!