David Bogen
Bogen is the best-represented maker in the archive, and almost all of it is public-address equipment. The Challenger amplifiers range from the 18-watt CH18 and the 6V6-powered CH20 to the 100-watt CHB-100 with four 7868 output tubes. Two MX6 and MX6A units are microphone mixers that fed those amplifiers. The ST-10 offers preamp and cathode-follower outputs, and the Presto-Bogen DB-230 and VP-10 come from the years Bogen and Presto Recording were run as one division.
The listings are unusually practical. Several sellers brought their amplifiers up slowly on a variac, reported exactly which tubes were fitted, and described hum, faint output or earlier repairs. Read together, they make a fair picture of what to expect from a Bogen that has sat unused for decades.
Many Challengers now live second lives as guitar amplifiers. The Bogen maker page covers the company from 1932 to the Lear Siegler years.
9 entries
David Bogen Company
Bogen Presto VP-10 Tube Amplifier
Ten watts from a single 7355, with microphone, guitar and phono inputs.
David Bogen Company
Bogen Challenger CH18 Mono Tube Amplifier
An 18-watt Challenger PA amplifier in unusually clean condition.
David Bogen Company
Bogen Challenger CH20 Mono Tube Amplifiers
A pair of small Challengers with 6V6GT output tubes and their original cages.
David Bogen Company
Bogen Challenger CHA-30 Tube Amplifier
A Challenger with its large early 6L6G bottles, praised for guitar and harmonica use.
David Bogen Company
Bogen Challenger CHA-35 Mono Tube Amplifier
A repaired Challenger, brought up carefully on a variac, with a low hum to sort out.
David Bogen Company
Bogen Challenger MX6 Microphone Mixer
A four-microphone tube mixer that fed Bogen power amplifiers in schools and halls.
David Bogen Company
Bogen CHB-100 Tube Amplifier
The big Bogen: 100 watts from four 7868 output tubes.
David Bogen Company
Bogen MX6A Tube Mixer, Lear Siegler Era
The later MX6A mixer, from Bogen's years as a Lear Siegler division.
David Bogen Company
Presto-Bogen DB-230 Stereo Tube Amplifier
A 1959 integrated stereo amplifier with RIAA and 78 phono settings.