Kalamazoo Model Two
A Little Blast From The Past
This little gem, brought in by a local customer, was a favorite among guitar and harmonica players in the late 1960’s and early 1970’s. Made by Chicago Musical Instruments, the parent company of Gibson at the time, from 1965 thru 1967. The amp came in with low and distorted sound. Although the capacitors were not original they tested leaking DC and were replaced. One of them was double the capacitance specified in the schematic, Six of the carbon resistors had drifted out of tolerance and were also replaced. The rectifier tube needed replacing as well. All of the other tubes tested well. The amp was then bench tested and the bias on the EL34 was checked. The bias was within spec on the plate dissipation.
Number of Channels: Single channel
Total Power: 20W (5W setting)
Speaker Size: 1 x 10" Celestion V-type Speaker
Preamp Tubes: 3 x 12AX7
Power Tubes: 2 x EL34
EQ: 3-band EQ
Inputs: 2 x 1/4" (high, low)
Outputs: 1 x 1/4" (16 ohm internal), 2 x 1/4" (single 8 ohm or 2 x 16 ohm), 2 x /14" (single 4 ohm or 2 x 8 ohm), 1 x 1/4" (DI out)
Effects Loop: Yes
Power Source: Standard IEC AC cable
Weight: 32 lbs.