For Sale: Amp removed from a ER-20 Hammond tone cabinet. Also used in DR20 cabinets.
The amp includes all tubes as shown. I believe it's working correctly as is and will sound good with the correct field coil speakers or regular speakers with correct heavy duty resistors (2000 ohm and 250 ohms?) for the field coil load and regular speakers but am selling as is, described as carefully as possible. Info available online how to do this just google.
When connected to a Hammond CV organ the amp worked and had decent sound quality, got reasonably loud but did not sound like full volume level. I took video during testing of the organ and can share the link so at least you can see the amp works and also powers the organ's preamplifier.
The cabinet had a couple issues not related to the power amplifier- the reverb preamplifier had one bad tube and the Jensen A12 field coil speaker connected to the preamp had a bad field coil with very high resistance. Also the oil reverb tubes were empty and assume the crystal pickup on the reverb was bad as have read they almost always are.
If you are familiar with the ER-20 you will know that one speaker output on the type G amplifier goes to the reverb preamp which then connects to the field coil speaker. Before parting out I tried hooking the tone cab up to the headphone output of a CD player to see how it would sound. First I made a 6 pin adapter that also supplied AC power to the cab and connected to the reverb preamp. It worked but volume was pretty low and there was some hum, moving the three position switch on the preamp to the right increased volume a little and decreased hum. Then I removed the reverb preamp and hooked up 6 pin adapter with AC power directly to the type G and plugged in the Jensen A12 directly to the type G amp. Powered on and got a hum that started to get very loud so after about 5 seconds I cut the power. Tried it again with same results.
Later when testing the Jensens found the one that had been connected to the reverb preamp was bad and had extremely high resistance (500,000 or more ohms?) which I think was the issue.
Email for additional/higher resolution photos.
Send zip code for a shipping quote- should be between $14.99 and $34.99 if you are in USA. (July 2016).
