Catalinbread ValcoderMaker: Catalinbread Model: Valcoder Condition: New Description: The Valco company of Chicago made amplifiers under their own name in addition to building amps for other companies such as Supro, National, and Gretsch, to name a few. Most of these were lower powered amps with a great sounding natural tube breakup and many models also featured a unique sounding tube driven tremolo. It had a hypnotic throb and was also capable of hard, choppy tremolo.