So Collins made some of the best sounding tube equipment from the late 1940s through the early 60s and this Collins 12Z is evidence of that. The build quality of this surpasses most other American makers of the time and rivals the German equipment made by Telefunken, EAB, and others of the same period. The 12Z is so overbuilt right down to the machined aluminum knobs. It is packed with transformers made by Thordarson, and attenuators by Daven. It is four inputs with a single output and will run on AC or batteries. All the transformers are. Good, it should be looked over by a tech to make sure all the caps are 100% before being used. Comes with orig power cord (not shown). The item “Vintage Collins Radio 12Z-2 Portable Tube Input Microphone Mic Mixer Preamp Amp” is in sale since Thursday, October 22, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Other Vintage Electronics”. The seller is “flagshipaudio” and is located in Ponte Vedra Beach, Florida. This item can be shipped worldwide.