Pictures of the Ultra Transistor 101 radio Side view of set Description of the Ultra Transistor 101 radio I have purchased some AA battery holders which I'll use to power the set and in the second part of this post, when I deal with the refurbishment and repair, I'll explain any steps I had to take to get it working. ![]() This model used two 4.5 V batteries in series to supply a -9v rail for the PHP transistors as well as a -4.5v rail which provides bias to the output stage transistors via the loudspeaker 1. Internally, the actual chassis which the PCB is bolted to seems to be a bit loose in the cabinet, but I don't yet know why this is.Įlectrically, at the moment I don't know if the radio is working because I don't have a set of batteries to try it with. The bottom of the unit has got some flaky paint, but that should clean up and if necessary could be re-painted without too much trouble. The front panel, which seems to be made from a plasticized hardboard, is also in good condition with all the transfers showing, and the visible part of the case itself just needs a bit of a clean and polish to be as new. Camera Blog Blog posts written for the camera section of the site. ![]()
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