The Ameco CPO
Referring again to the recent buy of stuff from Ebay mentioned here: https://wb9kzy.blogspot.com/2026/06/buy-first-think-later.html I started fooling with the Ameco Code Practice Oscillator: from the original listing It looked a little grungy both outside and inside but it did fire up. There are two holes marked N and P which must have been used for wiring to an external supply / charger. Inside a mod was made to the battery holder (A Keystone, they still sell them !) to add a diode and two GE AA Nicads. Of course the Nicads have leaked to the extent of having the wiring to the holder corrode off. As a first step I removed all the screw and bolts from the front panel: And then washed it with some liquid soap: I think it looks OK. Here's a photo of the CPO parts themselves: Next step will be to replace that battery holder with something new - not sure if I should get the original Keystone or just use a plastic one. I'll have to think about it. OK, I th...