• If you have bought, sold or gained information from our Classifieds, please donate to Group DIY and give back.

    You can become a Supporting Member which comes with a decal or just click here to donate.

TRADE: 2 x UTC O-1 with O-17 shield + 1 x UTC A-18 for 1 x UTC A-24 silk screen (OPT or TRW or UTC)

Help Support GroupDIY:


Aug 6, 2020
Washington DC
The title says it all folks, I am looking for the unloved unicorn: A black on grey OPT A-24 transformer...This is what I have on my lone LA-2A build and I am planning to build a second matched one. But I will accept any of the silk screened UTC A-24 (UTC/TRW/OPT). In exchange, you will get a pair of UTC O-1 with matching manufacturing number, a pair of O-17 shield and a UTC A-18. Those are nice if you are planning a stereo pair of 176/175. Do not hesitate to contact me if you prefer to sell your A-24. Thanks!

Last edited:

Latest posts