"Li'l 7" AM Transmitter

[Winky Dink]

A few weeks ago I completed a "Li'l 7" transmitter from the schematic and instructions on Phil's Old Radios, http://antiqueradio.org/transmitter.htm

I designed my variant of the Li'l 7 so that the whole chassis lifts from the enclosure without even removing any knobs.

It looks great...but it doesn't work! I've gone over every connection and every wire three times, tested continuity wherever I could, tracked the input from my CD player to the tube, and tried multiple frequencies on two different radios. I also learned that it's not a good idea to discharge a capacitor into your headphones.

The only variation from the original design is that I used two 68 mfd caps in place of the specified 22 mfd caps, but I don't think that should make much difference. I'm hoping there's something obvious that I've overlooked.

The link above to Phil's website shows the schematic and description. I don't know what to do next. Any suggestions?

- Winky