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Old 08-08-2013, 11:06 PM
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Winky Dink Winky Dink is offline
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Join Date: Apr 2010
Location: Meridian, Idaho.
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Another look.

Jr,
Regarding the wiring of the 47K resistor (R1), I don't see what you see. One end is grounded; the other end goes to tube pin 4 and C5 (68pF). Here's an updated photo of my build and the original schematic:





(Note to all: This is a tried and true design. See the whole story at Phil's Old Radios. This will take you to the AM Transmitter article: http://antiqueradio.org/transmitter.htm
If I knew what I was doing I'd be tempted to improve on this design, but I need to stick with the original which others have built successfully.)

And here are the voltages I get:



This is as far as I got with the project two years ago. I looked at the old notes, and the voltages were basically the same as they are now. So, do these values or the wiring seem true to the schematic and the expected function of the device?

To Username1: Thanks for the link to the impedance-matching article. I have not yet read it, but I see its relevance and will get to it as soon as I can.
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