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Series Modulated 807 by Bob, WB9ECK |
Now
you can have a nice small 25 watt transmitter/exciter requiring only
four tubes and NO modulation transformer. Hi-fi and no iron required.
What's not to like?!? The transmitter output is adjustable from zero to
twenty five watts output with 100% modulation. If you run about 15
watts the positive peaks will be somewhere around 115% while the
negative peaks remain below
100%. Works great for driving a grounded grid linear.
Here's a high resolution PDF version of the schematic, suitable for printing.
Check out some photos of the rig.
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