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#12
June 6th 07, 05:58 PM
posted to rec.radio.amateur.antenna
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HP 8640B External Freq. Doubler?
You don't need the filter. The "push pull" doubler will suppress the fundamental, (By as much as 40 dB if it's well balanced). Just tune the 8640 to 451 MHz and calibrate the output. If you wish to gild the lilly, you could install a HPF with lower corner frequency of 512 MHz, but the original signal isn't much cleaner WRT harmonic content from the dividers. W4ZCB That'll teach me to write before breakfast and engaging brain. Make that a push-push doubler! (Full wave rectifier configuration) The little balun cores in a TV balun work just fine. Make it all as symmetrical as possible. W4ZCB |
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