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Extracting the 5th Harmonic

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March 14th 04, 08:33 AM

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On 13 Mar 2004 22:43:58 -0600, wrote:

Is there some black magic required to get higher order harmonics out
of an oscillator?
I'm only trying to get 17.2Mhz out of a 3.44Mhz source and am thus far
....[snip]....

John L. Reinartz, W1QP, published "A Fundamental-Reinforced Harmonic-
Generating Circuit" in the July, 1937, issue of QST. I don't have a
copy handy, but a followup article "Putting the Harmonic Generator to
Work" in the April, 1938, QST contains this statement:

"It will be remembered that in the harmonic-generator circuit the
crystal oscillator was operated on the crystal frequency only,
and that the following tube was used to generate the even and
odd harmonics up to the 11th and 12th. For our present purpose,
the 8th harmonic is sufficient; that is, 28 Mc. from an 80-meter
crystal...."

Hope this helps.

Five boxes preserve our freedoms: soap, ballot, witness, jury, and
cartridge.

Hey Doc. Should that quote be attributed to you or what?

--
Best Regards,
Mike

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