NN1G still troubled

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From: W. Daniel (pandora!daniel@Think.COM)
Date: Wed May 25 1994 - 15:19:13 EDT


Hi Gang,

        Here's my second attempt at an appeal for help with my NN1G. Like I
said in my previous message, my rig was putting out close to 9 watts of
power (now I've managed about 11 watts). The waveform I see under a scope of
the output, is not a pure sine-wave, it is distorted. Here's what I need to
know.

1. Am I right to assume that since the half-wave filter was designed
        with a lower power output in mind, I will now be unable to match the
        output of the filter to my antenna, taking the input impedance to
        the filter to be Vcc^2 * 2 * Po (where Po is the output power and
        Vcc is the supply rail voltage).

2. What is the best way to reduce power to the nominal power output
        level?

3. If everything is working properly, what should I see under the scope
        at the output? How much power should the watt-meter read typically?

4. What steps can I take to eliminate parasitics and other spurs?

        Tks for any help.

73,
Daniel

-- 
+-------------+-------------------------------------+
| Daniel Wee  | daniel%pandora@csah.com             | ** Man needs more
| UUCP1.12b   | daniel.wee@f516.n600.z6.fidonet.org |  than a new start, he
| SNEWS 1.91  | csah.com!pandora!daniel             |  needs a new heart! **
+-------------+-------------------------------------+


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