|[AMRadio] 50 ohms simple question|
ars.w5omr at gmail.com
Thu Apr 5 15:57:35 EDT 2007
> Alan Beck wrote:
>> Basic question
>> Why is it that my radios are 50 ohms and the impedance at the feed
>> point at
>> the antenna (pure dipole) is 70 ohms.
> No, yer not mistaken.... but, if you want to lower the input impedance
> to your dipole, bring the legs down to around 40 degrees, and you'll
> drop the input impedance to the antenna down around 20 ohms.
> Geoff, Alan, Et al,
> Both of you are RIGHT - BUT - almost EVERY radio/amplifier will tune
> from 50 ohms to about 75 ohms.
> So futzing with the antenna MAY not be NEEDED!
I didn't say he -had- to. I just made the suggestion, if he -wanted- to ;-)
73 = Best Regards,
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?
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