Remote antenna change
#6
(21-03-2018, 10:24 AM)VK3LU Wrote: Doug,
Is your RFC 10 millihenries or 10 microhenries?

Nev

I used 10mH (well that was what it was marked)  - but a style suitable for RF, not audio - that I had on hand.  The value is not critical so long as XL > 500 ohms at the lowest frequency in use (ie 1.8MHz) & that calculates out as about 50uH (=565 ohms).

XL = 2piFL
     = 2 x 3.141592653 x 1.8 MHz x 50 uH
     = 5.7E+02 ohms (to 2 significant digits)
     = 565 ohms 

Use anything from 47uH/50uH upwards in an RF style when working at a 50 ohm impedance.
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com

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Messages In This Thread
Remote antenna change - by VK4WDM - 20-03-2018, 09:17 PM
RE: Remote antenna change - by VK3ALB - 20-03-2018, 09:33 PM
RE: Remote antenna change - by VK1JA - 21-03-2018, 07:32 AM
RE: Remote antenna change - by VK4WDM - 21-03-2018, 04:02 PM
RE: Remote antenna change - by VK4ADC - 21-03-2018, 07:35 AM
RE: Remote antenna change - by VK3LU - 21-03-2018, 10:24 AM
RE: Remote antenna change - by VK4ADC - 21-03-2018, 01:45 PM
RE: Remote antenna change - by VK3LU - 21-03-2018, 02:01 PM
RE: Remote antenna change - by VK4ADC - 21-03-2018, 02:20 PM
RE: Remote antenna change - by VK1JA - 21-03-2018, 06:25 PM

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