If you can find a manual for a bird wattmeter, they had a chart in the back of how long to make cables to go with the meter for different freqs. With this setup, you could insert it in a system and after tuning remove the meter setup and still have it balanced. Mike ----- Original Message ----- From: [EMAIL PROTECTED] To: [email protected] Sent: Tuesday, September 23, 2008 4:45 AM Subject: [Repeater-Builder] coax length
Dear RP, I am doing some testing and have the 145.410 repeater connected to a dummy load. To get an accurate output indication in watts is it critical to have 1/2 wavelength cables? I have used an 18" cable from TX to wattmeter and then a 72" cable from wattmeter to load resistor. I have noticed a big difference in wattmeter indication between using the 72" cable and connecting the load right to the wattmeter. Also the same indication with a cable 144" long. I am making some cables 1/2 wavelength long for tuning use. Am I doing right? Thanks, Collin
