Re: [Elecraft] How Accurate of 50-Ohm Dummy Load for 50 Watt TX Gain Calibration?

2015-03-28 Thread Phil Hystad
Thanks to Wayne, Tony, and Don for their answers to my question. I am going to use my DL-1 20-watt load and do the calibration manually and monitor the heating of the resistors (actually, I have a nice Fluke temperature measurement tool to do job if needed). 73, phil, K7PEH > On Mar 28, 2015,

Re: [Elecraft] How Accurate of 50-Ohm Dummy Load for 50 Watt TX Gain Calibration?

2015-03-28 Thread Wayne Burdick
Anything under 2:1 will allow the TX GAIN calibration to work, but I'd shot for < 1.5:1. Wayne N6KR On Mar 27, 2015, at 5:27 PM, Phil Hystad wrote: > I have two dummy loads that might be useful for the 50-watt TX-gain > calibration but neither of them are dead on with a 1:1 SWR and 50 ohms

Re: [Elecraft] How Accurate of 50-Ohm Dummy Load for 50 Watt TX Gain Calibration?

2015-03-28 Thread Tony Estep
Phil, Your 20-watt dummy load will work with the automated procedure, and it is the best one because if the SWR is over some threshold you'll get a "SWR too high, calibration failed" message. The 20-watt load is very unlikely to overheat; my 10-watt load did not overheat, because the 50-watt tran

Re: [Elecraft] How Accurate of 50-Ohm Dummy Load for 50 Watt TX Gain Calibration?

2015-03-28 Thread Don Wilhelm
Phil and all, There are two types of dummy loads - one is simply to provide a load to your transceiver or amplifier for a quick sanity check that the transceiver or amp is providing output and is capable of transmitting a signal. The other type of dummy load is one used for calibration and/o

[Elecraft] How Accurate of 50-Ohm Dummy Load for 50 Watt TX Gain Calibration?

2015-03-28 Thread Phil Hystad
I have two dummy loads that might be useful for the 50-watt TX-gain calibration but neither of them are dead on with a 1:1 SWR and 50 ohms resistive load. Actually, my smaller 150 watt dummy load is closest with a range of 42 ohms on the load to about 55 ohms on the high end as I step through t