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Well, 5 volts is a little higher than I would apply to a precision
attenuator (E squared /R = W) = 1/2 watt, which is a little tough on that input quarter watt resistor. First, terminate the output in 50 ohms. Then the input will read 50 ohms at any setting. If it doesn't, you've got problems. Otherwise, yes, 1 volt in, and calculate the output voltage (across 50 ohms!) for each dB step. Personally, I use a network analyzer at the top rated frequency of the attenuator and let the cal lab keep it calibrated. -- Crazy George Remove N O and S P A M imbedded in return address "Ken" wrote in message ... On Fri, 26 Mar 2004 01:02:41 GMT, "Harold E. Johnson" The 355's are a piece of cake. You can do it with DC and a voltmeter. Hmmm. I tried it with an ohmmeter and didn't get what I expected. Resistance increased to around 100 ohms and stayed there from around 60 dB up. So, if I put 5VDC across one center pin and ground, I should be reading voltages to ground at the other pin that correspond to the dB setting on the dial? Ken KC2JDY Ken (to reply via email remove "zz" from address) |
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