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#13
June 5th 08, 08:08 PM
posted to rec.radio.amateur.antenna
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What effect does a tuner have at the antenna?
"David G. Nagel" wrote in message ... wrote: For more grins, what do you think the "LOAD" and "TUNE" knobs on an older tube transmitter are? They match the output power tube impedance to the antenna system impedance. If you don't believe me mistune a tube transmitter and feel the warmth come from the finals. Have a spare in stock for when you are done. Dave WD9BDZ I think I am trying to say the same thing. One has to define where the matching system of the final amplifier stops and the antenna system starts. I look at an antenna tuner that is within a few feet of the transmitter as an extention of the matching network between the amplifier device (tube or transistor) and the load which starts with the transmission line. If the antenna tuner is actually at the antenna, then it is a matching device for the antenna and not in the scope of this discussion. Is the automatic internal antenna tuner such as in my Icom746 pro really an antenna tuner or is it just taking the place of some knobs that I could turn such as in a Heathkit sb100 ? All that is being done in either case is to match the amplifing device to whatever load is put to it. I thnk it is just a mater of what someone wants to call it at the time. |
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