is it possible to use an SSTRAN AMT3K with a coupler for carrier current am?
Hello ABMedia1:
The AMT3000 does not match with a carrier current coupler, because the transmitter does not have a 50-ohm output.
The carrier current couplers need transmitters with a 50-ohms output.
There is an important reason why the AMT3000 does not have a 50-ohms output.
The AMT3000 is designed to match into an electrically short antenna (3-meters), which would not work so well with a 50-ohm output.
But there is a way to accomplish carrier current with an AMT3000, and that is to add a linear RF amplifier with a 50-ohm output. The linear amplifier would also serve to boost the power to 1-Watt or more for even better coupling into carrier current.
Trouble is, there are no ideal medium wave linear amps on the market, but there are schematics and published designs for building one.
you can set the AMT3000 for 50 ohm output. details are in manual.
I don't remember that being in the manual. I do remember Mr. SStran telling me via email how to do it.
I posted in another thread about the possibilty of Phil B. making a shortwave version of his kit.
Not long ago a group of top engineers on the part15.us website, including PhilB, participated in designing a shortwave transmitter for Part 15 use.
The project was named "Big Talker" and the results are available for home building.
There are two buffer amplifier designs, one by PhilB and the other by Radio8Z, take your pick.
http://www.kdxradio.com/bigtalker.html