Are there any companies or people making/selling an antenna tuner with SWR and power meters than will cover the range of at least 135KHz to 1MHZ or even just to 500KHz? Are there any that don't need their own power supply? Are there some good websites for information on making my own? Thanks, 73, AF5IE
The Wavenode WN-2 with a L/M1 sensor will give you 100kHz to 5mH. A little pricy, but that hasn't kept it off my wish list. https://wavenodedevelop.com/controllers/wavenode-wn-2/ Good luck! 73 Jim, WQ2H
Typo. Must have had inductance on the brain. The Wavenode WN-2 with a L/M1 sensor will give you 100kHz to 5mHz. 73 Jim, WQ2H P.S. - My variometer is variable from 3.34 to 3.75 mH (calculated @ 136.5 kHz) - if that counts !
2H: Methinks you are in need of a few cups of coffee! At 5 mHz the sine wave is going to take 33.333-seconds to go through a full cycle! I believe that you really mean 5 MHz! Glen, K9STH
I don't know what I'd do without you guys..... Hopefully George has got the idea by now !! The Wavenode WN-2 with a L/M1 sensor will give you 100kHz to 5MHz. 73 Jim, WQ2H
What type of antenna do you need to match? Most MF antennas are of the monopole type, and usually need only a series inductor and in exceptional cases also a matching autotransformer. The power/SWR sensor frequency response is governed by the number of turns and core material in the bridge coupling transformers. If the schematics of a 500 kHz marine reserve transmitter or a NDB beacon transmitter are studied, many useful ideas can be gathered. 73/ Karl-Arne SM0AOM
