Mfj-939a tuner

[radiomancanada]

Can I plug a ladder line or wires in this tuner in the back there is only two coax plugs

 

[ka3jjz]

It doesn't look like it, no. Note that this is really an autotuner, and requires a transmitter to tune it properly. If you aren't transmitting (and in this forum, that's the assumption), this isn't what you are looking for. However these are a much better bet, and a heckuva lot less expensive too...

https://steadynet.com/emtech/

As long as you're not interested tuning below 3 Mhz or so, you should be in good shape. They say they're out of stock, tho - you might want to contact them to see when they're expected to be available

Point being, you really don't need a USD300 tuner for receiving...

Mike

 

[ka3jjz]

In fact you likely won't need a tuner at all - a balun will do the job nicely. The word 'balun' is actually a contraction of sorts - it means 'BALanced' to 'UNbalanced'. Here's an example of a supplier...

https://packetradio.com/catalog/index.php?main_page=index&cPath=11&zenid=e27fmu457fsvrde77uv2v77kh0

Now you need to know (roughly) the impedance of your ladder line. Many are 450 ohms, so a 9:1 balun will work (50 ohm x 9 = 450). You can dig around the net for others - the above is only an example. Again,power level handling on receive applications is of absolutely no consequence - you don't need to overbuy. A low power balun will do just fine. And it's a heckuva lot cheaper than a Mighty Fine Junk tuner.

Mike