1. Introduction to the DMX-40 Morse Code Decoder & Converter Transceiver 

We do have exactly what you are looking for, introduced on March 12, 13 at the QSO Today Virtual Ham Expo. It is the MMX Multi-Band Morse Code Transceiver. It has 3 slots for band plug-ins. You can order one, two, or 3 bands, choosing currently from 80, 40, and 20 meters. check it out: www.preppcomm.com/products/dmx-40-transceiver?RU-vidQ

Not only plans, but fulfilled plans! On March 12 and 13 of this year, we introduced the MMX MultiBand Morse Code Transceiver! It has all of the bells and whistles of the DMX-40, a better (lower noise) power supply, and three "slots" for plug-in band PCB's. We currently support 80, 40, and 20 meters. Check it out! www.preppcomm.com/products/dmx-40-transceiver?RU-vidQ

PS/2 compatible, USB plug

A 5W dummy load is fine, and you can get one from Amazon for around $7. No, it does not come with one. We are fighting the rapid increase in parts cost (up to 40% in some cases), so little extras are out of the question at this time as we hold our price. I don’t think you need ferrites, but if you do, putting one on the keyboard cable is OK. We have internal filters, but if you run your keyboard wire next to the antenna wire, you are going to have trouble. It is not “bleeding out badly” but it is RF off of the antenna wire - depending on your load, you may have a lot, or a little. It’s just good practice to not run RF power and low power digital together due to capacitive coupling. I would not worry about this - it is information blown out of proportion by whoever. Follow good practice and you should be fine. Another good practice - don’t have the keyboard wire running all over the place. Bundle it up so it is neat and tidy, and the connection between keyboard and DMX-40 is short. Otherwise, you are just adding an antenna between the keyboard and the DMX-40, and if you have RF in your shack, it will pick it up, and maybe even overload our built-in RF filters. SO, the word is, follow good engineering practice, and you should not have any problems at all. We offer these tips because many hams have no idea with good engineering practice is. We are not offering this information because there is something wrong with the DMX-40.

Contact the factory for help, or access the PreppComm Community at preppcomm.mn.co.

It's price range is $349 to $349... check out our website at PreppComm.com

Why did you use such a non standard, as far as Amateur Radio goes, antenna jack? Seems like a BNC should have been the logical choice. Other than that it looks interesting. 73 de KF7VUT

@@timk7749 The SMA connector comes with a PCB edge connector. I don't know of a PCB edge connector for BNC. Of course you can get a BNC to SMA adaptor and keep it attached.

@@timk7749 And BTW, it is quite standard on VHF/UHF.

Touch the frequency button on the screen.

it shows "External" rather than a frequency in the Frequency Button on the Main Screen.