NEW 2 Bands in USA: 630meters (472-479 kHz) and 2200 meters (135.7-137.8 kHz )

Maybe this is supposed to be like Ham Radio and you are expected to build some of it?

 

They did, but fortunately the ones removed were not in Part 97 ;-)

 

People should do some reading on the subject before spouting off revealing their ignorance. So you need a turn-key radio system from Gigaparts(no commercial relationship, just an example) before you can operate Ham Radio? You do realize it might take a KW to achieve 5W IERP on these bands? Since most all antennas on these bands are compromise antennas(limit 197 feet high), there is some form of MF/LF antenna for most situations. Try using WSPR and listen to these frequencies even on a wire or 40M antenna. A watt can go a long way when properly applied.

"He who stops being better stops being good." - Oliver Cromwell

 

A turn key system would be great.

Yep.

Sure enough.

 

Dig out your favorite 6CL6 schematic. With bigger coils, these should work nice on 630M.
https://www.google.com/search?q=sla...AhWlAcAKHfxBCJYQsAQIQg&biw=1344&bih=725#spf=1

 

Cool idea!!!!!!!!!!!

 

Be sure to read this part....you should expect PLC's to be ubiquitous on the grid in coming years. Some--not all--will be on those bands. The suggestion is a good one: get on early and register.

• The FCC is requiring a 1-kilometer separation distance between radio amateurs using the two new bands and electric power transmission lines with PLC systems on those bands. Amateur Radio operators will have to notify the UTC of station location prior to commencing operations.The FCC Wireless Telecommunications Bureau will provide details on the notification process later, but ARRL is urging radio amateurs interested in operating on either band to register at the earliest opportunity, to avoid having to protect any “post-notification” PLCs.

 

Good luck getting crystals

 

Don't forget a decent LPF following your 6L6, 807 etc! The second harmonic of the
proposed 630m band falls within the AM broadcast band ...
CU on the new band!
-WA3ETD

 

...WW2 surplus crystals are, well were, available from an Eb*y vendor some time
ago. Some may be kicking around.
-WA3ETD

 

International Crystal closed too early...

 

These bands will potentially have the irony of favoring those in high rise buildings.

Your assumption that 'ground is ground' will be wrong: any connection of an artificial raised ground (pipes, for example) will make it part of the antenna, a radiating part. So if you live on the 20th floor, you will have an interesting, shortened OCF dipole. The building materials, of course, will be an issue.

 

W1YW, I hope that you and others are not completely overlooking other types of antenna structures that have been found to work well down there and do not rely, nor need, any type of "ground", antennas such as the tuned-loop type antenna.

In the really old days, they referred to these loops as "closed-frame antennas" versus "open-frame antennas" like verticals and dipoles where the "circuit" of the antenna does not appear to be 'closed'.

Below is the antenna I use on 160 meters, and with a change in tuning network, the antenna I use on 630 meters. The wire is 120 feet circumference and the whole arrangement including 3/16" Dacron guy lines fits in a city-lot sized back yard:




Here are the results I obtain on 630 meters with 5 W going into the antenna and giving 50 to 100 mW ERP:

 

I am well familiar with all those 'types' of antennas, and I applaude you for sharing your design for others here.

All antennas are real or virtual closed circuit in their 'equivalent circuits', as you well know.

Antennas are RLC filters that radiate.

73
Chip W1YW

 

Always with the negative waves Moriarty, ALWAYS with the negative waves!