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March 30, 2017

The FCC released a Report and Order about the 630m band at


NOTE: These two bands are NOT YET OPEN for amateur use. We have to wait until a special

Notification process is set up by the FCC and the UTC. Please do not transmit yet !!

{Only Part 5 experimental stations and government stations are permitted at this time.

Major update: 15 Sep. 2017

The FCC posted the UTC registration page today. Go there and register your call sign to prepare for the opening of this band (and 2200m).

News at CQ at http://cqnewsroom.blogspot.in

My first QRPp Transmitter for 630 meters from Utah QTH

The VFO operates at 3.8 MHz. It is fed into a divide-by-eight counter (CD4024) to put out RF at 467-482 kHz. This signal is then routed thru a potentiometer to the IRF510 FET class D amplifier that currently is capable of 2 watts output.


This is the unit I was using to generate the 2 WSPR 

reception reports shown below. It is a kit from 

John Molnar, WA3ETD. My FT100d tranceiver 

was set to 3674.2 kHz which produced a signal

from the transmitting converter of 475.7 kHz 

in the WSPR segment of the 630 meter band. 

I now use this as an exciter for my 100 watt IRF540 FET class D amplifier. I tap off of it just before the IRF510 in the photo at the left.

             Vermont is My Farthest East from Utah on 630 meters, after adding a top-load wire.
           (it was a 60' wire sloping down from the 34' spot on the vertical, to 25' at far end. Top loading a short vertical GREATLY increases its ERP)

                    Timestamp       Call            kHz       Grid          Pwr      Reporter    HisGrid    km       mi               

                    2014-01-26   WG2XSV     475.7    DN41ac  200mW   WG2XKA   FN33ir     3159  1963

                    04:58 UTC


Layton, UT to Alaska on 630 meters using WSPR-2 mode

December 29, 2013 using 50 milliwatts(ERP) to a 44 foot vertical base loaded antenna.

(no top loading had been attached yet for this decode of my 50 mW)

                    Timestamp       Call            kHz       Grid          Pwr      Reporter    HisGrid    km     mi  

                    2013-12-29    WG2XSV    475.2    DN41ac    50mW   WE2XPQ    BP51ip   3373  2096

                    10:24 UTC


Now in Vancouver Washington as of fall of 2014

Since moving to Vancouver Washington I have put my experimental station back on the air. I have an FET class D amplifier that puts out around100 watts into a 40 ft top loaded vertical antenna. This results in an effective radiated power (ERP) of about 1 watt (+/- 1 dB). My WSPR beacon from my new QTH has been copied as far as AK, HI, TX, PA, MD, VT, CT, TN, GA and by many more states in between.

UPDATE July 2017:

I extended my MFJ2990 telescoping vertical to 44.5 ft. No change to top load wires except for slight change in the angle between them and the vertical portion, which is now about 40 degrees)

The diagram below shows how I tune my vertical on 475 kHz. 

                Here is an EZNEC sketch of my Top Loaded 630m Vertical Antenna (now 44.5')

Check out my ANTENNA page for more.....

Here is a WSPR map of my best coverage in several directions with ~1 watt ERP on one night in February 2015 from my new QTH in Vancouver, Washington

See more about my 600 meter experiments on my WG2XSV page on my OTHER HAM RADIO website at http://w0yse.webs.com

and about how to calculate EIRP and Rr (Radiation Resistance) and much more...