[Elecraft] 630 meter band open for use

[Edward R Cole]

Bill,

I could not believe it when you stated all modes allowed, so I 
checked the CFR47, 90.307
https://ecfr.io/Title-47/se47.5.97_1305

  630m allows RTTY, data (see 97.307 (3)

  630m phone and image (see 97.307 (1)(2)

But seriously no 3-KHz phone should be used since one QSO would 
occupy nearly 50% of the 7-KHz wide band.  I'm astonished that the 
FCC permits phone on 630m.
CW and digital is most efficient use of spectrum and weak signals.

97.313
https://www.ecfr.gov/cgi-bin/text-idx?SID=2689706e634fb3e73b9f4ef814c352e9&mc=true&node=se47.5.97_1313&rgn=div8

(l) No station may transmit in the 472-479 kHz (630 m) band with a 
transmitter power exceeding 500 W PEP or a radiated power exceeding 5 
W EIRP, except that in Alaska, stations located within 800 kilometers 
of the Russian Federation may not transmit with a radiated power 
exceeding 1 W EIRP.

So this observes that 630m transmitting antenna are expected to be 
very inefficient 500w resulting in < 5w erp.  My inverted-L 
calculates to be 3w erp with 100w.

So Mel +20 dBm (100mw) will result in about 3mw erp using my 
antenna.  Of course you may put up a full size vertical 521 foot high 
(with 521 foot ground plane) or a 1142 foot dipole only 1000-foot 
high.  Most of us will use antenna under 10% full size with resulting 
dismal efficiency.

But 5w erp can go a long distance on 630m; my signal was detected in 
Buffalo, NY (about 4,000 miles).

73, Ed - KL7UW, WD2XSH/45 (ARRL Experimental License)
---------------

To: Bill Frantz <frantz at pwpconsult.com>,
Subject: Re: [Elecraft] 630 meter band open for use


Interesting in reading the FCC notice, ALL modes are allowed!!! ?So 
some enterprising company should make a transverter for us??????? ?It 
is only allowing 5W EIRP, a signal generator and do +20 dBm, Hummmmmmm.
Mel, K6KBE

       From: Bill Frantz <frantz at pwpconsult.com>
  To: elecraft at mailman.qth.net
  Sent: Friday, September 15, 2017 4:02 PM
  Subject: Re: [Elecraft] 630 meter band open for use

Just submitted my data for both bands. I got the lat/long from
QRZ.com and checked it against the "Maidenhead" app on my cell phone.

73 Bill AE6JV


73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com