🚀 go-pugleaf

In article <IVImuXy00Uo5Q7c0jH@andrew.cmu.edu>, sr16+@andrew.cmu.edu (Seth Benjamin Rothenberg) writes:
 
 > I am trying to build a circuit ..., but
 > I am not sure it is legal now.  It uses 'i-f transformers' to transmit
 > an audio signal over an AC line at 400KHz.  The Radio Shack
 > salesman near me said that the FCC now allows only 46-49Mega Hz
 > for this type of stuff.  Is this true? 

Carrier current transmission, if done in compliance with FCC regulations
is still legal.   Here is a partial list of wireless intercoms and their
transmission frequencies (in MHz).  Several of these models are in
production now:

intercom, wireless, Allied Knight-Kit
		       [KG-225]____________    0.1360____-
	      "		 "		       0.2150____-
intercom, wireless, Heathkit, fm
		       [GD-1114]___________    0.2820____-
intercom, wireless, Lafayette, fm
		       [FM-50]_____________    0.1600____ch C
	      "		 "		       0.2000____ch B
	      "		 "		       0.2400____ch A
intercom, wireless, Radio Shack, power 50 mw, fm
		       [43-212A]___________    0.1600____ch B
	      "		 "		       0.2000____ch A
	      "		 "		       0.2300____ch C
	      "	       [43-214]____________    0.1600____ch B
	      "		 "		       0.2000____ch A
	      "	       [43-218]____________    0.1600____ch B
	      "		 "		       0.2000____ch A
	      "		 "		       0.2300____ch C
intercom, wireless, Tele-Tender, power 50 mw, fm
		       [Comm-Call 300]_____    0.2000____ch A
	      "		 "		       0.2300____ch B
	      "		 "		       0.2600____ch C

-- 
===-===-===-===-===-===-===-===-===-===-===-===-===-===-===-===-===-===-===-===
Bob Parnass,  Bell Telephone Laboratories - ihnp4!ihuxz!parnass - (312)979-5414