With the laws now reading that 1500w PEP OUTPUT is the power limit, regardless of mode, why not run 1500w Output of FM, at +/-5kc? ;-)
Narrow band FM has always been allowed.. I take this to be 3 or 6 kc. The wider band stuff is for above 29 mcs. I guess my old rule book is out of dade, the original question was about amplitude modulating an oscillator. It was earlier strictly forbidden. Looks like a rewirte has changed it to good enginnering practice! Ask Mr Zack Lau, simply " Is it good enginering practice to modulatate an oscillator for AM". If you really wanna do it then there is a dandy 6V6, 813 rig in the RCA tube handbook for 1942 using a single modulated B+source for all HV functions and the 6V6 tube drop for the screen supply. This will give you the TimTron Crappy SBE signal you desire.. Again 73 and MERRY CHRISTMAS to all like minded Belivers.. Mike K4XM Original Message ----- From: "Geoff/W5OMR" <[EMAIL PROTECTED]> To: "Discussion of AM Radio" <[email protected]> Sent: Thursday, December 23, 2004 3:18 AM Subject: Re: [AMRadio] Lowest level modulation > > ----- Original Message ----- > From: "Mike Dorworth, K4XM" <[EMAIL PROTECTED]> > To: "Discussion of AM Radio" <[email protected]> > Sent: Wednesday, December 22, 2004 8:00 PM > Subject: Re: [AMRadio] Lowest level modulation > > > > Hi , it is illegal to use a modulated oscillator below about 2 meters. It > > will work but adds FM even to a crystal oscillator. In fact commercial vhf > > equipment using crystals actually phase modulate the crystal oscillator to > > get FM. They of course go through several multiplications to get the plus > > and minus 5 kc deviation.. That's kHz for youngsters!.. The rules simply > > state NO!..hope this helps.. Mike K4XM > > You might want to check again, Mike... > > 10m FM is pretty popular. > > As I recall, the rules state that FM is allowed on HF as long as it's no wider > than a conventional AM signal. > > That said, if these modern day rice-boxes have FM on 'em, I wonder how > difficult it would be to check the deviation and modulation index on said > rigs, to keep 'em down to 2.5kc of deviation? > > With the laws now reading that 1500w PEP OUTPUT is the power limit, > regardless of mode, why not run 1500w Output of FM, at +/-5kc? ;-) > > 73 = Best Regards, > -Geoff/W5OMR > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.298 / Virus Database: 265.6.4 - Release Date: 12/22/2004 > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.4 - Release Date: 12/22/2004
