Re: [Drakelist] 60 meter 50 watt equivalent from a dipole
On Sun, 2011-04-03 at 11:10 -0500, Jim Shorney wrote: > http://dictionary.reference.com/browse/tweak > > "3. to make a minor adjustment to: to tweak a computer program. > noun > 4. an act or instance of tweaking; a sharp, twisting pull or jerk." very good all I stand corrected. Seems that all these years, whether in a electronic class or instruction, we were told to "tweak" an adjustment for the desired effect. In other words, fine tune a circuit for maximum, efficient or best effect. Thus I found it difficult to accept that "tweak" also applies to "detuning" or reverse effect (in this case regarding the 60 mtr thread). But that's me. 73 Ron, wb1hga ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 60 meter 50 watt equivalent from a dipole
On Sat, 02 Apr 2011 20:58:44 -0400, roncasa wrote: >I always understood "tweaking" to mean maximize or peak; >Did you mean "detune" or something to that effect? http://dictionary.reference.com/browse/tweak "3. to make a minor adjustment to: to tweak a computer program. noun 4. an act or instance of tweaking; a sharp, twisting pull or jerk." 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 60 meter 50 watt equivalent from a dipole
- Original Message - From: "Kris Merschrod" To: "'Drake List'" Sent: Saturday, April 02, 2011 7:36 PM Subject: [Drakelist] 60 meter 50 watt equivalent from a dipole Basically the FCC (I do not have the quote handy) said that the limit would be the equivalent of 50 watts applied to a dipole. So, in practice, some have tweaked their power into the transmission line taking into consideration the loss of the transmission going to the dipole. Some have also tweaked the input power according to the relative gain of the actual antenna - those with a vertical or mobile increase the input power, those hams with loops, cut back. It is nice ham techie tweaking - not mysterious at all. The topic involves reducing signal gain to FCC requirements on 60 mtrs. I always understood "tweaking" to mean maximize or peak; Did you mean "detune" or something to that effect? 72 Ron, wb1hga ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] 60 meter 50 watt equivalent from a dipole
Basically the FCC (I do not have the quote handy) said that the limit would be the equivalent of 50 watts applied to a dipole. So, in practice, some have tweaked their power into the transmission line taking into consideration the loss of the transmission going to the dipole. Some have also tweaked the input power according to the relative gain of the actual antenna - those with a vertical or mobile increase the input power, those hams with loops, cut back. It is nice ham techie tweaking - not mysterious at all. Kris KM2KM Merschrod 123 Warren Road Ithaca, NY 14850 www.merschrod.net - Original Message - From: "Richard Knoppow" <1oldle...@ix.netcom.com> To: "Bob Spooner" ; "'Charles Ring'" ; "'Al'" Cc: "'Lou Ribble'" ; "'Drake List'" Sent: Saturday, April 02, 2011 7:04 PM Subject: Re: [Drakelist] TR-M - Original Message - From: "Bob Spooner" To: "'Charles Ring'" ; "'Al'" Cc: "'Lou Ribble'" ; "'Drake List'" Sent: Saturday, April 02, 2011 10:53 AM Subject: Re: [Drakelist] TR-M The information I found on the TR-M says that it has transmitting gain control. It may be possible to apply a DC voltage to that to keep the output power down to 50 Watts for 60 Meters. 73, Bob AD3K Since the FCC spec is for ERP I wonder how that is calculated. The input to the antenna is not ERP. My understanding is ERP is the power that would be equivalent to what would have to go into a theoretical unipolar antenna. Such antennas are impossible in the practical world but are useful for calculating antenna gain. Even a simple dipole or vertical antenna has gain over a unipole, the difference may not be of more than academic interest but where regulations are concerned it would be worth knowing. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
