Re: [digitalradio] RE: Re: Too much power
...'tis true...Jay N3DQU Date: Sun, 26 Jun 2005 09:02:08 -0500 From: Rick Williams [EMAIL PROTECTED] Subject: RE: RE: Re: Too much power Like most things in amateur radio, it is whatever interests the operator and what they find useful and fun to do. The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ More info at http:///www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [digitalradio] RE: Re: Too much power and courteous notifiication - how/if
Yep, I agree with Jose. Problems with signal width, noise and splatter aren't usually due to operating high power, but rather because the audio input to the rig is being overdriven from the soundcard. Until someone comes up with an easy way to monitor the rf output at the sending station, this will always be a problem with the soundcard modes. If a high power signal is properly driven, the only thing it will do is blank out your waterfall, assuming the front end of your rig can handle the signal that is...73 de Jay N3DQU Message: 2 Date: Sat, 25 Jun 2005 03:28:49 -0700 (PDT) From: Jose Amador [EMAIL PROTECTED] Subject: RE: Re: Too much power and courteous notifiication - how/if I think it is a matter of signal cleanlinessuse the lowest power that allows the communication, with a clean signal. In PSK, as well as in SSB voice, and many digital modes with an envelope (I am not referring to constant envelope modes as RTTY) a clean signal is a must to conserve bandwidth. It is not a matter of power only. If you must make the contact, switch on your amplifier and run it at LOW POWER, that is, low enough to have a powerful but CLEAN signal with low IMD. Nevertheless, the audio from your TNC or soundcard shall never overload your transceiver input. Linearity shall be mantained from the signal source up to the antenna, no matter if you run milliwatts or full legal power. Happy QSOs, 73 de Jose, CO2JA The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ More info at http:///www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [digitalradio] RE: Re: Too much power
Something to consider is that if many radio amateurs are using low power or medium power and you chose to use much higher power, while it may be possible for them to print you, you will likely not be able to print them and the QSO will not be able to continue if signals are that marginal. I can see one possible use of an amplifier and that is when a ham has a very poor transmitting antenna system due to perhaps local restrictions. They can copy other stations OK but they have a difficult time being heard. Human nature would suggest that if it is found by many, that they can get much better results by running higher power (but clean)signals, then things will gravitate in that direction. Like most things in amateur radio, it is whatever interests the operator and what they find useful and fun to do. 73, Rick, KV9U -Original Message- From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Jay Budzowski Sent: Sunday, June 26, 2005 08:32 To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] RE: Re: Too much power and courteous notifiication - how/if Yep, I agree with Jose. Problems with signal width, noise and splatter aren't usually due to operating high power, but rather because the audio input to the rig is being overdriven from the soundcard. Until someone comes up with an easy way to monitor the rf output at the sending station, this will always be a problem with the soundcard modes. If a high power signal is properly driven, the only thing it will do is blank out your waterfall, assuming the front end of your rig can handle the signal that is...73 de Jay N3DQU -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.8.1/28 - Release Date: 6/24/2005 The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ More info at http:///www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [digitalradio] RE: Re: Too much power
--- Rick Williams [EMAIL PROTECTED] wrote: Something to consider is that if many radio amateurs are using low power or medium power and you chose to use much higher power, while it may be possible for them to print you, you will likely not be able to print them and the QSO will not be able to continue if signals are that marginal. A very old adage from Jeeves: You´ve gotta hear´em to work´em. Undeniable truth. It is certainly better to spend on antennas than on amplifiers, it gives better results and generally less RFI. I can see one possible use of an amplifier and that is when a ham has a very poor transmitting antenna system due to perhaps local restrictions. They can copy other stations OK but they have a difficult time being heard. It generates a poor transmission...and reception, too. I forgot to mention a gadget from MFJ I saw some time ago: a series tuned ground for apartment dwellers. Having the chasis of your radio hot with RF surely is a call for trouble. Get one or make a copy, but the metal case of your radio better be at zero RF potential. Human nature would suggest that if it is found by many, that they can get much better results by running higher power (but clean)signals, then things will gravitate in that direction. Like most things in amateur radio, it is whatever interests the operator and what they find useful and fun to do. I personally find broad signals the worse between those two evils. 73 de Jose, CO2JA __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/ More info at http:///www.obriensweb.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
