Re: [Repeater-Builder] How much gain or how much loss on the PD220-3A
Yup-that was me! I got that info from my dad actually back in the 70's, not long after he left New-Tronics. Here's the link to the article on RB: http://www.repeater-builder.com/antenna/retuning-a-stationmaster.html Let me know on here if there's any questions! (The netscape addy is no good anymore, btw.) On 5/19/2010 11:47 PM, Doug Bade wrote: Someone ( WD8CHL JIM ) wrote some documentation up about using a Co-linear from a higher freq on a lower freq... and angle of radiation lowered as I recall but gain did not change... It actually can be favorable depending on the site as I recall.. I think it was Jim anyhow.. forgive me if I offered a wrong author :-)...who penned some information on moving commercial colinear to amateur and some sleeving was needed bring the feed point back to 50 ohms... but no other mods were done that I recall... Doug KD8B WA3GIN wrote: Hi folks, I'm curious about this question of operating the Station Master 10Mhz off resonant frequency. The antenna seems to be working fine from observed performance but that could just be the 425ft ASL in an area where average elevation is 30ftASL. I've searched the WEB but haven't yet found a reference that would ascertain the performance of the antenna. Should I presume unity gain on 146. from an antenna with 5db gain at 156.Mhz? Thoughts welcome, dave wa3gin Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] How much gain or how much loss on the PD220-3A
At 5/21/2010 12:16, you wrote: Yup-that was me! I got that info from my dad actually back in the 70's, not long after he left New-Tronics. Here's the link to the article on RB: http://www.repeater-builder.com/antenna/retuning-a-stationmaster.html I did this mod. to a UHF StationMaster a few years ago. Worked very well though the actual gain is a couple of dB off from a GP9, as you'd expect since it's about 5 ft. shorter than a GP9. Bob NO6B
Re: [Repeater-Builder] How much gain or how much loss on the PD220-3A
Someone ( WD8CHL JIM ) wrote some documentation up about using a Co-linear from a higher freq on a lower freq... and angle of radiation lowered as I recall but gain did not change... It actually can be favorable depending on the site as I recall.. I think it was Jim anyhow.. forgive me if I offered a wrong author :-)...who penned some information on moving commercial colinear to amateur and some sleeving was needed bring the feed point back to 50 ohms... but no other mods were done that I recall... Doug KD8B WA3GIN wrote: Hi folks, I'm curious about this question of operating the Station Master 10Mhz off resonant frequency. The antenna seems to be working fine from observed performance but that could just be the 425ft ASL in an area where average elevation is 30ftASL. I've searched the WEB but haven't yet found a reference that would ascertain the performance of the antenna. Should I presume unity gain on 146. from an antenna with 5db gain at 156.Mhz? Thoughts welcome, dave wa3gin Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
