Re: [Repeater-Builder] Re: 4-bay dipole array harness lengths
Cut 'em for the longer length and try it. If it works with good VSWR, you're done. If not, cut it shorter and re-connect the connectors and measure the VSWR again. Then report back so Kevin can update the info on the web page. Chuck WB2EDV - Original Message - From: "Steve" <[EMAIL PROTECTED]> To: Sent: Tuesday, September 28, 2004 7:59 PM Subject: [Repeater-Builder] Re: 4-bay dipole array harness lengths > Nope...I dug up my copy of "FM and Repeaters for the Radio Amateur" > (from where this plan came from)...it says "Lengths E and F are each > 63.8 inches long from center of T to center of T". > > The only thing I can imagine was that maybe someone was dyslexic and > it's supposed to be 68.3" rather than 63.8"...that would put it close > to 145 Mhz... > > Steve, KE4MOB > > --- In Repeater-Builder@yahoogroups.com, Paul Guello <[EMAIL PROTECTED]> > wrote: > > Steve, > > If you use .66 for the velocity factor of RG-11 and > > 147 MHz then it comes out to 66.25" which is within > > 2.5" of the text. I've found that on these harnesses, > > the length is so critical that the connectors must > > also be included in the total. I'd bet that this > > accounts for the difference in the calculation. The > > length shown in the article assumes the additional > > length of the connectors. > > Paul, KB9WLC > > > > --- Steve <[EMAIL PROTECTED]> wrote: > > > > > > > > I'm thinking about building this: > > > > > > > > http://www.repeater-builder.com/rbtip/exposeddipole.html > > > > > > However, I'm having trouble reproducing the > > > calculation that yields a > > > 63.8 inch coax length. I'm assuming the velocity > > > factor is .67 and > > > keep getting 68 inches for a 5/4 wave...off from > > > 63.8 inches as in > > > the article. I can reproduce the 40.8 inch > > > dimension (3/4 wave) > > > within a fraction of an inch > > > > > > I'm using L = 246/F*Vf for a quarter wavelength > > > (about 13.5 inches). > > > > > > What am I missing? I'd like to understand where the > > > numbers come > > > from before I start cutting aluminum and coax > > > > > > Steve, KE4MOB > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > > __ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam protection around > > http://mail.yahoo.com > > > > > > > Yahoo! Groups Links > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
mch wrote: >If you're low and slow below 200', you had better be near an airport or >heliport or you're most likely in violation of FAA rules anyway. ;-> > > Heh heh. Very true, very true... 1000' AGL above populated areas. But... as the joke goes... There are those who've had engine failures, and those who will. And of course, *no* pilot has ever gotten lost! (Gasp!) Sorry, getting OT for this group. ;-) Just makin' sure all us radio-heads realize there's a good solid safety-related reason for all these "silly" tower lighting/painting rules! Thanks for listening. Nate WY0X Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] duplicate posts
Me too -Original Message- From: Q [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 18:56 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] duplicate posts Is everyone getting multiple messages from Yahoogroups or is it just me? Yahoo! Groups Links The information contained in this E-mail message is privileged, confidential, and may be protected from disclosure; please be aware that any other use, printing, copying, disclosure or dissemination of this communication may be subject to legal restriction or sanction. If you think that you have received this E-mail message in error, please reply to the sender. This E-mail message and any attachments have been scanned for viruses and are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened. However, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by Tri-State Emergency Communications - REACT, Its Subsidiaries or Affiliates for any loss or damage arising in any way from its use. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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/
[Repeater-Builder] Re: 4-bay dipole array harness lengths
No, authored by the ARRL HQ staff. Copyright 1972cost a whopping $3.00 back then... Steve, KE4MOB --- In Repeater-Builder@yahoogroups.com, Neil McKie <[EMAIL PROTECTED]> wrote: > > Is that the book written by Bill Pasternak, WA6ITF and > Mike Morris, WA6ILQ? > > Neil - WA6KLA > > Steve wrote: > > > > Nope...I dug up my copy of "FM and Repeaters for the Radio Amateur" > > (from where this plan came from)...it says "Lengths E and F are each > > 63.8 inches long from center of T to center of T". > > > > The only thing I can imagine was that maybe someone was dyslexic and > > it's supposed to be 68.3" rather than 63.8"...that would put it close > > to 145 Mhz... > > > > Steve, KE4MOB > > > > --- In Repeater-Builder@yahoogroups.com, Paul Guello <[EMAIL PROTECTED]> > > wrote: > > > Steve, > > > If you use .66 for the velocity factor of RG-11 and > > > 147 MHz then it comes out to 66.25" which is within > > > 2.5" of the text. I've found that on these harnesses, > > > the length is so critical that the connectors must > > > also be included in the total. I'd bet that this > > > accounts for the difference in the calculation. The > > > length shown in the article assumes the additional > > > length of the connectors. > > > Paul, KB9WLC > > > > > > --- Steve <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > I'm thinking about building this: > > > > > > > > > > > http://www.repeater-builder.com/rbtip/exposeddipole.html > > > > > > > > However, I'm having trouble reproducing the > > > > calculation that yields a > > > > 63.8 inch coax length. I'm assuming the velocity > > > > factor is .67 and > > > > keep getting 68 inches for a 5/4 wave...off from > > > > 63.8 inches as in > > > > the article. I can reproduce the 40.8 inch > > > > dimension (3/4 wave) > > > > within a fraction of an inch > > > > > > > > I'm using L = 246/F*Vf for a quarter wavelength > > > > (about 13.5 inches). > > > > > > > > What am I missing? I'd like to understand where the > > > > numbers come > > > > from before I start cutting aluminum and coax > > > > > > > > Steve, KE4MOB > > > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > __ > > > Do You Yahoo!? > > > Tired of spam? Yahoo! Mail has the best spam protection around > > > http://mail.yahoo.com > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Hello I am selling a customer a 180 foot Rohn SSV tower, it will be located 4 miles due West of one end of the West runway. The FAA would not give the total 200 feet of airspace I requested, said planes would hit it at that height so they gave me 180 feet. 20 feet, seems kinda crazy to me but that's the Government for ya! They also required that it have red lights at night as well as being painted! Speaking of which, anyone have anything to say bout the LED red mode compact beacons like Dialight sells? Paul -Original Message- From: Mark Holman [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 7:00 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Tower Painting and Lighting You can add if the area close to an Airport I believe 1 mile, also there will need to be some sort of a once every 24 hr. inspection to the strobes, and the number to the local F.A.A. facility if the strobes go out the call must be within a 30 Min. time frame. thats the fun of that tall tower. MH, CRO - Original Message - From: "mch" <[EMAIL PROTECTED]> To: Sent: Tuesday, September 28, 2004 11:05 AM Subject: Re: [Repeater-Builder] Tower Painting and Lighting > > Mr. Edgar McKinney wrote: > > > > The painting was wavered in our case cause of the tower material could > > not be painted. > > > > At each 50' and 100' are stable reds on with flash strobes for day > > use. > > If you have daytime strobes, that's the reason the paint isn't required. > You have to have the tower painted (correctly) OR use daytime strobes. > At night, you have to light it using red or night strobes. This applies > to any tower over 200' tall or close enough to an airport or heliport to > be a hazard. > > If your tower couldn't be painted, the daytime lighting was/is your only > option. Do you have any pics of the tower at night? Sounds nice. > > Joe M. > > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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/
[Repeater-Builder] Astron RM-50M-BB - battery size?
Right now I am running an external charger for my batteries and am considering switching to my internal backup feature on the RM-50M- BB. I have a 50amp breaker ready to go but have a couple of questions; 1) I may be getting a 100ah battery soon. Will the supply handle that? 2) I have not had a chance to measure it...is the supply already adjusted for handling the charging of a gell cell? 3 Hurricanes going thru your state makes you want to be prepared ;-) Thanks, Robert Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Paul Finch wrote: > > 20 feet, seems kinda crazy to me but that's the Government for ya! Yep. They probably went by the slide slope (or whatever the other side of that is called - the rise slope?) and it came out to 190 feet at that distance. > They also required that it have red lights at > night as well as being painted! Being painted has nothing to do with the night lighting. It only pertains to daytime - paint or lit. There are some that are both, but only because the owners decided it was better to light it and forget maintenance on the paint, so the paint is faded below standard. But, as long as it's lit, it doesn't matter. There certainly are cases where even below 200' the regulations apply. It's funny to see a power tower painted and lit while others on the same line, even higher in elevation, do not have to be. Same with water towers - the orange and white checkerboards are a hoot. Joe M. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
If the "glide slope" is at a height of 190 ft at a distance of 4 miles from the runway, I will put in a prayer for all the poor pilots relying on this ILS system hi hi. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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/
[Repeater-Builder] MVP Frequency Range
Hi all, what frequency range is "92" for an MVP? The highest I see in my docs is 91, which is 494-512 mc. Thanks Laryn K8TVZ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Re: 4-bay dipole array harness lengths
I was wondering, Thanks, Neil Steve wrote: > > No, authored by the ARRL HQ staff. Copyright 1972cost a > whopping $3.00 back then... > > Steve, KE4MOB > > --- In Repeater-Builder@yahoogroups.com, Neil McKie <[EMAIL PROTECTED]> > wrote: > > > > Is that the book written by Bill Pasternak, WA6ITF and > > Mike Morris, WA6ILQ? > > > > Neil - WA6KLA Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] 4-bay dipole array harness lengths
isn't it: x[ft]=234/F[MHz] Then: x[ft]*Vf? NOT 2 fourty-six/F[MHz] --- Steve <[EMAIL PROTECTED]> wrote: > > I'm thinking about building this: > > http://www.repeater-builder.com/rbtip/exposeddipole.html > > However, I'm having trouble reproducing the > calculation that yields a > 63.8 inch coax length. I'm assuming the velocity > factor is .67 and > keep getting 68 inches for a 5/4 wave...off from > 63.8 inches as in > the article. I can reproduce the 40.8 inch > dimension (3/4 wave) > within a fraction of an inch > > I'm using L = 246/F*Vf for a quarter wavelength > (about 13.5 inches). > > What am I missing? I'd like to understand where the > numbers come > from before I start cutting aluminum and coax > > Steve, KE4MOB > > > > > > > Yahoo! Groups Links > > > [EMAIL PROTECTED] > > > > > > __ Do you Yahoo!? Yahoo! Mail is new and improved - Check it out! http://promotions.yahoo.com/new_mail Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Paul Finch wrote: > Ed, > > Maybe a dumb question but what is the tower made out of that does not accept > paint? Its a Rhone self supporting but is stainless. It is also guided for extra strength. Gewts windy at the site as well as ice. The flood lights are on only when there is night time maintaince. Normal bill is bout 650 to 2000 a month. Depends if the heaters is on in the winter. Also the local electric company is one of our customers. We still get a bill but only pay 1\4 of it. Barting works. Ed > What does the electric bill run and where is this tower, I would > like to see it! I have several already, If I could find them. They in my pic box with hundred others. Have yet to plae 'em in an album. > Maybe you could take a picture one evening around dusk just > after the reds turn in and post it to the group. > > Paul > Ed Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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/
[Repeater-Builder] Re: [Repeaters] MSF-5000 programming
Thanks to alll who replied to this question. I programmed the station last night and tuned it up. It was equipped with the "internal duplexer" option. The transmit filter proved somewhat difficult to tune, even following the alignment procedure in the book and using the alignment probe. Thanks again and 73, Kevin, K9HX Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
mch wrote: > Mr. Edgar McKinney wrote: > > > > The painting was wavered in our case cause of the tower material could > > not be painted. > > > > At each 50' and 100' are stable reds on with flash strobes for day > > use. > > If you have daytime strobes, that's the reason the paint isn't required. > You have to have the tower painted (correctly) OR use daytime strobes. > At night, you have to light it using red or night strobes. This applies > to any tower over 200' tall or close enough to an airport or heliport to > be a hazard. > > If your tower couldn't be painted, the daytime lighting was/is your only > option. Do you have any pics of the tower at night? Sounds nice. > > Joe M. Thats right. All lighting - strobes - are reduntant so it gives the maintainence guys to get there to replace them. Ed Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] 4-bay dipole array harness lengths
Nope. 234 would be used to calculate half of a dipole or perhaps the radiator for a ground plane. That's because these antennas don't resonate on the desired frequency when cut to a free space half or quarter wavelength. I'll leave the *reason* for that to someone else, as I haven't thought about that stuff for a long time. To calculate a free space wavelength it's 984/f (492 for half wavelength, 246 for quarter wavelength). Then the VF needs to be taken into account. These are the correct numbers for calculating coax lengths. Paul On Wednesday 29 September 2004 03:07 am, Benjamin Naber wrote: > isn't it: > > x[ft]=234/F[MHz] Then: x[ft]*Vf? > > > NOT 2 fourty-six/F[MHz] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Tony leveled wrote: > > If the "glide slope" is at a height of 190 ft at a distance of 4 miles from > the runway, I will put in a prayer for all the poor pilots relying on this > ILS system hi hi. Standard ILS glideslope is 3 degrees, but they vary. That angle is from the ILS transmitter which is usually at or near the Runway Touch Down Zone and not at the runway threshold, but that varies also. 200' probably put your tower just inside the LOW side of the glideslope protection "funnel" (funnel would include the left/right indications of the ILS also of course). Venturing beyond the protection of the ILS low-side indications on an approach puts pilots beyond the point where they should only venture if they like hitting things. But there are crazy bastards who'll attempt to level off and "fly back onto the glideslope from below" out there... they all have death-wishes, or an innate inability to admit they screwed up and execute and immediate climb and missed-approach procedures. There are also so-called "non-precision" approaches which typically step the pilot down using the pressure altimeter and some non-precision directional information such as a Non-Directional Beacon (NDB) or GPS coordinates, etc... you usually end up somewhere between 200' and 500' AGL lollygagging around out near the approach end of the runway somewhere, looking ahead for any signs of something that looks like an airport. Non-precision approaches attempt to get the aircraft down to the final altitude 3-5 nautical miles from the runway environment to give the pilot of a 200 knot aircraft a little bit longer to look out the window for signs of an airport out there in the clouds... 4 miles isn't that far when you're doing 3 miles a minute! Even at a more common speed of 120 knots, that's still 2 nautical miles a minute. 5 nm out at 120 knots gives you 2.5 minutes to play "Where's Waldo" with the airport in a fog bank. Nautical miles are 6080' for those interested... so your 4 statute miles is less than that in terms of nautical miles, which is what pilots work in. 3.4 nautical miles to be exact. Most missed approach points for precision approaches like ILS are somewhere before the runway. Many non-precision approach missed approach points are in the center of the runway environment and many are based on speed and a stopwatch, if the navigation transmitter isn't on the airfield. And now I've bored you all to death with just the tip of the iceberg when it comes to instrument flying... and I've probably screwed some of it up, but it gives the flavor from the other side of the cockpit glass/plexiglass. To be fair to us radio folks, I've seen FAA drop non-precision approaches to an airport entirely after the construction of a tower nearby -- they sometimes determine the tower is more useful than the non-precision instrument approach. It's a tough juggling act they have. Keep those towers lit and painted!!! AND THANK YOU!!! We folks in our gas-powered flying bugsmashers appreciate it greatly when the WX goes down the tubes unexpectedly! (GRIN) Nate WY0X Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] duplicate posts
I am getting 3 copies of each post as well. Ted -Original Message- From: Joe Pedulla [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 8:29 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] duplicate posts Me too -Original Message- From: Q [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 18:56 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] duplicate posts Is everyone getting multiple messages from Yahoogroups or is it just me? Yahoo! Groups Links The information contained in this E-mail message is privileged, confidential, and may be protected from disclosure; please be aware that any other use, printing, copying, disclosure or dissemination of this communication may be subject to legal restriction or sanction. If you think that you have received this E-mail message in error, please reply to the sender. This E-mail message and any attachments have been scanned for viruses and are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened. However, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by Tri-State Emergency Communications - REACT, Its Subsidiaries or Affiliates for any loss or damage arising in any way from its use. Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] duplicate posts
On Wed, 29 Sep 2004 08:00:08 -0400, Ted Leonard wrote: >I am getting 3 copies of each post as well. Just one copy of each message here. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Digest Number 2727
Yep! That is probably "way" outside the "protected zone"!! Tom/W4OKW ---snip If the "glide slope" is at a height of 190 ft at a distance of 4 miles from the runway, I will put in a prayer for all the poor pilots relying on this ILS system hi hi. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] MVP Frequency Range
Laryn, "92" is 806-870 MHz. Stan -Original Message- From: Laryn Lohman [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 29, 2004 12:16 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MVP Frequency Range Hi all, what frequency range is "92" for an MVP? The highest I see in my docs is 91, which is 494-512 mc. Thanks Laryn K8TVZ Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Hello, Did I mention this tower is going to be 4 miles due West of the South end of the runway, in other misspelled words, perpendicular to the runway. Thank God for spel chek! Paul -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 28, 2004 9:05 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Tower Painting and Lighting Paul Finch wrote: > > 20 feet, seems kinda crazy to me but that's the Government for ya! Yep. They probably went by the slide slope (or whatever the other side of that is called - the rise slope?) and it came out to 190 feet at that distance. > They also required that it have red lights at > night as well as being painted! Being painted has nothing to do with the night lighting. It only pertains to daytime - paint or lit. There are some that are both, but only because the owners decided it was better to light it and forget maintenance on the paint, so the paint is faded below standard. But, as long as it's lit, it doesn't matter. There certainly are cases where even below 200' the regulations apply. It's funny to see a power tower painted and lit while others on the same line, even higher in elevation, do not have to be. Same with water towers - the orange and white checkerboards are a hoot. Joe M. Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Re: 4-bay dipole array harness lengths
Steve wrote: > No, authored by the ARRL HQ staff. Well, that explains a lot...=o) -- Jim Barbour WD8CHL Copyright 1972cost a whopping > $3.00 back then... > > Steve, KE4MOB > > --- In Repeater-Builder@yahoogroups.com, Neil McKie <[EMAIL PROTECTED]> > wrote: > >> Is that the book written by Bill Pasternak, WA6ITF and >> Mike Morris, WA6ILQ? >> >> Neil - WA6KLA >> >>Steve wrote: >> >>>Nope...I dug up my copy of "FM and Repeaters for the Radio > > Amateur" > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Best way to adjust dev?
Thanks Jim. Great explanation. -Tim -Original Message- From: Jim B. [mailto:[EMAIL PROTECTED] Leave the tone turned off first. If you have any way to put a local mic on the tx, or generate audio DIRECTLY into the mic input, set the deviation on the transmitter for maximum deviation, usually +/-5Khz (For ham rptrs, I set it up to abt 5.5 to keep folks from going into limiting normally. Ideally, a normal user with reasonable audio should not go into limiting very often.) Then go back and generate 1Khz @ +/-3Khz deviation, and set the repeat level for "3 in, 3 out.". It helps at this point to do a audio sweep and plot in/out deviation across the audio spectrum. Then, with no other mod, set the PL for +/-600-800 hz. -- Jim Barbour WD8CHL Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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/
[Repeater-Builder] want to learn about electronics?
Stumbled across this *excellent* site a few months back. What can be learned here for the cost, is insurmountable. http://www.tpub.com/content/neets/ Take a peek and then stay a while, how 'bout it? --- Learning electronics is like learning to have patience - it takes awhile! What you get out of electronics is based on the time you put into it! happy learning! ~Ben, KB9LFZ __ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Best way to adjust dev?
Tim S. wrote: > What's the best way to adjust the transmit deviation for a repeater. > > I was thinking of doing it this way. > > Setup the service monitor for duplex mode and hook the cable up to the > antenna port on the duplexer. > > Manually key the transmitter and adjust the PL for .6 kHz deviation. > > Then adjust the generator for a 1k tone at kHz deviation with a PL tone at > 6khz deviation. > > Then watching it on the duplex monitor adjust for 3.6 kHz (with .6 being the > TX pl) on the transmitter. > > -Tim Leave the tone turned off first. If you have any way to put a local mic on the tx, or generate audio DIRECTLY into the mic input, set the deviation on the transmitter for maximum deviation, usually +/-5Khz (For ham rptrs, I set it up to abt 5.5 to keep folks from going into limiting normally. Ideally, a normal user with reasonable audio should not go into limiting very often.) Then go back and generate 1Khz @ +/-3Khz deviation, and set the repeat level for "3 in, 3 out.". It helps at this point to do a audio sweep and plot in/out deviation across the audio spectrum. Then, with no other mod, set the PL for +/-600-800 hz. -- Jim Barbour WD8CHL Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Best way to adjust dev?
At 9/28/2004 03:35 PM, you wrote: >What's the best way to adjust the transmit deviation for a repeater. Depends on what your goals are. If you're not highly bandwidth-constrained (not on a 12.5 kHz UHF or 15 kHz 2 meter channel) & are running unlimited hifi audio, you'll want to adjust for 1:1 repeat deviation ratio. The method you suggest should work fine, as the deviation of the two sources will add linearly in that case. If you are using a deviation limiter, you need to make sure that the TX deviation remains below the maximum deviation allowed by your coordination to avoid causing adjacent-channel interference. Using a 1 kHz tone may not be sufficient if your limiter is not flat over the audio passband. Voice or white noise from the repeater receiver driving the TX at a high level (>> 1:1) will assure that your deviation limiting is adjusted properly. Once that's done, you can reduce the repeater TX drive level from the controller to set the deviation ratio to 1:1 or maybe a bit higher depending on your preference. When adjusting the deviation ratio, the repeater TX's CTCSS encode needs to be off. When adjusting the peak deviation (limiter or IDC), the CTCSS needs to be on. I hope this wasn't too confusing; I just wanted to cover all the bases since there are differing philosophies of how repeat audio should or shouldn't be processed. Bob NO6B >I was thinking of doing it this way. > >Setup the service monitor for duplex mode and hook the cable up to the >antenna port on the duplexer. > >Manually key the transmitter and adjust the PL for .6 kHz deviation. > >Then adjust the generator for a 1k tone at kHz deviation with a PL tone at >6khz deviation. > >Then watching it on the duplex monitor adjust for 3.6 kHz (with .6 being the >TX pl) on the transmitter. > >-Tim Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Low and slow? yeah. Engine failure, yeah. I was glad that I wasn't in the aircraft of one that I saw... Years ago I was a crew member on a fireworks show at a county fair and, yes, we had all the paperwork i's dotted and all the t's crossed. This fair has been an annual for over 50 years. Across the street from the fairgrounds was a community airport (Brackett Field, for those that know the area). I'm not a pilot so I don't know the proper terminology, but the tower was a part-time operation, and was closed at night. We made sure that every year during the fair the ATIS announcement had something at the end like "Notice to Airmen: there will be a 12 minute fireworks show launched from the fairgrounds horse race track infield at or just after 9pm every night from (date) to (date). Shells will burst at from 200 to 700 feet altitude. Landing during the show is NOT recommended." Halfway through the show one night about 5-8 years ago our observer pointed out this single engine Cessna orbiting the area at about 2,000' obviously waiting for the show to end. All of a sudden his engine quits. He does a military- style wingover and dives for the runway. We stopped the show and watched him land then continued shooting I could just see a 5" or 6" shell going past his leading edge if we hadn't stopped. I'll let the reader imagine the pucker factor of deadsticking through a fireworks show. Mike WA6ILQ At 05:28 PM 9/28/04, you wrote: >mch wrote: > > >If you're low and slow below 200', you had better be near an airport or > >heliport or you're most likely in violation of FAA rules anyway. ;-> > >Heh heh. Very true, very true... 1000' AGL above populated areas. > >But... as the joke goes... > >There are those who've had engine failures, and those who will. >And of course, *no* pilot has ever gotten lost! (Gasp!) > >Sorry, getting OT for this group. ;-) > >Just makin' sure all us radio-heads realize there's a good solid >safety-related reason for all these "silly" tower lighting/painting >rules! Thanks for listening. > >Nate WY0X Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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: [Repeater-Builder] Tower Painting and Lighting
Don't know about that brand, but I believe I understood that energy efficiency was much better on the Red LED beacons than the incandesent beacons. As I recall, from a proposal I received a year or so ago, that a reduced power bill for the Red LED beacons was a selling point. Steve - Original Message - From: "Paul Finch" <[EMAIL PROTECTED]> To: Sent: Tuesday, September 28, 2004 7:42 PM Subject: RE: [Repeater-Builder] Tower Painting and Lighting > Hello > > I am selling a customer a 180 foot Rohn SSV tower, it will be located 4 > miles due West of one end of the West runway. The FAA would not give the > total 200 feet of airspace I requested, said planes would hit it at that > height so they gave me 180 feet. 20 feet, seems kinda crazy to me but > that's the Government for ya! They also required that it have red lights at > night as well as being painted! > > Speaking of which, anyone have anything to say bout the LED red mode compact > beacons like Dialight sells? > > Paul > > > -Original Message- > From: Mark Holman [mailto:[EMAIL PROTECTED] > Sent: Tuesday, September 28, 2004 7:00 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Tower Painting and Lighting > > > You can add if the area close to an Airport I believe 1 mile, also there > will need to be some sort of a once every 24 hr. inspection to the strobes, > and the number to the local F.A.A. facility if the strobes go out the call > must be within a 30 Min. time frame. > > thats the fun of that tall tower. > > > MH, CRO > - Original Message - > From: "mch" <[EMAIL PROTECTED]> > To: > Sent: Tuesday, September 28, 2004 11:05 AM > Subject: Re: [Repeater-Builder] Tower Painting and Lighting > > > > > > Mr. Edgar McKinney wrote: > > > > > > The painting was wavered in our case cause of the tower material could > > > not be painted. > > > > > > At each 50' and 100' are stable reds on with flash strobes for day > > > use. > > > > If you have daytime strobes, that's the reason the paint isn't required. > > You have to have the tower painted (correctly) OR use daytime strobes. > > At night, you have to light it using red or night strobes. This applies > > to any tower over 200' tall or close enough to an airport or heliport to > > be a hazard. > > > > If your tower couldn't be painted, the daytime lighting was/is your only > > option. Do you have any pics of the tower at night? Sounds nice. > > > > Joe M. > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> 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/
