RE: [Repeater-Builder] Re: Converting the Kenwood TKR-820 to use with D-STAR
An acquaintance of mine worked at one of the laserdisk manufacturing plants for about a year. He told me that while he was there the yield was never over 19%. That means that at least 80 out of every 100 pressed were tossed into a dumpster. They were hauled away and ground up into plastic chunks, melted down (that was part of the deal) and used to make drinking glasses. At 11:58 AM 06/29/10, you wrote: Easy with the laserdisk now ;) I still have a nice collection here. Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of nj902 Sent: Tuesday, June 29, 2010 1:50 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Converting the Kenwood TKR-820 to use with D-STAR --- In Repeater-Builder@yahoogroups.com, David Jordan wa3...@... wrote: ... I think D-STAR will end up like Quadraphonic sound.just a matter of time. .. Agreed. D-Star had the misfortune to roll out just ahead of the economic downturn. D-Star may trudge on much like LaserDisk did - Pioneer was pretty much the only one backing it just as D-Star has one major backer. LaserDisk survived until a better format won acceptance so it will be interesting to see where amateur VHF/UHF digital voice winds up. This quote from the Wikipedia LaserDisk article may fit D-Star in a couple of years: ...the format was poorly received in North America. In Europe and Australia, it remained largely an obscure format. It was, however, much more popular in Japan ... Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/29/10 06:35:00 Yahoo! Groups Links
Re: [Repeater-Builder] OT:Printing google or Bing maps from the web
Does print screen work, or else a screen dump to the printer, cannot remember the keystroke something like Ctrl-printscreen and them shift-printscreen i think Marcus On Wed, Jun 30, 2010 at 1:42 PM, Don Kupferschmidt dkupf...@sbcglobal.netwrote: All, I'm trying to print a map which was brought up on either google or bing maps on the internet and then export it to a bmp or jpg file which then I can print to an ink jet printer. I've tried and tried to figure this out, but cannot to find a solution. Has anyone been successful in doing this? Or do I need more software? O/S is x/p Pro. TIA, Don, KD9PT
Re: [Repeater-Builder] OT:Printing google or Bing maps from the web
Don, capture it with Alt + Printscreen then open an Excel spread sheet, then drop your captured screen to it with Control V Now you can print it. 73 John VE3AMZ - Original Message - From: Don Kupferschmidt To: Repeater-Builder@yahoogroups.com Sent: Tuesday, June 29, 2010 9:42 PM Subject: [Repeater-Builder] OT:Printing google or Bing maps from the web All, I'm trying to print a map which was brought up on either google or bing maps on the internet and then export it to a bmp or jpg file which then I can print to an ink jet printer. I've tried and tried to figure this out, but cannot to find a solution. Has anyone been successful in doing this? Or do I need more software? O/S is x/p Pro. TIA, Don, KD9PT
[Repeater-Builder] I never learn
When our lawn mower broke and wouldn't run, my wife kept hinting to me that I should get it fixed.. But, somehow I always had something else to take care of first, the shed, the Ute, making beer.. Always something more important to me. Finally she thought of a clever way to make her point. When I arrived home one day, I found her seated in the tall grass, busily snipping away with a tiny pair of sewing scissors. I watched silently for a short time and then went into the house.. I was gone only a minute, and when I came out again I handed her a toothbrush. I said, 'When you finish cutting the grass, you might as well sweep the driveway.' The doctors say I will walk again, but I will always have a limp. _ New, Used, Demo, Dealer or Private? Find it at CarPoint.com.au http://clk.atdmt.com/NMN/go/206222968/direct/01/
RE: [Repeater-Builder] Re: Converting the Kenwood TKR-820 to use with D-STAR
Sounds about right. Press 2 disks then glue them together to make 1 completed laserdisk. I remember when laserdisk added a digital audio track. That was cool. You got analog video, and your choice of analog or digital audio. I remember when laserdisk added an AC3 track. Well, they added an ac3 track but delete an analog channel. That irritated me a little. I had, and still have some analog audio ONLY laserdisk player. This meant that the ac3 disk would play back in mono on these player. Ya know, the laserdisk reference parallels closer to dual mode repeaters than one might think. Analog video (never changed) Analog audio AND digital audio on the same media Reduce the analog bandwidth in favor of a new feature rich digital medium. ;) Yes, my poor brain thinks that way Kb0wlf Oh yes, my main laserdisk player still runs through a dwin line doubler -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Mike Morris Sent: Wednesday, June 30, 2010 12:51 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: Converting the Kenwood TKR-820 to use with D-STAR An acquaintance of mine worked at one of the laserdisk manufacturing plants for about a year. He told me that while he was there the yield was never over 19%. That means that at least 80 out of every 100 pressed were tossed into a dumpster. They were hauled away and ground up into plastic chunks, melted down (that was part of the deal) and used to make drinking glasses. At 11:58 AM 06/29/10, you wrote: Easy with the laserdisk now ;) I still have a nice collection here. Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of nj902 Sent: Tuesday, June 29, 2010 1:50 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Converting the Kenwood TKR-820 to use with D-STAR --- In Repeater-Builder@yahoogroups.com, David Jordan wa3...@... wrote: ... I think D-STAR will end up like Quadraphonic sound.just a matter of time. .. --- - Agreed. D-Star had the misfortune to roll out just ahead of the economic downturn. D-Star may trudge on much like LaserDisk did - Pioneer was pretty much the only one backing it just as D-Star has one major backer. LaserDisk survived until a better format won acceptance so it will be interesting to see where amateur VHF/UHF digital voice winds up. This quote from the Wikipedia LaserDisk article may fit D-Star in a couple of years: ...the format was poorly received in North America. In Europe and Australia, it remained largely an obscure format. It was, however, much more popular in Japan ... Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/29/10 06:35:00 Yahoo! Groups Links Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/29/10 18:35:00
[Repeater-Builder] 1296 cavity filter
Hi to all. I'm searching a valid project of 1296MHz cavity filter. Schematic, images are appreciated. I would use it on 1296 fm repeater and atv repeater 1240/1290. Could be interesting a project of cavity filter with unique antenna out. Someone can help me? Many thanks 73 Roberto IS0GRB
[Repeater-Builder] 1296 cavity filter
Hi to all. I'm searching a project of 1296 cavity filter, to use also for atv 1240/1290MHz. Could be interesting also a project of 1296 cavity filter with unique antenna out. Someone can help me? Many thanks Best 73 Roberto IS0GRB
[Repeater-Builder] Re: OT:Printing google or Bing maps from the web
Do a shift print screen of the map. Open paint and paste the image using the editor menu. It can be edited at this point by copying what is desired and pasting it to a new screen. Save as a file that can be opened by picture viewer(bitmap,bmp). Picture viewer has a much better printing method then paint does. Paul kb9wlc --- In Repeater-Builder@yahoogroups.com, x.tait.tech x.tait.t...@... wrote: Does print screen work, or else a screen dump to the printer, cannot remember the keystroke something like Ctrl-printscreen and them shift-printscreen i think Marcus On Wed, Jun 30, 2010 at 1:42 PM, Don Kupferschmidt dkupf...@...wrote: All, I'm trying to print a map which was brought up on either google or bing maps on the internet and then export it to a bmp or jpg file which then I can print to an ink jet printer. I've tried and tried to figure this out, but cannot to find a solution. Has anyone been successful in doing this? Or do I need more software? O/S is x/p Pro. TIA, Don, KD9PT
Re: [Repeater-Builder] 1296 cavity filter
Try running a 440 cavity filter in 3/4 wave mode. On Wed, Jun 30, 2010 at 5:52 AM, robertogrb is0...@is0grb.it wrote: Hi to all. I'm searching a project of 1296 cavity filter, to use also for atv 1240/1290MHz. Could be interesting also a project of 1296 cavity filter with unique antenna out. Someone can help me? Many thanks Best 73 Roberto IS0GRB Yahoo! Groups Links
Re: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web
Y'all don't even need to hold down shift or ctrl, or alt. Just hit print screen, open paint up and paste (ctrl V). Save it as JPG / IMG / whatever format you need it. Edit photo / crop as necessary and print. :-) Cheers! John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmn - Original Message - From: pgget To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 30, 2010 7:45 AM Subject: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web Do a shift print screen of the map. Open paint and paste the image using the editor menu. It can be edited at this point by copying what is desired and pasting it to a new screen. Save as a file that can be opened by picture viewer(bitmap,bmp). Picture viewer has a much better printing method then paint does. Paul kb9wlc --- In Repeater-Builder@yahoogroups.com, x.tait.tech x.tait.t...@... wrote: Does print screen work, or else a screen dump to the printer, cannot remember the keystroke something like Ctrl-printscreen and them shift-printscreen i think Marcus On Wed, Jun 30, 2010 at 1:42 PM, Don Kupferschmidt dkupf...@...wrote: All, I'm trying to print a map which was brought up on either google or bing maps on the internet and then export it to a bmp or jpg file which then I can print to an ink jet printer. I've tried and tried to figure this out, but cannot to find a solution. Has anyone been successful in doing this? Or do I need more software? O/S is x/p Pro. TIA, Don, KD9PT
Re: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web
Correct. That's what I posted earlier. Works great and is easy. Chuck WB2EDV - Original Message - From: La Rue Communications To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 30, 2010 11:19 AM Subject: Re: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web Y'all don't even need to hold down shift or ctrl, or alt. Just hit print screen, open paint up and paste (ctrl V). Save it as JPG / IMG / whatever format you need it. Edit photo / crop as necessary and print. :-) Cheers! John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmn
[Repeater-Builder] Death of a Service Monitor
Worth watching if a service monitor ever caused you frustration. http://www.youtube.com/watch?v=3nXbBS3lVXU 73, Joe, k1ike
Re: [Repeater-Builder] Death of a Service Monitor
Expect to see them on e-Pay soon ... ...worked last time we plugged them (in)... 73, Dick, W1KSZ -Original Message- From: Joe k1ike_m...@snet.net Sent: Jun 30, 2010 8:36 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Death of a Service Monitor Worth watching if a service monitor ever caused you frustration. http://www.youtube.com/watch?v=3nXbBS3lVXU 73, Joe, k1ike Yahoo! Groups Links
RE: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web
Google earth isn't Google maps. Kb0wlf From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Bill Hudson Sent: Wednesday, June 30, 2010 10:42 AM To: Repeater-Builder@yahoogroups.com Cc: dkupf...@sbcglobal.net Subject: RE: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web I guess I don't get it. What am I missing? Gee, That was easy! Google Earth: File, Print. Then you choose the quality that you want: . and it sizes the picture only, to print nicely on your printer. Two clicks of the mouse. Very intuitive. You must be looking for something more complicated than I realize. Bill Hudson W6CBS No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/30/10 06:36:00
RE: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web
Thanks, I knew it was just too easy! This is OT anyway, but thanks. Bill _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chris Curtis Sent: Wednesday, June 30, 2010 9:03 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web Google earth isn't Google maps. Kb0wlf From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Bill Hudson Sent: Wednesday, June 30, 2010 10:42 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Cc: dkupf...@sbcglobal.net mailto:dkupfers%40sbcglobal.net Subject: RE: [Repeater-Builder] Re: OT:Printing google or Bing maps from the web I guess I don't get it. What am I missing? Gee, That was easy! Google Earth: File, Print. Then you choose the quality that you want: . and it sizes the picture only, to print nicely on your printer. Two clicks of the mouse. Very intuitive. You must be looking for something more complicated than I realize. Bill Hudson W6CBS No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/30/10 06:36:00
Re: [Repeater-Builder] Death of a Service Monitor
This guy needs to work on his aim. :-) Can totally relate though!! THE HUMANITY THE HUMANITY!!! John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmn - Original Message - From: Joe To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 30, 2010 8:36 AM Subject: [Repeater-Builder] Death of a Service Monitor Worth watching if a service monitor ever caused you frustration. http://www.youtube.com/watch?v=3nXbBS3lVXU 73, Joe, k1ike
[Repeater-Builder] Rebanding question (was wrong subject before)
Does anyone know offhand: a) when rebanding will be complete in the USA. b) when it will be complete in PA. Thanks, Joe M.
Re: [Repeater-Builder] Rebanding question (was wrong subject before)
Can't answer either question but here is your source for all things rebanding on 800 MHz. http://www.800ta.org/ Dave NN4TT From: ncc74656_uss_voyager m...@nb.net To: Repeater-Builder@yahoogroups.com Sent: Wed, June 30, 2010 12:49:17 PM Subject: [Repeater-Builder] Rebanding question (was wrong subject before) Does anyone know offhand: a) when rebanding will be complete in the USA. b) when it will be complete in PA. Thanks, Joe M.
[Repeater-Builder] How to Disable - Block - Remove Yahoo Trending
How to Disable - Block - Remove Yahoo trending If anyone else on the group using Yahoo (Classic) Email is annoyed enough (me being very civil about the subject) by the scrolling Yahoo Trending Display, you can stop it by plugging the no-script add-on into your Mozilla Web Browser. It's possible to regain your composure... maybe not your sanity or what's left of it. cheers, s.
Re: [Repeater-Builder] OT:Printing google or Bing maps from the web
Don, There are no Shift, Alt or Ctrl keys needed for the capture. With the Map displayed on the screen, simply press [PrintScreen] unshifted. This puts the image on the Windows clipboard. Now... (1) Open MS Paint. (Start, All Programs, Accessories, Paint) (2) [Ctrl]+[V] pastes the image into Paint. (3) Select the area to be saved to eliminate uneeded stuff around the edges. (4) [Ctrl]+[X] snips out the selected area, which is now on the clipboard. (5) Move the cursor to the File menu at top of screen and select New. (Click no when asked if you want to save the current file.) (6) Staring from the new blank file displayed, [Ctrl}+[V} inserts the area selected from the original screen save into Paint. (7) Save it as a JPEG. (8) Use MS Windows Picture Fax Viewer to display and print, insert the image into a document, etc., lots of options. This seems like many steps, but it's actually pretty quick, and saving as a JPEG leaves many options. Works great during videos, too. 73, Paul, AE4KR - Original Message - From: Don Kupferschmidt To: Repeater-Builder@yahoogroups.com Sent: Tuesday, June 29, 2010 7:42 PM Subject: [Repeater-Builder] OT:Printing google or Bing maps from the web All, I'm trying to print a map which was brought up on either google or bing maps on the internet and then export it to a bmp or jpg file which then I can print to an ink jet printer. I've tried and tried to figure this out, but cannot to find a solution. Has anyone been successful in doing this? Or do I need more software? O/S is x/p Pro. TIA, Don, KD9PT
Re: [Repeater-Builder] OT:Printing google or Bing maps from the web
Hi Paul, Many thanks to all who responded to my post. I was able to experiment with your suggestions and then I exported the map from the screen into paint and save it to a jpeg. I borrowed a copy of Photo Studio from a friend and in playing around with it I was able to crop the picture and then add my notations. Paul, you are definitely right about saving it to a jpeg. Lots of options to play with. Again, many thanks to all. Don, KD9PT - Original Message - From: Paul Plack To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 30, 2010 2:06 PM Subject: Re: [Repeater-Builder] OT:Printing google or Bing maps from the web Don, There are no Shift, Alt or Ctrl keys needed for the capture. With the Map displayed on the screen, simply press [PrintScreen] unshifted. This puts the image on the Windows clipboard. Now... (1) Open MS Paint. (Start, All Programs, Accessories, Paint) (2) [Ctrl]+[V] pastes the image into Paint. (3) Select the area to be saved to eliminate uneeded stuff around the edges. (4) [Ctrl]+[X] snips out the selected area, which is now on the clipboard. (5) Move the cursor to the File menu at top of screen and select New. (Click no when asked if you want to save the current file.) (6) Staring from the new blank file displayed, [Ctrl}+[V} inserts the area selected from the original screen save into Paint. (7) Save it as a JPEG. (8) Use MS Windows Picture Fax Viewer to display and print, insert the image into a document, etc., lots of options. This seems like many steps, but it's actually pretty quick, and saving as a JPEG leaves many options. Works great during videos, too. 73, Paul, AE4KR - Original Message - From: Don Kupferschmidt To: Repeater-Builder@yahoogroups.com Sent: Tuesday, June 29, 2010 7:42 PM Subject: [Repeater-Builder] OT:Printing google or Bing maps from the web All, I'm trying to print a map which was brought up on either google or bing maps on the internet and then export it to a bmp or jpg file which then I can print to an ink jet printer. I've tried and tried to figure this out, but cannot to find a solution. Has anyone been successful in doing this? Or do I need more software? O/S is x/p Pro. TIA, Don, KD9PT
[Repeater-Builder] RG-142B/U
I have access to some Belden 83242 coax which is of RG-142B/U type. The specifications look pretty good but I was wondering if anyone has any inputs or thoughts on it's use. Also, does it require any special connectors? Thanks
Re: [Repeater-Builder] RG-142B/U
It is decent stuff but it has a silver covered copper clad steel (yes steel, test it with a magnet) center conductor. If you don't immobilize it after installation, you run risk of noise (and other problems) when the steel core breaks from metal fatigue. If it is free, great! Get all you can. Better to use (imho) RG400 or RG223u. (If you got to stay small). Connectors for RG58 are usually suitable, but in some cases specific RG 142 connectors are required. 73 Norm - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Wed Jun 30 16:27:45 2010 Subject: [Repeater-Builder] RG-142B/U I have access to some Belden 83242 coax which is of RG-142B/U type. The specifications look pretty good but I was wondering if anyone has any inputs or thoughts on it's use. Also, does it require any special connectors? Thanks
Re: [Repeater-Builder] RG-142B/U
On Wed, 30 Jun 2010, NORM KNAPP wrote: It is decent stuff but it has a silver covered copper clad steel (yes steel, test it with a magnet) center conductor. If you don't immobilize it after installation, you run risk of noise (and other problems) when the steel core breaks from metal fatigue. If it is free, great! Get all you can. Better to use (imho) RG400 or RG223u. (If you got to stay small). Connectors for RG58 are usually suitable, but in some cases specific RG 142 connectors are required. 73 Norm I second what he said. I'm in the process of trying to replace my RG-142 jumpers with RG-400. Also, RG-142, while well shielded, does have appreciable loss per foot at the higher frequencies. -- Kris Kirby, KE4AHR Disinformation Analyst
[Repeater-Builder] lowband HT antennas
I know I am revisiting this again but I could use some clarification. It has been stated before that the Motorola low band helical antennas have a useful bandwidth of about 1MHz. I was just wondering why that was the case, say in comparison to HT antennas in other bands. For instance, (and correct me if I am wrong) the mid UHF (430-470MHz) radios often all use the same 6 1/4 wave whip. What am I missing? I know that the first type of antenna is loaded and the other is a 1/4 wave whip, but beyond that I don't understand the fundamental differences that would allow one a wider bandwidth over the other. Please pardon my antenna theory ignorance Also, in relation to that, what use would be a 99 channel MT1000 unless one either programmed the frequencies on quite a narrow spread, or carried multiple antennas? Thanks in advance, Albert
RE: [Repeater-Builder] lowband HT antennas
The lower you go in frequency, the more metal you need to make an impact in resonant length. Ever try snipping an inch or two off a 160m wire dipole? Doesn't make a difference until you take a couple feet off. Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of hitekgearhead Sent: Wednesday, June 30, 2010 9:58 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] lowband HT antennas I know I am revisiting this again but I could use some clarification. It has been stated before that the Motorola low band helical antennas have a useful bandwidth of about 1MHz. I was just wondering why that was the case, say in comparison to HT antennas in other bands. For instance, (and correct me if I am wrong) the mid UHF (430-470MHz) radios often all use the same 6 1/4 wave whip. What am I missing? I know that the first type of antenna is loaded and the other is a 1/4 wave whip, but beyond that I don't understand the fundamental differences that would allow one a wider bandwidth over the other. Please pardon my antenna theory ignorance Also, in relation to that, what use would be a 99 channel MT1000 unless one either programmed the frequencies on quite a narrow spread, or carried multiple antennas? Thanks in advance, Albert Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/30/10 06:36:00
RE: [Repeater-Builder] lowband HT antennas
I guess I should have simply said the lower you go, the less useable bandwidth you have at a given length. My apologies. As with the aforementioned 160m dipole, I get about 15kHz bandwidth without the tuner. Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of hitekgearhead Sent: Wednesday, June 30, 2010 9:58 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] lowband HT antennas I know I am revisiting this again but I could use some clarification. It has been stated before that the Motorola low band helical antennas have a useful bandwidth of about 1MHz. I was just wondering why that was the case, say in comparison to HT antennas in other bands. For instance, (and correct me if I am wrong) the mid UHF (430-470MHz) radios often all use the same 6 1/4 wave whip. What am I missing? I know that the first type of antenna is loaded and the other is a 1/4 wave whip, but beyond that I don't understand the fundamental differences that would allow one a wider bandwidth over the other. Please pardon my antenna theory ignorance Also, in relation to that, what use would be a 99 channel MT1000 unless one either programmed the frequencies on quite a narrow spread, or carried multiple antennas? Thanks in advance, Albert Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 06/30/10 06:36:00
Re: [Repeater-Builder] lowband HT antennas
- Original Message - From: hitekgearhead hitekgearh...@hotmail.com I know I am revisiting this again but I could use some clarification. It has been stated before that the Motorola low band helical antennas have a useful bandwidth of about 1MHz. I was just wondering why that was the case, say in comparison to HT antennas in other bands. For instance, (and correct me if I am wrong) the mid UHF (430-470MHz) radios often all use the same 6 1/4 wave whip. What am I missing? I know that the first type of antenna is loaded and the other is a 1/4 wave whip, but beyond that I don't understand the fundamental differences that would allow one a wider bandwidth over the other. Please pardon my antenna theory ignorance Proportionally, there is less difference between 450 to 470 MHz (20 / 450, or 4.44%) than there is between 30 to 36 MHz ( 6 / 30, or 20%) or even 42 to 50 MHz (that'd be 8 / 42, or 19%). Receive won't be affected very much (although you could measure the difference) but transmitting would have 2:1 or worse SWR. That's why at home I run a j-pole tuned to 52.52 for FM and repeater work, and a 3-el Yagi tuned to 50.2 for SSB work. If I tried swapping antennas for the different modes, I get a 2.5 SWR. I then go oh shoot and flip the switch back. :-) (And on-topic, I'm running 1/4 wave antennas tuned for 51.55 receive and 53.25 transmit. :-) Ray, KB0STN
RE: [Repeater-Builder] lowband HT antennas
Real easy to visualise consider the length of a wavelength then lay the antenna against it the ht stick gets shorter in comparision the lower in frequency _ New, Used, Demo, Dealer or Private? Find it at CarPoint.com.au http://clk.atdmt.com/NMN/go/206222968/direct/01/
