Re: [Repeater-Builder] Tower cost?
Offhand, I would say 50% to 75% of what new sections would cost. I am hoping to get something at little or no cost myself, like a tower that had been used for a TV antenna. A number of those around no longer being used. Just a matter of finding one. The last tower I was offers was an old cracnkup tower that had a base that was rusted away. It had been given to the person by another ham, mainly to get rid of the thing. Such items become more work than they are worth. But something like you describe can be a good deal. Be sure you can buy a new base for it, or be able to fabricate a good base. Wayne WA2YNE On Sat, Mar 28, 2009 at 7:16 PM, drwoolweaver k5...@ix.netcom.com wrote: Fellows: How much are seven sections of used Rohn 45 tower worth? The tower is on the ground, has been painted, but the galvanized appears to be intact...no rust. No bent sections. Estimates? Thanks de David
Re: [Repeater-Builder] Decibel dipole array sweeps
Jeff, I find this interesting, especially with regard to the db408. Did you test the db408 with both db404's harnessed and working together? Brian, k5in - Original Message - From: Jeff DePolo To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 22, 2009 1:17 PM Subject: RE: [Repeater-Builder] Decibel dipole array sweeps For a parallel-fed (aka binary-fed, corporate-fed, etc.) antenna, if all of the elements are fed in-phase (i.e. the branches in the phasing harness are all the same length), as it typical with most dipole arrays, there won't be any uptilt/downtilt as you vary the transmitter frequency outside of the design range a bit. No matter what the frequency of the carrier is, it's always going to hit the elements in-phase, so there won't be any beamtilt. This is constrast to an end-fed (series-fed) collinear, where you will get UPTILT if transmitting at a frequency ABOVE the antenna's design range, and DOWNTILT if transmitting at a frequency BELOW the antenna's design range. --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Doug Bade Sent: Sunday, March 22, 2009 4:10 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Decibel dipole array sweeps Jeff; This is very interesting findings especially in that using an antenna longer than your freq tends to exhibit down tilt... that 440 use of a 450 antenna seems to be working in the correct direction. I for one found it very interesting to read It may be real interesting to see some of the amateur antennas tested too as multiband ones seem to rarely work very well on the upper bands compared to the lower bands of those I have seen Doug At 02:32 PM 3/22/2009, you wrote: I'm in the process of putting up a remote receiver for a 440 ham repeater using a Decibel DB413 dipole array cut for 450-470 MHz. Since Decibel/Andrew stopped making the 440-450 MHz custom models, I've used the usual 450-470 split antennas for receive sites, and they've performed well. I swept the DB413, and it measured as I expected. While I had the Sitemaster out, I grabbed a few other Decibel dipole arrays out of the warehouse and swept them and prepared a little document. Since the topic of using commercial-band antennas on amateur frequencies comes up fairly often, I figured these measurements might be of some interest to list members. I tested these antennas with them mounted above ground level, and away from nearby objects, with the Sitemaster connected right to the pigtail so what you're seeing is the true return loss at the feedpoint. I'll continue to test more antennas (not just DB dipole arrays) over time and continue to add them to this document. I have gobs of sweeps of antennas, but unfortunately many of them were swept at the bottom end of heliax runs rather than right at the feedpoint. From now on I'll make it a point to sweep them on the ground this way. The antennas I tested in this first batch are: DB413, 450-470 MHz DB408D, 450-470 MHz DB411, 450-470 MHz DB411, 406-420 MHz Note that the DB408D is actually two DB404's on a common mast, each with its own pigtail/feedpoint, so there are separate plots for the upper antenna and lower antenna. Its performance wasn't what I expected. I have more of the same model of antenna, I'll try to test one of the others the next time. The document can be found here: http://www.broadsci.com/Antenna http://www.broadsci.com/Antenna http://www.broadsci.com/Antenna http://www.broadsci.com/Antenna Sweeps r1.pdf If anyone finds this useful please let me know, so I know whether or not it's worth the time/effort to continue to test antennas and add them to the doc. --- Jeff WN3A No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.11.3/1970 - Release Date: 03/21/09 17:58:00
Re: [Repeater-Builder] What is this UHF antenna
K5IN, From the yardstick dimensions of the dipole shown in your photo's it appears to me that your antenna was designed with a center freq. of 485 MHz, but that does not necessarily mean this or other such antennas are unusable, as a Smith Chart design of a suitable simple impedance matching section consisting of series and shunt coax attached at the antenna feed-point coax will correct for the mismatch occurring at lower freq(s). thus negating the need for any dipole or harness modifications. (Been there, done it). Allan Crites WA9ZZU --- On Sat, 3/28/09, Steve Allred rff...@yahoo.com wrote: From: Steve Allred rff...@yahoo.com Subject: Re: [Repeater-Builder] What is this UHF antenna To: Repeater-Builder@yahoogroups.com Date: Saturday, March 28, 2009, 5:50 PM K5IN, The antenna you have is a DB-406. They are a old design and were fairly narrow banded (450-470). As a rule they do not make the Ham band with any kind of return loss numbers that are desirable for use as a 440 repeater antenna. With the loops orientated the way they are in your picture the old DB books showed the antenna to have a gain of approx 10.5 db. You will most likely need to replace the harness, but check it out thoroughly, it just might be one of the rare ones that will work well on the 440 band. 73, Steve / K6SCA --- On Sat, 3/28/09, k5in k...@comcast. net wrote: From: k5in k...@comcast. net Subject: [Repeater-Builder] What is this UHF antenna To: Repeater-Builder@ yahoogroups. com Date: Saturday, March 28, 2009, 2:04 PM I know, I am just another (rank) amateur but here are some pictures of the mystery antenna. It appears to be 3 dipoles fed on the bottom half and 3 on top. Harness definitely appears to be factory made. Hopefully the pics will help someone to identify this for me. I have more pics
[Repeater-Builder] Which UHF Antenna to Buy?
Hi, Now that I have clearly demonstrated my ignorance about multi bay dipole antennas: Which one to buy for the following system. 441.950 output, 2,700ft on a mountain with a 160ft tower. Antenna will live at the 140ft level fed by 78th inch hardline. I need coverage that will include myself 12 air miles away at 50ft ASL, plus a turrane that varies in height from my level up and out to whatever distance. Do any of you with much more experience of antenna's such as the Decibel Products have any suggestions? Of course I could pay hundreds of dollars for site plots and so forth but after all, this is amateur radio. Thanks for reading and your patience too. Brian
RE: [Repeater-Builder] Decibel dipole array sweeps
Did you test the db408 with both db404's harnessed and working together? No, I tested the upper and lower halves seprately. I have some used DB408's (not the dual version) that I'll try to sweep later.
[Repeater-Builder] Wanted: PCRC II Repeater Controller
Does anyone have an old PCRC II Personal Computer Repeater Controller board they are willing to part with? I need to replace an existing PCRC II installation hit by lightning. Software not required, but I am willing to provide a copy(along with a scanned PDF copy of the manual) to anyone that may need the software. Thanks. Kent W9KAO
[Repeater-Builder] Module ID
I just received a bunch of loose items ( some would call junk) and I found a couple of these modules in some ht's. The marking on the edge of the pc board reads (MAXON CA-111C). The marking in the ic chip is MX-COM MX335J. I know this could be an encoder/ decoder, just wondering how to use it if possible and is there any market value in them (2). Thanks 73 Mike - N7ZEF
[Repeater-Builder] Re: Which UHF Antenna to Buy?
Try this web site for a radio propagation plot or map. I f you have any problems using it email me direct - de_n3...@tds.net - and i'll try to help you out. Doug N3DAB - In Repeater-Builder@yahoogroups.com, k5in k...@... wrote: Hi, Now that I have clearly demonstrated my ignorance about multi bay dipole antennas: Which one to buy for the following system. 441.950 output, 2,700ft on a mountain with a 160ft tower. Antenna will live at the 140ft level fed by 78th inch hardline. I need coverage that will include myself 12 air miles away at 50ft ASL, plus a turrane that varies in height from my level up and out to whatever distance. Do any of you with much more experience of antenna's such as the Decibel Products have any suggestions? Of course I could pay hundreds of dollars for site plots and so forth but after all, this is amateur radio. Thanks for reading and your patience too. Brian
[Repeater-Builder] Re: Which UHF Antenna to Buy?
Ooops, forgot to put the website in the last message. http://lrcov.crc.ca/cov.php?lang=en It is free and allows you to play with your parameters. Doug N3DAB --- In Repeater-Builder@yahoogroups.com, k5in k...@... wrote: Hi, Now that I have clearly demonstrated my ignorance about multi bay dipole antennas: Which one to buy for the following system. 441.950 output, 2,700ft on a mountain with a 160ft tower. Antenna will live at the 140ft level fed by 78th inch hardline. I need coverage that will include myself 12 air miles away at 50ft ASL, plus a turrane that varies in height from my level up and out to whatever distance. Do any of you with much more experience of antenna's such as the Decibel Products have any suggestions? Of course I could pay hundreds of dollars for site plots and so forth but after all, this is amateur radio. Thanks for reading and your patience too. Brian
[Repeater-Builder] Re: What is this antenna???
I have a similar DB six element folded dipole antenna that I trying to resurrect. I think it is in the 440-465 range, the flat elements had been relocated around the mast, instead of one above the other, from the original long before I got it. I put the elements back in line as best as I could using what look like the original locations on the mast. I does not test very well. Photos are here on RB: http://groups.yahoo.com/group/Repeater-Builder/photos/album/1010903420/pic/list Thanks for the help, Motarolla Doc Jeff DePolo wrote: If the elements are flat (not tubing), then it's a DB410. They stopped making them probably in the early 80's? --- Jeff
Re: [Repeater-Builder] low band duplexer question
At 3/29/2009 14:09, you wrote: Ok, so I've got a nice looking db-4030 duplexer. Little 6m repeater project cooking. Now, I've got the tuning sheet and also the scan of a fax of a modification sheet for 6m. I also understand it's a reject only setup. My question is, what are the unterminated T connectors doing all over the harness? Please forgive the terrible pictures, I used my cheap motorcycle MP4 camera. There are 4 T connectors that only have a plastic cap over the female part. Just seems crazy to me. Check out the last page of http://www.repeater-builder.com/db/db-4032-low-band-duplexer.pdf. According to the table at the lower right, 6 cables on the DB-4032 (6 can version of the DB-4030) are omitted for splits 1 MHz or greater. Also, unterminated T connectors @ VHF lowband are going to look pretty much like opens, since the line length is very short. Don't know how much leakage you'd get with SO239s; I do know that female Ns left open won't leak, especially @ 50 MHz.. Check the schematic in the above referenced page see if it matches what you have, subtracting the 2 outside cans from the schematic. Bob NO6B
[Repeater-Builder] Sinclair 2H-30-4R6B
I have a Sinclair 2H-30-4R6B and it is different than the mods that are on the Repeater Builder sit.These are 1970's Units and the plunger assembly bolts to the top and has no worm clamp but has a 10-32 hex nut the bottom of the cavity has bolts and no rivets and is a 8 cavity unit. Has anyone ever converted one of these any info on you doing that will be appreciated. I can take a pic if needed just e-mail me. thanks Mike KC8FWD mikekc8...@verizon.net
[Repeater-Builder] Need supplier for UHF welded yagi
Hi All We are duplexing using a UHF 11 element yagi (Cruscraft) in a hostile environment. Last weekend there were a number of 110 MPH gusts. The problem is wind noise. I have tightened the element hardware with some success. Spray it with water and it is quiet while tapping the boom with a small hammer. The beam is mounted on a 1 1/2 inch fiberglass pole. This is a 195 mile link and using 15 watts out of the duplexer. This has worked fairly well for fifteen years but the noise is a recurring problem. Some thoughts using conductive epoxy, came to mind but also I was looking for a supplier of a welded maybe 9 element yagi that might work. We need a yagi to give co channel protection to the North (beam headed East). Gran K6RIF
[Repeater-Builder] Re: Sinclair 2H-30-4R6B
--- In Repeater-Builder@yahoogroups.com, Michael J.Talkington kc8...@... wrote: I have a Sinclair 2H-30-4R6B and it is different than the mods that are on the Repeater Builder sit.These are 1970's Units and the plunger assembly bolts to the top and has no worm clamp but has a 10-32 hex nut the bottom of the cavity has bolts and no rivets and is a 8 cavity unit. Has anyone ever converted one of these any info on you doing that will be appreciated. I can take a pic if needed just e-mail me. thanks Mike KC8FWD Extra Note these have a few ports where the rg 214 stubs are are left unterminated with a red plastic cap! mikekc8...@...
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ - Original Message - From: Gran Clark To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 8:55 PM Subject: [Repeater-Builder] Need supplier for UHF welded yagi Hi All We are duplexing using a UHF 11 element yagi (Cruscraft) in a hostile environment. Last weekend there were a number of 110 MPH gusts. The problem is wind noise. I have tightened the element hardware with some success. Spray it with water and it is quiet while tapping the boom with a small hammer. The beam is mounted on a 1 1/2 inch fiberglass pole. This is a 195 mile link and using 15 watts out of the duplexer. This has worked fairly well for fifteen years but the noise is a recurring problem. Some thoughts using conductive epoxy, came to mind but also I was looking for a supplier of a welded maybe 9 element yagi that might work. We need a yagi to give co channel protection to the North (beam headed East). Gran K6RIF
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Hello Gran, I have had good luck with Antennex welded yagi ant. Tim W7TRH Wa. - Original Message - From: Gran Clark k6...@cox.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 5:55:41 PM GMT -08:00 US/Canada Pacific Subject: [Repeater-Builder] Need supplier for UHF welded yagi Hi All We are duplexing using a UHF 11 element yagi (Cruscraft) in a hostile environment. Last weekend there were a number of 110 MPH gusts. The problem is wind noise. I have tightened the element hardware with some success. Spray it with water and it is quiet while tapping the boom with a small hammer. The beam is mounted on a 1 1/2 inch fiberglass pole. This is a 195 mile link and using 15 watts out of the duplexer. This has worked fairly well for fifteen years but the noise is a recurring problem. Some thoughts using conductive epoxy, came to mind but also I was looking for a supplier of a welded maybe 9 element yagi that might work. We need a yagi to give co channel protection to the North (beam headed East). Gran K6RIF
Re: [Repeater-Builder] Need supplier for UHF welded yagi
I'll second that. Chuck WB2EDV - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:12 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ - Original Message - From: Gran Clark To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 8:55 PM Subject: [Repeater-Builder] Need supplier for UHF welded yagi Hi All We are duplexing using a UHF 11 element yagi (Cruscraft) in a hostile environment. Last weekend there were a number of 110 MPH gusts. The problem is wind noise. I have tightened the element hardware with some success. Spray it with water and it is quiet while tapping the boom with a small hammer. The beam is mounted on a 1 1/2 inch fiberglass pole. This is a 195 mile link and using 15 watts out of the duplexer. This has worked fairly well for fifteen years but the noise is a recurring problem. Some thoughts using conductive epoxy, came to mind but also I was looking for a supplier of a welded maybe 9 element yagi that might work. We need a yagi to give co channel protection to the North (beam headed East). Gran K6RIF
[Repeater-Builder] master 2 Pa board
Hi well i has been many years since reproducing the Shuttle audio from my Master 2 repeater but i think my PA is dead now,,, no more output,i just transmit by the exiter ))) i am looking for just the boards of the pa,i dont need the heat sink,less heavy in mail cost. if you have one ,mine was an 110 or 120 watts i dont recall let me know ok, the rest of my PA may serve me as parts if you have one or know where there is one just send an email thanks for your help gervais ve2ckn Emoticon1.gif
[Repeater-Builder] Re: Need supplier for UHF welded yagi
This is going to sound (read) crazy... but you might try wrapping the antenna with a decent quality electrical tape. s. Gran Clark k6...@... wrote: Hi All We are duplexing using a UHF 11 element yagi (Cruscraft) in a hostile environment. Last weekend there were a number of 110 MPH gusts. The problem is wind noise. I have tightened the element hardware with some success. Spray it with water and it is quiet while tapping the boom with a small hammer. The beam is mounted on a 1 1/2 inch fiberglass pole. This is a 195 mile link and using 15 watts out of the duplexer. This has worked fairly well for fifteen years but the noise is a recurring problem. Some thoughts using conductive epoxy, came to mind but also I was looking for a supplier of a welded maybe 9 element yagi that might work. We need a yagi to give co channel protection to the North (beam headed East). Gran K6RIF
[Repeater-Builder] Re: Sinclair 2H-30-4R6B
These also have red plastic caps on some of the cavity's where the stub should go. Later Mike KC8FWD
[Repeater-Builder] Re: low band duplexer question
My guess from looking at the schematic is that the tee's are for the grounded and ungrounded coaxial cable tuning stubs that were cut for the original freqency and have been apparently removed. Some one else will have to fill you in on how to calculate the length, etc for making replacements. Doug N3DAB --- In Repeater-Builder@yahoogroups.com, n...@... wrote: At 3/29/2009 14:09, you wrote: Ok, so I've got a nice looking db-4030 duplexer. Little 6m repeater project cooking. Now, I've got the tuning sheet and also the scan of a fax of a modification sheet for 6m. I also understand it's a reject only setup. My question is, what are the unterminated T connectors doing all over the harness? Please forgive the terrible pictures, I used my cheap motorcycle MP4 camera. There are 4 T connectors that only have a plastic cap over the female part. Just seems crazy to me. Check out the last page of http://www.repeater-builder.com/db/db-4032-low-band-duplexer.pdf. According to the table at the lower right, 6 cables on the DB-4032 (6 can version of the DB-4030) are omitted for splits 1 MHz or greater. Also, unterminated T connectors @ VHF lowband are going to look pretty much like opens, since the line length is very short. Don't know how much leakage you'd get with SO239s; I do know that female Ns left open won't leak, especially @ 50 MHz.. Check the schematic in the above referenced page see if it matches what you have, subtracting the 2 outside cans from the schematic. Bob NO6B
RE: [Repeater-Builder] low band duplexer question
Ok, thanks to ALL the replies. Yes, the split the duplexer was using IS greater than a 1.5 megs. Therefore, there are no stubs present, shorted or open. So, just little caps over where they would have been. I'll be using a 1.7 meg split so I'm good. From the 6m conversion fax document, the cable lengths are all STOCK. The only difference is the helix in each cavity should be cut to 7 and 1/4 turns. There ya go. there is a ham repeater out there using the 4 can version. I found pictures of the system on the web. They stated their unit was factory built/tuned to their freq, not retunes. Spiffy. 'preciate the help. Guess having open connections on a set of cans spooked me even though they had pretty looking factory caps on them. Chris, Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of n...@no6b.com Sent: Sunday, March 29, 2009 7:30 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] low band duplexer question At 3/29/2009 14:09, you wrote: Ok, so I've got a nice looking db-4030 duplexer. Little 6m repeater project cooking.
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Tessco/Larson sells this one: http://www.tessco.com/products/displayProductInfo.do?sku=57015eventPage=1 Scala is a favorite among broadcasters, and sells this one with a radome: http://www.kathrein-scala.com/catalog/RA5-400B.pdf BTW, Google is amazing. I plugged in welded yagi and at the top of the rankings was your original post. That's fast! 73, Paul, AE4KR - Original Message - From: Gran Clark To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 6:55 PM Subject: [Repeater-Builder] Need supplier for UHF welded yagi Hi All We are duplexing using a UHF 11 element yagi (Cruscraft) in a hostile environment. Last weekend there were a number of 110 MPH gusts. The problem is wind noise. I have tightened the element hardware with some success. Spray it with water and it is quiet while tapping the boom with a small hammer. The beam is mounted on a 1 1/2 inch fiberglass pole. This is a 195 mile link and using 15 watts out of the duplexer. This has worked fairly well for fifteen years but the noise is a recurring problem. Some thoughts using conductive epoxy, came to mind but also I was looking for a supplier of a welded maybe 9 element yagi that might work. We need a yagi to give co channel protection to the North (beam headed East). Gran K6RIF
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Forgot to add that Sinclair makes one for the amateur portion of the band. You can order direct - they have a ham discount. Chuck WB2EDV - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:24 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi I'll second that. Chuck WB2EDV - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:12 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran At 07:34 PM 3/29/2009, you wrote: Forgot to add that Sinclair makes one for the amateur portion of the band. You can order direct - they have a ham discount. Chuck WB2EDV - Original Message - From: mailto:wb2...@roadrunner.comChuck Kelsey To: mailto:Repeater-Builder@yahoogroups.comRepeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:24 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi I'll second that. Chuck WB2EDV - Original Message - From: mailto:ve3...@earthlink.netJohn J. Riddell To: mailto:Repeater-Builder@yahoogroups.comRepeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:12 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ
Re: [Repeater-Builder] low band duplexer question
n...@no6b.com wrote: At 3/29/2009 14:09, you wrote: Ok, so I've got a nice looking db-4030 duplexer. Little 6m repeater project cooking. Now, I've got the tuning sheet and also the scan of a fax of a modification sheet for 6m. I also understand it's a reject only setup. My question is, what are the unterminated T connectors doing all over the harness? Please forgive the terrible pictures, I used my cheap motorcycle MP4 camera. There are 4 T connectors that only have a plastic cap over the female part. Just seems crazy to me. ya know-I look at that and see a 4-port transmit combiner...just thinking out loud...
Re: [Repeater-Builder] Need supplier for UHF welded yagi
Thirded on the Sinclair yagi's... they take a ton of years of abuse, and don't die. Nate WY0X On Mar 29, 2009, at 9:50 PM, Gran Clark wrote: Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran At 07:34 PM 3/29/2009, you wrote: Forgot to add that Sinclair makes one for the amateur portion of the band. You can order direct - they have a ham discount. Chuck WB2EDV - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:24 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi I'll second that. Chuck WB2EDV - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, March 29, 2009 9:12 PM Subject: Re: [Repeater-Builder] Need supplier for UHF welded yagi Gran, you might want to consider a Sinclair yagi...they are built like a battleship ! ...not cheap...but they work well. 73 John VE3AMZ -- Nate Duehr n...@natetech.com
[Repeater-Builder] Re: Need supplier for UHF welded yagi
Sinclair makes decent antennas, but if you really want something to survive in a harsh environment, check out Comprod Communications. http://www.comprodcom.com/en/antennas/base/pdf/480-70.pdf They make antennas that survive nearly anything. Out here on the West Coast we routinely get lots of hard rime ice on coastal mountaintop sites, combined with 100mph+ sustained winds. Sinclair antennas get elements snapped off all the time (inherent design flaws, even on their HD antennas). The Comprod antennas keep on going. Regardless, stay away from Bluewave... they may look like a good antenna (and physically they are strong), but some of their models have water ingress problems which lead to antenna failure. Lee --- In Repeater-Builder@yahoogroups.com, Gran Clark k6...@... wrote: Chuck I will call Sinclair. They don't list a welded antenna. On the beam I have the elements are mounted on the outside of the boom which I would think would be hard to make a good weld if I went that way. Gran
