[Repeater-Builder] Re: Lightning Rod (Bolt)?
--- In Repeater-Builder@yahoogroups.com, Doug Rehman d...@... wrote: [...] I agree about the survivability of folded dipole arrays, but they don't seem to be an option at 900 MHz- at least I don't see them in commercial catalogs and have never encountered an 800 or 900 MHz. www.rfi.com.au - RF Industries do make 800MHz folded dipole arrays to order and can also make 900MHz arrays. Yes, they're good quality, fully welded construction and can be made in S/S or anodised aluminium. If you want some really good info about controlling lightning strikes, go over to www.polyphaser.com and get a copy of their book, The Grounds for Lightning Protection. Its been around a while and does have a bent towards their products but there is plenty of generic info that really helps to understand (in simple terms) the physics of lightning strikes and protection methods. You may have to email them and request it (the last copy I got 3 or 4 years ago they sent to me at no cost - not sure if it is still in print or not but it is worth getting if you can). Cheers, Rodney.
Re: [Repeater-Builder] Re: Lightning Rod (Bolt)?
I didn't see any mention of it being a folded dipole. The picture certainly doesn't look like it is. No mention that it is even DC-grounded. Chuck WB2EDV - Original Message - From: larynl2 lar...@hotmail.com To: Repeater-Builder@yahoogroups.com Sent: Monday, November 02, 2009 11:43 PM Subject: [Repeater-Builder] Re: Lightning Rod (Bolt)? I agree about the survivability of folded dipole arrays, but they don't seem to be an option at 900 MHz- at least I don't see them in commercial catalogs and have never encountered an 800 or 900 MHz. Telewave makes them... http://www.telewave.com/pdf/TWDS-7019.pdf Laryn K8TVZ Yahoo! Groups Links
[Repeater-Builder] 2 digis into 1 antenna
it is possible and if it is how can i use one dual band antenna vhf/uhf with two aprs digipeaters at the same time??? first aprs digipeater 1200bps 144.800mhz second aprs digipeater 9600bps 438.100mhz!! it is possible??? two tranceiver in differend band with one antenna dualband?? thanx
[Repeater-Builder] Re: Weird Interference between APRS and 2-M repeater help needed
We had a similar problem using a Kenwood radio with switching or pin diodes that was on APRS. The repeater and the APRS radio were on DB224's very close to each other. The repeater has 6 cans and the aprs had 1 band pass can. Neither system interfered with the other but we soon discovered we were interfering with every one else. We were able to separate the antennas by 100 feet or more which solved the problem. We now run our packet system, which is similar to aprs, on the old antenna next to the repeater. We are using a Mitrex for the packet which does not have pin diodes. We have no problems. I hope this information helps you for your situation. 73 Wayne, WA5LUY --- In Repeater-Builder@yahoogroups.com, Jeff DePolo j...@... wrote: The repeater might be getting into the PA stage of the APRS radio. Try powering off the APRS radio during the time that you hear the weird noise. I would bet that the noise goes away as soon as the APRS radio in powered off. What kind of radio is being used for APRS? If it's something like a ham-grade transceiver, it's almost guaranteed to have a PIN diode for T/R switching. When crunched by the high-level RF from the repeater transmitter, it's probably making a racket... As others have said, you simply don't have the filtering you need to make this work right. Isolators on both transmitters would be a good start given the tight coupling between antennas; to add an isolator to the APRS radio may mean having to switch to another radio (perhaps a better one) that has a real T/R relay or other means for getting the isolator into the transmit RF path. Then start looking at what it's going to take in terms of filtering to get the carrier and noise rejection required, which will vary depending on what you're using for radios, how much isolation you have between antennas (should be *measured*, not guessed at), etc. Why are the two antennas in the same plane to start with? Can't they be relocated to get some vertical separation? --- Jeff WN3A
RE: [Repeater-Builder] Re: Lightning Rod (Bolt)?
The Telewave catalog does a poor job of describing the antenna; take a look on the write up on page 5 of this PDF: http://www.talleycom.com/PDF/%20TSQ2_09.pdf The picture there shows that it is indeed a folded dipole. Unfortunately the antenna is too heavy for my application- 7 pounds for 6dB and 11 pounds for 9dB. The pricing looks to be about $100/dB. Doug K4AC From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Tuesday, November 03, 2009 7:21 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Lightning Rod (Bolt)? I didn't see any mention of it being a folded dipole. The picture certainly doesn't look like it is. No mention that it is even DC-grounded. Chuck WB2EDV - Original Message - From: larynl2 lar...@hotmail.com mailto:larynl%40hotmail.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Monday, November 02, 2009 11:43 PM Subject: [Repeater-Builder] Re: Lightning Rod (Bolt)? I agree about the survivability of folded dipole arrays, but they don't seem to be an option at 900 MHz- at least I don't see them in commercial catalogs and have never encountered an 800 or 900 MHz. Telewave makes them... http://www.telewave.com/pdf/TWDS-7019.pdf Laryn K8TVZ
Re: [Repeater-Builder] Re: Lightning Rod (Bolt)?
I suspect that the photo used was generic as they talk about antennas from VHF low band right up through. In any event, for your application, it's a moot point. Chuck WB2EDV - Original Message - From: Doug Rehman To: Repeater-Builder@yahoogroups.com Sent: Tuesday, November 03, 2009 9:32 AM Subject: RE: [Repeater-Builder] Re: Lightning Rod (Bolt)? The Telewave catalog does a poor job of describing the antenna; take a look on the write up on page 5 of this PDF: http://www.talleycom.com/PDF/%20TSQ2_09.pdf The picture there shows that it is indeed a folded dipole. Unfortunately the antenna is too heavy for my application- 7 pounds for 6dB and 11 pounds for 9dB. The pricing looks to be about $100/dB. Doug K4AC From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Tuesday, November 03, 2009 7:21 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Lightning Rod (Bolt)? I didn't see any mention of it being a folded dipole. The picture certainly doesn't look like it is. No mention that it is even DC-grounded. Chuck WB2EDV - Original Message - From: larynl2 lar...@hotmail.com To: Repeater-Builder@yahoogroups.com Sent: Monday, November 02, 2009 11:43 PM Subject: [Repeater-Builder] Re: Lightning Rod (Bolt)? I agree about the survivability of folded dipole arrays, but they don't seem to be an option at 900 MHz- at least I don't see them in commercial catalogs and have never encountered an 800 or 900 MHz. Telewave makes them... http://www.telewave.com/pdf/TWDS-7019.pdf Laryn K8TVZ -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.698 / Virus Database: 270.14.47/2478 - Release Date: 11/03/09 02:36:00 No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 9.0.698 / Virus Database: 270.14.47/2478 - Release Date: 11/03/09 02:36:00
[Repeater-Builder] FS VHF Mark 4 repeater
I have a very clean Kendecom Mark 4 VHF repeater for sale options include voice and autopatch. Presently on 145.390 with a pl tone of 151.4hz. The repeater has been bench tested and preforms to factory specs. David Epley, N9CZV Winchester, IN
Re: [Repeater-Builder] 2 digis into 1 antenna
dipexer just like if you had 2 radios in you car dual band radios have then built in On Tue, Nov 3, 2009 at 9:11 AM, asterios sv2...@yahoo.com wrote: it is possible and if it is how can i use one dual band antenna vhf/uhf with two aprs digipeaters at the same time??? first aprs digipeater 1200bps 144.800mhz second aprs digipeater 9600bps 438.100mhz!! it is possible??? two tranceiver in differend band with one antenna dualband?? thanx
Re: [Repeater-Builder] 2 digis into 1 antenna
Rick is on the right path: DIPLEXER This is what is used to separate/combine two different frequency spectrum into/from one feedline/antenna Simply wire it up like this: 144.800 --VHF Port-- \ Diplexer --- Dual-Band Antenna / 438.100 --UHF Port-- Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531 Rick Szajkowski wrote: dipexer just like if you had 2 radios in you car dual band radios have then built in On Tue, Nov 3, 2009 at 9:11 AM, asterios sv2...@yahoo.com mailto:sv2...@yahoo.com wrote: it is possible and if it is how can i use one dual band antenna vhf/uhf with two aprs digipeaters at the same time??? first aprs digipeater 1200bps 144.800mhz second aprs digipeater 9600bps 438.100mhz!! it is possible??? two tranceiver in differend band with one antenna dualband?? thanx No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.424 / Virus Database: 270.14.47/2478 - Release Date: 11/03/09 07:36:00
RE: [Repeater-Builder] Surface Mount Device Soldering Video (very cool)
Sure makes it look easy... Richard http://www.n7tgb.net/ www.n7tgb.net When they call the roll in the Senate, the Senators do not know whether to answer 'present' or 'not guilty.' --President Theodore Roosevelt (1858-1919) _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025 Sent: Tuesday, November 03, 2009 12:03 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Surface Mount Device Soldering Video (very cool) If you have the time, this is a killer video worth watching. http://www.curiousi http://www.curiousinventor.com/guides/Surface_Mount_Soldering/101 nventor.com/guides/Surface_Mount_Soldering/101 enjoy, skipp
[Repeater-Builder] Re: 2 digis into 1 antenna
the diplexer whose also my idea and it is also cheap!! but dualband radios with internal diplexer never tx doth bands at the same time!! something that digis will do!! there is a problem with this??? at the same time tx in differende bands??? two radios one diplexer one dualband antenna!! thanx
[Repeater-Builder] Repeater Bells and Whistles (from an off group source)
I received the below text from a non group member... who was at one time very active in Amateur Repeaters. His opinion and some technical ideas... enjoy, s. [pasted text] In my repeater days I went both ways. Started by wanting to add anything that showed the repeater to be more advanced. We had custom-recorded audio IDs, and at one point, over 500 repeaterisms - semi-humourous statements read in any of several celebrity voices...most had to do with repeaters, like Talkest thou not excessive in length, lest the timepiece of the gods shuttest thou up, in a Charlton Heston-esque voice. Some were mere clips from 60s-era TV I'm tryin' to think but nothin's happenin! in Curly's voice, etc. But in truth, none can be very long and we grew tired, in just a few months, of the sound bites. The system we ended up with in Kalamazoo that I liked best was simple plus diagnostics. We had a courtesy beep and it was the diagnostic reporter. If the incoming signal was more than 500Hz low in carrier frequency, then the beep started at normal pitch, then dropped a whole step. At larger offsets in frequency, the beep dropped further in pitch. High frequency carriers would engender a pitch shift upwards. Of course, this was in the days when most rigs were controlled by a separate xtal per channel, therefore having one of them off, but the others correct wasn't uncommon. For users who were over-deviated, the courtesy beep got louder and was square-wave modulated at 100Hz...a raspy sound. For users whose modulation measured low, the courtesy beep beeped, that is, it went to a series of dits that slowed down until they stopped. The diagnostic mode was enabled any time the repeater had gone more than ten minutes without a transmission of over a minute in length. We had implemented a voice back mode where the repeater played back the last 15 seconds of a received transmission, so people could hear the actual sound of their audio, but not a lot of users liked it, so we shut it off. Nowadays, I just notice what repeaters do or don't do. Around here, it seems that simplicity is the buzzword. A simple courtesy beep is the most any of them seem to have. The exception is that some of them use a voice ID and indicate what the correct subaudible tone to use is. Back in SR, a couple of the local repeaters also had the occasional voice announcement indicating club meeting times/dates and when the club net occurred on the repeater.
Re: [Repeater-Builder] Re: 2 digis into 1 antenna
You can TX on both bands at the same time through a diplexer. It does not matter as long as you don't go over the rated Max power for the two. I have run 50watts on both bands through a diamond diplexer without any problems (was using two single band radios) This was then fed into a dual-band diamond antenna. Easy way to get up and running. Kevin, ZL1KFM. - Original Message - From: asterios To: Repeater-Builder@yahoogroups.com Sent: Wednesday, November 04, 2009 6:56 AM Subject: [Repeater-Builder] Re: 2 digis into 1 antenna the diplexer whose also my idea and it is also cheap!! but dualband radios with internal diplexer never tx doth bands at the same time!! something that digis will do!! there is a problem with this??? at the same time tx in differende bands??? two radios one diplexer one dualband antenna!! thanx
RE: [Repeater-Builder] Surface Mount Device Soldering Video (very cool)
Or those of us with brachial plexopathy Chris Kb0wlf Good video though! -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Matthew Kaufman Sent: Tuesday, November 03, 2009 2:23 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Surface Mount Device Soldering Video (very cool) skipp025 wrote: If you have the time, this is a killer video worth watching. http://www.curiousinventor.com/guides/Surface_Mount_Soldering/101 Alas not many hints in there for those of us with Essential Tremor. Matthew Kaufman Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.424 / Virus Database: 270.14.47/2478 - Release Date: 11/03/09 07:36:00
Re: [Repeater-Builder] Repeater Bells and Whistles (from an off group source)
At 11/3/2009 11:05, you wrote: I love the notion of the courtesy beep as a diagnostic tool, provided it doesn't distract from the content of the traffic. When I was working on repeaters for the Blue Ridge Amateur Radio Society in the Carolinas in the '80s, we were transitioning to CTCSS, but ran the Paris Mountain repeater in carrier-squelch mode except during periods of interference. Because users were trying everything from actual PL reeds to 555 chips as encoders, I programed the SCOM 6K to reverse the high-to-low courtesy beep on transmissions with correctly decoded tones, so users would know if their tones were good even during periods of carrier access. One of the first open CTCSS repeaters here in SoCal (WR6AQD Santiago Peak 145.22) used CTCSS to key the repeater, but the actual receiver squelch was still carrier. Since the hang time was ~3.5 seconds, you didn't need much CTCSS or exactly the right frequency to get through. It was easy to tell who's CTCSS encoders were off frequency, injected into the mic input, etc. by all the courtesy tones going off during the users' transmissions. Bob NO6B
[Repeater-Builder] Maxtrac Repeater
Hello, I just got a bunch of maxtrac 300 radios from a friend. I also found a cross-band repeater cable that I had sitting in a pile. I started playing around, I programing 2 radios as repeaters, hooked the cable up and nothing. The recieve radio indicates it's receiving but does not PTT the other radio. I thought maybe it was the cable, I built a normal repeater cable and it does the same thing. Any ideas Can someone tell me exactly how they have their accessory pins programed? I got into the area where you change them in the RSS but I have no idea if they are set wrong. If it makes a difference, I am using 2 VHF radios, once I know it's working I plan on putting a UHF one in to make it cross-band. Thanks, Kevin
[Repeater-Builder] Make notch duplexer with copper tubing?
I am getting all the materials for a 6 meter repeater, but am hung up on a solution for a duplexer. I have seen several paces showing how to make a notch duplexer with heliax made into 1/4 wave stubs. Since I am unable to locate any large heliax,I was wondering if copper tubing could be used as a similar replacement. It would seem to work since the heliax just forms a folded dipole. Any experience would be greatly appreciated. Josh KC9LGV
[Repeater-Builder] Surface Mount Device Soldering Video (very cool)
If you have the time, this is a killer video worth watching. http://www.curiousinventor.com/guides/Surface_Mount_Soldering/101 enjoy, skipp
Re: [Repeater-Builder] Repeater Bells and Whistles (from an off group source)
I recall the repeaters of the ACC era, how the overused bells and whistles were viewed as advanced, and how so many repeaters coast-to-coast had no individual personalities, only those same canned TI voices and LOUD three-tone courtesy beeps. I also recall how funny it was to hear the male and female robots programmed to argue with each other...until about the 100th play. Digital voice recordings are much nicer to hear than the 'bots, and can reflect local accents and character, but I shake my head every time I hear an inattentive CQ-er start a conversation with the automated ID playback. I love the notion of the courtesy beep as a diagnostic tool, provided it doesn't distract from the content of the traffic. When I was working on repeaters for the Blue Ridge Amateur Radio Society in the Carolinas in the '80s, we were transitioning to CTCSS, but ran the Paris Mountain repeater in carrier-squelch mode except during periods of interference. Because users were trying everything from actual PL reeds to 555 chips as encoders, I programed the SCOM 6K to reverse the high-to-low courtesy beep on transmissions with correctly decoded tones, so users would know if their tones were good even during periods of carrier access. It was subtle, but if you were listening for it, you could easily hear the difference. (I tried to approximate the in-band cue signals used on the old Mutual Broadcast Network, a very distinctive, but low-level bee-doop.) One member apparently didn't read the club newsletter to know about the feature, but noticed one day on the air that he had a high-low beep, while the members of the tech committee had the opposite, low-to-high pitch. He asked why it was different. My partner on the committee told him the repeater knows who daddy is. I was less charitable...I told him it was an IQ detector. I like hearing a Morse letter as a courtesy beep to identify which of the voted receivers or linked repeaters was just heard, provided they're quick and not too loud. Beyond that, except for ancillary functions which can be requested by a user for just that moment, and perhaps an unsolicited readback to identify a serious techical deficiency with a signal just heard, I'm a fan of less is more. 73, Paul, AE4KR - Original Message - From: skipp025 To: Repeater-Builder@yahoogroups.com Sent: Tuesday, November 03, 2009 10:46 AM Subject: [Repeater-Builder] Repeater Bells and Whistles (from an off group source) In my repeater days I went both ways. Started by wanting to add anything that showed the repeater to be more advanced. We had custom-recorded audio IDs, and at one point, over 500 repeaterisms - semi-humourous statements read in any of several celebrity voices... .
Re: [Repeater-Builder] Re: Tone Reeds Needed (swap?)
jerry i have 5 6209 sponders $5 ea+ post
Re: [Repeater-Builder] Surface Mount Device Soldering Video (very cool)
skipp025 wrote: If you have the time, this is a killer video worth watching. http://www.curiousinventor.com/guides/Surface_Mount_Soldering/101 Alas not many hints in there for those of us with Essential Tremor. Matthew Kaufman
Re: [Repeater-Builder] Make notch duplexer with copper tubing?
Use 3/8 which has an outer diameter of .500 for the inner conductor. Use 1 1/4 Type M which has an inner diameter of 1.289. Should be close to 98% velocity factor. I don't know if home depot carries the 3/8, but a 10ft stick of 1 1/4 was $36 last I checked. On Tue, Nov 3, 2009 at 1:14 PM, pet_the_dogg pet_the_d...@yahoo.com wrote: I am getting all the materials for a 6 meter repeater, but am hung up on a solution for a duplexer. I have seen several paces showing how to make a notch duplexer with heliax made into 1/4 wave stubs. Since I am unable to locate any large heliax,I was wondering if copper tubing could be used as a similar replacement. It would seem to work since the heliax just forms a folded dipole. Any experience would be greatly appreciated. Josh KC9LGV Yahoo! Groups Links
[Repeater-Builder] Rugged 420 Omni
I have a need for a 420/425 MHz 6 db or more gain omni antenna for a hub linking site. The site is covered in ice and snow for 6-7 months a year and accessible only by snow cat during those times. Anyone have anything lying around they would like to sell? Whats everyone's favorite antenna for this purpose? Thanks, Joe - WA7JAW
