[Repeater-Builder] Repeater Desense?
Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole as a replacement, along with switching out the old coax with 1/2 hardline. Everything else stayed the same, VXR-7000 and internal duplexer. All worked well after a final check, until night came along, when it seems to possible to a casulty of desense? In base mode, tx and rx are wonderful, but when switched to repeater mode as soon as it rx's and attempts to transmit, it cut's itself out. About a one second in, out, back in, out, etc. Not sure what happened but around mid-day it started working fine again, then last night started acting up again. Any thoughts? suggestions? Did recheck all connections from antenna down and everything is tight.
[Repeater-Builder] VXR-7000 Programming
Attempting to program a VXR-7000 using CE-27 (using factory cables software). No problems in the past. This time around, gives a read error invalid data receive. Also, flashes CL and ON repeatedly, along with CLN on the ANI display...can't remember if this occured last time or not. Any advice? Thanks.
[Repeater-Builder] Re: VXR-7000 Programming
:) Software and cable both reflect COM1...I think I remember having to tweak with the driver settings but not sure. Could not find this anywhere in the service manual, any thoughts on what they should be? Baud rate, flow, parity, etc. --- In Repeater-Builder@yahoogroups.com, Bill Hudson w6...@... wrote: Make sure you're on the right com port. Attempting to program a VXR-7000 using CE-27 (using factory cables software). No problems in the past. This time around, gives a read error invalid data receive. Also, flashes CL and ON repeatedly, along with CLN on the ANI display...can't remember if this occured last time or not. Any advice? Thanks.
[Repeater-Builder] recommendation requested....tripod mount install
Looking at mounting a DB224 rooftop. The easiest option would be to use the existing tripod, which is bolted and welded to the steel rooftop. Any opinions on this? Can't find any data on the tripod as far as weight loading, etc. Would a heavy duty tripod hold a 20 foot antenna without a problem in this situation? I'm thinking it may be fine, possibly with some guy lines as well.
[Repeater-Builder] VXR-7000 Troubles
Having some issues w/ a VXR-7000, email me at [EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) if you are familiar w/ this model and would be willing to help! **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15ncid=aolhom000301)
[Repeater-Builder] VHF Repeater Antenna
Looking to replace our current VHF Comm. repeater antenna w/ a higher quality antenna. Orginally wanted the DB series 4bay dipole but not sure if our current install setup will hold such a beast! Another thought was using the Antenex series (YDA1504) on a lighter weight mast. Any pros/cons w/ the Antenex product? Or anyone ever sidemount a db dipole mast to a building?
[Repeater-Builder] DB224 Mounting
Looking at purchasing a DB224 Antenna for our VHF Repeater. The current antenna is mounted to a tripod w/ mast. The tripod's feet are welded to the metal roof. Any thoughts of whether to use the existing tripod mast for the DB224? I know it is quite a bit heavier than small stick we have currently.
[Repeater-Builder] BiDirectional Repeater Cable?
Has anyone actually used this product?: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=5813655761 Seems to bea repeater maker cable that offers full DUPLEX for both radios, through the Acc pins. Was interested in using this for a few cross-band systems, if we can use a total of only 2 radios for both Tx and Rx that'd be great! Anyone that's used this product, let me know if it works. Thanks! YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Re: BiDirectional Repeater Cable?
Thanks for the response. So this is notwhat I thought it sounds like. We are looking to boost indoor handheld coverage so our theory was to use this cablewith a VHF w/ our main repeater freqsand connect it to a UHFfor handheld transmissions.In this case, both radios would need to be able to RX and TX, not one as Rx and one as Tx. Correct? Also had recommendations for arooftop yagi pointing toourmain repeater, to a bi-directional amp, to a indoor omni. As well ashaving multipleon-site repeaters linkedvia UHF. If you have any other thoughts or experience w/ these please let me know! Most of our sites areabout 2-3 miles apart, but we have one that is about 10-15 miles. The mainrepeater isat about 100ftAAT, but2 of our locations are sitting in a river valley which seems to beblocking a good handheld signal. THanks!-Original Message-From: skipp025 [EMAIL PROTECTED]To: Repeater-Builder@yahoogroups.comSent: Sun, 02 Apr 2006 23:03:17 -Subject: [Repeater-Builder] Re: BiDirectional Repeater Cable? I have and they actually work just fine. Although they are very basic and provide no repeater controller options, which include a tail or drop out timer unless you buy the model that has it built in. The cable you ask about takes two Motorola 16 pin radios like the GM300 and M120 units, makes one a repeater receiver and the other a transmitter. I make a similar unit using the rear 16 pin plug/jack and in some examples also/or the front mic jace. Be careful about the ebay sold unit, it's very, very easy to put the cable in upside down, there is no plug polarity key, nor is there a real indication of which side of the plug goes up or down. (unless they've changed their design. cheers, skipp [EMAIL PROTECTED] wrote: Has anyone actually used this product?: _http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=5813655761_ (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=5813655761) Seems to be a repeater maker cable that offers full DUPLEX for both radios, through the Acc pins. Was interested in using this for a few cross-band systems, if we can use a total of only 2 radios for both Tx and Rx that'd be great! Anyone that's used this product, let me know if it works. Thanks! 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/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Handheld antenna on a Mobile Radio?
Has anyone ever used a handheld whip antenna for their mobile radio used as a base? I've seen this setup used a few places, and it worked great, but it was on UHF. A simple 90 degree Mini-UHF to BNC-F, BNC-M on the antenna. I tried this (on our VHF Radio) and it seems to either shut-down the radio or barely get any signal out. Is there any secret to this or a certain antenna type that needs to be used? ie. Base-loaded or Helical Whip.Thanks for any input! YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] FS: VHF 4 Bay Sinclair Antenna Arrays
Just curious.. I've only researched the 4bay DB antennas with one feedline connection. With the 2 leads, could you possibly use one lead for Tx and one for Rx in a repeater setup? Thanks, Ken [EMAIL PROTECTED] YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] VHF Seperation
Could anyone give me some advice regarding antenna seperation fora VHF Repeater... Using TX of 152.000 and RX of 159.000, what would the min. vertical and horizontal be? YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Fw: DB-228
In a message dated 2/14/2006 9:43:42 P.M. Eastern Standard Time, [EMAIL PROTECTED] writes: I haven't tried the 228 yet. But the db-222 I used torun was outstanding. and the db-215 keyhole patternrepeater antenna worked extremely well. You reallycan't go wrong with db-products equipment. Sadly mydb-222 and db-215 are gathering dust in the garagenow. But I have a db-404 ready to go up on 70cm. If you are interested in selling your DB-222, or 215 let me know. Been looking for one for awhile now. Thanks, Ken [EMAIL PROTECTED] YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Re: Need suggestions for 460 repeater antenna
Is there a VHF equivalent for this antenna? Was looking at a DB224 but might be alittle to heavy for our mounting situation. In a message dated 2/6/2006 1:17:51 A.M. Eastern Standard Time, [EMAIL PROTECTED] writes: I agree with Chuck. For the money, the DB-408 is the way to go. Tough, easily handled by most towers and brackets, and a great performer for duplex operation with its wide bandwidth. If you go with the 408, be sure to use Scotchkote on ALL of the molded cable junctions. Three carefully applied coats should give you many years of service. When I say carefully applied I mean just try not to get any in your hair or clothes! It gets everywhere! YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Repeater Receive Preamp
Interested in the idea of placing a preamp on the Rx side to increase HT coverage. I've read in an article they should not be used with Notch-Reject Duplexers though...we have one. Thoughts were to place it in the line between the duplexer and Rx radio on a duplexed, single antenna repeater setup. Any successes or failures with using a preamp w/ this type of duplexer? YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Repeater Assistance in Michigan.
In a message dated 1/6/2006 12:57:17 A.M. Eastern Standard Time, [EMAIL PROTECTED] writes: RG8 is not suitable for duplex operation. There is insufficient shielding and will most likely result inreceiver desense while the transmitter is operating. You might look back in the archives on the Repeater-Builder there has been extensive discussions about this problem and also on the use of 9913 for duplex operation. As mentioned by others ... a change to some other type of a 100% shielded feedline will probably do wonders for your receive problem. Good Luck Larry Thanks for the information. I was curious about this myself as I did read a few of those prior posts... I was told different from the shop, he mentioned that since my run is only about 85feet, it should be fine. What is your opinion? Should I pull it and re-run w/ a hardline, or would this be sufficent for a small run? If it should be replaced, what size hardline do you suggest and will this really make a noticeable difference in Rx? I guess I decided to follow his advice since the system that was in place prior to replacing it w/ my own was also run on RG8, I believe Belden 8214 it said. Thanks again! YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Repeater Assistance in Michigan.
In a message dated 1/6/2006 9:13:32 A.M. Eastern Standard Time, [EMAIL PROTECTED] writes: First, has the system ever performed better than this at any time? My nextstatement would be, and yes they are right about the 9913, but I would have to say that 9913 has nothing to do with shield, as it is a very good shielded cable, just that is presents metal to metal type substance and therefore lets to much noise in, but this would not be an everyday, every minute issue for the system. So you suggest it be replaced? or is it fine to keep? He is not far off on the distance either, I am up 130Ft in the air, 6 dB gain atenna fed with 7/8" hardline, pre-amp with filters, and 8 miles is best for the handheld radio for a signal that is acceptable to listen to. We are up 27.0m, but have an HAAT of 16.4m 3dB gain antenna, and you know the feedline :) What could you expect our max range to be w/ handhelds? Is this performance the same in all directions, or is one direction better than the other. How well is the hand held getting into the system? Are they noisey, or are they just not there? Are there spots that is better than others, location wise? Going south, where terrain stays pretty much flat (except the typical suburb housing of course) gets us 5 miles going north, where the land drops in elevation due to the river only gets us about 2miles...we seem to lose signal quite a bit after the "big hill" Both have readable audio till they drop out, after that south has no tx nor rx... and north has rx yet for a couple miles but no tx. Next, is there a possibility of taking the repeater to another antenna and hooking it up and doing some testing. Another quesiton that was not asked, and did not see mentioned, what is the power output of the hand held radios? Are they in a building, or are they outside? 5watt handhelds, we did our testing outside, but need them to work inside too.. someday :) Mathew YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Repeater Assistance in Michigan.
Looking for assistance w/ a new repeater system in GR, Michigan... Could use a hand in finding out why we can not pick-up 5watt handheld's only 5 miles out, maybe we missed something in setup? If anyone is knowledgable in troubleshooting repeaters or in the GR area, please contact me! Small business that can't quite afford the $70/hr charge for a tech right now lol. Thanks! 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] Repeater Assistance in Michigan.
I'll try what Eric mentionedwhen I get a chance to go out to the site... as for now, I'll try to answer Mathew's questions... Antenna Height = 27.0m, rooftop tripod HAAT = 16.4, elevation gains going south but drops quite a bit going north. Gain = purchased an Antenex FG1523, 3dB Fiberglass Omni Feedline = RG8, mentioned 9913 when I went to the shop but the coax has no markings on it when I got it so I'm not quite sure if I got it or not :) Power of Transmitter = 50w, 35w after duplexer Duplexer = Sinclair MR256B*2 - Mobile Type, tuned by shop VHF-Hi, 152.8850 159.5400 Thanks!-Original Message-From: Mathew Quaife [EMAIL PROTECTED]To: Repeater-Builder@yahoogroups.comSent: Thu, 5 Jan 2006 18:47:36 -0800 (PST)Subject: RE: [Repeater-Builder] Repeater Assistance in Michigan. It would be helpful to know how high the antenna is, gain, feedline and power of the transmitter, and as Eric said, what type of duplexers, etcAre we dealing with VHF or UHF? Mathew Eric Lemmon [EMAIL PROTECTED] wrote: Since a repeater's range is limited *primarily* by its ability to receive,you should concentrate on those factors which directly affect receivesensitivity. One of the most common problems is the use of a duplexer thathas insufficient isolation for the combination of transmitter power andreceiver sensitivity. A transmitter PA that produces a "dirty" signal (onewith spurs) coupled with a broadband receiver will require much moreisolation than a pure-carrier tube PA and a very narrow-band receiver.Does the range improve if you reduce transmitter power to, say, 20 watts?Does the range improve if you remove any preamplifier on the receive side?Does the range improve if you put a single bandpass cavity with 1.0 dB ofinsertion loss between the duplexer and the receiver? Is the duplexer*known* to be properly tuned?73, Eric Lemmon WB6FLY-Original Message-From: Repeater-Builder@yahoogroups.com[mailto:[EMAIL PROTECTED] On Behalf Of kfd29Sent: Thursday, January 05, 2006 3:29 PMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Repeater Assistance in Michigan.Looking for assistance w/ a new repeater system in GR, Michigan... Could usea hand in finding out why we can not pick up 5 watt handhelds only 5 milesout, maybe we missed something in setup? If anyone is knowledgable introubleshooting repeaters or in the GR area, please contact me! Smallbusiness that can't quite afford the $70/hr charge for a tech right now lol.Thanks!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/ Yahoo! PhotosRing in the New Year with Photo Calendars. Add photos, events, holidays, whatever. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] polyphaser Help
Replacing a small, rooftop (about 90ft) repeater setup. The prior system had no lighting protection, just straight coax from antenna to duplexer. I was looking into getting a polyphaser if needed but there is no way to ground it that I can tell. Two options I have would be to somehow tap into the metal roof and connect it to that? or at the radio-end of the coax attach it to a nearby AC outlet's ground?A grounding line/rods aren't a real good option since it is on another businesses property. Any suggestions? YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] DB224-E Data
Does anyone have a used DB224 available for sale or know a dealer w/ a good price? YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Sinclair VHF Duplexer
Anyone familiar w/ the Sinclair Duplexer model #MR256B*2?? From what I can find it's set on a 5MHz freq seperation, according to Sinclair it would have to go back to factory for retune for anything different. any comments? Thanks YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Sinclair VHF Duplexer
In a message dated 12/13/2005 7:43:40 PM Eastern Standard Time, [EMAIL PROTECTED] writes: ---It's a typical mobile type duplexer. Notch only, can only handle 50watts and not that much isolation. Not to mention that at 5 Mhz, it'sunusable for amateur use. the 50 watt limit is fine with our system. We purchased it off of another business that upgraded their repeater for use with our business repeater using VHF-Hi. Their freq pair was spaced at 5 MHz though, and ours is not; so my question was if this can be retuned at my local radio shop to support the more than 5MHz of seperation, or if (like Sinclair said) it has to go back to the factory. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] New Repater Sytem Help!!!
We installed a small repeater system on our new fire station and are not getting the coverage we expected at all. Our antenna sits about 27m up on top of the building. The repeater is a 50watt VHF w/ duplexer. I believe it's the old coax we are using, which I think is about 15 yrs old and may have been hit by lighting in the past. If anyone can help us out it would be great!! I have many questions but for now,,, what type of coax should we get if this needs to be replaced? What about a lighting arrestor, necessary? Would a rusty, old tripod work fine or will it cause some kind of interference? and with this height, about what kind of range can we except (we use mostly 5watt portables). Thanks for the help!! We are trying to save money in our small dept by troubleshooting it the best we can before calling the pros lol. Please e-mail me w/ your advice, or questions [EMAIL PROTECTED] 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/
