[Repeater-Builder] EM to Ethernet interfaces
Hello Group, We are looking for simple EM to Ethernet Interfaces. Single or Dual channels would be great as we have an application where we would prefer not to install a complete MUX assembly where something that would provide us with 4 Wire Type1 EM to Ethernet would be ideal. I'm looking forward to your feedback and suggestions. Regards Gareth Bennett (Technical Services) Signals NZ Ltd 8 Manor Place P.O. Box 1439 Dunedin 9015 New Zealand Phone : 03 425-0895(64 3 425-0895) Fax : 03 474-5251(64 3 474-5251) Mobile : 027 458-8377 (64 27 458-8377) Email : [EMAIL PROTECTED] Web: www.signals.net.nz Note: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and any copies of it from your system, and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. LFT Group Ltd reserves the right to monitor ALL e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorised
[Repeater-Builder] Diamond X510 Failure
HI All, After 15 years of faithful service our Diamond X510 dual-band RX antenna has failed. We started getting some noise and poor signal input to the 2mtr repeater. We had decided to check the 2x X510 antennas (1x TX and 1x RX). A couple of weeks ago the TX was checked and found to still be in fairly good condition, we did however solder the crimp joints. Today we pulled the top antenna down which runs the 2mtr RX and the 70cm repeater. Once we opened the antenna we found that it had come apart just above the bottom joint, and the very top of the element was split. Now we know why the RX had turned bad. No recovery for this antenna. We want to replace it with something that can be used for the 2mtr and 70cm repeaters. So far other then the antenna dual-band antennas there is nothing to replace it with from a commercial type. But maybe there is something that could be used? There is a thought that maybe due to the lenght of the antenna and the winds we get up on the hill this has added to the damage. We are thinking to replace it with a Diamond X300 dual-band, a third shorter and a little less gain. Any thoughts on a replacement would be helpful, I will pass it onto the other trustees. Regards and Thanks for reading this email. Kevin, ZL1KFM. Owner/Trustee. Get Skype and call me for free. sparc_nz Description: Binary data
Re: [Repeater-Builder] Diamond X510 Failure
Go with the shorter antenna, but if you need/want the higher gain and your antenna is side-mounted to a tower, consider adding an anti-sway support near the top of the antenna. I've got one on my 20+ foot UHF Super Station Master antenna. It was pricey ($250US) and I don't think it was installed properly, but basically it's a pole with a plastic ring at the end that slips over the antenna. The pole mounts to the tower with two clamps and it keeps the top half of the antenna in one spot. Some rubber O-rings fit around the antenna to fill the gap and make a snug fit. Of course this only works on a side-mount antenna; if yours is mounted at the top of a tower you can't use this accessory. Another common failure of these antennas: the capacitors at the bottom give up easily when there's a nearby lightning strike. The values may not be easy to get. Bob M. == --- On Wed, 11/12/08, Gmail - Kevin, Natalia, Stacey Rochelle [EMAIL PROTECTED] wrote: From: Gmail - Kevin, Natalia, Stacey Rochelle [EMAIL PROTECTED] Subject: [Repeater-Builder] Diamond X510 Failure To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 12, 2008, 4:31 AM HI All, After 15 years of faithful service our Diamond X510 dual-band RX antenna has failed. We started getting some noise and poor signal input to the 2mtr repeater. We had decided to check the 2x X510 antennas (1x TX and 1x RX). A couple of weeks ago the TX was checked and found to still be in fairly good condition, we did however solder the crimp joints. Today we pulled the top antenna down which runs the 2mtr RX and the 70cm repeater. Once we opened the antenna we found that it had come apart just above the bottom joint, and the very top of the element was split. Now we know why the RX had turned bad. No recovery for this antenna. We want to replace it with something that can be used for the 2mtr and 70cm repeaters. So far other then the antenna dual-band antennas there is nothing to replace it with from a commercial type. But maybe there is something that could be used? There is a thought that maybe due to the lenght of the antenna and the winds we get up on the hill this has added to the damage. We are thinking to replace it with a Diamond X300 dual-band, a third shorter and a little less gain. Any thoughts on a replacement would be helpful, I will pass it onto the other trustees. Regards and Thanks for reading this email. Kevin, ZL1KFM. Owner/Trustee.
Re: [Repeater-Builder] 8924c duplexer setup
At 05:48 AM 11/12/08, you wrote: Hi all, New to testing anything with this type of equip Just got a Agilent 8924c and have read over the setup docs but I need actual setup instructions for adjusting duplexer cans. Does anyone have a step by step instruction guide they could send me so I could learn how to use this new equipment. Instuctions need to be specific to Agilent 8920 or 8924c. Frank A 20 second Google search on Agilent Manuals found: http://www.home.agilent.com/agilent/facet.jspx;jsessionid=1A652D43ABA8052FA80B89F46A4C0ED5.jboss1?t=80039.k.1co=152502.i.0cc=USlc=engsm=g Then typing 8924c into the model box found this: http://www.home.agilent.com/agilent/techSupport.jspx?pid=102362%3Aepsg%3ApropageMode=MNcc=USlc=eng There are 6 downloadable manuals - three Reference Guides, 2 users manuals and a service manual. Mike WA6ILQ
RE: [Repeater-Builder] 8924c duplexer setup
Frank, I don't think you'll find a specific instruction for these models and not sure exactly your starting point so first set up cables like this. http://www.repeater-builder.com/wacom/wp678-665-uhf-tuninginstructions.pdf its best to terminate all 3 ports of the duplexer with 3 or 6 db pads then hook up your best cables, terminate the open port in the first drawing with a 50 ohm load also. So if you're connected to the ant port and high pass of duplexer with the 8924c, terminate the low pass with a dummy. on your 8924c hook the ant port to the ant port on the duplexer and the duplex port of 8924c to the pass of duplexer you want to test. Get the S/A started and change the port it is monitoring to the ant port and also to the gen port to duplex also change the gen to tracking if I remember correct. You will want to change the range down to 10 or 20 megs wide, you can bring that down after rough tuning. Its best to check the specification and condition as is before you retune. Also there is a neat screen capture program available for the 89## series, look in the file section of this yahoo group. You can press the print pad on the 8924 and have a bmp sent to your laptop. 73 Don Kirchner W5DK From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Private Sent: Wednesday, November 12, 2008 7:49 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] 8924c duplexer setup Hi all, New to testing anything with this type of equip Just got a Agilent 8924c and have read over the setup docs but I need actual setup instructions for adjusting duplexer cans. Does anyone have a step by step instruction guide they could send me so I could learn how to use this new equipment. Instuctions need to be specific to Agilent 8920 or 8924c. Frank
Re: [Repeater-Builder] Re: 8924c duplexer setup
Attach 2 cables to 'Duplex Out' and 'Antenna In' Attach the ends of the cables to the duplexer, Duplex out to 'Antenna' and Antenna In either side. Terminate the opposite side of the duplexer with a 50 ohm dummy load. Select the Spec Analyzer. Set center range to the first desired tuning frequency. If a BpBr type duplexer I will do the pass frequency, if notch only than I set the notch frequency. Set division to 1 MHz (10 MHz Span) if VHF or 2 MHz (20 MHz Span) for UHF. Set input to 'Antenna In' Select the generator menu Select generator output to 'Duplex Out' Select generator type to sweep Select generator output level to 0dB or +10dB Tune duplexer for desired pass and reject. Select ref level and take down to -50dB for deep notches. If notches are extra deep set generator output to +18dB Change center frequencies and swap cables and do the opposite side of the duplexer. On Wed, Nov 12, 2008 at 1:40 PM, Private [EMAIL PROTECTED] wrote: --- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: At 05:48 AM 11/12/08, you wrote: Hi all, New to testing anything with this type of equip Just got a Agilent 8924c and have read over the setup docs but I need actual setup instructions for adjusting duplexer cans. Does anyone have a step by step instruction guide they could send me so I could learn how to use this new equipment. Instuctions need to be specific to Agilent 8920 or 8924c. Frank A 20 second Google search on Agilent Manuals found: http://www.home.agilent.com/agilent/facet.jspx;jsessionid=1A652D43ABA 8052FA80B89F46A4C0ED5.jboss1? t=80039.k.1co=152502.i.0cc=USlc=engsm=g Then typing 8924c into the model box found this: http://www.home.agilent.com/agilent/techSupport.jspx? pid=102362%3Aepsg%3ApropageMode=MNcc=USlc=eng There are 6 downloadable manuals - three Reference Guides, 2 users manuals and a service manual. Mike WA6ILQ Like I said, Im new to testing procedures with this type of unit, yes Ive done the 20second search in my situation it took 5seconds to findallthe manuals, however good those manuals are they dont get very specific to testing duplexers,like Isaid im a novice at this so all the manuals we can find searchingthe agilent site arenot going to do any goood unless I can find someone who has some patience with someone who has no experience and has already dealt with this type/pieceof equipment.but thanks anyway! Yahoo! Groups Links
[Repeater-Builder] Re: 8924c duplexer setup
--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ [EMAIL PROTECTED] wrote: At 05:48 AM 11/12/08, you wrote: Hi all, New to testing anything with this type of equip Just got a Agilent 8924c and have read over the setup docs but I need actual setup instructions for adjusting duplexer cans. Does anyone have a step by step instruction guide they could send me so I could learn how to use this new equipment. Instuctions need to be specific to Agilent 8920 or 8924c. Frank A 20 second Google search on Agilent Manuals found: http://www.home.agilent.com/agilent/facet.jspx;jsessionid=1A652D43ABA 8052FA80B89F46A4C0ED5.jboss1? t=80039.k.1co=152502.i.0cc=USlc=engsm=g Then typing 8924c into the model box found this: http://www.home.agilent.com/agilent/techSupport.jspx? pid=102362%3Aepsg%3ApropageMode=MNcc=USlc=eng There are 6 downloadable manuals - three Reference Guides, 2 users manuals and a service manual. Mike WA6ILQ Like I said, Im new to testing procedures with this type of unit, yes Ive done the 20second search in my situation it took 5seconds to findallthe manuals, however good those manuals are they dont get very specific to testing duplexers,like Isaid im a novice at this so all the manuals we can find searchingthe agilent site arenot going to do any goood unless I can find someone who has some patience with someone who has no experience and has already dealt with this type/pieceof equipment.but thanks anyway!
Re: [Repeater-Builder] Re: Motorola transistors
Hi-Might give RF parts a call. They have a lot of Moto stuff.w8kq --- On Tue, 11/11/08, w8rw [EMAIL PROTECTED] wrote: From: w8rw [EMAIL PROTECTED] Subject: [Repeater-Builder] Re: Motorola transistors To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 11, 2008, 8:09 AM --- In Repeater-Builder@ yahoogroups. com, Ian Miller [EMAIL PROTECTED] wrote: Does anyone have any specs on Motorola transistors M1106 and M1107? - I would need their operating frequency. Nothing found on Google. Thanks Ian VA2IR Those look like Motorola house numbers...for internal use. What are the parts used in?
[Repeater-Builder] 8924c duplexer setup
Hi all, New to testing anything with this type of equip Just got a Agilent 8924c and have read over the setup docs but I need actual setup instructions for adjusting duplexer cans. Does anyone have a step by step instruction guide they could send me so I could learn how to use this new equipment. Instuctions need to be specific to Agilent 8920 or 8924c. Frank
[Repeater-Builder] Mastr II UHF FM exciter question
Hello all I am assembling a Mastr II UHF station into a repeater and have acquired a real FM exciter and crystal for it. I'm having trouble deciding from documents if I should feed it flat or de-emphasized audio? My best guess is that GE designed this so the FM exciter takes the same Mic Hi input that the regular exciter takes, which means it has pre-emphasis circuitry on board. If that is the case, does anybody know off hand if there's a convenient place to inject flat audio? I would prefer to run flat audio through the system if possible but I'm not very knowledgable about the GE exciters. Thank you all Mark Hagler KK7U
RE: [Repeater-Builder] Motorola transistors
Ian, The Motorola catalog lists M1106 and M1107 transistors as special and without any technical specifications. It probably won't change your desire to find out what their specs are, but you can still buy them from Motorola Parts- at very high prices: M1106 is Part Number 4884411L06, $ 133.88 each M1107 is Part Number 4884411L07, $ 84.12 each 73, Eric Lemmon WB6FLY --- On Mon, 11/10/08, Ian Miller [EMAIL PROTECTED] mailto:va2ir%40securenet.net wrote: From: Ian Miller [EMAIL PROTECTED] mailto:va2ir%40securenet.net Subject: [Repeater-Builder] Motorola transistors To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Date: Monday, November 10, 2008, 6:13 PM Does anyone have any specs on Motorola transistors M1106 and M1107? - I would need their operating frequency. Nothing found on Google. Thanks Ian VA2IR Yahoo! Groups Links
[Repeater-Builder] isolator
Hi all, I have aquired a EMR Isolator, model 7450/4 for 150-170 Mhz and tuned to 155 MHz. It has 3 tuning adjustments so need to retune it. Can anyone give info as to how to tune it or where I can get info. EMR has good info on what it does and how it works, but found nothing at their site on tuning. Tune for low SWR, max power out, min smoke, etc??? 73, ron, n9ee/r
[Repeater-Builder] Re: Mastr II UHF FM exciter question
--- In Repeater-Builder@yahoogroups.com, kk7u_seattle [EMAIL PROTECTED] wrote: Hello all I am assembling a Mastr II UHF station into a repeater and have acquired a real FM exciter and crystal for it. I'm having trouble deciding from documents if I should feed it flat or de-emphasized audio? My best guess is that GE designed this so the FM exciter takes the same Mic Hi input that the regular exciter takes, which means it has pre-emphasis circuitry on board. If that is the case, does anybody know off hand if there's a convenient place to inject flat audio? I would prefer to run flat audio through the system if possible but I'm not very knowledgable about the GE exciters. Thank you all Mark Hagler KK7U The general consensus with phase modulated rigs is to use discriminator audio thru the controller then into the exciter. the initiating transmitter (into the rptr rcvr) already preemphasized audio, this then is de-emph in the final recvr (after being transmitter from the repeater). Transmitters that employ a true FM modulator require a pre#8209;emphasis circuit before the modulator; the true FM modulator doesn't automatically pre-emphasize the audio like a transmitter that uses a phase modulator. here's a good article to read: http://www.repeater-builder.com/tech-info/flataudio.html
RE: [Repeater-Builder] isolator
Ron, Contact EMR and request a copy of the bulletin, Field Tuning of Isolators. Be aware that typical circulators and isolators can be field-tuned perhaps +/- 2% from the frequency for which they were made. If you want to use it at a new frequency that is more than 3 or 4 MHz away, it probably will need to be remanufactured at about 1/3 to 1/2 the cost of a new unit. You should use a vector network analyzer, or at least a spectrum analyzer with tracking generator and a return-loss bridge, to properly tune a circulator or isolator. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Ron Wright Sent: Wednesday, November 12, 2008 8:01 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] isolator Hi all, I have aquired a EMR Isolator, model 7450/4 for 150-170 Mhz and tuned to 155 MHz. It has 3 tuning adjustments so need to retune it. Can anyone give info as to how to tune it or where I can get info. EMR has good info on what it does and how it works, but found nothing at their site on tuning. Tune for low SWR, max power out, min smoke, etc??? 73, ron, n9ee/r
[Repeater-Builder] Re: isolator
Its all spelled out here: http://www.repeater-builder.com/antenna/care-and-feeding-of-the-rf-isolator.pdf --- In Repeater-Builder@yahoogroups.com, Ron Wright [EMAIL PROTECTED] wrote: Hi all, I have aquired a EMR Isolator, model 7450/4 for 150-170 Mhz and tuned to 155 MHz. It has 3 tuning adjustments so need to retune it. Can anyone give info as to how to tune it or where I can get info. EMR has good info on what it does and how it works, but found nothing at their site on tuning. Tune for low SWR, max power out, min smoke, etc??? 73, ron, n9ee/r
RE: [Repeater-Builder] isolator
Ron, A simple but effective method of tuning a single junction isolator (3 tuning ports) can be done by using a few basic steps. First tune the input and output trimmers (usually found on the lower part of the isolator opposite the attached dummy load) for maximum power through the devise. To do this, connect a high power 2 meter mobile (set to the frequency you want to tune up the isolator on) to the input port. Connect your watt meter and dummy load to the output port. Key the radio and tune for max output. Next reverse your power source (2 meter mobile rig) and transmit into the output port of the isolator with your watt meter and dummy load connected to the input port. Tune the third trimmer cap (nearest to the isolators dummy load) for MINIMUM a reading on your watt meter. You're really going to have to get up close and personal with your watt meter because at this point because there wont be a lot of power there to deflect the meter. If your meter has a SWR / Calabration setting, you may need to run the SWR calibration knob all the way to the max just to get meter deflection. Tune for a MINIMUM meter reading. You are wanting as much power as possible going into the dummy load in this step. IMPORTANT: Ohm out your dummy load to be sure it is 50 ohms before you start the tuning procedure. Loads can overheated and change in value. Also, because a isolator is a ferro-resonate device, be sure to do all your tuning (and mounting) on a NON-magnetic surface. Lastly, when it comes time to install the isolator, place your watt meter in line on the input port of the isolator. While keying the transmitter, tweak the input trimmer for a MINIMUM SWR reading on your meter. At this point, you should be good to go. Now, was that as precise as using a tracking generator, spectrum analyzer and return loss bridge? Perhaps not, but it will be darn close. However, if you had a dual junction isolator that needed tuning, that's a whole different story! :) Give me a call if you get stuck and I'll be glad to walk you through the procedure. 73, Steve Allred / K6SCA RF System Engineer 209-948-9611 --- On Wed, 11/12/08, Eric Lemmon [EMAIL PROTECTED] wrote: From: Eric Lemmon [EMAIL PROTECTED] Subject: RE: [Repeater-Builder] isolator To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 12, 2008, 8:20 PM Ron, Contact EMR and request a copy of the bulletin, Field Tuning of Isolators. Be aware that typical circulators and isolators can be field-tuned perhaps +/- 2% from the frequency for which they were made. If you want to use it at a new frequency that is more than 3 or 4 MHz away, it probably will need to be remanufactured at about 1/3 to 1/2 the cost of a new unit. You should use a vector network analyzer, or at least a spectrum analyzer with tracking generator and a return-loss bridge, to properly tune a circulator or isolator. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of Ron Wright Sent: Wednesday, November 12, 2008 8:01 PM To: Repeater-Builder@ yahoogroups. com Subject: [Repeater-Builder] isolator Hi all, I have aquired a EMR Isolator, model 7450/4 for 150-170 Mhz and tuned to 155 MHz. It has 3 tuning adjustments so need to retune it. Can anyone give info as to how to tune it or where I can get info. EMR has good info on what it does and how it works, but found nothing at their site on tuning. Tune for low SWR, max power out, min smoke, etc??? 73, ron, n9ee/r
