Re: [Repeater-Builder] GM-300 Repeater (was 900mhz , DTR, 906 to 923.75 MHz FHSS)
Andre, I am not that familiar with Motorola products, but I understand that a number of different radios have a standard 16 pin connector for external interface, and that the connector pin functions for most of these radios are the same. I have no idea if the handheld radios you mention have this connector, but I doubt it, since the connectors are pretty large to be able to fit on a talkie. 73 - Jim W5ZIT --- On Tue, 11/18/08, ANDRE [EMAIL PROTECTED] wrote: From: ANDRE [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] GM-300 Repeater (was 900mhz , DTR, 906 to 923.75 MHz FHSS) To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 18, 2008, 6:56 AM Jim, But it will work on the Motorola DTR (digital) FHSS handheld? I am worry about the FHSS. Thanks - Original Message - From: Jim Brown To: Repeater-Builder@ yahoogroups. com Sent: Tuesday, November 18, 2008 1:19 AM Subject: Re: [Repeater-Builder] GM-300 Repeater (was 900mhz , DTR, 906 to 923.75 MHz FHSS) Andre, a pair of Motorola GM-300 radios can be interconnected as a repeater using a cable available on eBay for about 10 USD. I have used two radios set up like this, one as the receive and the other as the transmit and they worked just fine as a repeater. No squelch tail on the simple cable, but no problem getting them to work. The cable has a pot to set the repeated deviation, and that is the only adjustment required. 73 - Jim W5ZIT --- On Mon, 11/17/08, ANDRE [EMAIL PROTECTED] com.br wrote: From: ANDRE [EMAIL PROTECTED] com.br Subject: Re: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS To: Repeater-Builder@ yahoogroups. com Date: Monday, November 17, 2008, 6:56 AM Benjamin, Do you know any brand, model? Thanks
Re: [Repeater-Builder] 450-460mhz Repeater Co-Channel Interference
For some PL decoders, a weak noisy signal will trigger the PL detect and let the signal through. On the other hand, if the co-channel signal happens to be using the same PL tone, it will get through also. A good PL decoder like the TS-64 will rarely false. I have a repeater configured so that either a quiet (20 dB quieting on a SINAD meter) or the correct PL tone will trigger the repeater. I tell users that if they are having problems holding the repeater to use the PL tone to extend their receive range. The PL decoder in my Zetron 38As will detect the tone and key the repeater when nothing but noise is heard on the output. I have to combine the PL with the COS to get normal operation from this setup. If you are using one of the older PL decoders such as one normally used in a mobile radio, I would suggest changing to a better decoder, like the TS-64. It will also encode and decode at the same time, saving having to install a separate encoder in a repeater. 73 - Jim W5ZIT --- On Tue, 11/18/08, ptt_pupil [EMAIL PROTECTED] wrote: From: ptt_pupil [EMAIL PROTECTED] Subject: [Repeater-Builder] 450-460mhz Repeater Co-Channel Interference To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 18, 2008, 12:30 PM Can anyone tell me if there are ANY fixes for co-channel interference? What is the use of a PL tone if it isn't able to block out the co- channel users? Is it because the co-channel user is transmitting with more power and is able to break the PL tone? What are the expectations of a PL tone? When does it work and when does it not work? Are there other devices that can help all? Thanks in advance! ,_._,___
Re: [Repeater-Builder] Sinclair q202gc duplexers
Jason, if your duplexer is one of the older units using a dielectric rod to tune the notch, here is the manual: http://www.repeater-builder.com/sinclair/q202-208-218-tuning.pdf I have moved four of these duplexers down into the ham band by changing out the cable that goes from the cavity to the Tee from the old 10.5 inch dimension to new cables measuring 12.5 inches. The cavity tuned down from 170 mHz to the ham band just fine, but the notch would not work until I changed the cable dimensions. My duplexers were all cabled with RG-213 from the factory and I used RG-214 to replace the cables. I did not replace any of the other RG-213 cables in the harness. 73 - Jim W5ZIT --- On Fri, 11/21/08, kc7stw [EMAIL PROTECTED] wrote: From: kc7stw [EMAIL PROTECTED] Subject: [Repeater-Builder] Sinclair q202gc duplexers To: Repeater-Builder@yahoogroups.com Date: Friday, November 21, 2008, 10:03 PM I am new to the sinclair line of duplexers. I have a set of used vhf duplexers setup in the high vhf range. current freqs are 165.2375 and 165.1375. Has anyone had luck changing the coax harness to the longer 36cm and getting the duplexers to tune down to the two meter band? Thanks -Jason ,_._,___
[Repeater-Builder] 900 Duplexer
I am trying to decide on a duplexer for a 900Mhz portable repeater made from a pair of Maxtracs. I have found several on eBay that seem suitable, but if any of the guru's on here have input I would appreciate hearing your thoughts since I'm not usre which to choose. These are the ones I'm looking at http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=250327529615ssPageName=STRK:MEWA:ITih=015 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=310101567541ssPageName=STRK:MEWA:ITih=021 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=250315811678ssPageName=STRK:MEWA:ITih=015 Thanks and 73, Dan N8DJP
Re: [Repeater-Builder] 450-460mhz Repeater Co-Channel Interference
You left us with very little information about the problem. I'll make the assumption that the co-channel signal is relatively distant and weak. Assuming that the co-channel signal is not transmitting the same tone that you are using, your receiver should not open. If your receiver is opening, and you are sure that the distant station is not transmitting the same tone, you either have a faulty decoder or it is configured incorrectly (often the hookswitch will be to blame for inexperienced users). If you are a commercial user, there should be a microphone hookswitch. When you remove the microphone from the hookswitch, the decoder allows any signal to get through until the microphone is hung up again. Now, if the interfering signal is very strong, then it will capture your receiver and block weaker signals from getting through. Chuck WB2EDV - Original Message - From: ptt_pupil [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, November 18, 2008 1:30 PM Subject: [Repeater-Builder] 450-460mhz Repeater Co-Channel Interference Can anyone tell me if there are ANY fixes for co-channel interference? What is the use of a PL tone if it isn't able to block out the co- channel users? Is it because the co-channel user is transmitting with more power and is able to break the PL tone? What are the expectations of a PL tone? When does it work and when does it not work? Are there other devices that can help all? Thanks in advance!
Re: [Repeater-Builder] Need SWR meter recomendation
The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW In a message dated 11/23/2008 12:53:06 A.M. Central Standard Time, [EMAIL PROTECTED] writes: Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter's output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR - Original Message - From: _Albert_ (mailto:[EMAIL PROTECTED]) To: [EMAIL PROTECTED] (mailto:Repeater-Builder@yahoogroups.com) Sent: Saturday, November 22, 2008 10:59 PM Subject: [Repeater-Builder] Need SWR meter recomendation Hey Everyone, I know there is a mix of Hams and commercial guys here so I want to ask all of you about SWR meters. I am a beginning ham and would like to build some VHF and UHF antennas. I am also on a budget. (Isn't everyone these days) I need a decent SWR meter for VHF and UHF use. I don't want a cheap piece of crap, and I can't afford top of the line either. What do you all think of the MFJ products? Other suggestions? Thanks **Check out smokin’ hot deals on laptops, desktops and more from Dell. Shop Deals (http://pr.atwola.com/promoclk/10075x1213345834x1200842686/aol?redir=http://ad.doubleclick.net/clk;209513277;31396581;l)
Re: [Repeater-Builder] Need SWR meter recomendation
Bill, Kudos to MFJ, then! Many bigger-name manufacturers never fix their bugs. I have a Yaesu FT-50R which has this same issue. The power switch is a front panel momentary-contact software switch. It takes only a quick bump to turn it on, but you have to hold it in for 500 ms to turn it back off. This pretty much guarantees that it will come on and stay on if jostled. If they'd recessd that switch, or even simply required holding for 500 ms to turn the radio on, it probably would never have been a problem. 73, Paul, AE4KR - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 8:21 AM Subject: Re: [Repeater-Builder] Need SWR meter recomendation The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW ...You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries downRecent Activity a.. 12New Members Visit Your Group Sell Online Start selling with our award-winning e-commerce tools. Moderator Central Get answers to your questions about running Y! Groups. All-Bran Day 10 Club on Yahoo! Groups Feel better with fiber. .
RE: [Repeater-Builder] Sinclair q202gc duplexers
Hi all if i may add, we did retune a set of Q202 from the 152 + mhz to the ham band whitout working on the cable, we tried it and it when no1 maybe he should ry it first and see what happen sugestion!! 73/s gervais ve2ckn To: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Sun, 23 Nov 2008 04:29:22 -0800Subject: Re: [Repeater-Builder] Sinclair q202gc duplexers Jason, if your duplexer is one of the older units using a dielectric rod to tune the notch, here is the manual:http://www.repeater-builder.com/sinclair/q202-208-218-tuning.pdfI have moved four of these duplexers down into the ham band by changing out the cable that goes from the cavity to the Tee from the old 10.5 inch dimension to new cables measuring 12.5 inches. The cavity tuned down from 170 mHz to the ham band just fine, but the notch would not work until I changed the cable dimensions.My duplexers were all cabled with RG-213 from the factory and I used RG-214 to replace the cables. I did not replace any of the other RG-213 cables in the harness.73 - Jim W5ZIT--- On Fri, 11/21/08, kc7stw [EMAIL PROTECTED] wrote: From: kc7stw [EMAIL PROTECTED]Subject: [Repeater-Builder] Sinclair q202gc duplexersTo: [EMAIL PROTECTED]: Friday, November 21, 2008, 10:03 PM I am new to the sinclair line of duplexers. I have a set of used vhf duplexers setup in the high vhf range. current freqs are 165.2375 and 165.1375. Has anyone had luck changing the coax harness to the longer 36cm and getting the duplexers to tune down to the two meter band?Thanks-Jason ,_._,___ _
[Repeater-Builder] Kenwood TKR-750 850
Kenwood TKR-750-850 series repeaters. I know a lot of us out here have these repeaters and some of us pay on a rack space basis. Well here is some good news for all of us. I am taking my front panel to a laser jet shop and add for a second slot on the Left side where a power supply could go and make it for another repeater module. I will post the pictures when it is finished for the group to look at. I am going to have them do a cad drawing and keep it non disk for future panels that can be had. I have seen this done with an agency in Oregon but was a crude and not factory looking so I will make the provisions to make it look factory. Stay tuned. Mike K7PFJ Colorado Telecom, L.L.C Mike Mullarkey 6886 Sage Ave Firestone, Co 80504 303-954-9695 Home 303-954-9693 Home Office Fax 303-718-8052 Cellular
[Repeater-Builder] Wanted 1 single cavity for a Wacom Wp-678
Does anyone have a single cavity for a Wacom WP678 that they would like to sell? If so, please eith e-mail direct or simply call... Len [EMAIL PROTECTED] 518-653-1287
RE: [Repeater-Builder] Need SWR meter recommendation
Paul, You may have an early version of the MFJ-259. My MFJ-259B has a battery access plate on the back that is held with just two screws. I agree with your comment about the power switch, so I simply pulled off the button cap with pliers. The stem of the switch is now recessed below the panel face, and can be easily operated with a pencil or key, but not accidentally. I wish I had done this long ago! This is my third unit; I returned the first two for exchange just days after receiving them. On the first unit, the threads of the SO-239 jack were not cut properly, and a PL-259 plug would not fully engage. The second unit simply stopped working. The third and present unit works just fine, and I've had it for at least four years now. It is the Yugo of SWR meters, but it's cheap and it works adequately. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Plack Sent: Saturday, November 22, 2008 10:53 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Need SWR meter recommendation Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter's output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR - Original Message - From: Albert mailto:[EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com Sent: Saturday, November 22, 2008 10:59 PM Subject: [Repeater-Builder] Need SWR meter recommendation Hey Everyone, I know there is a mix of Hams and commercial guys here so I want to ask all of you about SWR meters. I am a beginning ham and would like to build some VHF and UHF antennas. I am also on a budget. (Isn't everyone these days) I need a decent SWR meter for VHF and UHF use. I don't want a cheap piece of crap, and I can't afford top of the line either. What do you all think of the MFJ products? Other suggestions? Thanks
Re: [Repeater-Builder] Need SWR meter recommendation
On to the SWR meter part. I am a ham. Not a commercial operator. I spent years with various diamond, comet, mfj, etc. SWR/Wattmeters. After 20 years, I finally decided enough was enough. Two months ago I turned $500 into a Telewave 44AP at the Chuck Martin RF shop and now wish I'd just sucked it up and done that 20 years ago :) On Nov 23, 2008, at 10:13 AM, Eric Lemmon wrote: Paul, You may have an early version of the MFJ-259. My MFJ-259B has a battery access plate on the back that is held with just two screws. I agree with your comment about the power switch, so I simply pulled off the button cap with pliers. The stem of the switch is now recessed below the panel face, and can be easily operated with a pencil or key, but not accidentally. I wish I had done this long ago! This is my third unit; I returned the first two for exchange just days after receiving them. On the first unit, the threads of the SO-239 jack were not cut properly, and a PL-259 plug would not fully engage. The second unit simply stopped working. The third and present unit works just fine, and I've had it for at least four years now. It is the Yugo of SWR meters, but it's cheap and it works adequately. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Plack Sent: Saturday, November 22, 2008 10:53 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Need SWR meter recommendation Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/ UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter's output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR - Original Message - From: Albert mailto:[EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com Sent: Saturday, November 22, 2008 10:59 PM Subject: [Repeater-Builder] Need SWR meter recommendation Hey Everyone, I know there is a mix of Hams and commercial guys here so I want to ask all of you about SWR meters. I am a beginning ham and would like to build some VHF and UHF antennas. I am also on a budget. (Isn't everyone these days) I need a decent SWR meter for VHF and UHF use. I don't want a cheap piece of crap, and I can't afford top of the line either. What do you all think of the MFJ products? Other suggestions? Thanks -- Cort Buffington H: +1-785-838-3034 M: +1-785-865-7206
RE: [Repeater-Builder] Need SWR meter recomendation
Albert, If what you want is an SWR meter - *and nothing else* - you can't beat a Bird 43. They can be found used all the time on a popular auction site (in various levels of condition). In fact, I picked up a Bird 4410 (the multi-range meter) at a great price, and haven't looked back. Yes, the slugs can be on the expensive side, but 43 slugs can be found at most hamfests, too. (Not like for the 4410, which are VERY expensive and not as plentiful. Oh well.) Having said all that, you say you're interested in BUILDING antennas - you'll need an analyzer to do that. I have no experience personally with the MFJ line of meters, but have seen nothing but glowing reports on them. In fact, one ham local to me absolutely loves his meter. The only problem I see with the MJF meters are they are limited to lower UHF (nothing about 460 for the most part) so working at 900 MHz and above will definitely be a problem. My buddy is finding that out now, as he is trying to build/tune antennas for use on my 900 machine. Another option is the VNA's (Vector Network Analyzer) that are offered in such places as the back pages of QST, etc. These work via your computer (either USB or some other connection) and are coming down in price. Do your research (including asking the collective knowledge base here, as you have) and then make your informed decision as to what to buy. Good luck! 73 de Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Albert Sent: Saturday, November 22, 2008 11:59 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Need SWR meter recomendation Hey Everyone, I know there is a mix of Hams and commercial guys here so I want to ask all of you about SWR meters. I am a beginning ham and would like to build some VHF and UHF antennas. I am also on a budget. (Isn't everyone these days) I need a decent SWR meter for VHF and UHF use. I don't want a cheap piece of crap, and I can't afford top of the line either. What do you all think of the MFJ products? Other suggestions? Thanks Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1807 - Release Date: 11/23/2008 10:59 AM
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
I no longer have any Spectrum documentation but I do have a collection of original boards for the SCR-1000 that I'll be glad to send you if you think you can make use of them in restoring it. Bruce K7IJ In a message dated 11/22/2008 9:13:55 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL **One site has it all. Your email accounts, your social networks, and the things you love. Try the new AOL.com today!(http://pr.atwola.com/promoclk/10075x1212962939x1200825291/aol?redir=http://www.aol.com/?optin=new-dp %26icid=aolcom40vanity%26ncid=emlcntaolcom0001)
RE: [Repeater-Builder] Do they make a mobile duplexer like this?
I have an in-band repeater in VHF High that does not use cans and is a couple of megs apart, but I had to use two antennas and separate them as far as I could. The output of the repeater to handhelds was only 500 millawatts. I can only say that two antennas may help some. Randy From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Peter Summerhawk Sent: Sunday, November 23, 2008 2:32 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Do they make a mobile duplexer like this? Morning crew, Been looking for a duplexer that will do the 0.600 split for a mobile repeater. Space is a big consideration for this project. If anyone has any suggestions please email me and let me know. Thanks Peter Summerhawk
[Repeater-Builder] Micor RX IF filters
I recently acquired a UHF Micor mobile that had crystals for several 460 MHz splinter channels installed. Did Motorola make special 12.5 kHz IF filters for these radios? The IF filters in this radio are stamped with part #s 84755E01, 84755E02 84755E03. Thanks. Bob NO6B
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
Jim, The attachment can't be openedmaybe you sould re-send it...? 73 John VE3AMZ - Original Message - From: Jim Brown To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 1:07 PM Subject: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Her are some interesting comments on the MFJ SWR analyzers that were published in QST. I hope the attached file is not too large for download. 73 - Jim W5ZIT --- On Sun, 11/23/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Need SWR meter recomendation To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 9:21 AM The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW In a message dated 11/23/2008 12:53:06 A.M. Central Standard Time, [EMAIL PROTECTED] com writes: Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter' s output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR
RE: [Repeater-Builder] Micor RX IF filters
Bob, Those filters are the standard 16K0F3E filters, for 25 kHz channels. The most recent UHF Micor manual notes that part numbers 4884755E01, E02, and E03 can all be replaced by 4884755E01. It appears that whoever crystalled that radio took the easy way out, and did not install a narrow-band IF filter kit. To the best of my knowledge, Motorola did not offer such a kit for the Micor, although several aftermarket companies and crystal houses did produce such kits for the Micor and for other radios of that vintage. Communication Specialists offers a Micor narrow-band kit, even today: www.com-spec.com/narrow.htm 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Sunday, November 23, 2008 12:02 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Micor RX IF filters I recently acquired a UHF Micor mobile that had crystals for several 460 MHz splinter channels installed. Did Motorola make special 12.5 kHz IF filters for these radios? The IF filters in this radio are stamped with part #s 84755E01, 84755E02 84755E03. Thanks. Bob NO6B
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open. I don't have the address handy but do A search for Adobe Acrobat Reader Download. I will bet you will be OK then. Bruce KE5TPN - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 2:05 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Jim, The attachment can't be openedmaybe you sould re-send it...? 73 John VE3AMZ - Original Message - From: Jim Brown To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 1:07 PM Subject: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Her are some interesting comments on the MFJ SWR analyzers that were published in QST. I hope the attached file is not too large for download. 73 - Jim W5ZIT --- On Sun, 11/23/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Need SWR meter recomendation To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 9:21 AM The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW In a message dated 11/23/2008 12:53:06 A.M. Central Standard Time, [EMAIL PROTECTED] com writes: Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter' s output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
http://www.adobe.com/downloads/ - Original Message - From: Bruce Bagwell To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 2:53 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open. I don't have the address handy but do A search for Adobe Acrobat Reader Download. I will bet you will be OK then. Bruce KE5TPN -- -- - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 2:05 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Jim, The attachment can't be openedmaybe you sould re-send it...? 73 John VE3AMZ - Original Message - From: Jim Brown To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 1:07 PM Subject: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Her are some interesting comments on the MFJ SWR analyzers that were published in QST. I hope the attached file is not too large for download. 73 - Jim W5ZIT --- On Sun, 11/23/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Need SWR meter recomendation To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 9:21 AM The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW In a message dated 11/23/2008 12:53:06 A.M. Central Standard Time, [EMAIL PROTECTED] com writes: Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter' s output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR -- Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1807 - Release Date: 11/23/2008 10:59 AM
[Repeater-Builder] FS: CES 5200 (qty=2)
Hi all, I've got two CES 5200 pulled from a working system. If anyone has a need for them, please email me directly. - Rob
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
Didn't work for me either. It indicated that the file was damaged when Adobe tried to open it. Chuck WB2EDV - Original Message - From: Bruce Bagwell To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 3:53 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open.
RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
The file in question likely requires a later version of Adobe Reader than what is being used by those having problems. Simply download the latest version of Reader, and it will work just fine. I have Adobe Acrobat 7.0, and it opened the file with no errors. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Kelsey Sent: Sunday, November 23, 2008 1:00 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Didn't work for me either. It indicated that the file was damaged when Adobe tried to open it. Chuck WB2EDV - Original Message - From: Bruce Bagwell To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Sunday, November 23, 2008 3:53 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open.
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
I also have Acrobat 7, but it didn't like the file. Chuck - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 4:54 PM Subject: RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) The file in question likely requires a later version of Adobe Reader than what is being used by those having problems. Simply download the latest version of Reader, and it will work just fine. I have Adobe Acrobat 7.0, and it opened the file with no errors. 73, Eric Lemmon WB6FLY
Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
Bruce - Yours worked fine as did one that Eric sent direct. Must be Yahoo corrupted the original I received. Chuck WB2EDV - Original Message - From: Bruce Bagwell To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 5:09 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) OK, what the Hay! I have Adobe Reader 8.1.2 Worked just fine for me. I will forward the attachment from my end in hopes it makes it across the Net Bruce KE5TPN -- --
RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
--- On Sun, 11/23/08, Eric Lemmon [EMAIL PROTECTED] wrote: From: Eric Lemmon [EMAIL PROTECTED] Subject: RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 4:54 PM The file in question likely requires a later version of Adobe Reader than what is being used by those having problems. Simply download the latest version of Reader, and it will work just fine. I have Adobe Acrobat 7.0, and it opened the file with no errors. 73, Eric Lemmon WB6FLY It opened fine for me. I am using version 9.0 which I think is one of the later ones.
[Repeater-Builder] Rc-85 connectors.
I have a RC-85 that somebody soldered the wires right to the pins. Does someboyd know the pin size so I can order pins and shells from digikey? Thanks. Sean N0PBA
RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
I was especially interested in the crystal checker. I had never thought about using an analyzer to check the series resonance of a crystal, but I'll bet it works just fine. Going to have to build up a little circuit to couple mine to a crystal through a 50 ohm resistor and get after the crystal stock. 73 - Jim W5ZIT --- On Sun, 11/23/08, Eric Lemmon [EMAIL PROTECTED] wrote: From: Eric Lemmon [EMAIL PROTECTED] Subject: RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 3:54 PM The file in question likely requires a later version of Adobe Reader than what is being used by those having problems. Simply download the latest version of Reader, and it will work just fine. I have Adobe Acrobat 7.0, and it opened the file with no errors. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of Chuck Kelsey Sent: Sunday, November 23, 2008 1:00 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Didn't work for me either. It indicated that the file was damaged when Adobe tried to open it. Chuck WB2EDV - Original Message - From: Bruce Bagwell To: Repeater-Builder@ yahoogroups. com mailto:Repeater- Builder%40yahoog roups.com Sent: Sunday, November 23, 2008 3:53 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open.
RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation)
I was especially interested in the crystal checker. I had never thought about using an analyzer to check the series resonance of a crystal, but I'll bet it works just fine. Going to have to build up a little circuit to couple mine to a crystal through a 50 ohm resistor and get after the crystal stock. 73 - Jim W5ZIT --- On Sun, 11/23/08, Eric Lemmon [EMAIL PROTECTED] wrote: From: Eric Lemmon [EMAIL PROTECTED] Subject: RE: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 3:54 PM The file in question likely requires a later version of Adobe Reader than what is being used by those having problems. Simply download the latest version of Reader, and it will work just fine. I have Adobe Acrobat 7.0, and it opened the file with no errors. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ yahoogroups. com [mailto:Repeater-Builder@ yahoogroups. com] On Behalf Of Chuck Kelsey Sent: Sunday, November 23, 2008 1:00 PM To: Repeater-Builder@ yahoogroups. com Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) Didn't work for me either. It indicated that the file was damaged when Adobe tried to open it. Chuck WB2EDV - Original Message - From: Bruce Bagwell To: Repeater-Builder@ yahoogroups. com mailto:Repeater- Builder%40yahoog roups.com Sent: Sunday, November 23, 2008 3:53 PM Subject: Re: [Repeater-Builder] MFJ Analyzers (was Need SWR meter recomendation) I had no problem with the attachment. You do need Adobe Acrobat Reader to open this. If you do not have Adobe Reader, download it and I bet the attachment will open.
[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
Just for the heck of it I plugged one of my Radio Shack simplex repeater controllers into the DTR-650. The plug is not quite correct(I'll be checking the print) but this will work. I have a set of the DTR-650's on loan testing their functionality. The pair I have has the integral antenna. Can someone tell me what type of antenna connectors the ones with removeable antennas have? Are they SMA like most other Moto's? I imagine with a small PS and a battery eliminator(lighter cord false battery) connected to a kp-20 on a mountain top out here in NV this scheme might work pretty well!!! Just set the units up for group call. 73 Brian nb9e
[Repeater-Builder] Re: 900mhz , DTR, 906 to 923.75 MHz FHSS
I would be carefull in applying an antenna other than a rubber duck. It seems to me these radios fall under a class of non-licensed but having rules specifying no external antennas other than the type it came with. I suspect those rules preclude an antenna connected by coax. I'm not entirely versed in fcc rules nor where this particular radio fits into them but I thought I'd throw this at you as food for thought. --- In Repeater-Builder@yahoogroups.com, Brian R. Chapman [EMAIL PROTECTED] wrote: Just for the heck of it I plugged one of my Radio Shack simplex repeater controllers into the DTR-650. The plug is not quite correct(I'll be checking the print) but this will work. I have a set of the DTR-650's on loan testing their functionality. The pair I have has the integral antenna. Can someone tell me what type of antenna connectors the ones with removeable antennas have? Are they SMA like most other Moto's? I imagine with a small PS and a battery eliminator(lighter cord false battery) connected to a kp-20 on a mountain top out here in NV this scheme might work pretty well!!! Just set the units up for group call. 73 Brian nb9e
[Repeater-Builder] Help: Cushman Service Monitor AC Power Supply
Folks, I need your counsel on repairing a Cushman CE-5100 Service Monitor (similar to CE-50 and CE-5110). The AC power switching supply stopped working (no fuses blown) and I understand that this is a common problem. It functions normally on DC when using an external power supply. Has anyone had experience working on the 90030 AC switching power supply board? I have a partial (~150pp) CE-5100 service manual with schematics, and am wondering about any unusual anomalies or difficult-to-find parts (ie: switcher IC). Not too much info about Cushman (except scooters) on Google. Thanks - Bill N4LG
[Repeater-Builder] re: Need SWR meter recomendation
Working in the 2-way radio field I come across a lot of radios with N conecctors and found a quick solution. On the left side of the SWR meter I have a SO-239 conecctor and on the right side I have an N conecctor. My test cable is RG-142 with a PL-259 on 1 end and a N conecctor on the other end, so I don't have to worry if the radio has UHF or N connectors on them. Craig Kielhofer KEC Communications.
Re: [Repeater-Builder] Sinclair q202gc duplexers
I can't change any of the cables on the harness without cutting or un crimping the n connectors. I do not know the age of the duplexers unless there is a date stamp on them that i don't know about. I sent a email to Sinclair. I got a response from them, they also sent me a different manual on the tuning and installation. In that email I was told to try and tune them down. That they may work, but just not to specs. In this manual it talks about course tuning the notch filter by rotatable loops, then fine tune with the capacitor. My conclusion is to change the harness before I start tuning. Now to find a way to make the harness. Time to start getting good at putting on N's. :) --- On Sun, 11/23/08, Jim Brown [EMAIL PROTECTED] wrote: From: Jim Brown [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Sinclair q202gc duplexers To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 12:29 PM Jason, if your duplexer is one of the older units using a dielectric rod to tune the notch, here is the manual: http://www.repeater -builder. com/sinclair/ q202-208- 218-tuning. pdf I have moved four of these duplexers down into the ham band by changing out the cable that goes from the cavity to the Tee from the old 10.5 inch dimension to new cables measuring 12.5 inches. The cavity tuned down from 170 mHz to the ham band just fine, but the notch would not work until I changed the cable dimensions. My duplexers were all cabled with RG-213 from the factory and I used RG-214 to replace the cables. I did not replace any of the other RG-213 cables in the harness. 73 - Jim W5ZIT --- On Fri, 11/21/08, kc7stw [EMAIL PROTECTED] com wrote: From: kc7stw [EMAIL PROTECTED] com Subject: [Repeater-Builder] Sinclair q202gc duplexers To: Repeater-Builder@ yahoogroups. com Date: Friday, November 21, 2008, 10:03 PM I am new to the sinclair line of duplexers. I have a set of used vhf duplexers setup in the high vhf range. current freqs are 165.2375 and 165.1375. Has anyone had luck changing the coax harness to the longer 36cm and getting the duplexers to tune down to the two meter band? Thanks -Jason ,_._,___
Re: [Repeater-Builder] Sinclair q202gc duplexers
Do you know of a good place to have the cables made? I suck at doing coax and I am sure this needs to be quality. This is my 2 repeater and the first time really dealing with duplexers. The first system the duplexers where wacom and allready tuned. Thanks -Jason --- On Sun, 11/23/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: From: [EMAIL PROTECTED] [EMAIL PROTECTED] Subject: Re: [Repeater-Builder] Sinclair q202gc duplexers To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 5:42 AM At 11/21/2008 20:03, you wrote: I am new to the sinclair line of duplexers. I have a set of used vhf duplexers setup in the high vhf range. current freqs are 165.2375 and 165.1375. Has anyone had luck changing the coax harness to the longer 36cm and getting the duplexers to tune down to the two meter band? Direct answer: yes. To get it to work on 2 meters, the jumpers running from each can to the attached Ts need to be lengthened. Although I got acceptable from the one I had after doing this, for optimum performance all the cables need to be lengthened. Bob NO6B
RE: [Repeater-Builder] Need SWR meter recomendation
If you are looking for a bottom feeding meter that does ok and is cheap, RF Parts has a Diamond SWR and Power Meter that it says is very close to the Bird 43 as far as accuracy. That is what they have listed and not my research. Randy B. W4CPT From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n9wys Sent: Sunday, November 23, 2008 1:08 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Need SWR meter recomendation Albert, If what you want is an SWR meter - *and nothing else* - you can't beat a Bird 43. They can be found used all the time on a popular auction site (in various levels of condition). In fact, I picked up a Bird 4410 (the multi-range meter) at a great price, and haven't looked back. Yes, the slugs can be on the expensive side, but 43 slugs can be found at most hamfests, too. (Not like for the 4410, which are VERY expensive and not as plentiful. Oh well.) Having said all that, you say you're interested in BUILDING antennas - you'll need an analyzer to do that. I have no experience personally with the MFJ line of meters, but have seen nothing but glowing reports on them. In fact, one ham local to me absolutely loves his meter. The only problem I see with the MJF meters are they are limited to lower UHF (nothing about 460 for the most part) so working at 900 MHz and above will definitely be a problem. My buddy is finding that out now, as he is trying to build/tune antennas for use on my 900 machine. Another option is the VNA's (Vector Network Analyzer) that are offered in such places as the back pages of QST, etc. These work via your computer (either USB or some other connection) and are coming down in price. Do your research (including asking the collective knowledge base here, as you have) and then make your informed decision as to what to buy. Good luck! 73 de Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Albert Sent: Saturday, November 22, 2008 11:59 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] Need SWR meter recomendation Hey Everyone, I know there is a mix of Hams and commercial guys here so I want to ask all of you about SWR meters. I am a beginning ham and would like to build some VHF and UHF antennas. I am also on a budget. (Isn't everyone these days) I need a decent SWR meter for VHF and UHF use. I don't want a cheap piece of crap, and I can't afford top of the line either. What do you all think of the MFJ products? Other suggestions? Thanks Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1807 - Release Date: 11/23/2008 10:59 AM
Re: [Repeater-Builder] Sinclair q202gc duplexers
At 10:06 AM 11/23/08, you wrote: I can't change any of the cables on the harness without cutting or un crimping the n connectors. I do not know the age of the duplexers unless there is a date stamp on them that i don't know about. I sent a email to Sinclair. I got a response from them, they also sent me a different manual on the tuning and installation. In that email I was told to try and tune them down. That they may work, but just not to specs. In this manual it talks about course tuning the notch filter by rotatable loops, then fine tune with the capacitor. My conclusion is to change the harness before I start tuning. Now to find a way to make the harness. Time to start getting good at putting on N's. :) I'd start by leaving the existing cables alone, and adding a good quality (Kings or Amphenol) N right angle (elbow) adapter to one or both ends to lengthen it. Or for more length, a M-M and an F-F adapter end to end. Add the stretcher, see how it tunes. Note that I am not suggesting that you use this trick for permanent use, just to see how the hardware reacts. On the other tentacle I do remember hearing about one system that had a Sinclair duplexer that had an elbow on one or both end(s) of each inter-cavity cable. It's been over 15 years since the conversation in question and details fade. When asked the system owner stated that the duplexer was made with two different harnesses, and the difference was just about the length of an elbow. And that adding a few elbows was cheaper than purchasing a whole new harness. And that the unit he had (with the high frequency harness plus the elbows) met all of the factory specs for a unit with the low frequency harness. You can't argue with success. Mike WA6ILQ
