[Repeater-Builder] Bi-directional Amplifer
Good day everybody, For an off-air repeater, we normal use bi-direction amplifier (BDA). A BDA is constructed using two amplifiers for uplink and downlink, interconnected with two duplexers (or circulators) at the front end. In order to prevent the BDA from looping oscillation, the duplexer (circulators) must provide sufficient isolation. We have built such BDA; however, we face the oscillation problem. We are thinking of breaking the BDA into two parts: uplink and downlink. And we amplify uplink and downlink separately. In this way, we need four duplexers (or circulators). Would this method work? Anybody could advise? Best Regards, Kent Chong __ Yahoo! Singapore Answers Real people. Real questions. Real answers. Share what you know at http://answers.yahoo.com.sg
Re: [Repeater-Builder] Bi-directional Amplifer
Kent Chong wrote: Good day everybody, For an off-air repeater, we normal use bi-direction amplifier (BDA). A BDA is constructed using two amplifiers for uplink and downlink, interconnected with two duplexers (or circulators) at the front end. In order to prevent the BDA from looping oscillation, the duplexer (circulators) must provide sufficient isolation. We have built such BDA; however, we face the oscillation problem. We are thinking of breaking the BDA into two parts: uplink and downlink. And we amplify uplink and downlink separately. In this way, we need four duplexers (or circulators). Would this method work? Anybody could advise? If you're having oscillation problems, either there is not enough isolation between the antennas, ie, too close, or the gain of the amps is too high, or a combination of both. Measure the isolation between the two antennas. It should be at least 12 dB MORE then the gain of the BDA. TX-RX and EMR are two major BDA manufacturers, also check out http://www.rfsolutions.com/ There's several cheap BDA companies out there that make junk. If you see a BDA with a price tag of only $1000 or so (new), run away! Also, a good BDA will occupy more space then, say, an external modem, by a factor of at least 10. (Yes, it's bigger then a bread box!) -- Jim Barbour WD8CHL
[Repeater-Builder] Re: Recommendation - Vane Switch
Sad news to read Mike... thanks for the information. I do see the web site on line. CH has been a long time goodie source for me and their catalogs are so well done I keep them around for reference pictures and information. If you see or talk to the owner tell him I/we have enjoyed doing business with him for the last 13 plus years (that I can remember). Wish him our best for a healthy and long retirement. cheers, skipp Mike Morris [EMAIL PROTECTED] wrote: C H Sales AKA C H Surplus is effectively no more. The owner has medical problems, and has decided to retire. After about a year of looking nobody wanted to buy the operation, so he has stopped buying, has slowly emptied the warehouse through the store, has sold the warehouse, and the store contents are selling. As of a week ago last friday the store is over 60% empty. Mike WA6ILQ At 09:14 AM 07/23/07, you wrote: Many vane indicators are of the long arm micro switch type. Easy enough to make your own but you can probably find them through companies like McMaster, CH Sales Company, Grainger (all in Southern California) and many Heating Air Conditioning Supply Stores. A number of possible microswitches can easily be adapted to airflow vane switch applications. CH Sales sells or sold a lot of long arm units and numbers like the MICRO YZ-2RL come to mind as a possible option.
Re: Re: [Repeater-Builder] GE 100 watt PA final transistors
Nope, Sorry. Go fish. HIHI Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 - Original Message - From: Ron Wright [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, July 23, 2007 10:37 PM Subject: Re: Re: [Repeater-Builder] GE 100 watt PA final transistors Scott, Have you got any Exec IIs you want to part with??? 73, ron, n9ee/r From: Scott Zimmerman [EMAIL PROTECTED] Date: 2007/07/23 Mon PM 02:31:29 CDT To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] GE 100 watt PA final transistors Randy, Since you have been struggling with this for a while now, tell me what style VHF PA you currently have (the 3 or 4 transistor final) and I can sell you a complete VHF 110W PA known working for MUCH, MUCH cheaper than that. Then all you have to do is some transplanting. Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 - Original Message - From: R. K. Brumback [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, July 23, 2007 2:38 PM Subject: [Repeater-Builder] GE 100 watt PA final transistors I just got a quote back from Digitron Electronics on the MRF-247 final transistors for the VHF Mastr II. They want $80.00 EACH!! OUCH I nearly crapped in the chair. They had about 5,000 of them and I would say that is the reason they have so many. Randy KI4BQN No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 7:02 PM Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 7:02 PM Yahoo! Groups Links Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome. Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 7:02 PM
[Repeater-Builder] New file uploaded to Repeater-Builder
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Repeater-Builder group. File: /FluX Research/ D-Stat/Open Source D-Stat V1.1 07-24-2007.GIF Uploaded by : dcflux [EMAIL PROTECTED] Description : Open Source: D-Stat Schematic. V1.1 07-24-2007 You can access this file at the URL: http://groups.yahoo.com/group/Repeater-Builder/files/FluX%20Research/%20D-Stat/Open%20Source%20D-Stat%20V1.1%2007-24-2007.GIF To learn more about file sharing for your group, please visit: http://help.yahoo.com/help/us/groups/files Regards, dcflux [EMAIL PROTECTED]
[Repeater-Builder] Motorola GR 900- Help wanted.
Hello. Need help to programe the Motorola GR 900 repeater. Need RSS and cableinfo.
[Repeater-Builder] Horizontal Polarity Repeater Antenna
Re: Horizontal Polarity Repeater Antenna Got to love a horizontal repeater antenna array. Base Station Antenna Repeater VHF 140 - 158 Mhz 300 W Great Gain ,, 4 Bays Folded Dipole for Repeater RX/TX Ebay Item number: 170133065932 enjoy... skipp
[Repeater-Builder] Re: Horizontal Polarity Repeater Antenna
--- In Repeater-Builder@yahoogroups.com, skipp025 [EMAIL PROTECTED] wrote: Re: Horizontal Polarity Repeater Antenna Got to love a horizontal repeater antenna array. Maybe being down under has something to do with it??
Re: [Repeater-Builder] Re: Horizontal Polarity Repeater Antenna
At 7/24/2007 05:27 PM, you wrote: --- In Repeater-Builder@yahoogroups.com, skipp025 [EMAIL PROTECTED] wrote: Re: Horizontal Polarity Repeater Antenna Got to love a horizontal repeater antenna array. Maybe being down under has something to do with it?? Too right! Bob NO6B
[Repeater-Builder] MASTR IIe dozing off
Have any of you experienced a MASTR IIe dozing off? No open fuses, no loose connections, it just forgets that it is supposed to key up when the receiver squelch opens. After resetting the control module, it works fine for a day or so and then the problem reappears. I'd settle for an over-the-air control module reset code (if one exists), but would prefer to get to the bottom of this. Any suggestions? ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour
Re: [Repeater-Builder] MASTR IIe dozing off
Is it out of band? [EMAIL PROTECTED] wrote: Have any of you experienced a MASTR IIe dozing off? No open fuses, no loose connections, it just forgets that it is supposed to key up when the receiver squelch opens. After resetting the control module, it works fine for a day or so and then the problem reappears. I'd settle for an over-the-air control module reset code (if one exists), but would prefer to get to the bottom of this. Any suggestions? ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour
Re: [Repeater-Builder] MASTR IIe dozing off
Good question! It is operating at 144.69 / 145.29. What do you think may be going on? Now this model does use channel elements. ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour
Re: [Repeater-Builder] MASTR IIe dozing off
I had a similar problem on 2M, I'll have to dig up the notes and see what we did exactly, but if I remember correctly it was a simple fix. I'll get back to you over the weekend. [EMAIL PROTECTED] wrote: Good question! It is operating at 144.69 / 145.29. What do you think may be going on? Now this model does use channel elements. ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour
Re: [Repeater-Builder] MASTR IIe dozing off
Be sure the control line is terminated. I have seen m3's get repeat disable from voice on the control line (even if remote control is not used). Vexing problem. Steve NU5D - BTW that tip came from Pete Lascelle at GE, or EGE, or Comnet, or MA/COM now days... Vincent Caruso wrote: Is it out of band? [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Have any of you experienced a MASTR IIe dozing off? No open fuses, no loose connections, it just forgets that it is supposed to key up when the receiver squelch opens. After resetting the control module, it works fine for a day or so and then the problem reappears. I'd settle for an over-the-air control module reset code (if one exists), but would prefer to get to the bottom of this. Any suggestions? _
Re: [Repeater-Builder] MASTR IIe dozing off
Actually I believe Steve has the fix, We had an unused DC control on the IIe that wreaking all sorts of havoc. Steve S. Bosshard (NU5D) wrote: Be sure the control line is terminated. I have seen m3's get repeat disable from voice on the control line (even if remote control is not used). Vexing problem. Steve NU5D - BTW that tip came from Pete Lascelle at GE, or EGE, or Comnet, or MA/COM now days... Vincent Caruso wrote: Is it out of band? [EMAIL PROTECTED] mailto:KE4ADV%40aol.com mailto:[EMAIL PROTECTED] mailto:KE4ADV%40aol.com wrote: Have any of you experienced a MASTR IIe dozing off? No open fuses, no loose connections, it just forgets that it is supposed to key up when the receiver squelch opens. After resetting the control module, it works fine for a day or so and then the problem reappears. I'd settle for an over-the-air control module reset code (if one exists), but would prefer to get to the bottom of this. Any suggestions? _
Re: [Repeater-Builder] Horizontal Polarity Repeater Antenna
And for a marine band repeater, too!!! George, KKA3HSW / WQGJ413 - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 24, 2007 6:33 PM Subject: [Repeater-Builder] Horizontal Polarity Repeater Antenna Re: Horizontal Polarity Repeater Antenna Got to love a horizontal repeater antenna array. Base Station Antenna Repeater VHF 140 - 158 Mhz 300 W Great Gain ,, 4 Bays Folded Dipole for Repeater RX/TX Ebay Item number: 170133065932 enjoy... skipp
[Repeater-Builder] Re: old Motorola
or to push to 52MHz for the amateur 6 meter band). Mike, Did I understand this correctly? The 42 to 50 split can be pushed to the 52Mc repeaters without modifying the front end? I have a U51LLT Motran that I would like to put on the 6m ham band, but digging into those front end coils has scared me off a bit (there's too darn many of them). Would be great if it could be pushed to 52Mc without mods. Also, someone on here mentioned the channel elements. My channel elements for that radio were lost when I moved to this house and I haven't been able to find any. If there are any spares floating around for the L transmitter and L receiver, either one or two channel, I'd sure like to buy them. The ones that were in there were TLN1022A and TLN1020A, but I'm told that the TLN1080 series will work also. If anyone has anything, please email with what you have and price. Thanks, Tom KB5DPE --- In Repeater-Builder@yahoogroups.com, Mike Morris [EMAIL PROTECTED] wrote: At 09:28 AM 07/22/07, Eric Lemmon [EMAIL PROTECTED] wrote: Rich, A C71LHB-3400C is a Compa-Station Base Radio for 25-50 MHz, 100 watts, Private-Line, and DC remote control. The manual that covers it is 6881005E40, which is no longer in print. I am assuming that the model number tag actually represents the equipment inside. And Rich - that radio is NOT going to cover 30 to 50mhz. It's built for a subset of those frequencies, called a range or a split in Moto terminology. The 4 in 3400 indicates that you have a dual receiver unit, or at least the radio that was in the cabinet originally did. The low band Motracs came in three ranges: (1) 30-36mhz (which can be pushed to 28mhz for the 10 meter band) (2) 36-42MHz (pretty useless except as parts, or maybe for a Volunteer Fire Department that has channels there) (3) 42-50MHz (useful to Red Cross, which has a nationwide channel at 47.42Mhz, or to push to 52MHz for the amateur 6 meter band). It's not practical to try and range change a low band Motrac as you would have to modify (or rewind) some coils. Did it come with the Channel Elements? They are little blue or gold aluminum cans that plug into a cluster of 4 pins in the receiver or transmitter. The receiver had locations for 2, the transmitter for 4, and an option board added slots 3 and 4 to the receiver. Setting that unit up on channel, assuming you have the channel elements, is about $40-50 if you re-crystal the elements yourself, or more if you have the crystal house do it. And they you get to tune it up. Mike WA6ILQ
[Repeater-Builder] Echolink Interface to RC-1000
I am trying to get my PC connected to my RC-1000. Is there any reason why I couldn't just take the 5v high line from the computer's serial port to the COS line on the Remote Repeater Line? It goes high when Echolink wants to send audio out to the repeater. Also I tried to connect an earphone up to pin 17 the remote repeater TX audio line from the RC-1000 and I am not getting anything through it. The remote repeater function is enabled and I am getting the extra tail beep. I also checked and the jumper wire from J1 to the RX audio on P1 is there. I guess this isn't a huge deal as I should be able to take the audio right from the regular rx audio pin as long as having it hooked up to the controller and the PC won't cause a problem. Thanks, Vern KI4ONW
[Repeater-Builder] M120
Día luminosoI HAVE a M120 TO USE LIKE REPEATER. ¿WHY WHEN I PLACE TO HIM A GM300 WORKS LIKE TX AND WHEN I PLACE TO HIM A MAXTRAC WORKS LIKE RX? THANKS GUYS WILLIAM A. FOURNEAU M. [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] BEGIN:VCARD VERSION:2.1 N:;WILLIAM A.;FOURNEAU FN:WILLIAM A. FOURNEAU EMAIL;PREF;INTERNET:[EMAIL PROTECTED] EMAIL;INTERNET:[EMAIL PROTECTED] EMAIL;INTERNET:[EMAIL PROTECTED] EMAIL;INTERNET:[EMAIL PROTECTED] REV:20070725T015644Z END:VCARD
[Repeater-Builder] Mastr III - Anybody using one?
Does anyone out there have a VHF Mastr III in service as a ham repeater? Feedback - good or bad? Sources for purchase of used/reconditioned?
Re: [Repeater-Builder] Mastr III - Anybody using one?
Bought new around 1991 - lost one driver module in the PA - use internal CWID/hang time, timeout timer, etc - Have outboard dtmf decoder tied to a 440 receiver to turn off the repeater, otherwise everything stock from GE - we do have a doug hall voter wired in using the local receiver plus 3 satellite receivers carried back to the hub on 438 mhz - been very solid repeater.We do not have any outboard controllers / noise makers wired in. The repeater is W5LM in Temple, Texas www.tarc.org Steve NU5D Almost forgot - did have a problem with talkies talking down the channel guard tone - there is a software fix - hex code that once ctcss is detected - will remain detected until RUS goes away. sb Tony L. wrote: Does anyone out there have a VHF Mastr III in service as a ham repeater? Feedback - good or bad? Sources for purchase of used/reconditioned? Yahoo! Groups Links
Re: [Repeater-Builder] Re: old Motorola
I have tuned on 2 of the U51LLT radios and many of the L receivers that were in the later low-band motracs, all going to 52-53 MHz. I never had a problem getting a L receiver to tune to 52.525 MHz or the 53 MHz repeater output band EXCEPT for the multiplier stage needs to have about 3 capacitors swapped out for higher range. The front end coils always tuned up fine for me. On the 2 LLT transmitters I tuned, one exicter tuned up fine and the other exciter tuned up with the output slug nearly out of the coil form. The transmitter with the exciter output slug coming out of the coil form peaked at about 47 watts. I always wanted to try replacing the capacitor with a lower value to see if the full 50 watts would appear, but never did actually try it. -- Original Message -- Received: Tue, 24 Jul 2007 11:05:38 PM CDT From: tallinson2 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: old Motorola or to push to 52MHz for the amateur 6 meter band). Mike, Did I understand this correctly? The 42 to 50 split can be pushed to the 52Mc repeaters without modifying the front end? I have a U51LLT Motran that I would like to put on the 6m ham band, but digging into those front end coils has scared me off a bit (there's too darn many of them). Would be great if it could be pushed to 52Mc without mods. Also, someone on here mentioned the channel elements. My channel elements for that radio were lost when I moved to this house and I haven't been able to find any. If there are any spares floating around for the L transmitter and L receiver, either one or two channel, I'd sure like to buy them. The ones that were in there were TLN1022A and TLN1020A, but I'm told that the TLN1080 series will work also. If anyone has anything, please email with what you have and price. Thanks, Tom KB5DPE --- In Repeater-Builder@yahoogroups.com, Mike Morris [EMAIL PROTECTED] wrote: At 09:28 AM 07/22/07, Eric Lemmon [EMAIL PROTECTED] wrote: Rich, A C71LHB-3400C is a Compa-Station Base Radio for 25-50 MHz, 100 watts, Private-Line, and DC remote control. The manual that covers it is 6881005E40, which is no longer in print. I am assuming that the model number tag actually represents the equipment inside. And Rich - that radio is NOT going to cover 30 to 50mhz. It's built for a subset of those frequencies, called a range or a split in Moto terminology. The 4 in 3400 indicates that you have a dual receiver unit, or at least the radio that was in the cabinet originally did. The low band Motracs came in three ranges: (1) 30-36mhz (which can be pushed to 28mhz for the 10 meter band) (2) 36-42MHz (pretty useless except as parts, or maybe for a Volunteer Fire Department that has channels there) (3) 42-50MHz (useful to Red Cross, which has a nationwide channel at 47.42Mhz, or to push to 52MHz for the amateur 6 meter band). It's not practical to try and range change a low band Motrac as you would have to modify (or rewind) some coils. Did it come with the Channel Elements? They are little blue or gold aluminum cans that plug into a cluster of 4 pins in the receiver or transmitter. The receiver had locations for 2, the transmitter for 4, and an option board added slots 3 and 4 to the receiver. Setting that unit up on channel, assuming you have the channel elements, is about $40-50 if you re-crystal the elements yourself, or more if you have the crystal house do it. And they you get to tune it up. Mike WA6ILQ
