Re: [Repeater-Builder] Motorola PL reeds.
At 12:50 PM 04/14/09, you wrote: Still looking for a source of 100 Hz,1Z PL reeds receive, Micor vintage. I need 6. Are they available new? When you could get them new they were expensive... Has anyone modified or moved a reed of a different frequency. How is it done? I have lots to experiment on. The decode reed works by functioning as a very sharp tuned series resonant transformer. Picture a single-legged tuning fork with a bar magnet mounted at right angles to the top of the leg (if the leg is vertical, the magnet is mounted in a hole drilled horizontally in the top end of the leg). The driving coil is around one end of the magnet, the driven coil is around the other. As you can imagine from the overall size of the reed everything is miniaturized. The circuitry around the decode reed itself is designed such that low-pass filtered receiver audio drives one coil, the other coil functions as a generator, makes DC, and the DC voltage unsquelches the receiver. The encode reed driver circuitry has the reed in the feedback loop of an oscillator. In most cases a decode reed works in an encoder since it is just a sharp series resonant filter. The resonant frequency was determined by the mass of the reed and magnet together... the more the mass, the lower the frequency. Changing the frequency upward could be done by filing the edge of the reed, but it's not practical... you can't get the reed into the case, and a second reason it's not practical is that you can get a TS32 decoder off ebay for less than $40 and wire it in parallel with the existing tone board. Or in place of the existing tone board. Now that everyone has had a good laugh, thoughts, comments, helpful suggestions. The Micor decode reed (the fat reed) is a model TLN8381A or B or C. Google it. See who has them for sale. Fair warning - don't google the words /pl reed/ or /tone reed/... those word pairs are too common. Look on the Suppliers page at www.repeater-builder.com and call the used equipment vendors like Telepath in San Jose, California, Aircomm in Phoenix, Arizona on their 800 numbers. Look on the completed sales page at ebay for that part number. Email the sellers that you are looking for several TLN8381 on 100hz. One seller I have dealt with is u.s.-communications. Another is az-comm or az-com, I forget how he spelled it. Mike WA6ILQ
RE: [Repeater-Builder] Repeater information please
As to MSNs The 43MSN high band mobile was the first all solid state Motorola mobile transmitter. It was the first radio labeled Motran and was a direct swapout of the Motrac - same cable, same head, same everything. The center chassis section that held the T-supply in the Motrac was all empty space. The 44MST came along later and was based on the same basic design (and came in 4 freq and 12 freq models). In the 4-freq models transmit F1-F4 was in the exciter, receive F1 and F2 were in the receiver chassis, the receive F3 and F4 channel elements were in a corner of the open center area. The 12 freq was developed for the mobile telephone industry and was labeled MARK XII. It was the first binary switched radio in the Moto lineup. It was all 12v - the open center section of the chassis held the additional 18 channel elements. The high power 74MST was a 4 freq UHF MOTRAN (and used a 28volt PA deck run by a 12-to-28 transistorized switching power supply in the center section) along with the receive F3 and F4 channel elements. To get back to the topic, his station has an M series receiver, and an S series exciter that puts out about 20-30w on UHF. It's loosely based on the 74MST design but less the finals, I forget if the MST driver (the final of his exciter) is a 12v stage or a 28v stage. Mike WA6ILQ At 10:24 PM 04/14/09, you wrote: If I am decoding the model numbers properly... The first station is most likely a 250W UHF MOTRAN base station, but has a tube in the final PA. The second station is a high-power continuous-duty 800 MHz (or possibly 900 MHz) MICOR. (Check the channel elements for the exact freq.) Someone will correct me if I am wrong. ;-) http://www.repeater-builder.com/motorola/motorola-suffixes.html Can't help you with manual numbers off-hand, but I'm sure someone else will chime in. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of bene6148 Sent: Tuesday, April 14, 2009 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Repeater information please I have a Motorola Motrac model #B94MSB-1106A, and a Micor model #C75RCB6105AT. I would appreciate any information on these two models as well as manual numbers. Yahoo! Groups Links
Re: [Repeater-Builder] Repeater information please
Mike Morris WA6ILQ wrote: The high power 74MST was a 4 freq UHF MOTRAN (and used a 28volt PA deck run by a 12-to-28 transistorized switching power supply in the center section) along with the receive F3 and F4 channel elements. I don't remember ever seeing those! I saw lots of U74MST's that were rated 90W, and had a ceramic tube final. Also most had relays that switched tuning in the PA so that it would do talkaround. When you went to F2, for instance, the relay pulled in, and changed the tuning of the PA. Got to be a nightmare once they got to be 10-15 years old... Jim
RE: [Repeater-Builder] Remote Receiver
I'll +1 this. I like the simple package of a crossbanded g.e. mastr ii. I didn't use ant xtra hardware either. I just jumped the rx to the tx. Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of n...@no6b.com Sent: Tuesday, April 14, 2009 11:48 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Remote Receiver At 4/14/2009 18:41, you wrote: I d like some advice. My radio club would like to have a remote receiver for our 2-meter repeater (ham band). I would appreciate any advice you can offer regarding equipment and anything I should be looking for or avoiding. There is no I assume your remote receiver installation will consist of a 2 meter RX TX on some higher band. Assuming the link band is 440, one approach would be a duplexed UHF GE Mastr II, Exec II or MVP with the RX swapped out for a VHF RX. Then build a simple zero hang-time COR circuit audio interface. If you need control ID then you can go with one of the NHRC controllers that fit inside the above radios. My favorite of the bunch is the NHRC micro because it can easily fit inside any of them without displacing the stock CTCSS board, which IMO is a decoder worthy of not being replaced even if it means you have to add a separate encoder since they don't (easily) simultaneously encode decode. Add a dual band antenna, crossband diplexer power supply your remote RX installation is complete. Bob NO6B Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.287 / Virus Database: 270.11.54/2056 - Release Date: 04/14/09 06:17:00
RE: [Repeater-Builder] Repeater information please
Thanks Mike. I knew that if I was in error, someone would correct me. Decoding older Motorola stuff is not my strongest area. ;-) But at least I got it right as far as it being a Motran, yes? Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Mike Morris WA6ILQ As to MSNs The 43MSN high band mobile was the first all solid state Motorola mobile transmitter. It was the first radio labeled Motran and was a direct swapout of the Motrac - same cable, same head, same everything. The center chassis section that held the T-supply in the Motrac was all empty space. The 44MST came along later and was based on the same basic design (and came in 4 freq and 12 freq models). In the 4-freq models transmit F1-F4 was in the exciter, receive F1 and F2 were in the receiver chassis, the receive F3 and F4 channel elements were in a corner of the open center area. The 12 freq was developed for the mobile telephone industry and was labeled MARK XII. It was the first binary switched radio in the Moto lineup. It was all 12v - the open center section of the chassis held the additional 18 channel elements. The high power 74MST was a 4 freq UHF MOTRAN (and used a 28volt PA deck run by a 12-to-28 transistorized switching power supply in the center section) along with the receive F3 and F4 channel elements. To get back to the topic, his station has an M series receiver, and an S series exciter that puts out about 20-30w on UHF. It's loosely based on the 74MST design but less the finals, I forget if the MST driver (the final of his exciter) is a 12v stage or a 28v stage. Mike WA6ILQ At 10:24 PM 04/14/09, you wrote: If I am decoding the model numbers properly... The first station is most likely a 250W UHF MOTRAN base station, but has a tube in the final PA. The second station is a high-power continuous-duty 800 MHz (or possibly 900 MHz) MICOR. (Check the channel elements for the exact freq.) Someone will correct me if I am wrong. ;-) http://www.repeater-builder.com/motorola/motorola-suffixes.html Can't help you with manual numbers off-hand, but I'm sure someone else will chime in. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of bene6148 Sent: Tuesday, April 14, 2009 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Repeater information please I have a Motorola Motrac model #B94MSB-1106A, and a Micor model #C75RCB6105AT. I would appreciate any information on these two models as well as manual numbers.
[Repeater-Builder] OT looking for HTs
Is there someone on the list,that can contact me off list,that is a motorola dealer? I am in need of 3 portables programmed and ready to go. thnx es 73 Ray n3pyj n3...@windstream.net
RE: [Repeater-Builder] Remote Receiver
Lance, Mark, Cort, Butch, Bob, Chris, and others, Thanks for the good advice and quick response. I will follow up on the suggestions, and get an idea of the cost. It hadn't occurred to me that I would need a voter. With only this one remote receiver, I thought I could just rely on the controller (ACC RC-850) to accept the audio in accordance with the -850 priorities. Is this not suitable? I have a UHF Mastr II. I guess one approach would be to swap out the receiver for a VHF receiver and use the UHF as the link. One of you has done this with good result. I also have an ACC RC-85 controller. I could use this with a VHF RX, a UHF TX, and have a UHF RX at the base. Does the link TX have to identify (amateur service)? I believe it does have to. Is there a way to avoid having extra IDs when the link is active? Well, I guess once every ten minutes isn't much of a problem. Thanks again. More suggestions are welcome. John Transue AF4PD __ NOD32 4010 (20090415) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com
RE: [Repeater-Builder] Remote Receiver
Many systems will use a different PL for different receive sites to get around the need for a voter. It requires more education for the users to know where they are which receiver they get into better, but its a simple setup that works. Tom W9SRV --- On Wed, 4/15/09, John Transue jtran...@cox.net wrote: From: John Transue jtran...@cox.net Subject: RE: [Repeater-Builder] Remote Receiver To: Repeater-Builder@yahoogroups.com Date: Wednesday, April 15, 2009, 12:45 PM Lance, Mark, Cort, Butch, Bob, Chris, and others, Thanks for the good advice and quick response. I will follow up on the suggestions, and get an idea of the cost. It hadn't occurred to me that I would need a voter. With only this one remote receiver, I thought I could just rely on the controller (ACC RC-850) to accept the audio in accordance with the -850 priorities. Is this not suitable? I have a UHF Mastr II. I guess one approach would be to swap out the receiver for a VHF receiver and use the UHF as the link. One of you has done this with good result. I also have an ACC RC-85 controller. I could use this with a VHF RX, a UHF TX, and have a UHF RX at the base. Does the link TX have to identify (amateur service)? I believe it does have to. Is there a way to avoid having extra IDs when the link is active? Well, I guess once every ten minutes isn't much of a problem. Thanks again. More suggestions are welcome. John Transue AF4PD __ NOD32 4010 (20090415) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com Yahoo! Groups Links
[Repeater-Builder] Cushman CE-4 Service Monitor
Darned thing is going out of lock,. The unlocked LED is flashing off and on. Does anyone have any idea where to begin to look? Does anyone have a service manual on it.? I see several Cushman monitors on E-bay, but not this one. Terry-WB0VQP
[Repeater-Builder] Looking for parts placement diagram for TLD1593-A PA
I have looked all over for the diagram. I found the schematic but not the diagram. Motorola/Micor T53RTA3903 BA 60 watt Power Amp. If anyone has or knows where to get one I would be grateful. Thanks, Henry
RE: [Repeater-Builder] Remote Receiver
--- On Wed, 4/15/09, John Transue jtran...@cox.net wrote: From: John Transue jtran...@cox.net Subject: RE: [Repeater-Builder] Remote Receiver To: Repeater-Builder@yahoogroups.com Date: Wednesday, April 15, 2009, 1:45 PM Lance, Mark, Cort, Butch, Bob, Chris, and others, Thanks for the good advice and quick response. I will follow up on the suggestions, and get an idea of the cost. It hadn't occurred to me that I would need a voter. With only this one remote receiver, I thought I could just rely on the controller (ACC RC-850) to accept the audio in accordance with the -850 priorities. Is this not suitable? It can be used for a quick and dirty voter. One problem is when both receivers are picking up the signal and the primary receiver is not as full quietning as the other receiver. You get a lot of noise from that receiver where it would be clear audio from the second receiver. This can be helped by setting the squelch tighter or by using differant subaudio tones for the differant receivers.
Re: [Repeater-Builder] Remote Receiver
I used to play PL tricks, priority tricks, etc... FINALLY bought a voter. Now I'd never go back. Of course, what I'm about to say is more pronounced at UHF than VHF, but I've found all kinds of areas where slightly weak picket fencing etc. has magically cured itself with a proper voter in place. I'm sold -- but it does cost money to do this, and I understand financial constraints. Another plug for the programable radios I'm using -- the R1225 has a built-in controller that works great for the link. I've set it to not encode PL when IDing and to suspend the ID on COR. For anyone about to ask the hard questions about using it as a link, yes true zero hang- time on that unit. On Apr 15, 2009, at 12:45 PM, John Transue wrote: Lance, Mark, Cort, Butch, Bob, Chris, and others, Thanks for the good advice and quick response. I will follow up on the suggestions, and get an idea of the cost. It hadn't occurred to me that I would need a voter. With only this one remote receiver, I thought I could just rely on the controller (ACC RC-850) to accept the audio in accordance with the -850 priorities. Is this not suitable? I have a UHF Mastr II. I guess one approach would be to swap out the receiver for a VHF receiver and use the UHF as the link. One of you has done this with good result. I also have an ACC RC-85 controller. I could use this with a VHF RX, a UHF TX, and have a UHF RX at the base. Does the link TX have to identify (amateur service)? I believe it does have to. Is there a way to avoid having extra IDs when the link is active? Well, I guess once every ten minutes isn't much of a problem. Thanks again. More suggestions are welcome. John Transue AF4PD __ NOD32 4010 (20090415) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com -- Cort Buffington H: +1-785-838-3034 M: +1-785-865-7206 Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:repeater-builder-dig...@yahoogroups.com mailto:repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Remote Receiver
John, Tom is right, and this is a quick and easy way to add a single-site remote RX. But like he said, your users will need to be aware of where they are (physically) in the repeater coverage in order to access the proper receiver. I do know of some systems that don't use a voter - the remote receivers are located at the edges of regular coverage, so the effects of heterodyne is minimal. I guess it all depends on how much engineering effort you want to expend on the system, and maintenance you wish to perform once in operation. A voting receiver system is (IMHO) top shelf, but it does require more engineering and maintenance. The benefits are that it is totally transparent to the end users. The cost of a voting system really starts to show based upon the way it is linked back to the main site. RF is the least expensive, but for the typical amateur repeater system, you'll need dedicated link radios and antennas at each remote site, plus the added receivers and antennas at the main site. (I like the one suggestion of making a GE radio into a cross-band repeater, receiving on the repeater freq and transmitting out on a different band.) Some guys are starting to use VoIP for links (discussed earlier on this list)... or the next step up is dedicated T-1 landlines, which have recurring monthly costs associated. For the system I am building (my 440 machine), the county radio system is allowing me to use up to 3 voice channels on of their microwave backbone at no cost to me. So all I need to acquire/install/maintain are the receiver units at all the various sites, and the voter/comparator at the main site. All sites will use the same PL for repeater access, so I'll end up with wide-area coverage (or, in my case, HT access county-wide) with minimal expense, and it is LID-proof for the users. Like Lance said, receiver shelf units are in the $100 range, and the comparator shelf goes for about the same price or maybe a touch more. SQMs (Signal Quality Module) for each receiver (for the comparator shelf) are going for about $40 each, and the necessary manuals can be found as well... I just wish I could work out the same linking arrangement for my 900 machine... but it is not sited at the same tower. ;-p Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of TGundo 2003 Many systems will use a different PL for different receive sites to get around the need for a voter. It requires more education for the users to know where they are which receiver they get into better, but its a simple setup that works. Tom W9SRV --- On Wed, 4/15/09, John Transue jtran...@cox.net wrote: Lance, Mark, Cort, Butch, Bob, Chris, and others, Thanks for the good advice and quick response. I will follow up on the suggestions, and get an idea of the cost. It hadn't occurred to me that I would need a voter. With only this one remote receiver, I thought I could just rely on the controller (ACC RC-850) to accept the audio in accordance with the -850 priorities. Is this not suitable? I have a UHF Mastr II. I guess one approach would be to swap out the receiver for a VHF receiver and use the UHF as the link. One of you has done this with good result. I also have an ACC RC-85 controller. I could use this with a VHF RX, a UHF TX, and have a UHF RX at the base. Does the link TX have to identify (amateur service)? I believe it does have to. Is there a way to avoid having extra IDs when the link is active? Well, I guess once every ten minutes isn't much of a problem. Thanks again. More suggestions are welcome. John Transue AF4PD
Re: [Repeater-Builder] Remote Receiver
One voter-based network I used to use back in Tennessee used a low-volume CW ID at the beginning of a transmission for the remote TX stations. I believe this would satisfy the FCC ID needs. YMMV, IANAL, and all that stuff. -Brian / KF4ZWZ On Wed, Apr 15, 2009 at 10:45 AM, John Transue jtran...@cox.net wrote: Does the link TX have to identify (amateur service)? I believe it does have to. Is there a way to avoid having extra IDs when the link is active? Well, I guess once every ten minutes isn't much of a problem.
[Repeater-Builder] MSF5000 900 MHz Repeaters
I have recently decommissioned and dismantled some 900 MHz MSF5000 repeaters. Before I spend the time cataloging all the components that I have, I am sending out a blanket message to anyone that may be interested. The units were a mix of Conventional and Trunking. All were operational when taken out of Service The AMPLIFIERS were all used in other applications and are NOT AVAILABLE. I will eventually inventory, price and list this equipment for sale, but again, before I go through all that effort, if anyone is interested in anything, let me know and I will see if I have what you need and we can work out pricing on an individual basis. Buyer will be responsible for shipping. Please send all inquiries OFFLINE to BBFMRf at Yahoo dot com
[Repeater-Builder] Schematic for GM300/M120 Interface cable with delay
I am in the process of building a repeater using two M120 radios. I would like to build my own interface cable and looking for a schematic diagram. What I need to know is the value of the trim pot to adjust the level of the audio going to the Tx Radio and to adjust the squelch tail. This cable assembly can be purchased from Ebay, but I don't want to buy something that is very simple to build. Thanks, Romy
RE: [Repeater-Builder] Repeater information please
Minor technicality - Wasn't the mobile radio that was made from HT-200 boards the first solid state Motorola mobile transmitter? -- Original Message -- Received: Wed, 15 Apr 2009 01:13:47 AM PDT From: Mike Morris WA6ILQ wa6...@gmail.com To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Repeater information please As to MSNs The 43MSN high band mobile was the first all solid state Motorola mobile transmitter. It was the first radio labeled Motran and was a direct swapout of the Motrac - same cable, same head, same everything. The center chassis section that held the T-supply in the Motrac was all empty space. The 44MST came along later and was based on the same basic design (and came in 4 freq and 12 freq models). In the 4-freq models transmit F1-F4 was in the exciter, receive F1 and F2 were in the receiver chassis, the receive F3 and F4 channel elements were in a corner of the open center area. The 12 freq was developed for the mobile telephone industry and was labeled MARK XII. It was the first binary switched radio in the Moto lineup. It was all 12v - the open center section of the chassis held the additional 18 channel elements. The high power 74MST was a 4 freq UHF MOTRAN (and used a 28volt PA deck run by a 12-to-28 transistorized switching power supply in the center section) along with the receive F3 and F4 channel elements. To get back to the topic, his station has an M series receiver, and an S series exciter that puts out about 20-30w on UHF. It's loosely based on the 74MST design but less the finals, I forget if the MST driver (the final of his exciter) is a 12v stage or a 28v stage. Mike WA6ILQ At 10:24 PM 04/14/09, you wrote: If I am decoding the model numbers properly... The first station is most likely a 250W UHF MOTRAN base station, but has a tube in the final PA. The second station is a high-power continuous-duty 800 MHz (or possibly 900 MHz) MICOR. (Check the channel elements for the exact freq.) Someone will correct me if I am wrong. ;-) http://www.repeater-builder.com/motorola/motorola-suffixes.html Can't help you with manual numbers off-hand, but I'm sure someone else will chime in. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of bene6148 Sent: Tuesday, April 14, 2009 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Repeater information please I have a Motorola Motrac model #B94MSB-1106A, and a Micor model #C75RCB6105AT. I would appreciate any information on these two models as well as manual numbers. Yahoo! Groups Links
RE: [Repeater-Builder] Looking for parts placement diagram for TLD1593-A PA
Henry, I have sent you a PDF of the image you seek, by private mail. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Henry Harms Sent: Wednesday, April 15, 2009 11:18 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Looking for parts placement diagram for TLD1593-A PA I have looked all over for the diagram. I found the schematic but not the diagram. Motorola/Micor T53RTA3903 BA 60 watt Power Amp. If anyone has or knows where to get one I would be grateful. Thanks, Henry
RE: [Repeater-Builder] Remote Receiver
At 4/15/2009 10:45, you wrote: Lance, Mark, Cort, Butch, Bob, Chris, and others, Thanks for the good advice and quick response. I will follow up on the suggestions, and get an idea of the cost. It hadn't occurred to me that I would need a voter. With only this one remote receiver, I thought I could just rely on the controller (ACC RC-850) to accept the audio in accordance with the -850 priorities. Is this not suitable? As others have mentioned there are less complex expensive alternatives, but none are as user friendly as a good voter. I have 1 repeater in my system with 2 RXs: the main RX is at the remote site with the TX, the remote RX is plugged into the link hub at my home. Each uses a separate CTCSS tone, so the users have to pick which RX they want to access. Does the link TX have to identify (amateur service)? I believe it does have to. Officially, yes. In practice, many don't. Bob NO6B
