Re: [Repeater-Builder] Ruggedised panel antennas
Try the Polar Electronics Sector Coverage Panel Antenna model 375A. At 10dBd it a little short on gain but. Web site www.polarelectronics.com.au Cheers, Jack. VK4JRC Sent from my Apple iPad Tablet PC On Jul 7, 2010, at 3:24 PM, Gareth Bennett gare...@es.co.nz wrote: Hi Group, I'm just wondering if anybody has an alternative to Katherin-Scala for heavy duty radomed panel antennas in the 450-500 MHz band at around 10dBi gain that will stand up to the abuse of an alpine site (2Km ASL) Just after feedback and opinions Cheers Gareth Bennett RadioSystems Limited P.O. Box 5202 Dunedin 9024 New Zealand DDI: (03) 489 1101 FAX: (03) 489 1151 MOB: (0224) 588 377 gare...@radsys.co.nz - Original Message - From: Oz-in-DFW To: Repeater-Builder@yahoogroups.com Sent: Wednesday, July 07, 2010 10:07 AM Subject: Re: [Repeater-Builder] Proto boards Or: http://www.wa5vjb.com/products4.html 6.5 by 4.25 Large Proto Board $5 3.75 by 2.75 Small Proto Board $3 Kent is also a source of economical built-to-spec preamps. -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport)
Re: [Repeater-Builder] Ruggedised panel antennas
On 7/7/2010 2:32 AM, Jack Chomley wrote: Try the Polar Electronics Sector Coverage Panel Antenna model 375A. At 10dBd it a little short on gain but. Web site www.polarelectronics.com.au Cheers, Jack. VK4JRC Except that 10 dBd is a little more then 2db gain over the 10 dBi he spec'd! On Jul 7, 2010, at 3:24 PM, Gareth Bennettgare...@es.co.nz wrote: Hi Group, I'm just wondering if anybody has an alternative to Katherin-Scala for heavy duty radomed panel antennas in the 450-500 MHz band at around 10dBi gain that will stand up to the abuse of an alpine site (2Km ASL) Just after feedback and opinions Cheers Gareth Bennett
Re: [Repeater-Builder] carrier operated relay
Here is one I use for radios that have an active hi cos signal, about as simple as it gets. tom On 7/6/2010 8:42 PM, Chuck Kelsey wrote: This one's on the Repeater Builder site: http://www.repeater-builder.com/projects/hangtimer.html Chuck WB2EDV - Original Message - From:sbjohns...@aol.com To:Repeater-Builder@yahoogroups.com Sent: Tuesday, July 06, 2010 8:36 PM Subject: Re: [Repeater-Builder] carrier operated relay Can anybody help me to make a makeshift repeater, I need a schematic diagram for carrier operated relay or COR for two radio transceivers to be converted into a repeater. Yahoo! Groups Links attachment: Cos.jpg
[Repeater-Builder] Re: carrier operated relay
Which radios are involved here? Presume there is no actual COR output or you have not found it? Are you looking for an audio driven circuit? Maybe a few more details may assist everyone. Doug - GM7SVK --- In Repeater-Builder@yahoogroups.com, manny recede mrj12...@... wrote: Greetings, Can anybody help me to make a makeshift repeater, I need a schematic diagram for carrier operated relay or COR for two radio transceivers to be converted into a repeater. Thanx to anyone who can help on this. Manny , ( mrj12...@... )
RE: [Repeater-Builder] 6 Meter Heliax Duplexers
Hi John, Thanks for the pix! I think I've found a way to make it work. 1. Got some brass tubing that is just about the same diameter as the rg-8's center conductor poly. (might have to use some silicon grease to make it slide a bit easier). 2. Solder top of brass tube to side of the heliax's copper center conductor. 3. Wedge some foam or other non-conductor down inside the heliax to make sure the brass doesn't move around. (this shouldn't have any affect on the capacitance between the RG-8's center the brass tube). 4. Solder brass screw with 2 nuts to end of RG-8's center conductor. 5. More mechanical stuff here, but too many words to use. Will take pix when I'm done. thanks, Tim
[Repeater-Builder] Re: carrier operated relay project
Re: carrier operated relay project Greetings, You forgot to add the earth people part. Hi Manny, Can anybody help me to make a makeshift repeater, I need a schematic diagram for carrier operated relay or COR for two radio transceivers to be converted into a repeater. Thanks to anyone who can help on this. Manny , ( mrj12...@... ) The carriers operated relay circuit is pretty generic. The connection to the receiver (radio) and the audio interface are the portions of the project that require the most attention. And the above issues are tied to the specific radio model and how easy or hard it is to obtain (or derive) those connection points. For a repeater, you could simply sample the speaker audio, use it to turn on a basic cor circuit along with an audio path connection for the transmit radio. But the circuit won't be the most user friendly operation because the first part of your transmission is almost always chopped off and silent periods also drop the transmit signal. But the circuit is simple and easy to do, plus it doesn't normally require you go inside the radios to make a connection. The more common methods include getting inside the receiver to obtain and interface a COS/COR logic wire/circuit and what ever method you choose to obtain audio for the transmitter. So the specifics past a generic relay COR circuit kind of depend on what radios you use for the repeater. Members of the Repeater Builder Group have interfaced most of the common radios into repeater hardware so you need only let us know what radios you plan to use. We'll be happy to provide you with abuse $%#*@ ... I mean additional help. cheers, s.
Re: [Repeater-Builder] 6 Meter Heliax Duplexers
Tim wrote: I think I've found a way to make it work. 1. Got some brass tubing that is just about the same diameter as the rg-8's center conductor poly. (might have to use some silicon grease to make it slide a bit easier). Tip... I made a lot of antennas using hobby brass tubing. I found that the center conductor and dielectric from quality RG-8 was slightly too large for the (5/16?) hobby brass, HOWEVER, the center conductor and dielectric from legacy Radio Shack solid dielectric coax sleeved in with a nice snug fit. The RS coax was of poor quality (in my opinion) because of the lack of adequate shielding, but this made good use of otherwise poor quality cable. YMMV. Kevin Custer
Re: [Repeater-Builder] 6 Meter Heliax Duplexers
Hi Kevin, Then the stuff I found in the barn must have been the 'lesser quality' stuff. It 'just' fits inside of the 5/16 brass tube! Thanks, Tim On 7/7/2010 9:09 AM, Kevin Custer wrote: Tim wrote: I think I've found a way to make it work. 1. Got some brass tubing that is just about the same diameter as the rg-8's center conductor poly. (might have to use some silicon grease to make it slide a bit easier). Tip... I made a lot of antennas using hobby brass tubing. I found that the center conductor and dielectric from quality RG-8 was slightly too large for the (5/16?) hobby brass, HOWEVER, the center conductor and dielectric from legacy Radio Shack solid dielectric coax sleeved in with a nice snug fit. The RS coax was of poor quality (in my opinion) because of the lack of adequate shielding, but this made good use of otherwise poor quality cable. YMMV. Kevin Custer
[Repeater-Builder] Re: 6 Meter Heliax - Hard-line Duplxers Piston Caps
Re: 6 Meter Heliax - Hard-line Duplxers Piston Caps A recent Email conversation with another Group member... I had recently revisited the subject of the Hard-line Notch sections Duplexers followed by a few Google Searches. The results returned the classic Texas Duplexer and a number of other clone and next-step projects. However, One England/UK Ham had dealt with the piston capacitor problem by making his own and sharing that information with the US Amateur whose web page I found the initial pictures and description of. You simply need to search Google in more detail to find that page. When I get back to my office computer on Friday I can try to forward the URL or duplexer info to you if you direct Email at that time. There's a lot of new material on the web regarding 6 meter duplexer projects so a revisit is well worth the effort. There are other methods to construct most every section of the original design, some are major improvements. I ended up saving about 6 different web page sources full of wonderful ideas. They're still on the web if you search them out... s. tahrens301 tahr...@... wrote: Hi Folks, Well, they are complete, but there seems to be a problem with the transmit side 'cavities'. The variable capacitor from the center of the SO-239 to the center conductor gets extremely hot. I'm running about 70 watts out of the PA, and the devices that I used are identical to what was shown in the construction article. Just wondering if anyone else has built these, and did you see heating as well. (the first piston trimmers I used arc'd right thru)! Thanks, Tim W5FN
[Repeater-Builder] Hard line duplexer piston cap info
re: Hard line duplexer piston cap info Of course I couldn't easily find the 6 meter hard line duplexer piston capacitor construction information while typing my last post... and one minute later it turned up: http://k5jmp.us/Six_Meter_Heliax_and_Helical_Duplexer_info/6m_duplexer_page.htm Credit is properly given to Brian - G4UTM for the roll your own piston cap that works very well. For the http://www.gb3fh.eclipse.co.uk/technical.htm repeater system. cheers, skipp
Re: [Repeater-Builder] Ruggedised panel antennas
Ahem..senior moment!! Sent from my Apple iPad Tablet PC On Jul 7, 2010, at 10:49 PM, wd8chl wd8...@gmail.com wrote: On 7/7/2010 2:32 AM, Jack Chomley wrote: Try the Polar Electronics Sector Coverage Panel Antenna model 375A. At 10dBd it a little short on gain but. Web site www.polarelectronics.com.au Cheers, Jack. VK4JRC Except that 10 dBd is a little more then 2db gain over the 10 dBi he spec'd! On Jul 7, 2010, at 3:24 PM, Gareth Bennettgare...@es.co.nz wrote: Hi Group, I'm just wondering if anybody has an alternative to Katherin-Scala for heavy duty radomed panel antennas in the 450-500 MHz band at around 10dBi gain that will stand up to the abuse of an alpine site (2Km ASL)
Re: [Repeater-Builder] Re: MSF-5000 information needed
Looking for more information on the Control Head. I have several CXB's without PA's. I will be using a Micor PA with external circulator. Looking for information on the feed back comming from a MSF PA to the exciter. Ralph - Original Message - From: wb6dgn wb6...@att.net To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 7:55:02 PM Subject: [Repeater-Builder] Re: MSF-5000 information needed The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt source and two lower current 13.8 volt sources, fused at 6.3 amps each. There is also decoupling and filtering on a distribution board which also provides overvoltage and overcurrent protection. Depending on your 12 volt source, you may want to find a parts donor power supply and adapt that distribution board to suit your needs. The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts, however. One thing that you will need, however is what Motorola calls the Low Power Control Head. This is a rather deceptive name for a rather simple device that senses forward and reflected power and sends that information to the power control circuitry in the RF tray. This information is normally located on one of the RF amps. (I forgot which) but when the PA's are not used, the control head performs that function. Schematics of the power supplies and the control head should be on Repeater Builder TIP pages or they can be found in most of the MSF service manuals. Good luck, Tom DGN --- In Repeater-Builder@yahoogroups.com , Robert Pease r...@... wrote: I was given an MSF-5000 for VHF, without the power supply or the PA, just the rf deck and the control deck. I want to use it for a small on site repeater for linking in an EmCom vehicle. My understanding is that it will put out about 5 watts without the PA. Are there any problems with using it this way and what do I need for DC power, I would love to run it directly off the 12V battery bank that runs the other equipment. I haven't even started looking at it, it is in the garage waiting the time, but with the time approaching I thought I would send our a request and get some info before I jumped on it. Thanks - KS4EC - Rob Robert Pease P No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced. Think before you print! Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. . -- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer.
[Repeater-Builder] Re: MSF-5000 information needed
Ralph, Send me an email and I'll scan those pages and send them back to you. Tom --- In Repeater-Builder@yahoogroups.com, Ralph S. Turk w7...@... wrote: Looking for more information on the Control Head. I have several CXB's without PA's. I will be using a Micor PA with external circulator. Looking for information on the feed back comming from a MSF PA to the exciter. Ralph - Original Message - From: wb6dgn wb6...@... To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 7:55:02 PM Subject: [Repeater-Builder] Re: MSF-5000 information needed The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt source and two lower current 13.8 volt sources, fused at 6.3 amps each. There is also decoupling and filtering on a distribution board which also provides overvoltage and overcurrent protection. Depending on your 12 volt source, you may want to find a parts donor power supply and adapt that distribution board to suit your needs. The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts, however. One thing that you will need, however is what Motorola calls the Low Power Control Head. This is a rather deceptive name for a rather simple device that senses forward and reflected power and sends that information to the power control circuitry in the RF tray. This information is normally located on one of the RF amps. (I forgot which) but when the PA's are not used, the control head performs that function. Schematics of the power supplies and the control head should be on Repeater Builder TIP pages or they can be found in most of the MSF service manuals. Good luck, Tom DGN --- In Repeater-Builder@yahoogroups.com , Robert Pease robp@ wrote: I was given an MSF-5000 for VHF, without the power supply or the PA, just the rf deck and the control deck. I want to use it for a small on site repeater for linking in an EmCom vehicle. My understanding is that it will put out about 5 watts without the PA. Are there any problems with using it this way and what do I need for DC power, I would love to run it directly off the 12V battery bank that runs the other equipment. I haven't even started looking at it, it is in the garage waiting the time, but with the time approaching I thought I would send our a request and get some info before I jumped on it. Thanks - KS4EC - Rob Robert Pease P No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced. Think before you print! Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. . -- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer.
[Repeater-Builder] Re: MSF-5000 information needed
I would encourage ya'llto get the proper manual for the vhf msf-5000. The PS puts out 28v and 14v, with the 125 watt and higher pa's needing 28v. The low level drive pa between the two vco's will put our 1 to 9 watts, happier at 2-4 watts. RB website has some msf articles to trick the llpa to a given power out. . . Bill Atlanta . . . . --- In Repeater-Builder@yahoogroups.com, Ralph S. Turk w7...@... wrote: Looking for more information on the Control Head. I have several CXB's without PA's. I will be using a Micor PA with external circulator. Looking for information on the feed back comming from a MSF PA to the exciter. Ralph - Original Message - From: wb6dgn wb6...@... To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 7:55:02 PM Subject: [Repeater-Builder] Re: MSF-5000 information needed The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt source and two lower current 13.8 volt sources, fused at 6.3 amps each. There is also decoupling and filtering on a distribution board which also provides overvoltage and overcurrent protection. Depending on your 12 volt source, you may want to find a parts donor power supply and adapt that distribution board to suit your needs. The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts, however. One thing that you will need, however is what Motorola calls the Low Power Control Head. This is a rather deceptive name for a rather simple device that senses forward and reflected power and sends that information to the power control circuitry in the RF tray. This information is normally located on one of the RF amps. (I forgot which) but when the PA's are not used, the control head performs that function. Schematics of the power supplies and the control head should be on Repeater Builder TIP pages or they can be found in most of the MSF service manuals. Good luck, Tom DGN --- In Repeater-Builder@yahoogroups.com , Robert Pease robp@ wrote: I was given an MSF-5000 for VHF, without the power supply or the PA, just the rf deck and the control deck. I want to use it for a small on site repeater for linking in an EmCom vehicle. My understanding is that it will put out about 5 watts without the PA. Are there any problems with using it this way and what do I need for DC power, I would love to run it directly off the 12V battery bank that runs the other equipment. I haven't even started looking at it, it is in the garage waiting the time, but with the time approaching I thought I would send our a request and get some info before I jumped on it. Thanks - KS4EC - Rob Robert Pease P No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced. Think before you print! Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. . -- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer.
RE: [Repeater-Builder] Ruggedised panel antennas
Gareth, If it's of any help I have two new/old stock heavy duty Scala yagis available in the 460-470Mhz range. These are in the factory radomes as well. I'm looking to get rid of them because I don't think I'll ever use them. Reply directly to me if interested. Gary R. California _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gareth Bennett Sent: Tuesday, July 06, 2010 10:25 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Ruggedised panel antennas Hi Group, I'm just wondering if anybody has an alternative to Katherin-Scala for heavy duty radomed panel antennas in the 450-500 MHz band at around 10dBi gain that will stand up to the abuse of an alpine site (2Km ASL) Just after feedback and opinions Cheers Gareth Bennett RadioSystems Limited P.O. Box 5202 Dunedin 9024 New Zealand DDI: (03) 489 1101 FAX: (03) 489 1151 MOB: (0224) 588 377 gare...@radsys.co.nz - Original Message - From: Oz-in-DFW mailto:li...@ozindfw.net To: Repeater-Builder@yahoogroups.com Sent: Wednesday, July 07, 2010 10:07 AM Subject: Re: [Repeater-Builder] Proto boards Or: http://www.wa5vjb.com/products4.html 6.5 by 4.25 Large Proto Board $5 3.75 by 2.75 Small Proto Board $3 Kent is also a source of economical built-to-spec preamps. -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport)
RE: [Repeater-Builder] Ruggedised panel antennas
Happens to juniors too! Kb0wlf Sent from my Pascal’s Analytical Engine From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jack Chomley Sent: Wednesday, July 07, 2010 4:05 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Ruggedised panel antennas Ahem..senior moment!! Sent from my Apple iPad Tablet PC On Jul 7, 2010, at 10:49 PM, wd8chl wd8...@gmail.com wrote: On 7/7/2010 2:32 AM, Jack Chomley wrote: Try the Polar Electronics Sector Coverage Panel Antenna model 375A. At 10dBd it a little short on gain but. Web site www.polarelectronics.com.au Cheers, Jack. VK4JRC Except that 10 dBd is a little more then 2db gain over the 10 dBi he spec'd! On Jul 7, 2010, at 3:24 PM, Gareth Bennettgare...@es.co.nz wrote: ? Hi Group, I'm just wondering if anybody has an alternative to Katherin-Scala for heavy duty radomed panel antennas in the 450-500 MHz band at around 10dBi gain that will stand up to the abuse of an alpine site (2Km ASL) http://geo.yahoo.com/serv?s=97359714/grpId=104168/grpspId=1705063108/msgId=101684/stime=1278506874/nc1=6083913/nc2=4025338/nc3=5733767 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.439 / Virus Database: 271.1.1/2962 - Release Date: 07/07/10 06:36:00
[Repeater-Builder] Re: MSF-5000 information needed
Bill, The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts... What part of below 150 watts don't you understand? The IPA in the RF tray IS the PA for the low power station and it needs feedback for power leveling with variations in line voltage and drive. This is where the low power control head has it's function. Yes, all you need is a voltage divider to provide feedback to trick the low power PA, but in doing so, you forfeit the power leveling features designed into the power control circuitry; NOT a good idea. Like any endeavor, there is the quick way and there is the right way. Tom DGN --- In Repeater-Builder@yahoogroups.com, Bill jawjabill...@... wrote: I would encourage ya'llto get the proper manual for the vhf msf-5000. The PS puts out 28v and 14v, with the 125 watt and higher pa's needing 28v. The low level drive pa between the two vco's will put our 1 to 9 watts, happier at 2-4 watts. RB website has some msf articles to trick the llpa to a given power out. . . Bill Atlanta . . . . --- In Repeater-Builder@yahoogroups.com, Ralph S. Turk w7hsg@ wrote: Looking for more information on the Control Head. I have several CXB's without PA's. I will be using a Micor PA with external circulator. Looking for information on the feed back comming from a MSF PA to the exciter. Ralph - Original Message - From: wb6dgn wb6dgn@ To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 7:55:02 PM Subject: [Repeater-Builder] Re: MSF-5000 information needed The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt source and two lower current 13.8 volt sources, fused at 6.3 amps each. There is also decoupling and filtering on a distribution board which also provides overvoltage and overcurrent protection. Depending on your 12 volt source, you may want to find a parts donor power supply and adapt that distribution board to suit your needs. The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts, however. One thing that you will need, however is what Motorola calls the Low Power Control Head. This is a rather deceptive name for a rather simple device that senses forward and reflected power and sends that information to the power control circuitry in the RF tray. This information is normally located on one of the RF amps. (I forgot which) but when the PA's are not used, the control head performs that function. Schematics of the power supplies and the control head should be on Repeater Builder TIP pages or they can be found in most of the MSF service manuals. Good luck, Tom DGN --- In Repeater-Builder@yahoogroups.com , Robert Pease robp@ wrote: I was given an MSF-5000 for VHF, without the power supply or the PA, just the rf deck and the control deck. I want to use it for a small on site repeater for linking in an EmCom vehicle. My understanding is that it will put out about 5 watts without the PA. Are there any problems with using it this way and what do I need for DC power, I would love to run it directly off the 12V battery bank that runs the other equipment. I haven't even started looking at it, it is in the garage waiting the time, but with the time approaching I thought I would send our a request and get some info before I jumped on it. Thanks - KS4EC - Rob Robert Pease P No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced. Think before you print! Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. . -- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to this message and please delete it from your computer.
[Repeater-Builder] Re: MSF-5000 information needed
Bill, The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts... What part of below 150 watts don't you understand? And, yeah, I was off by 25 watts; so sue me! That's irrelevant anyhow, the OP was talking about a 5 or 6 watt station in the first place! The IPA in the RF tray IS the PA for the low power station and it needs feedback for power leveling with variations in line voltage and drive. This is where the low power control head has it's function. Yes, all you need is a voltage divider to provide feedback to trick the low power PA, but in doing so, you forfeit the power leveling features designed into the power control circuitry; NOT a good idea. Like any endeavor, there is the quick way and there is the right way. Tom DGN --- In Repeater-Builder@yahoogroups.com, Bill jawjabill...@... wrote: I would encourage ya'llto get the proper manual for the vhf msf-5000. The PS puts out 28v and 14v, with the 125 watt and higher pa's needing 28v. The low level drive pa between the two vco's will put our 1 to 9 watts, happier at 2-4 watts. RB website has some msf articles to trick the llpa to a given power out. . . Bill Atlanta . . . . --- In Repeater-Builder@yahoogroups.com, Ralph S. Turk w7hsg@ wrote: Looking for more information on the Control Head. I have several CXB's without PA's. I will be using a Micor PA with external circulator. Looking for information on the feed back comming from a MSF PA to the exciter. Ralph - Original Message - From: wb6dgn wb6dgn@ To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 7:55:02 PM Subject: [Repeater-Builder] Re: MSF-5000 information needed The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt source and two lower current 13.8 volt sources, fused at 6.3 amps each. There is also decoupling and filtering on a distribution board which also provides overvoltage and overcurrent protection. Depending on your 12 volt source, you may want to find a parts donor power supply and adapt that distribution board to suit your needs. The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts, however. One thing that you will need, however is what Motorola calls the Low Power Control Head. This is a rather deceptive name for a rather simple device that senses forward and reflected power and sends that information to the power control circuitry in the RF tray. This information is normally located on one of the RF amps. (I forgot which) but when the PA's are not used, the control head performs that function. Schematics of the power supplies and the control head should be on Repeater Builder TIP pages or they can be found in most of the MSF service manuals. Good luck, Tom DGN --- In Repeater-Builder@yahoogroups.com , Robert Pease robp@ wrote: I was given an MSF-5000 for VHF, without the power supply or the PA, just the rf deck and the control deck. I want to use it for a small on site repeater for linking in an EmCom vehicle. My understanding is that it will put out about 5 watts without the PA. Are there any problems with using it this way and what do I need for DC power, I would love to run it directly off the 12V battery bank that runs the other equipment. I haven't even started looking at it, it is in the garage waiting the time, but with the time approaching I thought I would send our a request and get some info before I jumped on it. Thanks - KS4EC - Rob Robert Pease P No trees were killed in the sending of this message. However a large number of electrons were terribly inconvenienced. Think before you print! Since 1974, the award-winning Alpert JFCS has helped families of all faiths throughout most of Palm Beach County, FL, via counseling, seniors services, residences for the disabled, mentoring children, support groups and a lot more. SOLUTIONS FOR LIVING www.JFCSonline.com Please take note of our new website and E-Mail Addresses. Please update your contacts ASAP. . -- NOTICE: This e-mail message and all attachments transmitted with it are intended solely for the use of the addressee and may contain legally privileged and confidential information. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, copying, or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender
