RE: [Repeater-Builder] Duplexer Identification
At 1/10/2006 16:11, you wrote: >The 522-509 is an odd creature. There are two pass and two notch on the >transmitter side, and one pass and one notch on the receiver side. >Discussions about this duplexer came up a while back on this list - >maybe it's in the archives? I think Bob NO6B posted measured >performance of one he put on the bench. > > --- Jeff > Search the archives for messsage #s 30754, 30761 & 30773. Bob NO6B Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Repeater Questions
--- In Repeater-Builder@yahoogroups.com, JOHN MACKEY <[EMAIL PROTECTED]> wrote: > > I once use a GP-9 for a repeater antenna, was not happy with the performance. > But one thing you can do to help is REMOVE all the set schrews for each > section, & then fill them up with solder. 10 years later, my antenna was > still operating as well as the first day (which isn't saying much). I was thinking about doing exactly that, this morning :) Makes disassembly a little difficult though, if you don't remember to bring the soldering iron. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Duplexer building
It looks like I will soon own some scrap copper or brass rigid coax. This is 3 to 4 inches in diameter, in 20 feet lengths with flanges on both ends. The TV station that I work for is going to be scrapping this. Does anyone have a need for some to possibly make UHF or higher duplexers/filters out of? I will have to cut these at least once to haul it from the transmitter site. If there is any interest, I will get the actual measurements and dispose of it here rather than the scrap yard. Will be asking scrap prices plus postage and a little for the fuel to transport and packing. Let me know if you can use any of this. 73 Glenn WB4UIV Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Maxtrac outputs?
--- In Repeater-Builder@yahoogroups.com, Kris Kirby <[EMAIL PROTECTED]> wrote: "How much current can the Maxtrac GPIO outputs sink for a low condition? Are they open collector or ... ?" _ Pin 4 - Programmable Output OnlyThis is a radio output port. It is an open collector output which saturates to A+ supply when active. It is normally used to drive an external relay or sense lead. It duplicates the function of J3-3 of the five pin logic board. When active it can source a maximum current of 250 mA. The pin has a 10 K ohm resistor tie-down to ground on the logic board. Pins 8, 12, 14 - Programmable Bidirectional These are radio input/output ports. The output circuit is an open collector MMBT3904 surface mount transistor which saturates to ground. It can sink a maximum of 200 mA. The zero level will be 0.3 V max. As an input, a voltage between 3 and 16 volts is recognized as a logic high and less than 1 volt is recognized as a logic low. The input has a slow rise time constant of 1.0 msec. These pins have a 4.7 K ohm resistor tie-up to 5 Volts on the logic board. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] narrowband repeaters
Hi Group, I live in an area that has lots of wideband UHF repeaters across the US-MEX border, about 60 miles away. They mostly operate wideband. I am thinking of using narrowband in order to squeeze inbetween them. However, I have absolutely no experience in narrowband operation, especially in the RF vicinity of wideband stuff. So, will it work? Does NB get much interference from adjancent WB users? What about compandoring, is it necessary? Most of my UHF radios do not have it. Thanks for the help, Tracy Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Duplexer Identification
Bob,Jeff thanks. I'll browse the archives and see what I find. If not I'll try the new "RFS/Celwave" for info. Andy Yahoo! Photos Got holiday prints? See all the ways to get quality prints in your hands ASAP. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] OT - funny interference story
This is a funny story from the Broadcast Engineering mail list... -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ron Castro Sent: Tuesday, January 10, 2006 12:31 PM To: Broadcast Radio Technical Forum Subject: Re: [RT] Re: Local interference issues and lawyers We had a case many years ago here in Santa Rosa where an FM station moved its transmitter and a neighbor, who was a wealthy doctor, started complaining of major TV interference on all channels, and he demanded that the station stop transmitting and go away. The station owner could see that doctor's TV antenna was in very poor condition, and he offered to replace it for free, the was turned down. The doctor complained bitterly and regularly to the FCC until an inspector finally came out. The inspector pronounced the FM station clean, but he could see some other source of local interference in the area on his spectrum analyzer. Turns out it was the doctor's Radio Shack pre-amp on his broken-down antenna that had gone into self-oscillation and was cleaning out the whole neighborhood! By this time, the FCC had such a craw-full of the doctor that they issued him an NAL for causing interference. Ron Castro Chief Technical Officer Results Radio, LLC Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: had a little power supply trouble the otherday...
Chuck Kelsey wrote: > Many fire departments have a camcorder on the rig. > > Chuck > WB2EDV I doubt it had been going that long that they were already there, but maybe. Actually looking at the video, it looks like it's at the edge of a golf course... the "nicely trimmed" trees and bushes someone mentioned. The camcorder was probably in someone's golf bag -- if I had to guess. However... you do hear a dispatcher's voice at the very end of the video... starting an "all units" call. Whether that's coming from a lone policeman's radio nearby the video shooter, or from a radio on a firefighter already there, is hard to tell from the video. Nate WY0X Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: had a little power supply trouble the otherday...
- Original Message - From: "Jeff DePolo" <[EMAIL PROTECTED]> > > What I'd like to know is how/why there was someone videotaping a > substation? Seems kinda fishy... > > --- Jeff > Jeff, Like many people I carry my video camera with me all the time. You never know when something will happen, and you could be the only person with a camera when it happens. getting you the Million Dollar prize for getting it on film. Charles Miller Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] new bp cavities
Hi I have bought a new rfs band pass cavity and I am just checking about tuning it .it was advertised to work from 400-500 mhz but when I apply a signal around 480 mhz through it it doesn't seem to improve the filtering .When new do the elements inside need to be cut to suit the frequency .My frequency I want it to let through the filter is around 481mhz ?.I have seen other BP filters here and they have a shorter elements than this new tin . Thank You, Ian Wells, Kerinvale Comaudio, www.kerinvalecomaudio.com.au YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] UPDATE!>Re: Help / suggestion needed...feedback? on Mitrek
Well,the suggestions to check the power setting evidently has helped. We increased the power to 30W after lunch today and no more noise this afternoon. We have taked on it for 15-20 minutes at a time, several times, then let it rest and do it's voice ID, and no noise. Cross your fingers, looks like this puppy is ready to go to it's permanent home in Decatur TN atop No Pone Ridge! Thanks for the help! Scott NA4IT Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Duplexer Identification
The 522-509 is an odd creature. There are two pass and two notch on the transmitter side, and one pass and one notch on the receiver side. Discussions about this duplexer came up a while back on this list - maybe it's in the archives? I think Bob NO6B posted measured performance of one he put on the bench. --- Jeff > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Andrew > Sent: Tuesday, January 10, 2006 6:45 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Duplexer Identification > > > I have a Phelps Dodge/Celwave PD-522-509 according to the factory > label. I cannot find any info on this duplexer anywhere, does > somebody > have the specs of this duplexer set? It almost looks like a PD-526 > without the Band Reject ADJ, but has the 4 RX/TX/TX,RX ports on the > top. Thanks for any help. > > Andy > > > > > > > > > > Yahoo! Groups Links > > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.371 / Virus Database: 267.14.16/225 - Release > Date: 1/9/2006 > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.16/225 - Release Date: 1/9/2006 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] audio delays
greenfin2002 wrote: > am using a 440 hub repeater to link 2 vhf repeaters. everything worked > except the normal squelch crash. i then added audio delay boards to > fix this now when i unkey from vhf repeaters i hear an echo. usally > the last 2 or 3 letters of the last word that was spoken. looking for > ideas.thanks pat You're delaying the audio and the keyup toward the link hub, and then delaying again at the link hub, so your receiver at the two 2m repeaters is hearing that last few hundred milliseconds of audio coming back from the link hub after all the delays. I saw Kevin's reply and noted that he said the Maggiore's have very slow squelch circuits. One thought came to mind: In your CAT controllers, are there any macros like in the S-Com controllers? (I know nothing about CAT controllers.) If so, you could trigger a macro to disable the receiver that listens to the link hub's transmitter when the main receiver port goes active and KEEP it disabled for a couple hundred (however many you need) miliseconds after the user unkeys on the 2m repeater? That would keep you from hearing your echo come back. Of course, all this delay adds up to really slow switching and turn-around times for a conversation end-to-end if you have to do something like that. Another design flaw with that option is that the above would also make it impossible for you to send any control DTMF to the 2m repeater from either the link hub or the other 2m repeater while it was transmitting. What CTCSS encoders and decoders are you using? If you could use something that would transmit a proper "reverse-burst" on the link radios to the UHF repeater, and the tone decoder there also knew how to decode it, and it would slam the receiver closed as soon as it heard the phase-shift, you could remove the audio delay board at the hub repeater completely. No squelch crashes would happen there, and you'd be getting rid of your user squelch crashes at the user repeaters. This assumes that the UHF hub is only used for linking, and no users talk through it. If you did the "reverse-burst" thing and people on non-commercial radios talk through the hub repeater, you'd hear a squelch crash on them, but not on the users from 2m. Nate WY0X Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Duplexer Identification
I have a Phelps Dodge/Celwave PD-522-509 according to the factory label. I cannot find any info on this duplexer anywhere, does somebody have the specs of this duplexer set? It almost looks like a PD-526 without the Band Reject ADJ, but has the 4 RX/TX/TX,RX ports on the top. Thanks for any help. Andy Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Repeater Questions
I once use a GP-9 for a repeater antenna, was not happy with the performance. But one thing you can do to help is REMOVE all the set schrews for each section, & then fill them up with solder. 10 years later, my antenna was still operating as well as the first day (which isn't saying much). -- Original Message -- Received: Tue, 10 Jan 2006 11:59:27 AM CST From: "Dave VanHorn" <[EMAIL PROTECTED]> To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Repeater Questions > > > Do the systems properly duplex on a dummy load? How about a dummy on > > the antenna port of the diplexer? > > If the answer is yes to both (3), then I'd replace the antenna (as I > > have had folks complain to me that the GP-9 doesn't duplex well after > > its been up a while) and/or read this: > > http://www.repeater-builder.com/antenna/cracking.html > > > We had a crackling noise on our system.. Turned out that when the > previous owners put up the GP-9, they didn't bother with the screws > that connect the three internal sections. They weren't loose, they > just weren't there! > > I would advise a drop of loctite blue on those, to keep temperature > cycling from loosening them on you. > > Also, some of the components in the GP-9 are a bit cheesy, thin leads > on little boards.. > > > > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: Visio Schematics (Was Using Visio for Rack Planning)
I've used AutoCAD for several years now. I drew several equipment racks last and inserted DXF's of various equipment, amplifiers, network devices, etc. Things are a little tougher when CAD drawings for various pieces of equipment don't exist, but people would post what they have into the Files area of the various radio groups, we could build a collection. :) That goes for any template files for any program, such as AutoCAD or Visio. Have fun! Chris N9XCR - Original Message - From: "Dave VanHorn" <[EMAIL PROTECTED]> To: Sent: Tuesday, January 10, 2006 11:53 AM Subject: [Repeater-Builder] Re: Visio Schematics (Was Using Visio for Rack Planning) > > > Another option would be to go to a site like > > http://www.symbols.net/electrical/ and dump the .gifs > > into Visio and add connectors for easier wire routing. > > Hmm.. Ransom note schematics :) > > > Also, Orcad has a demo version available for download > > that should work great if all you want to do is draw > > schematics. It's here: > > EWW.. EEEVIL.. I have a $10,000 licenced copy of capture, and > layout. It's in a pile with the excess AOL disks. > > I've used orcad since '87. I still do. I run the LAST non-windows > version they made. I also run the dos-orcad group on yahoo. > A surprising number of people have tried the new stuff, and given up > on it. > > No, what I'm after is planning the mechanical layout. > I have done some "faked" versions with visio, stretching rack panels > to the size I need, which is good enough, but I'd like to do some > templates that actually look like the gear in question, to help me > plan cable lengths and wire routing. > > > > > > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: audio delays
> Your delay may be way too long. You only need about > 1/4 to 1/2 second of delay, depending on how fast your > radio can squelch up. Definitely sounds like he needs to back off on the delay. I once had my Arcom delays set to max.. It was pretty funny, although it DOES train you to hold the key a moment after you quit talking :) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Repeater Questions
> Do the systems properly duplex on a dummy load? How about a dummy on > the antenna port of the diplexer? > If the answer is yes to both (3), then I'd replace the antenna (as I > have had folks complain to me that the GP-9 doesn't duplex well after > its been up a while) and/or read this: > http://www.repeater-builder.com/antenna/cracking.html We had a crackling noise on our system.. Turned out that when the previous owners put up the GP-9, they didn't bother with the screws that connect the three internal sections. They weren't loose, they just weren't there! I would advise a drop of loctite blue on those, to keep temperature cycling from loosening them on you. Also, some of the components in the GP-9 are a bit cheesy, thin leads on little boards.. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Visio Schematics (Was Using Visio for Rack Planning)
> Another option would be to go to a site like > http://www.symbols.net/electrical/ and dump the .gifs > into Visio and add connectors for easier wire routing. Hmm.. Ransom note schematics :) > Also, Orcad has a demo version available for download > that should work great if all you want to do is draw > schematics. It's here: EWW.. EEEVIL.. I have a $10,000 licenced copy of capture, and layout. It's in a pile with the excess AOL disks. I've used orcad since '87. I still do. I run the LAST non-windows version they made. I also run the dos-orcad group on yahoo. A surprising number of people have tried the new stuff, and given up on it. No, what I'm after is planning the mechanical layout. I have done some "faked" versions with visio, stretching rack panels to the size I need, which is good enough, but I'd like to do some templates that actually look like the gear in question, to help me plan cable lengths and wire routing. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Building repeater....
You've got a big project there. What is it exactly that you're looking to learn? I'm asking, because you seem to want to take on a LOT of issues, which may leave you broke and discouraged in the end. If I were you, I'd start off with a repeater controller, a relatively straightforward firmware project with a little hardware interfacing. I'd use existing radio hardware for that section. Then I might try my hand at a transmitter design, and learn just how critical things are, and all the ways that a transmitter can get you into trouble. :) Receiver design is another bunch of fun, and repeaters have some issues that are especially important with regards to how large undesired signals affect it. I've done a simple repeater controller in an Atmel Tiny-11 ($0.25), using only it's 32 registers and small rom. (no ram in this part) Out of that I was able to get COR debounce, kerchunk filtering, timeout timer, ID timer, hang timer, CWID (translating ASCII text in rom to CW) and multitone courtesy beep. External hardware was a pot, keying transistor, and a few R's and C's. I didn't even need a crystal and caps since I was able to use the on-board R/C oscillator. Personally, I avoid the PIC, it's internal "architecture" makes life rather complicated, and it's a relatively slow machine. If you'd like to see what CAN be done, have a look at the Arcom RC- 210 controller. This runs on an AVR Mega-128 part. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: had a little power supply trouble the otherday...
Many fire departments have a camcorder on the rig. Chuck WB2EDV Jeff DePolo wrote: > >What I'd like to know is how/why there was someone videotaping a >substation? Seems kinda fishy... > > --- Jeff > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Need VHF Mitrek and Service Manual ~ Need Wiring Harness
Well I picked up a 60 watt Mitrek with 4 sets of channel elements at the magic price (free) locally. Now I need the wiring harness for it, anyone have a spare Mitrek Wiring Harness they could part with? Let me know, thanks. Alexander Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] [Fwd: For Sale: Clegg FM-76]
Original Message Subject: For Sale: Clegg FM-76 Date: Tue, 10 Jan 2006 10:28:49 -0500 Organization: INSTRUCOM, INC. To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> Hello All: Need to get rid of some things around here not being utilized. One of them is the subject Clegg FM-76 Transceiver, 220 MHz band. A manual copy comes with it, and there is no mike. This unit does put out the specified power and the receiver operates fine. Loaded with crystals. #1 223.50 Simplex, #2 Blank, #3 222.34/223.74, #4 222.30/223.90, #5 223.34/224.94, #6 223.22/224.82, #7 Blank, #8 223.160/224.76, #9 222.70/224.300, #10 224.30/222.70, #11 222.98/224.58, #12 222.94/224.54. I'm not sure of all these crystal frequencies since it was difficult to read them all. Asking $80.00. You pay shipping. Please contact me off list at Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Building repeater....
Hello! I would like to build UHF repeater, controlled with PIC micro. I have some ideas, and i would like t share it, but i also need a help. Firts of all, problem is filter for receiver. i want to use external duplexer, so i can use same schematic with small exchange on it and in firmware, so it could be used as regular transceiver. after filter (which is problem), i would use BFG520 as first amp. next stage would be filter, controlled with varicap diodes (this filter is also a little bit problematic...). Mixer would be 3SK241. First idea was to use 10.7MHz IF, because, i have really good filters. Is this good idea? Or maybe to try to go @ 44.775MHz??? Receiver would be classic with MC3372 and murata filter for 455khz CFS455D VCO would be classic, Colpits with 2SC4226, and PLL LMX2306 Which is best reference frquency to choose for PLL? For transmitter would use same PLL and VCO, in other box. Output stage would be with mitsubishi hybrid IC. PIC16F877 would be controlling PLL, signalling (FX828), ID, D/A converter for varicap diodes, and could be programmed via simple terminal software. I used Eaglewares GENESYS to simulate, but i cannot get satisfying results. If anyone is interested, i can drop him schematic (in pcad2002 format, or PS format) Thanks in advance for help! Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Repeater Questions
--- In Repeater-Builder@yahoogroups.com, Kevin Custer <[EMAIL PROTECTED]> wrote: > Do the systems properly duplex on a dummy load? How about a dummy on > the antenna port of the diplexer? > If the answer is yes to both (3), then I'd replace the antenna (as I > have had folks complain to me that the GP-9 doesn't duplex well after > its been up a while) and/or read this: > http://www.repeater-builder.com/antenna/cracking.html > > The diplexer should not be eliminated, however it should be replaced > (with a commercial version) if defective. > > Kevin > Hi Kevin, Thank you for the reply. I had read the link you provided before. In fact, that is where some of my questions were coming from. Our setup had worked flawlessly for a long time, until recently we made a change on the VHF repeater from a converted Micor mobile to the MSF5000. That setup worked great for a short time until we had to take the VHF MSF5000 back out of line to fix another, non related issue. We put the Micor back in line, during that period, and that is when we started having the problems. The Micor could hardly be heard. The signal strength was almost nil, and very scratchy. Then, one day, it just came alive and worked great for a couple weeks, then it went right back to the old problem again. We fixed the issue with the MSF and put it back in line. It works great most of the time. Then, it will get scratchy at times. Not to the point of disrupting communications (as it would with the Micor), but enough to become irritating. Then, it might go for a day or two, then get scratchy. As in your article, the ID, digital voice announcements, and hang timer carrier would be all clean, and clear during this scratch problem. I need to get back to the site and check the additional items you and msf5kguru, from his post suggested. (Thanks Bob) I'm suspecting the antenna, but I wanted to make sure I'm going in the right direction. We probably really need to look at a second antenna / feedline. Gary Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Tenuline Coaxial Attenuator
Title: Message Yes I'm interested. Is the 30Db switchable? Tim On Mon, 9 Jan 2006 22:51:53 -0700 "Ed Flipsen" <[EMAIL PROTECTED]> writes: I have 3 of these for sale $55 each contact me off list ... here are the Spec's BIRD COAXIAL ATTENUATOR “N” TENULINE • Model: 8321 • Impedance: 50 ohms • Frequency: DC - 500MHz • Attenuation: 30db • Power: 50Watts RF Continuous • Weight: 6.5 lbs (2.9Kg) • Size: 10-11/32"L X 3-15/16"W X 6-11/32H (225mm x 150mm x 87mm) • Connectors: Input “N” Female (QC) Output “N” Female (QC) Ed VA6EF The difficult I do right awayThe Impossible takes me a little longerIf you can read this you ' re having a good day your aliveI hope life isn"t a big joke, because I don"t get ItI will not go quietly into the nightThanks uncle JED its been FunNever be afraid to try something new.Remember, amateurs built the ark.Professionals built the Titanic.Ed FlipsenCNA 5.0CCNAMCSE WINNT 4.0MCP WIN 95 , MCP Exchange Server 5.5Network + A + Inet+FLEXT SYSTEMS COMPUTER SERVICE and SALESPHONE 780 872 0622 YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Re: had a little power supply trouble the otherday...
On Tue, 10 Jan 2006 08:50:08 -0500, Jeff DePolo wrote: >What I'd like to know is how/why there was someone videotaping a >substation? Seems kinda fishy... We had one (a smaller one) blow here a few years ago, and it "percolated" for quite some time. The noise brought out many home owners along with their video cameras. I think we saw just the final few minutes of the occurrence and noting the well groomed trees, it wasn't too far away from some homes. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: Using Visio for rack planning
Another quick n' dirty way to lay out racks is to use Excel. Re-size the width of a column to make it approximately the same height-to-width ratio such that one cell is about the size of 1 RU. Select the number of cells to equal the number of rack spaces you have available, put a fat border around the outside of those cells, and then start filling in the contents of the rack. Use "merge cells" to make 2U, 3U, 4U, etc. panels as necessary. Middle Atlantic (a rack enclosure manufacturer) has some free software called "Rack Tools" or something like that for laying out racks. www.middleatlantic.com. I remember trying it once but for some reason didn't spend much time with it. --- Jeff > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Dave VanHorn > Sent: Sunday, January 08, 2006 6:08 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: Using Visio for rack planning > > > > > These may help - they are more suited to IT stuff, but you > can name a > > 1, 2, 3, 4, 5 or 6 unit rack panel anything you want... a > duplexer, a > > battery tray, etc. > > Thanks. Yes, that's what I've been doing.. I may have to figure out > how to do my own shapes, there can't be THAT much to it. > > > > > > > > > > Yahoo! Groups Links > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.371 / Virus Database: 267.14.15/223 - Release > Date: 1/6/2006 > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.15/223 - Release Date: 1/6/2006 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: had a little power supply trouble the otherday...
> Most Sub station transformers like the one in the video > which form the looks of the bushing size is at least 69kv > or possible 138kv normally have fuseing on the High voltage > size and then go to buss work and feed distribution breakers > for the journy out to the line system so for my 2 cents > worth i would have to say there was an equiment failure on > the lower voltage side of the transformer and that could be > anywhere from 4kv which in getting scarce up to 13.8kv which > caust a failure on the transformer tank that lead to the > massive fire ball that followed what looked to be some kinda > liquid spraying toward the arc and from what was stated > earlier in the posting it can take several days to put that > kind of fire out once it gets going good 1st because you > cant get at it because the heat > 2nd from working with fire instructors and hearing the > stories they had to tell about fires when there were old > trandfomers being scrapped out and got lit off from a cutting > torch 1 they worked several days to control I'd say your guess as to what happens was pretty close. Here's the text that accompanied the video: A power arc to ground on the Low Voltage side of this substation creates an arcing fault that behaves like an uncontrollable welding torch from Hell, chewing up everything in its path. Protection hardware either fails to open the High Voltage side or is unable to sense the presence of the fault. Excessive current eventually causes the windings on the substation's power transformer to overheat, severely cooking its innards and causing the mineral oil inside to begin violently boiling. In a vain attempt to prevent the transformer's tank from exploding, pressure release valves vent clouds of superheated oil vapor which subsequently ignites and explodes in a ball of flame. A phase to phase short circuit occurs, perhaps caused by a flashover within the flames or a heat induced fault within the transformer. This causes an expulsion fuse to blow with a flash and a resounding BANG, finally killing power to the substation. However, by this time, the weakened transformer's tank fails, and it spills hundreds of gallons of flaming mineral oil onto the already devastated substation. Local firefighters can only watch from a distance since there's no way to safely fight this fire, and the substation is a total loss. As one fireman quipped, "Firemen don't mess with their wires, and linemen don't mess with their fires". A very sobering look at the explosive power silently lurking within the quietly humming substation in your neighborhood... What I'd like to know is how/why there was someone videotaping a substation? Seems kinda fishy... --- Jeff -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.15/223 - Release Date: 1/6/2006 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: had a little power supply trouble the otherday...
On Tue, 10 Jan 2006 03:38:37 -, fire22pa wrote: >Most Sub station transformers like the one in the video which form >the looks of the bushing size is at least Whew..the period key is 2 to the right of the M key :) Sorry, but I got out of breath just reading it. Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] audio delays
> > >> greenfin2002 wrote: >> >> am using a 440 hub repeater to link 2 vhf repeaters. everything >> worked except the normal squelch crash. i then added audio delay >> boards to fix this now when i unkey from vhf repeaters i hear an >> echo. usally the last 2 or 3 letters of the last word that was >> spoken. looking for ideas. >> thanks pat > > > What kink of repeaters? > What kind of controllers? > Are you using PL (ctcss)? > If you are using PL, are you "and squelch" gating the audio? (you may > not know the answer to this) > > Kevin greenfin2002 wrote: >cat and arcom controllers using pls on recieve on all 3 repeaters pl encode on >hub and pl recieve on one link radio and one link radio does not as it does >not decode-kenwood g707. the machines are maggiore. cat 300dxl is hub >controller. pat > It appears that you are hearing the compounding delay of the audio as it propagates through more than one repeater (the link and the hub). If your delays have programmable time, try using the shortest delay you can, everywhere. The best thing would be to add a faster carrier squelch to the Maggiore repeater and insure the controllers are processing the receivers COS and PL logic as "AND Squelch". The utilization of the RLC-MOT carrier squelch board would insure the fastest squelch on signals above about 20 dB C/N (generally good), and using a small amount of delay would completely eliminate any squelch crash during normal good quieting transmissions. The problem is likely the Maggiore has a long carrier squelch time constant, and you are having to use a lengthy delay time to compensate for it. Hope this helps... Kevin Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Tenuline Coaxial Attenuator
Title: Message I have 3 of these for sale $55 each contact me off list ... here are the Spec's BIRD COAXIAL ATTENUATOR “N” TENULINE • Model: 8321 • Impedance: 50 ohms • Frequency: DC - 500MHz • Attenuation: 30db • Power: 50Watts RF Continuous • Weight: 6.5 lbs (2.9Kg) • Size: 10-11/32"L X 3-15/16"W X 6-11/32H (225mm x 150mm x 87mm) • Connectors: Input “N” Female (QC) Output “N” Female (QC) Ed VA6EF The difficult I do right awayThe Impossible takes me a little longerIf you can read this you ' re having a good day your aliveI hope life isn"t a big joke, because I don"t get ItI will not go quietly into the nightThanks uncle JED its been FunNever be afraid to try something new.Remember, amateurs built the ark.Professionals built the Titanic.Ed FlipsenCNA 5.0CCNAMCSE WINNT 4.0MCP WIN 95 , MCP Exchange Server 5.5Network + A + Inet+FLEXT SYSTEMS COMPUTER SERVICE and SALESPHONE 780 872 0622 YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
