[Repeater-Builder] Re: Micor squelch chip vs other options (detection time)
--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote: > Thanks Bob, > > I was hoping to find a clean control with <3mS, > which means the Micor Chip will probably work. > > Someone posted a blurb about working with the S-Com 7k > and it's relatively slow audio gating ... twas' that > you? > > skipp > It probably was. I noticed a definite short squelch "crash" when using a Micor squelch with a 7K. I had to pre-gate the discriminator audio before going to the controller to eliminate it. A very short audio delay from an ADM would also work, as the squelch tail was around 30 msec at most. 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: Dayton check list
--- In Repeater-Builder@yahoogroups.com, Dave VanHorn <[EMAIL PROTECTED]> wrote: > At 11:58 AM 5/18/2005, Ken Arck wrote: > > >At 12:56 PM 5/18/2005 -0400, you wrote: > > >Anyone taking bets on how high the gas prices will mysteriously raise > > >for the weekend? I'm betting $2.37. Not that it's gouging or anything. > > > ><---Only $2.37? That's less than we're paying here in Oregon now! > > regular is hovering around $2 here. Highest on my trip so far was Shoshone, CA (near Death Valley). $3.12 for regular. 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: CWID
--- In Repeater-Builder@yahoogroups.com, "Gary" <[EMAIL PROTECTED]> wrote: > Larry, > You might want to check out the ID-O-MATIC that is sold by N0AXS. > This little Kit will run you about $20 bucks and works like a champ! > Nice. Like the K1EL K-ID PIC but with the activity timer. Wish I had known about this one a month ago. > Look up N0AXS or ID-O-MATIC on your search engine and he has a > website where you can get this kit and other really neat items for > repeaters! www.hamgadgets.com > > I use this for an ID'er on one of my repeaters and it works as good > as any of the $500 controllers that I have! Just be careful with that square wave output. I built an 800 Hz BPF for the output of the K-ID; I'll post the schematic in a separate message. 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 Desense
--- In Repeater-Builder@yahoogroups.com, Kevin Custer <[EMAIL PROTECTED]> wrote: > Eric Lemmon wrote: > > >The most recent instance was with a Cushcraft ARX-270 2m/440 antenna. > > > > I tried one of these antennas first as a low profile repeater antenna, > then as a remote base antenna. I was so disappointed with it that I > took it down and threw it in the trash. Yes it was brand new. That > antenna will never bother me or anyone else again. I'm not a big fan of > Cushcraft antennas anyway, but whoever designed the ARX-270 didn't have > a clue Was that the antenna that was on your 146.625 Dayton repeater 2 years ago? I always wondered why it wasn't full quieting at the opposite end of the flea market while my portapeater on a mag. mount across the street was solid everywhere. 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: Speaking of Dayton...
--- In Repeater-Builder@yahoogroups.com, "Bob" <[EMAIL PROTECTED]> wrote: > I would be remiss if I didn't issue an invitation to my fellow > repeater-heads who are making the pilgrimage to the Mecca of > RF-Related-Stuff in Southwest Ohio next week to be sure to look for me. > > I'll be the middle-aged white guy with a pot-belly and an HT on my > belt...oh, and I may be wearing a baseball cap (thinning hair, dontcha > know). Yeah, that should narrow it down to, say, 20,000? I'll be wearing a bright orange LA Marathon Communications hat, or if the sun's out, a drab green floppy hat, & LA Marathon T-shirt. Will be on my portapeater (147.585 in/144.93 out, PL-141.3), Dave K.'s, or Kevin's if he brings one again & doesn't sell it while I'm still using it ;) 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: Xtal sources West Xtal
--- In Repeater-Builder@yahoogroups.com, Kevin Custer <[EMAIL PROTECTED]> wrote: > Bob Dengler wrote: > > >I believe ICM & Bomar only change these mid-range capacitors. > > > > I have purposely marked the TC caps in several MASTR II ICOM's and MICOR > channel elements before sending them to BOMAR. After they came back, > some units (in particular the GE ICOM's) had every TC capacitor > changed. It's actually easy to spot, as BOMAR's uses caps that are a > nice blue color All those caps in the ICOMs make them a PITA to do my PTC thermistor mod: they all have to come out! I've only moded one ICOM so far & I'm not sure I ever want to do another. Yet another reason for me to stick with MVPs, as the crystal modules only have 1 temperature-compensating cap, if any. Removing the slightly temperature-sensitive varactor improves the stability even further. 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 coax duplexer leads
--- In Repeater-Builder@yahoogroups.com, "Coy Hilton" <[EMAIL PROTECTED]> wrote: > > Yes, Run what ever it takes to get from the radio to the duplexer. > If the amp doesn't match the duplexer then build what some call a Z > matcher it is a Pi network and consists of 2 veriable caps and 1 > inductor. If an isolator is used between your TX & duplexer (always a good idea especially at comm sites; some site managers require their use), it doesn't matter what cable length you use. 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: Hamtronics, Inc.
--- In Repeater-Builder@yahoogroups.com, Neil McKie <[EMAIL PROTECTED]> wrote: > > Hello > > skipp025 wrote: > > ... snip ... > > > The Mitrek version of this bare bones radio was sold > > as a Motrek... same pc board, less parts. "Great taste, > > less filling". > > Then there is the GE MVP radios ... Missing Valuable Parts ... > > Neil - WA6KLA What "valuable parts"? Maybe 2 poles of IF filtering. Same IF board as the Mastr II, so that's easily added back in if needed. I've only bothered to do that on VHF MVPs that have to RX on 15 kHz-spaced channels. 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: 220 Repeater
--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ <[EMAIL PROTECTED]> wrote: > >A properly converted commercial radio might be better in > >the end, but is a lot more work. > > Also true - but try and find a 13-509 these days. Back in the > '80s there were many sources. These days the '509s are > scarce, and Mitreks are common. You work with what you > have or can get. > > Mike There's a Clegg FM-76 (same thing) on eBay right now (5745586858). Also a manual for same (5745122493). 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: 220 Repeater
--- In Repeater-Builder@yahoogroups.com, Mike Morris WA6ILQ <[EMAIL PROTECTED]> wrote: > > They were built as cheap as CBs of the era, and > on the same production lines. But we hams built > repeaters out of them because that's all there was. > This may be all true, but the proven track record of every 13-509 repeater & unmodified mobile radio I've worked with makes me conclude that they are perfectly acceptable for repeater use. I once tuned one up on a spectrum analyzer - couldn't make it go spurious even if I tried. > I really, really suggest that you look at Mitreks and similar > newer radios as 220 candidates. Kevin and Scott Z. have > spent untold hours perfecting the 220 Micor and Mastr-II > conversions and are GIVING AWAY their technology here. > A properly converted commercial radio might be better in the end, but is a lot more work. 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: 220 Repeater
--- In Repeater-Builder@yahoogroups.com, DCFluX <[EMAIL PROTECTED]> wrote: > I am intrested in the conversion procedure for the squelch, I am not > happy with the audio quality of the midland as well. I was working on > a new squelch board my self but too busy to sit down and build it then > write the software. One of the 2 13-509 repeaters I maintain was modified for "flat audio" (FM modulator, minimal processing). The other uses the stock phase modulator. I can't tell the difference between the two. They both sound good to me, but we had a problem with a 1.5 kHz rolloff at the discriminator. If you look at the schematic, you'll see a 1 K resistor on the discriminator output with a 0.1 uF cap to ground. My guess is that this was a poorly designed LPF to block the 455 kHz. We changed the .1 uF cap (C42) to .01 uF to fix this. As far as the squelch mod goes, here's what I have in my notes: C89: replace 4.7 uF with 1 uF or 0.33 uF (I think I used 1 uF; 0.33 uF made the squelch action a bit too choppy). C91: replace 4.7 uF with 0.47 uF Add a 1 megohm resistor between base of TR13 & collector of TR14. This adds hysterisis which allows the squelch tail to be shorter without chopping, similar to how the G.E. MVP squelch works. I have the board layout scanned & will try to post the 1 Mohm resistor location later. 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: EPLRS System gone/moved
--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote: > > The EPLRS System at Travis AFB (Northern California) > has moved (gone) from the Repeater Portion of the > 420-450 band. > > skipp > skipp025 at yahoo.com Skipp: Do you know exactly when this happened? We have similar interference here in SoCal, but one particularly annoying source that seemed to center around 449.0 to 449.5 suddenly disappeared about a month ago. The reason it was so annoying was that even though it was only in the repeater output portion of the band for us, the amount of time the signal was present in a NBFM RX was long enough to pulse the carrier squelch open (it sounded like a fast chirp every few seconds when listening with a SSB RX). 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: Mobile Duplexers
--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote: > > Hi Jim, > I really don't want to argue with you, but it can > be done and I've done it numerous times. It all > comes down to a number game (the specs) and a > reasonable approach. I'd like to see the specs on what you've come up with. A key advantage of the 2.5 MHz split that I use is that at that spacing the G.E. RX front end has significant rejection: over 40 dB at the TX freq., so it can work with as little at 40 dB of duplexer rejection at the TX freq. 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: Mobile Duplexers
--- In Repeater-Builder@yahoogroups.com, "russ" <[EMAIL PROTECTED]> wrote: > Some of the newer flat pack duplexers will do it. they will go down to 400 > kHz but you are limited to 50 watts and you only get 60 to 70 DB but if you > are using a couple of HT's it will work OK around a Hamfest. > 73 Russ, FWIW, I tried substituting a pair of Icom HTs in place of my VHF MVP for my 2.62 MHz split portapeater. Didn't work at all even at only 1 W TX power: too much TX noise & poor RX dynamic range. You need a real radio. Bob 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: Mobile Repeaters?
--- In Repeater-Builder@yahoogroups.com, "Dakota Summerhawk" <[EMAIL PROTECTED]> wrote: > Portables are great but I need the 35W (UHF) and the 50W (VHF) out to assure > that the coverage is adequate. > Thanks for the suggestion. > Dakota The G.E. MVPs will do 30 watts on 2 meters & 25 on 440. It'd be nice if they did a bit more but I've never had a problem with inadequate TX range on my systems. If you must have 50/35 watts you'll need to go with something bigger, or sacrifice performance. No one will notice 1 or 2 dB less TX power. I forgot to mention previously that I have a VHF MVP configured as a wide-split 2 meter repeater. The entire package fits in a backpack & is hand-carryable by a single person (including antenna). Nice when you have to install a repeater for a special event on a rooftop by yourself. 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: UHF Distance with 20 watts to Mobile, How Far
--- In Repeater-Builder@yahoogroups.com, "russ" <[EMAIL PROTECTED]> wrote: > Well your antenna has less then unity (DBD) in the real world so on the Of course, this is an incorrect statement. To answer Mathew's question: the coverage would depend greatly on your terrian & foliage density (lots of trees?). However, my guess is that a base station 20 miles away should be able to access your repeater provided there isn't a hill directly in the way. You might want to download "Radio Mobile" from http://www.cplus.org/rmw/english1.html & try plotting your expected coverage. 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: Help with circulator specs
--- In Repeater-Builder@yahoogroups.com, Joe Ciarcia <[EMAIL PROTECTED]> wrote: > Bob it may be the same one. It measures 9 X 9 1/4 inches and is fairly heavy. > The output to input port loss is 20 dB at the ends of it's coverage and 40 dB > at the tuned frequency. The 3 dB bandwidth is about 3 Mhz. > Do you have tuning instructions? > > Joe I don't remember it having any tuning adjustments, but I could be wrong-it's been a while since I've seen one. If all else fails I can ask my friend who still has one. Are you saying it's very lossy at 2 meters right now? Bob 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/
