Re: [Repeater-Builder] Re: Flat Audio
Then there's DTMF.. DTMF decoders HATE the high tone being louder than the low tone. With pre-emphasized audio and a "flat" receiver, that's what you'll get. In the telco world, this is called "reverse twist". Typical DTMF chips work over a 30dB range in amplitude. If your DTMF decode shows any sensitivity to the level adjustment, you have "reverse twist". To fix that, de-emphasize before feeding the audio to the DTMF chip.
Re: [Repeater-Builder] White Noise on Two Meters.....
Can you get your hands on a better receiver, like an Icom R-8500? I've noticed that there are lots of things that a narrowband receiver can't "see", that an all-mode and/or wideband FM receiver can. 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] Duplexer Wanted
Look at < http://www.repeater-builder.com/tech-info/effectivesens.html > - a writeup from Chris Boone WB5ITT, who happens to be a pretty sharp guy. Very good article. I got a 50dB sample pad from Telewave, and have it installed in the system. Makes it very handy to look at the transmitted spectrum, or do receiver adjustments. I was trying to make an example of the fact that when you are chasing desense, grunge or crud you will never hear the interfering signal if you are hiding behind a PL decoder. Yes. PL helps HIDE the problem, but does not eliminate it. We use PL here because we have two other machines on the same frequency, and their users sometimes end up bringing up our machine. 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: Aviation Problem Returns, Need Some Help, or a Tuned Stub
Well... Antennas don't create signals. Your antenna may well be interacting with your amp in an odd way. but it's not the antenna that's making the spurs. Can you add more feedline, so that the total length you added to the system is an even multiple of a wavelength? 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: Aviation Problem Returns, Need Some Help, or a Tuned Stub
On 4/10/06, Bob Dengler <[EMAIL PROTECTED]> wrote: At 4/10/2006 02:13 PM, you wrote:>Tuning the transmitter fixes, filters mask.>Unfortunately without a spectrum analyzer, you'll never know it's in >comb mode. I've done this on three systems, two VHF and one 220,>and they all act about the same. Tune the TX for max output, and>you'll end up on or very near comb mode.Really? Guess I'm spoiled with the Midland 13-509 & G.E. radios: both arefairly difficult to make spurious even if you try. Yeah, it's not pretty. This is by far the most "picky" transmitter I've worked on. Most everything else is either right or pretty close to right if you simply tune for max output. On the daniels gear, that IS the tuning procedure, other than watching for peaks in current consumption, but again you can simply tune for max output and you will be clean, just maybe not as efficient as you could be. 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] Aviation Problem Returns, Need Some Help, or a Tuned Stub
I think I'm the guy about the filter, and the offer stands, but I agree, you need to see where in the chain it's being generated. BTW: Since I was up there last, I took our old maggiore TX off the air, and it was similar to yours, slightest adjustment makes it a comb generator. Also, the club 220 machine is sititng on my bench, and it behaves the same way. Good job on migrating away from those things. 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] down tilt
If a coaxial collinear is fed with a signal that is 2% lower than its design, the antenna will exhibit a vertical beam downtilt of approximately 3 degrees and suffer approximately 10% loss in overall gain. If a signal that is 2% higher than the antenna design is fed into a coaxial collinear, vertical beam uptilt of approximately 3 degrees will occur, and again a loss of overall gain. I was wondering about the effects of tilt with fiberglass antennas. I've looked at what a couple degrees of tilt will do to the coverage area of a low site (<150') and it's not good. Then I look up at my fiberglas vunderstik which is tilted about 3-4 degrees to the east depending on how the wind blows. I really want to put my dipole array up! 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] maggiore hi-pro rv4 220 squelch problem
Yea,http://www.link-comm.com/controllers/accessories/rlcmot/rlc-mot.htm Looks nice, but I'd rather not put that sort of money in this hardware. I'm just looking to make it "work" like it did when it was "working". I've already retuned the transmitter to get rid of the "comb-generator" feature. 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] db 4072
On 3/27/06, Tony Faiola <[EMAIL PROTECTED]> wrote: Dave VanHorn wrote:> Anyone know how much power this Br-Br duplexer is designed for? Yes, Dave, power max input is 150 Watts. I am putting one up for salefor $125.00.I have been told it is a good price for a good 4072. If you have a faxnumber, I can fax you the spec sheet. I have a spec sheet now, thanks. I just picked one up, but paycheck permitting it looks like a good bit of kit to have around. I've got mine retuned for my UHF pair now, it's pretty far in there on the tuners, but it made it ok. 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] 10 Meter Repeater
Wireline from about 1000 feet to a couple of miles ? I don't think so. Sepreation of this distance for 10 meters usually means a radio link. You certainly can go wireline for 10's of miles. I used to work for Muzak, we did this routinely. People underestimate the noise rejection properties of 600 ohm balanced pairs. 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] 10 Meter Repeater
Is there a such thing as a duplexer for 10 meters?? Ever seen a Quonset hut? :) 6M duplexers are huge.. You might be as well off using coax stub duplexers. Someone was just talking about those in the last week or two. OTOH, if you can put your receiver and transmitter any appreciable distance apart, and use two antennas and feedline, then you just need to wireline the audio signals between them. 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] coax question
Well, I'll toss FSJ1-50 into the mix. No worries about percentage of shield, or bimetallic problems. It's 1/4" miniature hardline. It connects nicely into PL-259 connectors with the larger adaptor, and into N and BNC connectors. 100% shielding. 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: Any ideas? (a little off topic)
You might look at APRN. Automatic Picture Relay Network. An offshoot of APRS. The unit in the field transmits an image file accompanied by a APRS packet. The APRN server software captures the picture and attaches the location data from the APRS packet. This is stored on the server's hard drive and exported to a web page for viewing. Did they ever come up with a mechanism to tie the picture to the appropriate APRS packet? 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] Any ideas? (a little off topic)
Sounds interesting from a skywarn sort of angle.. Tell us more? 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: MOTOROLA MICOR receiver VHF
we have a backup REAPEATER spectrum and it is put out 75 W VHF no problems same power supply? and no SQUEALING REAPEATER anymore ID,s thanks for previous replies ANTHONY W4NCR I'd still check the supply. One bunch of hardware may be more tolerant of that type of problem than another.. 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: MOTOROLA MICOR receiver VHF
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of ANTHONY
Sent: Thursday, July 28, 2005 1:58 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: MOTOROLA MICOR receiver VHF
I AM BACK AGAIN, WITH THE SQUEALING REAPEATER PROBLEM.JUST BY CHANCE
, I HAPPEN TO NOTICE THE AMP METER ON THE POWER SUPPLY WAS DECREASING
IN AMPS FROM WHAT IT WAS PULLING, IT WAS DROPPING BACK TO 5--AMPS OR
LESS, AND WHAT IS HAPPENING IT IS DROPPING BACK IN OUTPUT POWER WHEN
IT IS SQUEALING,WE HAVE IT SET FOR 50--WATTS, AND NOW IT HAD DROPPED
BACK TO 40-WATTS, BUT NO SWR ON THE ANTENNA.AND PUT A DUMMY LOAD ON
THE TRANSMIT SIDE OF MICOR, AND IT IS STILL DOING IT.ANY IDEAS ON
THIS PROBLEM AND HOW TO SOLVE IT?
Have you tried a large capacitor, on the DC input?
Maybe 10,000uF or better, low impedance type. ("low esr")
If I was there, I'd hang a scope on your DC supply line, but I can't do that
remotely :)
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