[Repeater-Builder] Re: GE MASTR Professional Equipment
To ALL; If you have never tuned one of these receivers up, you should get one and DO IT! Tweaking the helical front end is amazing! It's so intuitive and something that will be LOST forever in the digital age. They won't be around forever. I even have a VHF MastrPro mobile NEW IN THE BOX!! I scrapped lots of the tube transmitters and mobile power supplies,,, but I did KEEP the receivers!... WE6R,-- Live Long and Prosper. --- In Repeater-Builder@yahoogroups.com, "Fred Seamans" wrote: > > To All: I am going to get completely away from MASTR Pro equipment. If > anybody wants anything, contact me off net and I'll see if I have it. Cost > very cheep plus shipping. Anything not gone in three weeks is going to the > trash. > > seaman...@... > > Fred W5VAY >
[Repeater-Builder] Re: Motorola Maxtrac for cw beacon
I understand it that modulated FM is not acceptable in the Non-voice sub-band. And there are power limitations for beacons. See 97.203 and others; http://www.repeater-builder.com/fcc/2008-part-97-rules.pdf WE6R --- In Repeater-Builder@yahoogroups.com, "Gordon" wrote: > > Is it possible to mod a maxtrac for cw operation for a ham 6 meter repeater. > If not maxtrac what about other Motorola or GE Radios. > > Gordon N4LR >
[Repeater-Builder] Re: New 6M Repeater in Central NH
WoW! Nicely done project! Nice pics too! I will program it into the Maratrac for the next band opening. How do you expect the wide temperature extremes to affect the duplexer tuning?? Here is a corrected link, the comma got attached. http://www.gemoto.com/cnharc/gunstock.htm ..Keith WE6R in Monterey Ca 51.76 out, 51.26 in PL 114.8 --- In Repeater-Builder@yahoogroups.com, "Jason Greene" <[EMAIL PROTECTED]> wrote: > This repeater is on Gunstock mountain, and it is a large area machine > covering from northern N.H. to Rhode Island, Vermont to well into Maine. > It is on 53.77 71.9 in, 100 out and uses the call K1RJZ. > More information can be found at > http://www.gemoto.com/cnharc/gunstock.htm and if you think you might > be able to hit it, please give it a squeeze. > Jason
[Repeater-Builder] 10 meter Repeater bandplan, National Coordination, 100KHz splits etc
Since I instigated it, I thought I would start a new thread. There seems to be a lot of interest in this, but lets keep it calm and POSITIVE, and if a moderator wants to shut it down, fine. 1. I just remember how much fun it was when the band was open working numerous FM repeaters at the same time to make many contacts!! This was ruined by the repeaters that were running CARRIER squelch and had LONG hang times or remote bases with POOR (or no) receivers!!! 2. I would like to see more repeater pairs and wider splits, BUT I THINK WE NEED TO CLEAN UP THE CURRENT REPEATERS FIRST to prove it can work! 3. I think there needs to be National coordination and enforcement. As an OO, I would like to give some positive encouragement to those that need to clean up their repeaters! So there seem to be 2 "national coordinators"; http://www.arrl.org/nfcc/ http://www.thenfcc.org/ Do they care about 10m repeaters? Should I email ALL of them? Would OO cards stating "good engineering practice" help? ... or give up and enjoy the Magic Band!! ... Keith WE6R 51.76 (51.26 in) PL 114.8 encode AND decode!!
[Repeater-Builder] Re: NFCC cordination foo
OK, what is the difference in them and; http://www.arrl.org/nfcc/ ? ...Keith WE6R --- In Repeater-Builder@yahoogroups.com, Jay Urish <[EMAIL PROTECTED]> wrote: > > Probably more off topic, but refreshing none the less.. > > Looks like the NFCC has adopted a code of ethics.. I think this has been > a long time coming. > > http://www.theNFCC.org > > > -- > Jay Urish W5GM > ARRL Life Member Denton County ARRL VEC > N5ERS VP/Trustee > > Monitoring 444.850 PL-88.5 >
[Repeater-Builder] Re: ten meter desense help
I believe the Maxtrac noise blanker is a pulse type vs one that is tuned to a nearby freq, but we can certainly disable it and give it a try (push and hold monitor button until 3 beeps). ...Keith --- In Repeater-Builder@yahoogroups.com, "Al Wolfe" <[EMAIL PROTECTED]> wrote: > > Keith, > Some of the local guys here had a similar problem and setup as you on > ten meters. It turned out that the transmitter, even though several miles > away, was saturating the extender (noise blanker). Turning off the extender > on the receiver solved the desense problem. > > These were not Motorola savvy guys and didn't really know what an > extender was or did or how they worked. > > It may be possible to retune the extender receiver to a different > frequency far enough away from the transmit frequency and still be effective > but not desense. YMMV. > > Merry Christmas, > Al, K9SI > > > >> "kb1we6r" wrote: > >> I need ideas to cure desense on a 10 meter repeater. > >> Details; > >> 1. 100KHz split, (29.66 out 29.56 in) > >> 2. Maxtracs on both ends, UHF link > >> 3. Several miles of separation > >> 4. Sometimes it works OK with no desense, but usually when the tx > >> comes up, a buzzing type of noise wipes out most signals, even ones > >> that were full quieting before. > >> 5. The buzzing sounds like powerline noise. > >> 6. There is some kind of wireless node nearby. > >> > >> What other types of noise generators could be exagerated by the > >> additon of the 10m transmitter? > >> > >> Is it possible to make a notch filter out of big hardline at 100KHz > >> with acceptable insertion loss? > >> > >> Would a window filter (DCI type) help with that type of noise? > >> ...Keith WE6R >
[Repeater-Builder] Re: 10 meter desense help, split site, high noise floor.
Thanks, yes, the split is too close to do much! I recently had both sites equipment here to check it out, everything looks good and plays (individualy) here with no problems. With the transmitter turned off, weak signals can get in and sound great on the UHF link. I just learned that there is a CAR TYPE BATTERY CHARGER across a battery at the receive site. aAARRRGGHH!! I don't know why the noise appears only when the transmitter (miles away) comes up though, but the first order of business is to pull the plug on that thing and see what happens. (maybe it is playing havok with the Maxtac's noise blanker?) Why oh why did they pick 100KHz??? The 10m band is HUGE with no activity (even when the band is open, there should be plenty of room for a better repeater plan). Keith, WE6R in Monterey CA --- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote: > > Hi Keith, > > Do you have the equipment to check each location > for desense and effective sensitivity? > > It would be very hard to make a notch cavity from Hard-line > with enough Q to allow a decent 100KHz split. Even placing a > band-pass cavities will help only so much... > > A DCI Filter would not be the right type of filter with > enough of the protection you're hoping to receive. > > One last thing... what type of 10 meter antenna are you using > and what type of match does it provide? > > The key is probably first listening to the receiver and UHF Link > operation without the remote transmitter side on the air. > > First find out where the gremlins really visit your party so > you don't chase your tail and waste time... > > cheers, > s. > > > "kb1we6r" wrote: > > I need ideas to cure desense on a 10 meter repeater. > > Details; > > 1. 100KHz split, (29.66 out 29.56 in) > > 2. Maxtracs on both ends, UHF link > > 3. Several miles of separation > > 4. Sometimes it works OK with no desense, but usually when the tx > > comes up, a buzzing type of noise wipes out most signals, even ones > > that were full quieting before. > > 5. The buzzing sounds like powerline noise. > > 6. There is some kind of wireless node nearby. > > > > What other types of noise generators could be exagerated by the > > additon of the 10m transmitter? > > > > Is it possible to make a notch filter out of big hardline at 100KHz > > with acceptable insertion loss? > > > > Would a window filter (DCI type) help with that type of noise? > > ...Keith WE6R > > >
[Repeater-Builder] 10 meter desense help, split site, high noise floor.
I need ideas to cure desense on a 10 meter repeater. Details; 1. 100KHz split, (29.66 out 29.56 in) 2. Maxtracs on both ends, UHF link 3. Several miles of separation 4. Sometimes it works OK with no desense, but usually when the tx comes up, a buzzing type of noise wipes out most signals, even ones that were full quieting before. 5. The buzzing sounds like powerline noise. 6. There is some kind of wireless node nearby. What other types of noise generators could be exagerated by the additon of the 10m transmitter? Is it possible to make a notch filter out of big hardline at 100KHz with acceptable insertion loss? Would a window filter (DCI type) help with that type of noise? ...Keith WE6R
[Repeater-Builder] Re: Receiver overload
I think your title says it, overload. Parelectronics makes a little 3 pole filter, is that the one you tried? You can tweak all 3 poles to 104.9 for about 50 db attnuation. http://www.parelectronics.com/vhf-fm.htm A shorted stub would be easy to try too, there are several designs. Since the FM freq is so far away, try putting a T in line and a half wave (at 104.9) length of coax (times the velocity factor) on the T. Start long and work your way along the coax from the end with a pin and stick it in and short the coax while watching the FM signal on the spec anyl. Find the best null, then cut and solder and check the insertion loss at your 900 freq. ... Keith WE6R --- In Repeater-Builder@yahoogroups.com, "David Epley" <[EMAIL PROTECTED]> wrote: > > I have a repeater receiver overload problem I am trying to cure. The > repeater is a 900mhz 927.7125/902.7125. There is an FM broadcast station 100 > yards away 104.9mhz. The repeater works fine at another site. My transmitter > is a Motorola Purc 5000 running 75 watts the receiver is a converted maxtrac > 800mhz radio. Duplexers are Telwave BpBr 4 cavity. I have 10 to 12 db > degradation when plugged into 3 different antennas on the tower. When I use > a 900mhz dish antenna pointed away from broadcast tower I only have 3 db > degradation. I have tried 3 different maxtrac receivers, added 2 more BpBr > cavities in the receiver side and used 3 pole filters in the receivers with > no improvement. Today I looked at the signal level getting to the receiver > at 104.9. To my surprise I was getting -8 dbm at the receiver. I believe > this level is overloading the front end of my repeater. I was wondering if a > stub cut for the broadcast frequency would work. Any thoughts would be > greatly appreciated. > > > > > > David Epley, N9CZV > > Winchester, Indiana >
[Repeater-Builder] Re: Motorhead (Motorola) 16 pin conn Maxtrac, GM300, M120 programming information?
Here is what the Maxtrac High Signaling will do for the various schemes; (the programmable pins). http://members.trainorders.com/kbdunsmuir/maxtrac16pin.jpg and xls form; http://members.trainorders.com/kbdunsmuir/maxtrac16pin.xls ...Keith WE6R --- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]> wrote: > > Motorhead (Motorola) 16 pin conn Maxtrac, GM300, M120, > Radius programming information? > > Is there a place on the web that describes how the 16 pin jack on > the above listed Motorola Mobile Radios can be assigned and for > what I/O Functions. > s. >
[Repeater-Builder] Re: Data Signal,Inc. CWID-70 Manual needed.
I was able to obtain a manual. Data Signal became Game Country, Inc. and they still have some old manuals left. Their address is; Game Country, Inc. 2403 Commerce Lane Albany, GA 31707 Here is the email I received from them; We did go by the name Data Signal quite a few years ago. We got out of that business when cell phones took off and eliminated about 80 % of our product line. Fortunately, we do still have some of the old product manuals available. We have a CWID 70 DC version that you can purchase for $10.00. It has all the information that you need. Schematics, theory, installation and so on. One thing you do need to know is that coding of the prom is no longer possible by us. If you need to change the code, then you will have to go elsewhere. To get the manual send a check along with your complete mailing address. Please let me know if you need further assistance. Have a nice day. Technical Support Game Country www.gamecountry.biz --- In Repeater-Builder@yahoogroups.com, "kb1we6r" <[EMAIL PROTECTED]> wrote: > > I have one also. > I need a manual and programming info. > It has a M3-7603-5 chip in it. I think it it contains the callsign and > timing info. > ...Keith WE6R > > --- In Repeater-Builder@yahoogroups.com, "Don" wrote: > > > > I have a Fellow Ham looking for Info on this Unit, The sad thing is I > > had one and the Manual, and actually ordered a New ROM With My call > on > > it, But I cannot find the info it is tough getting old Any info would > > be greatly appreciated > > > > Thanks Don KA9QJG > > >
[Repeater-Builder] Re: Data Signal,Inc. CWID-70 Manual needed.
I have one also. I need a manual and programming info. It has a M3-7603-5 chip in it. I think it it contains the callsign and timing info. ...Keith WE6R --- In Repeater-Builder@yahoogroups.com, "Don" <[EMAIL PROTECTED]> wrote: > > I have a Fellow Ham looking for Info on this Unit, The sad thing is I > had one and the Manual, and actually ordered a New ROM With My call on > it, But I cannot find the info it is tough getting old Any info would > be greatly appreciated > > Thanks Don KA9QJG >
