Re: [Repeater-Builder] Re: Rolling Pipe Sound

Nasssty. Evil IM. Nice find. Nate WY0X On Dec 7, 2009, at 8:49 PM, larynl2 wrote: > > Do you have two FM stations in your area that are separated by 600 kc.? That > will definitely do exactly what you describe. We had it on our repeater. > > I caught in one of your posts that your transmitt

[Repeater-Builder] Re: 406-420 MHz Radios

Ted, Thanks for the offer. I am going to have to pass on the Mostar. I have been trying to keep as much of the equipment between sites the same as possible. We are pretty well familiar with the Micor and Mitrek series of radios and I think we want to stick with those if at all possible. I may b

Re: [Repeater-Builder] Sd174 uhf

A 50 ohm terminator should suffice, you may want to tune the terminated side to notch the TX frequency. On Mon, Dec 7, 2009 at 7:28 PM, Ian Wells wrote: > > > Yep its a mobile style 6 pack notch .would it be best with a 50 ohm > dummy load or 50 ohm terminator.I thought about tuning it with no

Re: [Repeater-Builder] Re: Rolling Pipe Sound

larynl2 wrote: > Do you have two FM stations in your area that are separated by 600 > kc.? That will definitely do exactly what you describe. We had it > on our repeater. Or AM. Or an AM station ON 600 kc also.

[Repeater-Builder] WTB Motorola VHF Quantar repeater

I am looking to buy a quantar in either vhf range...p-25 working condition. Willing to spend up to $1900.00. I heard there were some selling at $1800.00 but do not know where or who is selling. Thanks Bill in Atlanta 404 325-8992 jawjabillatl at bellsouth dott net . .

[Repeater-Builder] Re: Rolling Pipe Sound

Do you have two FM stations in your area that are separated by 600 kc.? That will definitely do exactly what you describe. We had it on our repeater. I caught in one of your posts that your transmitter needs to be on for the problem to appear, so that's intermod causing your interference, not

Re: [Repeater-Builder] Sd174 uhf

kerinvale wrote: > Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter > other transmitters near by .The receiver opens up with squark noise even > when programmed with ctcss .can anyone suggest whats possibly the problem is > and possible fixes.I have one on site and it se

RE: [Repeater-Builder] Programming a CAT1000

Good luck, Joe. I went through that drill a couple of years ago. I managed to get it all straightened out and documented, but it was quite a headache at the time. 73, Mike WM4B _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jo

Re: [Repeater-Builder] Sd174 uhf

Yep its a mobile style 6 pack notch .would it be best with a 50 ohm dummy load or 50 ohm terminator.I thought about tuning it with notch of 473.200 on the side we want to use (between the sd174 and antenna) and notch of 517.025 on the unused side (the side that goes to the dummy load) Thank You

Re: [Repeater-Builder] Sd174 uhf

dont know that number, but sounds like a mobile style 6 cavity notch duplexer, try the other side if the insertion loss is too high going one way, and the opposite side should have a 50 ohm load on it On Mon, Dec 7, 2009 at 6:01 PM, Ian Wells wrote: > > > Can one side of a 6mc450s diplexer be

Re: [Repeater-Builder] Programming a CAT1000

Thanks Mike, This is an older cat1000 and not the B model. I'm trying to short-cut this repair to get it off my bench but it looks like I'm going to have to dig into things. This is an older Spectrum Communications repeater with the CAT1000 controller. The original builder is long gone and

Re: [Repeater-Builder] Re: Rolling Pipe Sound

I don't think I've ever heard a "rolling pipe" sound over a repeater, although, once I had some interesting feedback from an SSB transmitter with FM receiver. Is there a good clean recording available? Kurt

RE: [Repeater-Builder] MAxtrac Help please

The answers are found in the Motorola Touch-Code Encoder Palm Microphone instruction manual 6881114E07, which is still available from Motorola Parts for about $3. It covers fifteen different DTMF mikes, including the HMN3013A used on the MaxTrac 800, and the HMN1037A used on the conventional MaxTr

[Repeater-Builder] Re: Rolling Pipe Sound

Eric Thanks, I have had great service from Telwave. They were very helpful for newbie. Thanks for all the tips and ideas everyone. It took me on a yet one more of many sniffing runs with my ht and about 10 feet of coax with about 2" of the center exposed so I could really sniff close. Well

Re: [Repeater-Builder] MAxtrac Help please

The maxtrac radios placed a DC voltage on the mic hi wire.  If you do not see that voltage, the mic will not work.  Now there is a possibility that the maxtrac may switch that voltage on and off along with the PTT (TX on and off) but I don't recall that being the case when I had the maxtracs. 

Re: [Repeater-Builder] Sd174 uhf

Can one side of a 6mc450s diplexer be used as I have a few of them laying around .The first test I tried worked well with a 6mc450s with no interference but the 174 lost a lot of its TX power through it .from 3 watt it reduced it down to .5 watt .I can say I didn't have a 50 ohm terminator on th

Re: [Repeater-Builder] Sd174 uhf

In that case use a single notch cavity to remove the 473 frequency in question. Circulators can be used in conjunction with shorted stubs and cavities to create super narrow notch filters, but this may be more than you need. http://books.google.com/books?id=trJ6rhF0lU0C&pg=PA122&dq=circulator+not

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

bil.i...@yahoo.com wrote: > > > Let me put in my two cents worth. Feed the power Thru the NO contact > of a relay. Connect the coil of the relay on the downside and the > relay will drop out and kill the power to the radio and the coil > before the battery is dead. A reset switch across the cont

RE: [Repeater-Builder] Re: Rolling Pipe Sound

Scott, One source is Telewave. Here are the datasheets for the 5" and 8" bandpass cavity filters: With the 30% Amateur discount, the 5" cavity will cost you about $231 plus shipping, and the 8" cavity is about $100 more. Other sources are Comprod, EMR, TX-RX, and Andrew. Some brands may requ

Re: [Repeater-Builder] Sd174 uhf

How would a circulator or isolator work .The transmitt signal from the data radio could pass through to the antenna and the rx signal could be received from the antenna and The signal you wish to remove from the data radio radio on receive could be notched to the dummy load . The data radio radio f

Re: [Repeater-Builder] Re: Rolling Pipe Sound

Certain linksys routers may be able to take different the firmware. http://www.dd-wrt.com/site/index Of particular note is the ability to change the clock speed. Also it has been my experience that the router isn't really the source of the interference. Try switching the SMPS wall wart to one of

Re: [Repeater-Builder] Sd174 uhf

depends on the quality of the filter. I would try using the coax stub routine with RG-58 as the coax, that should be fairly wide. But look at it on a spectrum analyzer to be sure it will pass both signals. If not try building a 3-5 pole interdigital BPF. Those can tune 10MHz wide easy. On Mon, De

Re: [Repeater-Builder] Re: Rolling Pipe Sound

Just catchingup on this... yes the infamous rolling pipe sound. We had an issue with a link receiver that occassionaly would get hung-up in a loop, low audio but the correct PL. We switched from PL to DCT on the links and that solved the problem. We spent a year hunting for the source but no

Re: [Repeater-Builder] Sd174 uhf

Our TX and rx frequencies are 10 meg apart so a band pass filter may have problems giving good signal on both or should I tune the filter in the middle of the two frequencies Thank You ,Ian Wells Kerinvale Comaudio, 361 Camboon road, Biloela.4715 Ph 0749922449 Mb 0409159932 Hm 0749922574 Fx 0

[Repeater-Builder] Re: Rolling Pipe Sound

The router is right at 147.580 to almost 147.595. The repeater input is 147.600. So I plan to take that offline. All that cables are double shielded with no adapters ect. I do not have anything between the isolator and the duplexer. Where is a good dealer for a 5" or 8" band pass for the receiv

Re: [Repeater-Builder] Sd174 uhf

The lack of a front end comes to mind. You basicly got there a hand held in a pretty box with a DB-9. Try adding a bandpass filter, such as a bandpass cavity, shorted coaxial stub or a interdigital bandpass filter. On Mon, Dec 7, 2009 at 3:42 PM, kerinvale wrote: > > > Hi guys .I have a SD 174

RE: [Repeater-Builder] Programming a CAT1000

Joe, Have you got a manual? If not, it's available on the CATAUTO website. You need to do a Dipswitch 7 reset to reset the password. Per the manual: "Switch 7 This switch is used to initialize the CAT-1000B. Set this switch to ON. Cycle the power OFF and back ON. During power-up, the memory wi

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Let me put in my two cents worth. Feed the power Thru the NO contact of a relay. Connect the coil of the relay on the downside and the relay will drop out and kill the power to the radio and the coil before the battery is dead. A reset switch across the contacts will start the system. Sent

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Mike, The -BB circuit is simply some diodes and a resistor to limit charging current. The basic circuit is found here: 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Lyon Sent: Monday, Decemb

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Jim, The Schottky diode approach works best with a switching supply that is inherently current-limiting. Some linear supplies cannot start under load, following a power outage. Although it may take a day or two to recharge an AGM battery when it only sees the float voltage. Ideally, the AGM bat

[Repeater-Builder] Programming a CAT1000

I found my DOS disk program, but can't find my notes on how to use the program. Anyone have this information? Also, it looks like someone changed the default password of "cat1000", does anyone know if it can be reset? I'm working on a repeater for a club and I'm trying to get it off my bench

RE: [Repeater-Builder] Rolling Pipe Sound

Scott, A likely suspect is a carrier being emitted by a nearby computer or microprocessor. A few years ago, I was setting up a GR1225 repeater on a VHF channel, and I noticed that the receive indicator LED was lit steadily. My spectrum analyzer revealed that there was a low-level but steady carri

[Repeater-Builder] Re: Astron RM-35M AGM charging abilities?

> A very simple method of achieving no-break battery > backup is to install a Schottky power diode on the > positive output terminal of the power supply, > and connect both the battery positive terminal and > the radio power leads to the cathode lug of the diode. What happens to the battery

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Is the circuit in the -BB version a charger or is it simply just a switch? Thanks, Mike On Mon, Dec 7, 2009 at 2:39 PM, Jim Cicirello wrote: > > > Hi Eric, > > I have been trying to follow these posts on battery back power. Under this > arrangement you describe, will the supply *not* get hot

[Repeater-Builder] Sd174 uhf

Hi guys .I have a SD 174 maxon data radio and it seems to not be able filter other transmitters near by .The receiver opens up with squark noise even when programmed with ctcss .can anyone suggest whats possibly the problem is and possible fixes.I have one on site and it seems to be working perfect

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Hi Eric, I have been trying to follow these posts on battery back power. Under this arrangement you describe, will the supply not get hot with the Schottky Diode in place if the battery is discharged very low? I am researching the best way to hook the battery to my Astron which does not have the

[Repeater-Builder] Re: Rolling Pipe Sound

No worries, the more info the better. Echoproducer is the Bees Knees if you are running echolink. It is one very impressive and free program. Peter has put a lot of work into it. Scott --- In Repeater-Builder@yahoogroups.com, Tony KT9AC wrote: > > Scott, > I also would second the "reverse rep

Re: [Repeater-Builder] Re: Rolling Pipe Sound

Scott, I also would second the "reverse repeater" theory. Years ago (many) we had a repeater in Western PA on 147.165 that would lock up with a Michigan repeater on 147.765 (both rightfully coordinated) and produce the "pipe" sound. In those days (1980s) everyone ran carrier squelch and we had

[Repeater-Builder] Re: Rolling Pipe Sound

Thanks for the quick reply The revers pair is a good point. I am in a remote area and did the full coordination but still we have had some odd ducting here as I am close to 9K mountains and I am at around 4K feet to start with. Tony I have not ran it without the tx pl. I have a few folks that

[Repeater-Builder] pearl schwartz day

Wishing you all a pleasant Pearl Schwartz day... Ted Bleiman K9MDMMDM Radio "If its in stock...we;ve got it!" P O Box 31353 Chicago ,IL 60631-0353 773 631 5130

Re: [Repeater-Builder] Rolling Pipe Sound

Scott, You are not alone in this!! I too have been fighting a problem almost exactly like this - I've tried different PL tones on RX and TX and that seemed to keep it from "self-oscillating". Seems to happen more when the weather is dry and I describe it as a "growl" sound. Happening on a MSF50

Re: [Repeater-Builder] Rolling Pipe Sound

You may be locking up with a repeater on the reverse pair during a band opening. Chuck WB2EDV - Original Message - From: "offtracks1" To: Sent: Monday, December 07, 2009 3:48 PM Subject: [Repeater-Builder] Rolling Pipe Sound > Thanks for all the post and for the web site and group

[Repeater-Builder] Rolling Pipe Sound

Thanks for all the post and for the web site and group. It's been very helpful to me as I have been setting up my system. My repeater system is a Kenwood TKR-750 K2, Telwave TPRD-1556 duplexer set (6 cavities), A Telwave Isolator on the PA. Running 1/2" Heilax to a Andrew DB224E antenna. This a

Re: [Repeater-Builder] Tait T800 series 1 low band for 6m?

Hi Martin, perhaps the repeater keeper of GB3VI can be of assistance to you: http://www.repeaters.pwp.blueyonder.co.uk/index_files/Page406.htm 73 de Darren G7LWT 2009/12/2 cruizzer77 > > > I'm collecting info about using a Tai

Re: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Sorry. Yes, it's a -BB version. -Mike On Mon, Dec 7, 2009 at 9:31 AM, Eric Lemmon wrote: > > > Mike, > > I thought that only the RM-35M-BB has a battery backup circuit built-in; I > have an RM-35M power supply in service, and it does not have a battery > charging circuit. > > A very simple met

RE: [Repeater-Builder] Astron RM-35M AGM charging abilities?

Mike, I thought that only the RM-35M-BB has a battery backup circuit built-in; I have an RM-35M power supply in service, and it does not have a battery charging circuit. A very simple method of achieving no-break battery backup is to install a Schottky power diode on the positive output terminal

RE: [Repeater-Builder] MAxtrac Help please

I believe some of the newer mic's don't have the tone encoder in the mic and have it in the radio, I have what I thought was a newer TT mic on my GTX, but no tones. I believe the MSC2000 is one like that. From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf

Re: [Repeater-Builder] 406-420 MHz Radios

OH! well maybe he'll see this. happy holidays to all anyhow. mdm Ted Bleiman K9MDM MDM  Radio    " If its in stock...we've got it!" P O Box 31353 Chicago, IL 60631-0353 773.631.5130  fax 773.775.8096  web http://www.mdmradio.com'>http://www.mdmradio.com";>http://www.mdmradio.com  e

Re: [Repeater-Builder] MAxtrac Help please

w7nikw7nik wrote: > Has anyone rewired the pin out on a Motorola DTMF mic model hmn3013a > to a maxtrac 300 . I do not see voltage out the mic jack , this might > be a problem . Any help would be great I can get different dtmf mic , > but i don't know what model to get . As far as I can tell, it

Re: [Repeater-Builder] 406-420 MHz Radios

WA7JAW was asking. Chuck WB2EDV - Original Message - From: "Joe" To: Sent: Monday, December 07, 2009 9:44 AM Subject: Re: [Repeater-Builder] 406-420 MHz Radios > Hi Ted, > > I wasn't looking for a 406-430 radio, were you thinking of someone else? > > Joe > > > Ted Bleiman K9MD

Re: [Repeater-Builder] 406-420 MHz Radios

Hi Ted, I wasn't looking for a 406-430 radio, were you thinking of someone else? Joe Ted Bleiman K9MDM - MDM Radio wrote: > > > joe > i have a mostar 406-430 if that'll do you any good works with mike > (I'm pretty sure) $50 + post (it'll ship priority) > mdm ted > > > >

Re: [Repeater-Builder] 406-420 MHz Radios

joe i have a mostar 406-430 if that'll do you any good works with mike (I'm pretty sure) $50 + post (it'll ship priority) mdm ted