[Repeater-Builder] UHF Repeater
Hi all, I have a UHF MSR2000 repeater and various RX TX modules. The exciter module is a VTE4001A for 403-430 MHz. The RX module is a VRE4001B for the 450-512 MHz. Has anybody had any success tuning these to the 430-450 MHz Ham band? The curious part is that the existing RX (VRE4001B) was used on 416.9375. Are they that wide band at the front-end preselectors? Any and all information will be appreciated. Tony VE3DWI.
RE: [Repeater-Builder] Times Microwave RT142 Cable - UPDATED
Wayne, That's interesting. I have some Times Microwave Systems cable that looks exactly like RG223. The numbers on the cable state 68999 AA-8338. I contacted TMS and got the following information. The 68999 is a Code Identification number the AA-8338 is the drawing number. The following provided specs are stated as. RG142 type with Polyethylene Jacket. Center Conductor: Solid Silver Plated Copper 0.037. Dielectric: Solid Polytetrafluoroethylene 0.116 (try saying that fast 10 times). First Shield: 36 Ga. Silver Plated Copper 0.139. Second shield: 36 Ga. Silver Plated Copper 0.162 Jacket: Black Polyethylene. Recommended minimum bend radius: 2.5 Weight per 1000 ft (Nominal) 40 lbs. Operating Temperature: -40 to +80 C. Impedance (Nominal): 50 Ohm. Velocity of Propagation (Nominal): 69.4 %. Capacity (Nominal): 29.3 pf/ft. Attenuation @ 400 MHz (Typical): 8.7 dB/100ft. Power rating @ 400 MHz (Typical): 375 Watts. Return Loss (50 MHZ - 2 GHz): 20 dB. 73, Tony VE3DWI * From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon Sent: May 12, 2008 23:20 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Times Microwave RT142 Cable - UPDATED Wayne, My contact at Times Microwave Systems advised me that RT-142 is a triaxial cable in their REMIT specialty product line. The name refers to Reduced Electro Magnetic Interference. Although Times does claim that RT-142 is manufactured in accordance with the material requirements of MIL-C-17 it is not a QPL-listed product. Times will not mark the jacket unless specially requested by the customer. Here are the specs from the REMIT catalog page: Inner Conductor - 0.039 SCCS Dielectric OD - 0.116 Dielectric Material - Not specified Shield Braids - SC Shield Coverage - Not specified Jacket Material - FEP Jacket OD - 0.215 Nominal Impedance - 50 ohms Nominal Capacitance - 29.4 pF/ft Max Operating Voltage - 1,900 VRMS Max Attenuation at 400 MHz - 9.0 dB/100 ft Velocity of Propagation - Not specified If this cable is used in place of double-shielded coaxial cable such as RG-400, the insulating barrier should be trimmed back from the connector clamping or crimping area, so that there is positive metal-to-metal contact between the shields at both ends of the jumper. Care must be taken to select connectors that fit the dielectric without slop; otherwise, a significant impedance bump will occur at the cable/connector interface. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of Wayne Sent: Sunday, May 11, 2008 8:34 PM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: Re: [Repeater-Builder] Best coax for short jumpers in repeater cabinet? I have some cable that I cannot find the true information for. it is labeled as follows: 68999, TIMES MICROWAVE SYSTEMS, RT142 It is not listed, at least not readily seen, on the Times microwave web site. It appears to be a version of RG142. It is tan outer cover Double shielded, high density silvered (or tinned) with insulation between teh two shields.. clear solid inner insulation, and stiff solid center conductor. I bought it to use as RG142 for jumpers. It looks virtually the same as some labeled RG142 that came with a Micor UHF duplexer, though less flexible than the RG142 seems to be. I now wonder if it is interchangeabe or not? I have never seen any cable labeled RT instead of RG... Wayne WA2YNE
RE: [Repeater-Builder] MSR2000
Hi Ron, Thanks for the info. That's exactly what I'm afraid might happen. But, as you say, the MSR2000 has better shielding and it's worth a try. Since it is unlikely that both receivers will be receiving their signals at the same time, I can always give each receiver, and it's mating far-end link TX, a different PL tone and get around it that way. If the IF's are talking to each other at least only one will open up. Tony VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Ron Wright Sent: May 1, 2008 00:55 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] MSR2000 Tony, In the Mot Consoles using the Mitrek if they had same IF and were stacked they would talk to each other. I would think if single unit would not be a problem. It has to do when you have more than one in one place. I would think the MSR2000 is better shielded, but the IFs might not be shielded as good as needed if 2 rcvrs installed in one MSR2000. 73, ron, n9ee/r
[Repeater-Builder] MSR2000
Hi all, Does anyone know what the consequences are of using a second receiver with an IF of 10.7 instead of 10.8 MHz in the 2nd RX spot of an MSR2000. Tnx for any help VE3DWI
RE: [Repeater-Builder] Re: MSR2000
Thanks skipp. Yes it has all the filtering for a repeater. I don't have an R2 audio/squelch module but I'll use a second R1 module which I will modify with the addition of a small PL decode board and make sure it will reflect the same pin-out as the R2 board lay-out etc. Tony VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: April 30, 2008 19:48 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: MSR2000 Shouldn't change the performance regardless of which Receiver-IF you use if the duplex filter boards, covers and proper shield kits are installed. Sometimes some of the receiver stuff leaks RF but it shouldn't be that much, nor that far to change anything in the other receiver as long as the mentioned above options are in place. Motorola sold option kits to operate both receiver boards at the same time. cheers, skipp Tony Lelieveld [EMAIL PROTECTED] wrote: Hi all, Does anyone know what the consequences are of using a second receiver with an IF of 10.7 instead of 10.8 MHz in the 2nd RX spot of an MSR2000. Tnx for any help VE3DWI
RE: [Repeater-Builder] Fw: Thank You, Lord
Ralph, My apologies to you, it was NOT a personal attack. I was not offended by the content but it was the third such message coming through the list server. As I said in my first reply, it was “low speed dial-up 28.8 Kb” frustration showing through. Enough said, no more replies please. 73, Tony VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Ralph Messer Sent: April 24, 2008 10:39 To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; Jay Rivenbark; justblonde0419; [EMAIL PROTECTED]; Pat Hartley; Repeater-Builder; [EMAIL PROTECTED]; smesser33 Subject: [Repeater-Builder] Fw: Thank You, Lord
RE: [Repeater-Builder] Fw: Thank You, Lord
Moderators, Why are we getting jokes on this list server? Isn’t there enough wasted bandwidth on the internet already? I am telling all my friends NOT to send me all kinds of that crap. Some attachments are 10Mb. Some people can’t get high speed internet because they live in the country and still use dial-up. How frustrated they must be. Does my frustrations show? You bet it is. 73 and thank you to all who do honour requests like this. Tony, VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Ralph Messer Sent: April 24, 2008 10:39 To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; Jay Rivenbark; justblonde0419; [EMAIL PROTECTED]; Pat Hartley; Repeater-Builder; [EMAIL PROTECTED]; smesser33 Subject: [Repeater-Builder] Fw: Thank You, Lord - Original Message - From: Pat mailto:[EMAIL PROTECTED] Hartley To: Wanda Bowen mailto:[EMAIL PROTECTED] ; Wanda mailto:[EMAIL PROTECTED] ; Tracy mailto:[EMAIL PROTECTED] ; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com ; Steve mailto:[EMAIL PROTECTED] Greene ; Sharon mailto:[EMAIL PROTECTED] ; Rosa mailto:[EMAIL PROTECTED] Jay ; Ralph Messer mailto:[EMAIL PROTECTED] ; pope mailto:[EMAIL PROTECTED] armstrong ; Millie mailto:[EMAIL PROTECTED] ; Linda mailto:[EMAIL PROTECTED] ; Les mailto:[EMAIL PROTECTED] ; Kim mailto:[EMAIL PROTECTED] ; Judy mailto:[EMAIL PROTECTED] ; JJ mailto:[EMAIL PROTECTED] ; Jimmy mailto:[EMAIL PROTECTED] ; Jerry mailto:[EMAIL PROTECTED] Jen ; Jerry mailto:[EMAIL PROTECTED] ; Jack mailto:[EMAIL PROTECTED] ; Hazel mailto:[EMAIL PROTECTED] ; Gene mailto:[EMAIL PROTECTED] ; Diana mailto:[EMAIL PROTECTED] ; Danny mailto:[EMAIL PROTECTED] ; Crystal mailto:[EMAIL PROTECTED] ; Clay mailto:[EMAIL PROTECTED] ; Clarence mailto:[EMAIL PROTECTED] ; Clara mailto:[EMAIL PROTECTED] ; Cheryl mailto:[EMAIL PROTECTED] ; Butch mailto:[EMAIL PROTECTED] ; Bruce mailto:[EMAIL PROTECTED] ; Bill mailto:[EMAIL PROTECTED] ; Betty mailto:[EMAIL PROTECTED] Jess Sent: Thursday, April 24, 2008 10:14 AM Subject: Fw: Thank You, Lord - Original Message - From: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net To: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; crystalis4unc@ mailto:[EMAIL PROTECTED] yahoo.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] knc.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; angie.mccord@ mailto:[EMAIL PROTECTED] yahoo.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; hartley9444@ mailto:[EMAIL PROTECTED] aol.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ent.com; juliebedard@ mailto:[EMAIL PROTECTED] bellsouth.net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; budlinpenley@ mailto:[EMAIL PROTECTED] bellsouth.net; rosieandjay@ mailto:[EMAIL PROTECTED] hotmail.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; crystalis4unc@ mailto:[EMAIL PROTECTED] yahoo.com; danielleb013@ mailto:[EMAIL PROTECTED] yahoo.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; shoppnqueen@ mailto:[EMAIL PROTECTED] ptmc.net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] net; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; judyblue2001@ mailto:[EMAIL PROTECTED] yahoo.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] .rr.com; donnamingusturner@ mailto:[EMAIL PROTECTED] yahoo.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; Jean.Lovelace@ mailto:[EMAIL PROTECTED] interstategroup.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] haft.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] RR.COM; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] .com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; rogersimpson12877@ mailto:[EMAIL PROTECTED] carolina.rr.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; tilliernbsnccc@ mailto:[EMAIL PROTECTED] hotmail.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ens.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] rr.com; linniehelms@ mailto:[EMAIL PROTECTED] yahoo.com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] com; shirley.burris@ mailto:[EMAIL PROTECTED] wachovia.com;
RE: [Repeater-Builder] Zetron ZMX dtmf mic
I have the programming instructions for a Zetron ZML mike. If you think it is the same, I'll be happy to email it to you. 73, Tony VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of barrypal Sent: April 20, 2008 10:55 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Zetron ZMX dtmf mic Does anyone have programming information for the Zetron ZMX dtmf mic? It is programmable using the dtmf pad on the mic. I am using it on a Motorola m1225 and it's working great but it has been programmed to send a dtmf on key down and key upCan't have that.. Thanks
RE: [Repeater-Builder] Re: Bad adapter
While investigating a problem with a Low-Band (46 MHz) repeater, we determined that the antenna harness on a DB 212-4 was bad. It turned out that two UHF female T connectors were bad. The center pin of the T was, instead of screwing into the center of the through pin, making contact with the aid of a little metal spring. It had rusted so badly that the spring broke in several pieces when we took it apart. Can you imagine this being used on UHF frequencies? The spring would act either like a choke or a resonant circuit with stray capacitance. Needless to say that we replaced them with the proper T's. 73, Tony VE3DWI --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, Steve Peg [EMAIL PROTECTED] wrote: I recall a problem with a UHF repeater with terrible desense that I had some 30 years ago. The original installer didn't have an N connector for the pigtail and used an N to BNC female adapter and stuck one wire of the RG8 in the center hole and soldered the braid to the outside. Needless to say it didn't work. Replacing that thing (which I still have) corrected the problem and it ended its service life with my repair. Steve KB3FPN
RE: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis
Hi Jesse, The MSR2000 processes the audio, and does de-emphasis, on the R1-Audio board before it goes through the various paths to the exciter where it gets pre-emphasized. 73, Tony VE3DWI From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jesse Lloyd Sent: April 14, 2008 13:23 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis Hey all, MSR2000 does the exciter do any pre-emphasis, or is the repeater designed to use flat audio stock from Motorola? I know the local speaker de-emphases audio, but repeat audio, does it get de-emphasised then pre-emphasised at the exciter? Thanks, Jesse
RE: [Repeater-Builder] Re: MSR2000 Exciter audio pre-emphasis
Jesse, Again here is the text from my first reply. The MSR2000 processes the audio, and does de-emphasis, on the R1-Audio board before it goes through the various paths to the exciter where it gets pre-emphasized. If you have the manual, look at the RF control chassis where all the interconnections between the various modules and cards get inter-connected. From the receiver, the discriminator detected audio goes from pin 5 to the R1 audio squelch card pin 7. On the R1 audio squelch card the audio goes through the variable gain amplifier, the R7 level adjust, the audio mute gate, then the de-emphasis amplifier and finally to the card edge pin 17. From there (depending on different versions of RF control chassis) it goes to pin 17 on the squelch-gate card etc. etc. So the general audio used for the local speaker and in the case of the basic repeater system comes De-Emphasised from the R1 Audio-Squelch module. 73, Tony VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jesse Lloyd Sent: April 14, 2008 18:29 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: MSR2000 Exciter audio pre-emphasis From what I have read in the manual, the receiver board puts out discriminator audio, and the exciter modulates direct FM with no pre-emphasis. So with a MSR200 repeater in its simplest form Receiver, Station Control Card, Squelch Gate, Exciter, I would suspect that the audio remains unchanged though the whole system. Am I right? Jesse On Mon, Apr 14, 2008 at 10:23 AM, Jesse Lloyd [EMAIL PROTECTED] mailto:ve7lyd%40gmail.com com wrote: Hey all, MSR2000 does the exciter do any pre-emphasis, or is the repeater designed to use flat audio stock from Motorola? I know the local speaker de-emphases audio, but repeat audio, does it get de-emphasised then pre-emphasised at the exciter? Thanks, Jesse
RE: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis
Jesse, In the exciter description paragraph 2.1 TRANSMIT AUDIO CIRCUIT it states, Exciter audio from the station control module (or test microphone) is applied to audio amplifier Q501, then routed to the clipper/pre-emphasis circuit of Q502 and Q503. etc. etc. It's all there for you to read. I do hope that you have a manual? 73, Tony VE3DWI _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jesse Lloyd Sent: April 14, 2008 19:44 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis I know R1 card does have a de-emphasis circuit, but I thought that was for the local speaker only, and that repeat audio doesn't go through that card. Any idea which components in the exciter pre-emphasize the audio? Jesse On Mon, Apr 14, 2008 at 3:47 PM, Tony Lelieveld [EMAIL PROTECTED] mailto:ve3dwi%40xplornet.com com wrote: Hi Jesse, The MSR2000 processes the audio, and does de-emphasis, on the R1-Audio board before it goes through the various paths to the exciter where it gets pre-emphasized. 73, Tony VE3DWI From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of Jesse Lloyd Sent: April 14, 2008 13:23 To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: [Repeater-Builder] MSR2000 Exciter audio pre-emphasis Hey all, MSR2000 does the exciter do any pre-emphasis, or is the repeater designed to use flat audio stock from Motorola? I know the local speaker de-emphases audio, but repeat audio, does it get de-emphasised then pre-emphasised at the exciter? Thanks, Jesse
[Repeater-Builder] R2008D Service Monitor
Hi all, I posted this before (Apr. 01, 2007 NO JOKE) Msg# 70745. Since I never had a reply, I am hoping that we may have some new members who can help out. Copy of previous posting: Hi Gang, My Motorola R2008D service monitor went pooof the other day, blew the AC fuse and let the all important smoke out of a certain part. I have traced the problem to, what appears to be, a blown up RT (MOV?) on the A3 power supply module. Can anyone please supply me with a schematic for this module and/or a part number for the RT? I am posting a picture of the module on the list site which shows RT1 and , what I assume is, RT2 which is the one that the smoke escaped out of. Thanks for any replies es 73. Tony VE3DWI
[Repeater-Builder] R2008D Service Monitor
Hi Gang, My Motorola R2008D service monitor went pooof the other day, blew the AC fuse and let the all important smoke out of a certain part. I have traced the problem to, what appears to be, a blown up RT (MOV?) on the A3 power supply module. Can anyone please supply me with a schematic for this module and/or a part number for the RT? I am posting a picture of the module on the list site which shows RT1 and , what I assume is, RT2 which is the one that the smoke escaped out of. Thanks for any replies es 73. Tony VE3DWI
RE: [Repeater-Builder] Ultimate test coax cables
Gary You are so right. Apart from that, one time we had a heck of a time with the same item (in service) where the spring was all rusted and corroded into 3 pieces. I have nothing against Radio Shack and frequent the place regularly for various reasons but IMHO stay away from their RF connectors. Most, if not all of them, are of substandard electrical and mechanical quality. Tony, VE3DWI While the discussion is about proper and quality cable, don't forget to keep away from PL 259 style Tee connectors sold by Radio Shack. They have a little coil spring that puts pressure on the center conductor going between both SO 239 ends. This little springis the center connectionand it also is a RF coil and acts as an inductor that will play havoc on 440 MHz area and above frequencies. I cut one in half with a hacksaw and the spring on center conductor isquite obvious. Use only quality connectors. Gary K2UQ 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] Repeater Grounding
Glenn, I went to the below mentioned link and it comes back with page not found. If I delete the last part referring to the file name, I get into tscm.com but there is no reference to the grounding article. Is there perhaps anything missing? Tnx Tony VE3DWI Down load a copy of MIL-HDBK-419 Grounding, Bonding, and Shielding for Electronic Equipments and Facilities http://tscm.com/MIL-HDBK-419A.PDF , this is the military handbook on grounding. It is large and in two volumes about 812 pages. One is theory, the other is practice. Covers grounding for safety, lightning, nuclear blast and most everything else. A very good read and eye opener. 73 Glenn WB4UIV 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] Help needed with TX combiner problem
Alex, You have a nice list of frequencies but I wished they were not so evenly spaced with both the TX and RX frequencies separated by exact equal amounts. This way if any IM exists, it will be right on an RX frequency. I did an IM analysis with the good news that there is only one 9th order IM but 69 11th order IM's. If I include 13th order IM's there are as many as 639. The bad news is that every IM falls exactly on an RX frequency of one of the six channels. However, 13th, and higher order, IM products are usually not causing too much trouble. But if they are right on frequency as in your case they may show up depending on antenna selection and antenna combination. We have had special antennas made with all the Aluminium junctions welded as much as was possible. In other words, as few clamps and bolt/nut type hardware that mechanical integrity allowed. ANY loose hardware on the tower/antenna structure is a candidate for creating IM problems. All cables should be new and of the double shielded variety. Proper connectors, specifically designed for the cable to be used, are a must. All connectors should be as tight as possible without creating mechanical stress on them. We have trunking systems with as many as 7 channels combined with 3 or four other conventional VHF repeaters and no IM and/or desensing. TX RX spacing is usually 4.02 MHz and TX/TX spacing is as little as 190 kHz. They are all multi coupled with Sinclair C2027 and C2037 multi coupling units over two or three antennas and where TX/TX spacing is less than 200 kHz Isolators are used. Great care is taken to have TX frequencies that may create IM products separated on different antennas. Generally two antennas such as the Sinclair 210C4 on one mast above each other should have an isolation of at least 25 dB. This will be different if one is on the top and the other one is side mounted on the tower. Greater vertical separation will help. I have attached a file that shows the relationship of the 9th and all 11th order IM products with the TX frequencies that are involved. For example (161.125 X 5)-(160.125 X 4) creates a 9th order IM on exactly 165.125 MHz. It does not take a strong IM signal to be heard this way. And there is no way to filter that out other than preventing the IM from being created. I wish you good luck and hope that you will be able to solve this annoying issue. 73, Tony Lelieveld VE3DWI -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jeff DePolo WN3A Sent: August 3, 2005 11:21 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Help needed with TX combiner problem Not knowing what the Telewave and Sinclair part numbers translate into in terms of the actual hardware in use, you'll need to provide some details. First of all, what kind of filtering is done on the tx combiner and rx multicoupler? Is the tx combiner hybrid-ferrite or cavity-ferrite? What is the measured isolation between antennas (if known)? Since all of the tx's are spaced at 200 kHz and all of the rx's are also spaced at 200 kHz, if there is any nonlinearity in the receive portion of the system (due to preamp overload, front end overload, etc.), there is a good chance that the desired signal is mixing with the transmitters, yielding new products that fall onto the other receive channels. Not knowing any other details, that would be my best-guess as to what's happening. If this is, in fact, the case, then there needs to be additional isolation between transmitters and receivers, either by increasing the antenna-to-antenna isolation, or adding additional filtering ahead of the preamp/power divider in the rx multicoupler to further attenuate the tx carriers. The less-likely cause would be a passive (external) mix such as in a rusty tower joint or guy wire hardware, but that type of mix is usually of the variety of only the transmitter carriers mixing, i.e. the much weaker receive signal transmitted by a user in the far field wouldn't contribute an appreciable level to the mix. --- Jeff Jeff DePolo WN3A - [EMAIL PROTECTED] Broadcast and Communications Consultant -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of vintageaudio2004 Sent: Wednesday, August 03, 2005 10:52 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Help needed with TX combiner problem Hello, I just installed a new 6-ch VHF MPT1327 system using MTR2000 Motorola repeaters (100W) with optional preselectors installed, a Telewave M101-150-6TRM combiner, and Sinclair RM201-112S1B RX multicoupler. Antenna system is two DB228, one RX, one TX. RX antenna in on top of tower, RX is a bit lower from about half the tower down. Tower is 90FT. Frequencies used are: CH1 - T160.125 R165.125 CH2 - T160.325 R165.325
RE: [Repeater-Builder] Name that Duplexer!
Mike, From looking at the pictures I'd say that it is a similar duplexer as the WACOM type but instead of using stubs they use capacitors in the loop. Likely similar to the Sinclair models. Tuning is probably the same procedure as the WAYCOM duplexer but you adjust the capacitor instead of the stub. I hazard a guess that the capacitor tunes the reject frequency and the tuning rod the pass frequency. If you have the proper test equipment, or know somebody who has, it would not be hard to find it out by looking at the pass/reject curve while making a small adjustment on the capacitor. Good luck es 73, Tony VE3DWI Greetings all, My club has a spare set up duplexers that we want to have ready for use in the event we ever need them. Unfortunately, we don't know what they are and they have no markings on them to help us find out who the manufacturer is. They are tuned for 2 meters (146.25/85) each can is just under 8 inches in diameter and about 21 inches to the top of the can. They do not have capacitive stubs like the WACOM duplexers, but each can has a small box on top with a screwdriver adjustment (I assume it's a capacitor) labeled either 'High Freq Pass' or 'Low Freq Pass'. I've uploaded pictures to: http://community.webshots.com/user/wa4ort. Can anybody identify them for us? Next question... where can I find a manual so I can tune them? Thanks, -- de WM4B Mike Kathleen, GA 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] Motorola UHF Duplexer
To Late. Weve got ur number now !!! hi.. hi.. From: Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com] On Behalf Of N9WYS Sent: July 26, 2005 00:33 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Motorola UHF Duplexer Sorry gang, this was supposed to be off-list. I guess I need to watch the return addresses more closely Mark -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com]On Behalf Of N9WYS Sent: Monday, July 25, 2005 11:28 PM To: Repeater-Builder@yahoogroups.com Cc: Subject: RE: [Repeater-Builder] Motorola UHF Duplexer Importance: High Gerry, YES ABSOLTUELY I am still interested!!! snip 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: Use a band pass filter between pass-reject duplexer and antenna?
Hi all, This topic is very well described in an article (on Kevin's website) by Jacques Audet VE2AZX. It is a large file but well worth the time downloading. You will find an excellent explanation of the various types of duplexers in which, at the end, he recommends this discussed configuration as the best combination of cavities to form a good duplexer. Go to this link http://www.repeater-builder.com/rbtip/ant-sys-index.html And scroll down to the article in PDF format Theory and Testing of Duplexers by Jacques Audet VE2AZX This is a large (60 pages) technical write-up that should be titled Duplexers 101. Well worth reading. 73, Tony VE3DWI ** Eric Lemmon WB6FLY gave the best response to my question of how common is it to place a bandpass fillter betweeen antenna and duplexer. Most assumed a ham repeater with tx circulator and high rejection pass/reject duplexer which is correct. About 25 years ago I had Wacom retrofit a 4 cavity bp/br 2 meter duplexer with two pass cavities. One for the receive side to provide out of band rejection and one on the transmitt side to make it ballanced looking if for nothing else. The repeater was in an area with lots of other transmitters near it. Must have been over 100 antennas in a 3 block area. Later I noticed they were offering that design in their catalog. Seems most bp/br duplexers do not really have taht much rejection of out of band signals. Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs 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/ 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] Fw: receiver
John, If I think that what you think is what I think you are thinking, do you mean to say. Will there be a noticeable difference in range between a receiver having a sensitivity of 0.30 as opposed to 0.35 uVolt? No you would not be able to tell the difference. 73, Tony VE3DWI From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Maire-Radios Sent: July 22, 2005 17:27 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Fw: receiver Subject: receiver on 2 meter band if the receiver is .30 or .35 do you think we could tell on the operation range on the receive? thanks john 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] 6 mtr Duplexer
Steve Here is a link to a very interesting Heliax build 6 meter duplexer. There is a lot of information and good reading on the subject. http://www.dallas.net/%7Ejvpoll/dup6m/dup6m.html 73, Tony VE3DWI 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] MSF5000 Questions
To my knowledge, MSF5000 radios are RSS programmable. 73, Tony VE3DWI. -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Adam C. Feuer Sent: July 14, 2005 08:07 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] MSF5000 Questions Hello All, I have obtained a very good condition MSF5000 repeater. The Model # is C73CXB-7106BT. I'm wondering if this is RSS programmable or whether a prom has to be burned. Also wondering if it will receive on 144.57 and transmit on 145.170. Any help is greatly appreciated and Thanks! Adam N2ACF 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] Repeater heard on Aviation Channel! HELP
Gary may very well be on the right track. We have a repeater on 146.640 which was being heard by, and keying up, a repeater on 146.680 (input 146.080). Someone un-authorised had fooled around with the duplexer tuning which resulted in the TX putting 45 Watt into the duplexer but only 3 Watt came out of it. Checking the output on a Spectrum Analyzer revealed a Christmas tree look-a-like display as the TX had gone spurious due to the weird impedance mismatch. After retuning the duplexer with a Vector Network Analyzer (I am fortunate enough to have the use of one at work) the problem disappeared and all was well again. This reminds me of an incident many years ago when Industry Canada (then called DOC) contacted us re a ham 2 meter mobile interfering with aircraft communications. To make a long story short, the local ham wanted more power out of his transmitter and had physically adjusted the low pass filter (the push and squeeze method) for more output power. He also defeated the purpose of the filter and all kinds of crap was getting through as well. His Watt meter showed some more power but since it is essentially a non frequency selective device, it didnt care what was going through. Which brings up another story of a tech who could not match a wave mobile antenna to a transmitter no matter how he cut the whip. Again the Spec A showed that the TX was badly spurious and the antenna was showing lots of reflected power because of it. Once the PA was tuned properly so that the spurious signals disappeared, the antenna matched just fine. Sometimes you have to use the proper test equipment to see what is going on. 73, Tony VE3DWI From: Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com] On Behalf Of Gary Laforce Sent: July 7, 2005 12:23 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Repeater heard on Aviation Channel! HELP I have been reading these post for a couple of days now and seen in the original post that you are loosing 110 watts in the duplexer. Maybe Im the only one that thanks this may have something to do with the problem. What is the SWR between the tx side of the duplexer and the PA? What is the SWR between the antenna port and the feed line to the antenna? When was the last time the duplexer tuned and how was it tuned (i.e. by the watt meter method or by a tracking generator and a spectrum analyzer?) What is the rx signal sen thru the duplexer and also what is the rx sen on the antenna port of the rxer? You should not be loosing 60% of your power into the duplexer something is wrong there. On a 110 watt repeater you should see around 70-80 watts out of the duplexer at least I have seen a little more. Just my two cents Gary LaForce N0PBM
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RE: [Repeater-Builder] Inverting COS
Hi Wade, Nice drawings. I would suggest a 47K resistor from the transistor base to ground. I have had several occasions where the input to the base floated (neither pulled high or to ground) and it caused the transistor to operate erratically. 73, Tony VE3DWI Subject: Re: [Repeater-Builder] Inverting COS Here you go... You can even connect them together and we can end up right where we started. ;-) --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] tone trivia..?
Not just the second harmonic. A power supply with a 120 Hz ripple on it (poorly filtered full wave rectification) could deviate the TX sufficiently to cause some PL decoders to see it as a 118.8 Hz PL tone. Tony, VE3DWI -Original Message- From: Steve Grantham [mailto:[EMAIL PROTECTED] Sent: December 4, 2004 00:31 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] tone trivia..? Too close to the 2nd harmonic of 60 Hz... --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] Help with circulator specs
Hi John at all. Here is a Sinclair link which has all the manuals for tuning instructions of most, if not all, duplexers, filters, isolators etc. http://www.sinctech.com/services.asp?i=135 73, Tony VE3DWI --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] WA6SVT coaxial collinear results
Thanks Paul. Tony. * http://www.repeater-builder.com/antenna/wa6svt.html Paul N1BUG Yahoo! Groups Links --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] WA6SVT coaxial collinear results
This sounds like a very interesting project. As I somehow missed the start of this thread please let me/us know what the original project plan is and where it came from. Tnx Tony VE3DWI -Original Message- From: Paul Kelley [mailto:[EMAIL PROTECTED] Sent: October 31, 2004 07:26 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] WA6SVT coaxial collinear results Hi Mike, Jeff, et al. You can use the email any way you like. I didn't take pictures during construction, but wish I had. I didn't anticipate the interest! I will be starting construction on another one very soon and I promise I will get some pictures this time. What I didn't mention in my original email (because I wasn't sure I could describe it adequately) is that I used a slightly different approach to supporting the weight of the antenna inside the radome. Perhaps this will be of interest to someone, perhaps not. I will try to describe it, but this is where a picture would help. Refer to step 8 in the construction article. For 445 MHz the half wave brass tube would be 13.25. I made mine about 17 so the soldered connection to the RG-213 shield would be below the decoupling sleeve. After soldering the feedline braid to the brass tube, I put a 2 long piece of 1 diameter heavy wall heat shrink (the type lined with hot melt adhesive) over the joint and shrunk it in place. After letting that cool, I placed a 1 length of the same shrink tubing over the upper portion of the first piece. After shrinking and cooling, the bottom edge of this piece provides a shoulder which can be used to support the weight of the antenna. I made a round disc from a piece of 1/4 thick delrin plate (other materials could be used) with a hole in the center just large enough to slip over the inner piece of heat shrink. I also drilled a couple of 1/4 holes in the disc for ventilation. Once the antenna is in the radome, 3 or 4 small holes can be drilled through the radome into the edge of this disc, so that it can be secured into the radome with screws. Alternatively, the screws can protrude through the radome just below the disc to that it rests on top of the screws to carry the weight of the antenna. Be sure the screws are not long enough to damage the feedline. This method supports the weight from the bottom while keeping the antenna base centered in the radome. Paul On Sunday 31 October 2004 02:06 am, Mike WA6ILQ wrote: If Paul is amenable to it, I'll post his email as a web page indexed right under the original article. It will be a One person's results type of article (look at the 6m heliax duplexer article and it's One implementation of the above design) for an example of what I have in mind. And I agree - a few photos would be nice to have. Mike WA6ILQ At 02:53 PM 10/30/04, you wrote: Hey Paul, How about posting some pictures somewhere so we can see your creation? Thanks, Jeff N1KDO Yahoo! Groups Links --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] GROL - benefit?
I remember years ago there was an article in an MRT magazine about a TV station owner who had a ham working for him as a tech. While travelling to an out of town location to do a remote, they had lost the feed-horn from a link dish. The owner stated the tech made a temporary feed by taking a piece of coaxial cable stripping the insulation back, folding the braid and center conductor to create a dipole and used it It saved the day. He again said whenever I get a job applicant and if his/her resume shows being a HAM operator guess what Just goes to show you that it does have value. Tony VE3DWI It may not have any official benefit to many jobs, but it certainly can be an advantage as an additional factor on a resume. This also applies for an amateur radio license. It demonstrates that you have an interest in radio and have the ability to learn about a subject and pass an aptitude test. It may just be what gets you the interview, but probably will not what will get you the job.73, Joe, k1ike 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 the Yahoo! Terms of Service. --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004
RE: [Repeater-Builder] GE VHF Cavity identification
-Original Message- From: Dave [mailto:[EMAIL PROTECTED] Sent: October 19, 2004 13:05 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] GE VHF Cavity identification I'm wondering if these are notch or pass/reject or whatever cavities Dave. Since it has two connectors, one each on opposite sides, my bet would be that it is a band-pass cavity. To make a duplexer with band-pass cavities for a 2 meter repeater is nearly impossible. The split of 600 kHz is too close. If you have enough of them you could make one by using two in reject mode and one in band-pass mode in each leg of the duplexer. Put a T connector on one side and leave the other side unused. This way u can use it as a reject cavity. Will they tune up to 146 MHz is the question too. Tony VE3DI --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] GE VHF Cavity identification
Oops. I don't even seem to know my own call-sign. It should be signed Tony, VE3DWI -Original Message- From: Tony lelieveld [mailto:[EMAIL PROTECTED] Sent: October 19, 2004 20:30 To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] GE VHF Cavity identification -Original Message- From: Dave [mailto:[EMAIL PROTECTED] Sent: October 19, 2004 13:05 To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] GE VHF Cavity identification I'm wondering if these are notch or pass/reject or whatever cavities Dave. Since it has two connectors, one each on opposite sides, my bet would be that it is a band-pass cavity. To make a duplexer with band-pass cavities for a 2 meter repeater is nearly impossible. The split of 600 kHz is too close. If you have enough of them you could make one by using two in reject mode and one in band-pass mode in each leg of the duplexer. Put a T connector on one side and leave the other side unused. This way u can use it as a reject cavity. Will they tune up to 146 MHz is the question too. Tony VE3DI --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 Yahoo! Groups Links --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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 pitfalls
Hi all. One of my friends is getting a 2 meter repeater ready to put on the air. He asked for my advice regarding a duplexer for sale on e-bay. It is a Sinclair Q2330E. I looked at the pictures and it is in immaculate condition. The picture shows this duplexer to be on 168.750 and 169.875 MHz. I noticed one thing however. The tuning rods were sticking out only about 1.5 inch from the tightening nuts. I have tuned many of this type of duplexer in my work environment. To go from 169 down to 146 MHz the rods have to be pushed in by about 3 inches. No mention was made on e-bay that it had been tuned or used on 2 meters. In fact if it has not than this duplexer will not go down to 146 MHz because the rods are too short. Luckily he didn't put an offer on it as the seller did not reply to his questions on it. I am NOT saying that this information was withheld on purpose but it proofs the point of buyers beware. I also suggested to him to contact Sinclair re the possibility of having to replace the harness. Here is Sinclair's response verbatim. (note the unsolicited second comment) *** Subject: RE: Form Submission for Technical Assistance There is no need to change harness, but make sure the tuning rods are not cut or they will not be able to tune down to your freq, sometimes they were cut to fit into certain rack space. Systems Engineering Sinclair Technologies Phone (905)727-0165 ext 268 ** --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] DB-212 Harness
Does any one know the formula to make a harness for 2 of the db-212 and for 4 of them?Also how far apart?thanks Mike KC8FWD I have a PDF file at work on the DB-212 which gives information on all the 212 configurations. I will submit it as soon as I can. I do know that the cable coming from each dipole is 50 Ohm and where they join in a Y (now 25 Ohm) is a 1/4 wave stub made from 35 Ohm cable to get back to 50 Ohm again. 73, Tony VE3DWI --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] SWR at Isolator input
I too disagree. I have retuned VHF isolators by at least 6 MHz. Tony VE3DWI At 10/2/2004 06:15 PM, you wrote: Most ferrite isolators have a very narrow tuning range, 1 or 2 MHz at best. The tuning capacitors are intended to have a very narrow range. No way can you retune an isolator by 8 MHz using the capacitors! Really? I've retuned many isolators down from 460 to to 440 MHz encountered no problems. Bob NO6B Yahoo! Groups Links --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] Tower Painting and Lighting
If the glide slope is at a height of 190 ft at a distance of 4 miles from the runway, I will put in a prayer for all the poor pilots relying on this ILS system hi hi. Yep. They probably went by the slide slope (or whatever the other side of that is called - the rise slope?) and it came out to 190 feet at that distance. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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: detuned duplexer cause intermod?
Tim S. [EMAIL PROTECTED] wrote: Pretty sure I know the answer to this. But can a transmitter keying into a duplexer that's detuned cause intermod interference? It sure can. A local area repeater in Michigan on 146.64/04 was causing interference, and was being heard, on a 146.68/08 repeater about 60 miles away. Someone, un-authorized, had made adjustments to the duplexer (Tx out into duplexer 40 W, power out of duplexer 3 Watt). The picture on the spectrum analyzer looked like a Christmas tree as the PA was going into all kinds of spurious oscillations. After retuning with proper equipment (vector network analyzer) all interference stopped and the TX was clean again. An isolator will do the trick to protect the PA and reduce the chance of spurious oscillation and inter-modulation but it will not cure the problem. Retune the duplexer ASAP with proper equipment. 73, Tony VE3DWI --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] Recording repeater audio computer program
Hi John There is a website www.sagebrush.com which has a voice controlled soundcard type recorder called RecAll. It is designed for use with scanners etc. It should work well with a repeater. You can down-load a working demo version. 73, Tony, VE3DWI -Original Message- From: Mike WA6ILQ [mailto:[EMAIL PROTECTED] Sent: September 19, 2004 01:46 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Recording repeater audio computer program There's a program called Total Recorder that might do what you want. I forget the name of the company, but I put a link to it off of the very last entry on the Tech Info and Downloads page at www.repeater-builder.com Mike WA6ILQ At 10:25 PM 9/18/04, you wrote: Some time ago I remember seeing a discussion about a recording program that runs on a personal computer to record the audio from a repeater. Can some one direct me to where I can find this information? I have searched the messages and have not found it. Thanks, John, K7JL __ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail Yahoo! Groups Links Yahoo! Groups Links --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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: ts 64 pickup time?
Chuck is correct. The on-board included HIGH-PASS filter is used in the audio path to the controller to filter out PL tones. The PL tone decoder has its own LOW-PASS filter which allows only PL tones to pass to the decoder (maybe that is what Charles meant). The board audio input J1D (Green wire) feeds both the high and low pass filters. The high-pass filter output (usually goes to the controller) is J1G (Blue wire). The decode time specification for the TS-64 is 150 ms nominal. Good info can be found at the Communications-Specialist-Inc website site. http://www.com-spec.com/index1.htm 73, Tony VE3DWI -Original Message- From: Chuck Kelsey [mailto:[EMAIL PROTECTED] The Communications Specialists web site shows no such configuration. Chuck WB2EDV The TS-64 that I had included a filter for the decoder. It filters out audio and only passes the 30 Hz to 300 Hz audio. Then that audio is feed into the decoder input. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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] Waaaaaayy off topic, Bluegrass Festival at W3KKC's
Hi John. I didn't know you started playing the piano when you were just two years old. LOL J My repeater VA3DWI excites my guitar strings. Tony VE3DWI. Desbarats Ont. -Original Message- From: John J. Riddell [mailto:[EMAIL PROTECTED] Sent: September 10, 2004 14:38 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Waayy off topic, Bluegrass Festival at W3KKC's Kevin, How refreshing to read that you are a Musician as well... from A Piano Player for 53 years now ! Maybe we could make some music in the Flea Market at Dayton next year :-)) My repeater VE3WFM puts a good signal in to the room where the Piano is located :-)) John VE3AMZ Waterloo Ont. - Original Message - From: Kevin Custer [EMAIL PROTECTED] To: Repeater Builder Repeater-Builder@yahoogroups.com Sent: Friday, September 10, 2004 8:43 AM Subject: [Repeater-Builder] Waayy off topic, Bluegrass Festival at W3KKC's | Way Off Topic, but I know there are some folks on the list that enjoy | this type of music: | http://www.blue-grass.org/festival/index.html | | To keep this post in the realm of repeaters, some of my repeaters have | great coverage on the festival grounds grin | | Kevin Custer | List Owner / Upright Bass Player | | | | | | | 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/ --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004 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 the Yahoo! Terms of Service. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 19/08/2004
