RE: [Repeater-Builder] Seperate TX / RX antenna questions...
That is poor engineering practice. On any site with multiple transmitters you must use a Circulator and Low pass filter to prevent mixing in the amplifier stages. What you have happening is that the possible IM products that fall within the passband of the amplifier stages are being amplified and probably are causing your own interference. If you go to any website for a combiner company (TX/RX for example), you will see that on a TX combiner system you will have an Isolator/Circulator on the output of each transmitter, then fed to at least one 1/4 wave pass cavity and in most cases a two 3/4 wave cavities. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: lcradio2002 [mailto:[EMAIL PROTECTED] Sent: Monday, August 02, 2004 8:07 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Seperate TX / RX antenna questions... Group, I have 3 UHF repeaters (TKR850) at one site, and one is getting some inteference. The system has a single, top mounted (60') DB420 feeding a RX multicoupler (Sinclair with a window filter). From there it goes to each repeater receiver. On the TX side, each repeater has it's own antenna, a DB408D (there are two TX antenna at about the 20' level, antennas are about 6' apart horizontally). I tried running without any cavities or duplexers, and it worked OK, but one receiver would get hit and key up. I put a single duplexer can in the RX path and it helped a lot. My question has to do with the type of cavity filter to use. I have some of the MOT square duplexers lying around (BPBR), and some 8 diameter TXRX cavities (BP only). In a system like this, which is normally used? Is it normal to put the cavity on the RX side only, TX side only, or both sides? I have never seen a multicoupler / seperate TX antenna system up close, so I dont know what is normally done in industry. Thanks, Tracy 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] FAA Paint Removal
There is a section in the rules that require the coverage of paint on the tower and that's where people get into trouble these days with cable ladders and covering a whole side or two of the tower with Black Coaxes. They no longer meet the coverage requirements,thus the cables need to be painted. Of course nowadays if you go with Strobes for Daytime you don't have to worry about the painting coverage. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: Charles Miller [mailto:[EMAIL PROTECTED] Sent: Sunday, August 01, 2004 8:38 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] FAA Paint Removal Steve, I am not aware of any tower owners being fined for not having the coax painted. The reason for this is that the tower is put up, painted, and lighted before the coax is ever installed. I have also not seen anything in the FCC rules or FAA regulations that require the coax to be painted. On another subject that was mentioned, There are times that a tower does not require painting. I do not remember the particulars for these but it depends on the lighting of the tower, height and distance from the airport. If you have an instance where a tower owner was fined for not having coax painted I would like to read up on it. Charles Miller Sr. Electronics Technician Lead Field Service Technician City of Dallas, Communications, Radio Shop - Original Message - From: Steve Grantham [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, July 30, 2004 12:02 PM Subject: Re: [Repeater-Builder] FAA Paint Removal No... But they do require that some structures are painted, and those are not limited to by their proximity to an airport or airfield. And, there have been instances where folks were fined for having unpainted transmission line on painted structures. 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] 2 meter amps
In addition if you buy the newer line of Crescend that operate on 28 volts they are much more efficient and run extremely well. Most SMR operators in Wisconsin are using them on 450 to 470 as well as some 150 to 173 repeaters and they just love them. Of course they are a little pricey...but you do get what you pay for. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: russ [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 15, 2004 3:15 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 2 meter amps I gave up on the Henry Amps. They work very well till they break then watch out! We just up grade all 18 of our sites to Crescend high power amps. So far so good. They run cooler then the Henry. Higher power out and cleaner. I am very happy with the Crescend amp. Just a point I also run the Maggiore repeaters and just love them. 73 Russ, W3CH - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, June 15, 2004 2:55 PM Subject: RE: [Repeater-Builder] 2 meter amps I've run Henry 1/4 KW repeater amps on two machines for over 4 years, both are running strong, zero problems !! Rob K7EI -Original Message- From: Jed Barton [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 15, 2004 9:23 AM To: repeater-builder@yahoogroups.com Subject: [Repeater-Builder] 2 meter amps OK guys, Just got a dream sight. Now we need an amp. What will it be TPL or henry? I have a maggiore r1 repeater pushing about 35 watts. Ideas? Tanks, Jed Yahoo! Groups Links Yahoo! Groups Links 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] Re: MSR2000 VHF questions
Actually near the input to the amp under the cover is the exciter power control circuitfound that after searching the manuals. Getting 1.45 watts now and driving the amp at 45uA so all is good there, now to figure out that it's the next driver or the matched drivers that are badpretty sure it's the second driver in the amp. Guess time to order a transistor. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: Coy Hilton [mailto:[EMAIL PROTECTED] Sent: Sunday, June 06, 2004 7:08 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: MSR2000 VHF questions Gregg, Also remember, the drive to the amp is controlled by the amps power control. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Gregg Lengling [EMAIL PROTECTED] wrote: Okay not real familiar with the VHF version of this repeater, just need to know one thing. What is the minimum out of the exciter to drive the 110 watt amp. I'm thinking I'm a little light on drive and thus the amp doesn't always excite. Thanks in advance. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC 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] Re: Question on Motorola encryption
Oops forgot to say with the base encoder you also have Over the Air Rekeyingdefinitely a nice toy. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: bredalrv1 [mailto:[EMAIL PROTECTED] Sent: Monday, June 07, 2004 4:29 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Question on Motorola encryption Thanks Everyone for the help I appreciated it a lot sounds very expensive for the Motorola SecureNet. I have Contacted Transcrypt and they said That there SC20-DES Encryption Board would work through a Repeater without having to install one on the Repeater Site. just wanted to get your guys opinion on it. They said there is as Secure as Motorola DES-XL? Thanks Again In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: DVP is the lowest level of encryption DES/DVP were the 1st types. They found that there was range problems and the XL versions came out. DVP was sold to the general public, DES was only sold to government agencies. Both do not meet the current government standards. A conventional repeater will not pass either you need a M repeater setup for digital encryption. Dale 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] Re: Question on Motorola encryption
I've used them for Military Applications (ANG) and they work well. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: bredalrv1 [mailto:[EMAIL PROTECTED] Sent: Monday, June 07, 2004 4:29 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Question on Motorola encryption Thanks Everyone for the help I appreciated it a lot sounds very expensive for the Motorola SecureNet. I have Contacted Transcrypt and they said That there SC20-DES Encryption Board would work through a Repeater without having to install one on the Repeater Site. just wanted to get your guys opinion on it. They said there is as Secure as Motorola DES-XL? Thanks Again In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: DVP is the lowest level of encryption DES/DVP were the 1st types. They found that there was range problems and the XL versions came out. DVP was sold to the general public, DES was only sold to government agencies. Both do not meet the current government standards. A conventional repeater will not pass either you need a M repeater setup for digital encryption. Dale 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/
[Repeater-Builder] MSR2000 VHF questions
Okay not real familiar with the VHF version of this repeater, just need to know one thing. What is the minimum out of the exciter to drive the 110 watt amp. I'm thinking I'm a little light on drive and thus the amp doesn't always excite. Thanks in advance. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC 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] Desense
You better check the rules...there is an exemption in the rules to allow rebroadcast of NWS alerts on Amateur radio, but I don't see any to allow it on MURS. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: Don [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 01, 2004 6:26 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Desense I have a lot of Non Ham friends who use the Mur Freq 151.820 taking their HT To Little League Games Camping Etc , And I was going to set up a Legal 2 Watt Narrow/band FCC type accepted Radio , Whew had to get that out of the way first. Then tie that into My 440 repeater that I rebroadcast the NWS and Amber Alert Warnings . well the Testing I have done The Two Watts . De sensed the Weather receiver so bad It distorts the signal which is a strong one on a homemade outside ant at 20 Ft. 151.82 is also a homemade ant at 30 Ft. opposite side of QTH. Can I use some kind of Filter on the 162.425 Receiver to knock this down . In case No one knows about the Lic Free Murs Band http://www.provide.net/~prsg/murs_faq.htm We use it a lot in My area to bring Hams and Non Hams and people Interested in Communications together lots of radios in wife cars Etc. Thanks Don KA9QJG 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] Testing RX sensitivity while hooked to antenna
What you need is an Iso-T. These are available with usually at 60dB isolation. You can also make your own by removing the connection on the base leg of the T so you are no longer directly connected to the feedline from the service monitor. This should be placed in the antenna system between the antenna and duplexer to test. If you don't have a premade iso-t you will need to determine the loss at your frequency for your homemade one to get a real world measurement. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: Michael Singewald N1PLH [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 25, 2004 12:59 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Testing RX sensitivity while hooked to antenna A while back, the conversation was about bench sensitivity versus real world sensitivity. I would like to test the sensitivity of our repeater rx while hooked up to the duplexer, feedline and antenna. I think I need some kind of T connector to put between the duplexer and receiver. I don't think it would be a standard T, so my question is what exactly do I need? Thanks 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] Maxtracs as Repeaters, some Questions (no flames included)
Actually they are a real pain and take lots of work and modifications. You are better off trying to find some 900 Meg versionsgo and join [EMAIL PROTECTED] and you'll learn a lot. No flame intended just info. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: Mark Tomany [mailto:[EMAIL PROTECTED] Sent: Saturday, May 22, 2004 6:16 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Maxtracs as Repeaters, some Questions (no flames included) OK - time for my stupid question of the day. I have access to several 800 MHz Maxtracs. Can these be moved up sufficiently to get them into the 902/903 MHz range? We want to start adding remote receive links to our 444.55 repeater, and we'd like to use 902/903 for the link freqs. (We already have acquired a 6-channel voter...) I'm totally new to this voter thing, so please be gentle! :-) Thanks! Mark - N9WYS -Original Message- From: James [mailto:[EMAIL PROTECTED] Sent: Saturday, May 22, 2004 12:41 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Maxtracs as Repeaters, some Questions (no flames included) Maxtracs, GM300, and CDM series are all good radios! [EMAIL PROTECTED] wrote: Hi All! As the title suggests, I have a couple of questions about the use of Maxtracs as repeater radios, links, etc. I'm a die hard Micor man with 3 Micor and 1 Mastr II repeaters on the air so forgive me as I movefrom 1970s to1990s technology! Hi Hi!! I hope these don't sound to elementary. All the time. If yours will allow you to program the pins .. its easy. I have used S-com, and Link-Comm controllers on Maxtracs, CDM series, GM series radios. 1. I've seen the MRT articles for linking 2 maxtracs together, besides theRICK and these adapters,has anyone rig a full blown controller, say a Scom 7k to these bad boys using the 16 pin plug on the back? 2. Under the software control of these radios (RSS) can the RF power out be dialed down low enough as not to mess the finials and still drive an external PA? Low enough maybe to drive a Micor 60-100 PA. (In the Micor, if you turn the power down to low the finals don't like it... a lot!) Is your radio a 40 or 45 watt version ... then it will only go down to 20 watts and still hold specs. If it is a 20 watt version, then it will go all the way down to 1 watt (model # beginning with D44 is UHF high power, D43 is VHF hi power, D33 is VHF low, D34 is UHF low) 3. Not being as robust as a micor/mastrII, what about heat, cooling, fans? Do these radios have any kind of continuos duty rating? I use cooling fans on even the ones that are just link radios. I also run them at 20 watts for hiigh power units, or 10 watts for low power units. 4. Some have called these radios barn doors for being so wide open on the front end. Has this been a problem? Can they be preselected? This was a good thing on the Micors! I preselect them using bandpass cavities, or you can use the DCI filters or celwave preselectors (the latter mentioned is sold as an option with this type unit for repeater use.) 5. What other pit falls have I missed? Check the PA transistors, I usually resolder them with silver solder. If you do not do this, and they get a little too warm, they will unsolder themselves. The silver solder gives you a little more temperature range. A couple of Club members in our weather spotter group are crossbanding an UHF to VHF maxtracs to get back to the repeater and it sounds good and is surprising simple (KISS) to rig and operate. It almost seems to simple. I know this is basically a GR300 so how do they compare? A GR300 is just two GM300 mobiles in a box with a Rick interface and usually a celwave notch only duplexer with 15 amp supply. They have done their homework so now I need to do mine! Thanks all! Keep the flames to a minimum! Brian, WD9HSY PS ... OH Boy! SMT! Just what I need with Bifocals! 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.
RE: [Repeater-Builder] ts-64 and a micor repeater station
Sure it's easy to do, you can get Disc. Audio to run the decode right off the backplane and transmit can be input thru the backplane also to the PL input of the exciter. You should have both manuals for the station so you can find all the points. You need the RF manual and the Control manual. I'd tell you the exact points but without the manuals you can't be sure everything is proper as sometimes if it was a Carrier Squelch station, the PL input path to the exciter may not be complete. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA, WERA and ORC -Original Message- From: David Schornak [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 19, 2004 11:25 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ts-64 and a micor repeater station has anyone installed a ts-64 into a micor base/repeater station? is so does anyone have the layout of where to make all the connections? if not is there a better way to get tone decode and encode on a micor without having to buy a tone encode and decode and the two reeds for them? 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] Kenwood TKR-820
It requires either the KPT10 or KPT50 programmer. The 10 is a standalone unit (I have one) and the 50 is a riblike device that also can use a laptop. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA and ORC -Original Message- From: jimcorreia258 [mailto:[EMAIL PROTECTED] Sent: Saturday, May 15, 2004 2:11 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Kenwood TKR-820 I need the owners or service manual for the Kenwood TKR-820 I need to reprogram it. I want to put this repeater on GMRS. It does have the built in duplexer. Any help is appreciated. 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] Kenwood TKR-820
That was a typoI knew that and I have both the 10 and the 20...just too early on a Sunday MorningDOH! Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA and ORC -Original Message- From: Andy Brinkley [mailto:[EMAIL PROTECTED] Sent: Sunday, May 16, 2004 7:41 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Kenwood TKR-820 Greg - The 20 series requires the KPT-20 or KPT-50. The KPT-10 is the prom burner for the 01 series radios. Andy -- NC Certified Firefighter III / Instructor II / EMT-A FCC Licensed Technician / Amateur Call NC4AB / Echolink Node 5761 http://www.brinkleyelectronics.com -Original Message- From: Gregg Lengling [mailto:[EMAIL PROTECTED] Sent: Sunday, May 16, 2004 8:42 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Kenwood TKR-820 It requires either the KPT10 or KPT50 programmer. The 10 is a standalone unit (I have one) and the 50 is a riblike device that also can use a laptop. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Member: ARRL, RSGB, RCA and ORC 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/
[Repeater-Builder] Need Power Tr's for MSR
Looking for a M1131 and a M1132 for the predriver/driver stages of a VHF MSR2000 110 watt continuous duty amp. Anyone have any laying around??? Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View 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 Power Amplifier
There were 2 different versions...which one??? Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: ke6rim [mailto:[EMAIL PROTECTED] Sent: Monday, May 10, 2004 11:22 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola UHF Power Amplifier Does anyone have any information on a Motorola 'Quarter-K' UHF Power Amplifier. Thank you for your time. 73's 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] 2m repeater IMD issue
Proper engineering also requires a Low Pass filter when installing an isolator, this will restrict any incoming frequencies above your operating frequency...although this is not the reason for the low pass filter...it is there to protect you from radiating any mixes at higher frequencies. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Richard Sharp, KQ4KX [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 05, 2004 9:35 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] 2m repeater IMD issue Well, I considered that too. However, after further study of isolators (and discussing my situation with a manufacturer of isolators) I discovered that a VHF isolator will not stop signals in the 800MHz range from passing through it. An isolator should work great if I was dealing with several VHF transmitters at the same level on the tower. I'm wondering if the IMD is being generated somewhere on the tower, antenna(s), etc.? A bandpass cavity on the tx drops the 800MHz signal levels (as seen at the tx port) from -40dBm to -75dBm. I would think levels of -75dBm shouldn't be a problem for the 2m tx? The harmonic filter in the tx should drop the -75 to nearly nothing - right? That's why I'm thinking perhaps the IMD is being generated somewhere else. Although, it does only occur when the 2m tx is on. tnx Richard -Original Message- From: Charles Miller Richard, You said that the IMD is only there when YOUR TX in on. If this is the case you may need an Isolator for your TX. I had a site that was getting eat alive with IMD at 150 MHz only when the TX was on. Found out that the IMD was being generated in the transmitter. Put an isolator on the thing and no more IMD. Just a thought 8-) Charles Miller - Original Message - [snip] I can see carriers appear and disappear on the rx side when the tx is on. [snip] 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] Duplexer Alignment
There is a rough adjust and a fine adjust. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Mathew Quaife [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 27, 2004 3:26 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Duplexer Alignment Ok, most of that I understand, and I know there is the main tuning rod, then there is the reject high and reject low tuning pots, but there is a third tuning rod on these duplexers, what would be thier function. Mathew - Original Message - From: Gregg Lengling [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, April 27, 2004 3:14 PM Subject: RE: [Repeater-Builder] Duplexer Alignment You should really be using a return loss bridge and a spectrum analyzer and tracking generatorbut yes I know we can't all afford that equipment. You can fudge by using a signal generator and a receiver, also never never never tune the duplexers under transmitter power. The first thing you need as previously stated is a 3dB pad on the input to your receiver you are going to use as signal strength indicator. You will also need a 50 ohm termination for the unused port of the duplexer during tuning. The pad is similar to those used in cable tv systems...HOWEVER..those pads are 75ohms and you have a 50 ohm system. Step one, Hook your generator to the antenna port and your receiver (with 3dB pad) to either the transmit or receiver port. Terminate the other port (ie: if you are tuning the transmit port, terminate the receiver port). Before you start on the duplexor..hook your signal generator up to your receiver with the 3db pad in line and measure the receiver sensitivity of you receiver (ie: .022uV for 12dB Sinad)this is your reference. In this case we'll say your on the transmit port. The first thing to do is to tune the pass frequency..this is the plunger on each cavity in the transmitter side of the duplexer. Generate just enough signal to start movement of your receiver strength indicator using your transmit frequency. Now tune all the TX cans one at a time for max throughput...max signal strength...you will probably have to continually reduce your output from the generator as you get the unit tuned. Now look at the output level from the generatorhow many dB of insertion loss do you have compared to your receiver performance with the cavities in line. (Assume anywhere from .6 to 1.0 dB per cavity loss)...is this the expected value...if yes the pass is tuned..if not something is wrong. Next you will tune the notches.with everything still connected, now set the generator and receiver to your Notch Frequency (the receiver freq in this case). You can now tune the notches (usually in the little box on top of the coupling loop with a small access hole on the side...use an insulated non-metallic tool). Tune these to attenuate the signal reaching the receiver, one at a time. Now measure the difference between the generator output and the receiver known sensitivity. You should have anywhere between 85 and 100 dB of attenuation. In other words you'll have a huge amount of signal being generated by your signal generator. Now you're done with the transmit side. Now using the same set of instructions but with the frequencies reverseddo the same to the receive side. When both sides are done...go back and check all your measurements again and make sure you didn't screw up. Yes this will not be perfect using this procedure, but I've found you can be within a couple of dB of rejection specs, or as they say good enough for government work until you can beg/borrow/or steal the proper test equipment. Good luck. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Mathew Quaife [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 27, 2004 2:54 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Duplexer Alignment The duplexers are a set of TX/RX duplexers, six of them. When you say a 3db pad, that is something that I am not sure of, is this basically the same thing as a db pad used in CATV systems? All I know is that the duplexers were set up as a Varinotch filter system. Mathew - Original Message - From: Ken Arck [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, April 27, 2004 2:49 PM Subject: Re: [Repeater-Builder] Duplexer Alignment At 07:40 PM 4/27/2004 -, you wrote: Is there any methods of tuning a set of duplexer without having a Spectrum analyzer. I am
RE: [Repeater-Builder] Duplexer Alignment
You should really be using a return loss bridge and a spectrum analyzer and tracking generatorbut yes I know we can't all afford that equipment. You can fudge by using a signal generator and a receiver, also never never never tune the duplexers under transmitter power. The first thing you need as previously stated is a 3dB pad on the input to your receiver you are going to use as signal strength indicator. You will also need a 50 ohm termination for the unused port of the duplexer during tuning. The pad is similar to those used in cable tv systems...HOWEVER..those pads are 75ohms and you have a 50 ohm system. Step one, Hook your generator to the antenna port and your receiver (with 3dB pad) to either the transmit or receiver port. Terminate the other port (ie: if you are tuning the transmit port, terminate the receiver port). Before you start on the duplexor..hook your signal generator up to your receiver with the 3db pad in line and measure the receiver sensitivity of you receiver (ie: .022uV for 12dB Sinad)this is your reference. In this case we'll say your on the transmit port. The first thing to do is to tune the pass frequency..this is the plunger on each cavity in the transmitter side of the duplexer. Generate just enough signal to start movement of your receiver strength indicator using your transmit frequency. Now tune all the TX cans one at a time for max throughput...max signal strength...you will probably have to continually reduce your output from the generator as you get the unit tuned. Now look at the output level from the generatorhow many dB of insertion loss do you have compared to your receiver performance with the cavities in line. (Assume anywhere from .6 to 1.0 dB per cavity loss)...is this the expected value...if yes the pass is tuned..if not something is wrong. Next you will tune the notches.with everything still connected, now set the generator and receiver to your Notch Frequency (the receiver freq in this case). You can now tune the notches (usually in the little box on top of the coupling loop with a small access hole on the side...use an insulated non-metallic tool). Tune these to attenuate the signal reaching the receiver, one at a time. Now measure the difference between the generator output and the receiver known sensitivity. You should have anywhere between 85 and 100 dB of attenuation. In other words you'll have a huge amount of signal being generated by your signal generator. Now you're done with the transmit side. Now using the same set of instructions but with the frequencies reverseddo the same to the receive side. When both sides are done...go back and check all your measurements again and make sure you didn't screw up. Yes this will not be perfect using this procedure, but I've found you can be within a couple of dB of rejection specs, or as they say good enough for government work until you can beg/borrow/or steal the proper test equipment. Good luck. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Mathew Quaife [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 27, 2004 2:54 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Duplexer Alignment The duplexers are a set of TX/RX duplexers, six of them. When you say a 3db pad, that is something that I am not sure of, is this basically the same thing as a db pad used in CATV systems? All I know is that the duplexers were set up as a Varinotch filter system. Mathew - Original Message - From: Ken Arck [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, April 27, 2004 2:49 PM Subject: Re: [Repeater-Builder] Duplexer Alignment At 07:40 PM 4/27/2004 -, you wrote: Is there any methods of tuning a set of duplexer without having a Spectrum analyzer. I am in the learning stages again. I have an IFR-500a, so I can generate a signal into them. I know this would work somewhat for the receive, but what does one do for the transmit. ---Why wouldn't it work for transmit? As a matter of fact, it would work just fine by both the receive AND transmit sides of the duplexer. RF is RF, regardless if its -100 Dbm or +10 Dbm, right? Depending on what kind of duplexer is it (BP/BR or just BR) determines the tuning procedure. You might want to check the website to see if yours is listed. One thing though - It's a good idea to use a 3 db pad on the receiver you're using for tuning, since you have no guarantee it will present a 50 ohm load to the duplexer. Oh, and don't forget to make sure a 50 ohm load is on the duplexer port not currently being tuned as well (a 3 db pad would work here as well). Ken -- President and CTO -
RE: [Repeater-Builder] (unknown)
Yes they can be recrystalled and retuned for the Ham bands...but no they cannot do both...the receiver and transmitter bandwidths are way too tight (small range). Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: rtoplus [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 21, 2004 10:50 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] (unknown) Greetings OK...OK...this is off topic, I'm sorry. I posted the same thing in the Motorola group and I'm not sure it'll be answered there so I thought I'd post it here too. I have acquired a bunch of ht440's and ht90's. Currently crystled for service in the 154 mhz area. I checked out batlabs (and did a google search with no evail), and me not being too electronicly inclined (I can tune a radio, just didn't understand some of what they presented), am wondering if these radios can be rock'd for (and work well) around 146 mhz. And if so, in the same radio, these are 4 channel units, would they support a couple of channels at 146 and a couple at 152/159 mhz. I'm not gonna replace a bunch of parts...it ain't worth my time...but if all is needed is the correct crystal and alignment, then that's ok. I like the brick feel of these radios and I'd like to put them into service if feasable. I have a service manual also by the way. Ya'll please forgive me for posting here, but I hate to see good equipment going to waste in my basement. thanks Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892 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] FCC considers Auxiliary Operation on 2M!
Kenwood is just trying to market something they mis-designed a number of years ago and haven't been able to really sell it to the US Hams. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Richard MI Ranta [mailto:[EMAIL PROTECTED] Sent: Thursday, April 15, 2004 7:37 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] FCC considers Auxiliary Operation on 2M! Somebody isn't thinking too clearly on this one. 2 meters is already way over crowded. I like the idea of UHF and even SUHF,. Why not, its only for auxiliary use. Richard Ranta K8JX 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] Hamtronics exciter
I've done the FM PL mods to this type of
transmitter to get direct FM for CTCSS injection. The modulator on that
exciter will not handle CTCSS so the mod is required for a nice clean PL. It's
a rather simple mod with only a few parts and is documented on the RepeaterBuilder
website.
Gregg R. Lengling, W9DHI, Retired
Administrator http://www.milwaukeehdtv.org
K2/100 S#3075 KX1 S# 57
Politics is the art of appearing candid and completely open, while concealing
as much as possible. -States: The Bene Gesserit View
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 14, 2004
2:05 PM
To:
Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder]
Hamtronics exciter
Hi Steve,
Does anyone think it would be
feasible or practical to modify the TA-51 to implement an LC phase
modulator? Just how easy or how difficult might that be?
You coulduse a varicap, a
tunable inductor, and a capacitor to build acircuit that'sresonant
at the crystal frequency, and that's fairly easy. But such a circuit also
generates an AM component that must be removed, so another transistor stage
isneeded for isolation. That probably meansyou're up to a little
perf-board ('blob') addition to the exciter.
BTW, we think that the GE PM exciter
suffers from a little of the sameinsufficient isolation problem, but
that's another rainy-day investigation.
Incidentally,the
RCversion of a phase modulatoris sometimes
calledareactance modulator,andthe LC version is called
atuned circuit modulator.
73,
Bob, WA9FBO
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RE: [Repeater-Builder] TKR-850 - Where to get CTCSS enable signal?
You need to program one of the programmable outputs to TOR (this is a logic signal that goes active with received signal and proper tone). Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: jfrohoff [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 14, 2004 1:50 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] TKR-850 - Where to get CTCSS enable signal? In the course of connecting my new TKR-850 to my Arcom RC210 controller I found out that the repeater's Squelch Control ouput is not actually a CTCSS squelch signal, it is a COS signal only. In other words, the SC pin goes from 5v to 0v whenever ANY signal is on the receiver channel, whether or not it has the right CTCSS with it. The CTCSS is enabled for the channel in the programming (173.8), but it only cuts off the audio. The CTCSS enable is not reflected on the repeater's SC pin. When I change to the wrong CTCSS code on my handheld, the receiver speaker is quiet, and no audio gets to the controller, but the busy light on the front lights and the SC pin goes to 0v. I cannot see any other output pin for CTCSS enable ... so my option appears to be either to use an external CTCSS decoder or to find a signal in the receiver that does reflect the true CTCSS enable state. Anyone deal with this issue on a TKR-850? Thanks! Jim K7RNR 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] Lightning Protection
Chuck is exactly correct. Before I retired I owned multiple towers and we used PolyPhaser and copper strapping at all the sites. I can send you pics of my ham tower (Rohn 55) with the PolyPhaser entrance. It's grounded using 6 copper strap and then 3 strap going to the operating positions. I've got about 12 different coaxes coming in with Polyphasers on them on the entrance panelincluding my Sat dish, TV antenna, repeater, HF, VHF, UHF antennas. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Chuck Kelsey [mailto:[EMAIL PROTECTED] Sent: Friday, April 09, 2004 10:19 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Lightning Protection According to PolyPhaser, the best grounding material is copper strap, then solid copper (or copper clad) wire. They don't recommend using stranded wire due to increasing inductance as the strands start to weather and corrode between each conductor. Chuck WB2EDV - Original Message - From: KD5SFA [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, April 09, 2004 9:51 AM Subject: RE: [Repeater-Builder] Lightning Protection Wouldn't a stranded copper wire do better in the event of a strike ? If I recall correctly, lightning has a fairly large AC component and likes to travel on the surface of the wire (Skin effect). Thus by having stranded wire, it could carry a larger current to the ground because you would have more surface area for it to run along. A number of people I know run 2/0 and 4/0 stranded copper from their tower legs to their grounding systems for that reason. 73, Jon KD5SFA 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 Money to be had
If you have a County RACES organization, many times you can get local funding as we have here. Also a large Energy Company (Electric Gas) gave a large grant to the ARES Statewide Group in Wisconsin last year for improving communications for emergencies. If I remember correctly the Energy Co. Grant was in or around 50K. The county funding to set up a new ARES command center and network for the County about 12 years ago was in the 40 to 50 K range. Just remember you need to have some sort of organization. The county system here of course remains the property of the county. While the grant from the Energy Company puts the equipment then in the ownership of the ARES group. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Sunday, April 04, 2004 10:35 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Repeater Money to be had Hello to the list. My question is this: Does anyone know if there is money to be had for repeater sites where there is vary limited radio communications of any kind. Does some government agencies have money for this purpose? Just a thought. Rod kc7vqr 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] I need to buffer a squelch gate --- HELP!
If you look at the schematic and go to the audio gate on the radio and use that switching level to switch your transistor buffer you will have a solid COR and no loading. Been theredone that! Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Dave [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 30, 2004 6:22 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] I need to buffer a squelch gate --- HELP! I use a couple of EF Johnson Challenger 71xx UHF mobile radios for the RX and TX side of one of my repeaters. Obviously there is no COR. A makeshift COR signal is the busy LED which works to a point. The busy LED lights up whenever there is ANY AND ALL signals on the frequency regardless of the PL tone. A static crash, the noise floor raising, a DX repeater, etc... it will trigger the transmit on the repeater, but the audio will not pass because that is filtered by the call guard (PL ). What I need to do is I need to grab the signal from the squelch gate trigger to make a true COR. However, directly taping to the trigger point with the controller loads down the whole thing and nothing is received. I've tried using a radio shack mpsa transistor to make a transistor switch and still, it loads it down. I'm thinking now of using a quad buffer/line driver or something like that, but thats going to use a lot of space. I'd prefer to just use a transistor or something. Something that I can solder flat to the PC board and not have to run a pile of wires and add a circuit board. Does anyone have any ideas --- know of any transistors that could be used that will not load down the gate/squelch? I need something that is almost transparrent to the gate trigger. Thanks Dave N9NLU 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] RX Attenuators. Good Source?
What exactly are you looking for, I have a bunch of left over 20 watt power attenuators from Bird. Willing to sell cheap. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: John Everson [mailto:[EMAIL PROTECTED] Sent: Friday, March 12, 2004 3:00 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] RX Attenuators. Good Source? Hello to the group. Has anyone found a good source for some inline attenuators like 3 to 9 db? I see the BNC type floating around at hamfests occasionally but I was wondering if there was a place that had some surplus or at least a place that wasn't charging an arm and a leg. I would like to tame a few preamps here and there. Thanks in advance. John ab6li 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 Pac/Rt
The Pac/RT is a simplex transceiveryou can't make a repeater out of it. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: s_alajeel [mailto:[EMAIL PROTECTED] Sent: Sunday, February 08, 2004 2:51 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola Pac/Rt hi I dont know if some one can tell me how i setup Motorola Pac/Rt mobile repeater, VHF, Model H13TTY3110ASP29 to stand alone repeater 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 for GMRS use-help needed??
Actually there aren't any specs that say that. What you have to make sure is that the tolerance specs from the transceivers used meet or exceed the specifications required under repeater service. Real repeaters usually have much tighter freq. drift error specs.. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Andy Brinkley [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 04, 2004 1:27 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Repeater for GMRS use-help needed?? Lee - I would be interested in the specific FCC Regs that prohibit a mobile (or base station) to be used as a repeater. I have seen many commercial repeaters made from two mobiles. Andy -- NC Certified Firefighter III / Instructor II / EMT-A FCC Licensed Technician / Amateur Call NC4AB http://www.brinkleyelectronics.com -Original Message- From: Lee Williams [mailto:[EMAIL PROTECTED] Sent: Monday, February 02, 2004 5:23 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Repeater for GMRS use-help needed?? Be very careful,mobiles are not type accepted for repeater use in the GMRS or commercial band. Check the rules to avoid a big fat fine,,,see www.fcc.gov 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] Re: Programming Cable for TKR-850
There is a schematic on kenwood2-way for the programming cable and by the waythe cable is the expensive part...the software is half the price of the cable. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: mch [mailto:[EMAIL PROTECTED] Sent: Friday, February 06, 2004 5:51 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Programming Cable for TKR-850 (cough) eBay (cough) Joe M. Derek B. McIntyre wrote: You will probably have to purchase the cable from a Kenwood dealer. The same cable programs TK-880's as well. They have an IC in the hood of the DB-25 connector. Would probably be difficult to duplicate. The cable doesn't cost that much. The software is what costs. Contact me off list if you need any help with that. Derek KC4FWC 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] CHANNEL ELEMENTS NEEDED
What they for...you don't say but sorta hint that they are for a MSR2000. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: baltofiberdude [mailto:[EMAIL PROTECTED] Sent: Sunday, January 18, 2004 1:19 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] CHANNEL ELEMENTS NEEDED Looking for 2 (1 Tx 1 Rx) channel elements in the 460-469 Mhz. range.. Freq is not important as they will be re xtalled for new freq.. I have been told they are the same as a Mitrek element.. Any help would be appreciated !!! Dave 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 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] wanted
ICM Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Danny Allen [mailto:[EMAIL PROTECTED] Sent: Sunday, January 18, 2004 4:30 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] wanted Where is the best place to purchase crystals for a micor repeater? Thanks Danny - Original Message - From: mch [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 18, 2004 4:55 PM Subject: Re: [Repeater-Builder] wanted Looks complete to me, Dave. Frame, driver, final board, filter board, power cables, and all. Looks like a base station model, too, as it has a T/R relay. With respect to what Mike is looking for, the power control circuit is on the driver board, so I guess you're looking for one that's missing only the final PA board and filter board? Joe M. - Original Message - From: [EMAIL PROTECTED] Motorola or Ge - There is a GE Repeater PA That looks like it is most likely dead on Ebay at this minute under test equipment - Item # 2589457740 I say it looks dead because all the components are removed that you would use on another one if you were replacing this one. Dave / NØATH - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 18, 2004 7:19 AM Subject: [Repeater-Builder] wanted Hi all Does anyone have a dead HI band PA that they would want to part with. I am looking for the chassis heatsink and the power control section still intact. contact me off line Thanks Mike [EMAIL PROTECTED] 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 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 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] Fuses on power cords
The reason some manufacturers include fuses on the Negative lead is for those installers that run both Pos and Neg directly to the battery of a vehicle. This is not a smart move as normally you create a ground loop in the negative system of the vehicle and usually end up with Alternator Whine. It is always better to attach the negative lead at the closest grounding point to the mobile radio. The reason behind the extra fuse is in case the chassis ground of the vehicle fails and you try to start the engine, the 100's of amps of current drawn by the starter will blow the fuse rather than using the radio as a ground. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Budd [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 07, 2004 9:18 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Fuses on power cords I'm caught in the middle of a couple of feuding technical experts on a probably trivial issue. Some Mobile radio power cords are fused on only the positive line. Others are fused on both lines. One's logic is you only need one fuse. The other maintains their communications shop lost all the radios with only one fuse to a shorted power supply and none of the dual fused radios were effected. The one fuse expert says that is BS and the other is lying. What is the collective experience/knowledge on here for this topic? Thanks in advance for your thoughts 73 Budd 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 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] Off topic questions
Does anyone have the service manual for the Kenwood 701A dual band mobile. I just fixed one by changing the 440 front end fet with the 144 front end fet (they are both the same)my buddy really just needed his UHF side working. But I would like to replace the bad fet (now in the 2 meter side) with a new one. The markings on it only say 3RS and nothing more. Thanks in advance. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View 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] Off topic questions
Thanks Chuck...I had to look twice as I thought this was the Ham Radio Deluxe group...they are known for their humorbut another helpful ham on this group has already scanned in the manual and sent it to me...in less than 10 minutes after I posted. Don't you just love the internet. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Chuck Kelsey [mailto:[EMAIL PROTECTED] Sent: Saturday, January 03, 2004 3:27 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Off topic questions Gregg - This is obviously a Radio Shack part 3RS. ANY Radio Shack sales clerk should be able to help you. . I just couldn't resist. I suppose I should apologize to anyone out there who works at Radio Shack, but would they understand? Chuck WB2EDV - Original Message - From: Gregg Lengling [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, January 03, 2004 3:21 PM Subject: [Repeater-Builder] Off topic questions The markings on it only say 3RS and nothing more. Thanks in advance. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View 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 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] Interesting scam
This is nothing new, SIGINT, signals intelligence divisions with the US and British government and I'm sure others have been doing this for years. That's why sensitive buildings have full shielding in the walls. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Jeff Otterson [mailto:[EMAIL PROTECTED] Sent: Monday, December 22, 2003 4:46 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Interesting scam That's called a Van Eck attack. Especially interesting of you do it with a repeater. Jeff At 05:42 PM 12/22/2003, you wrote: Not for this discussion board, but I had a demo from an Engineering firm that specialized in anti-eavesdropping devices. They were able to pick up radiation from my PC, and through some pretty cool DSP, they were able to pick out video signals going to the monitor , and re-assemble same to 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] use of Bp/Br duplexer as 2 channel combiner
We Have two repeaters at one location using two antennas and 2 duplexers, but because of the high-powered UHF paging TX we got too much desense on the top antenna for receive so we split to make the top TX only and the lower RX only. We had 2 micor stations with 2 TX/RX duplexers. By retuning the notches and then combining the RX cavities from each duplexer to the lower antenna and combing the output of the TX cavities to the top antenna we ended up with an excellent system. However if you are running a station that doesn't already have a circulator (it's integral in the micor 70 watt stations, one of ours was a 250 watt micor, so we added a circulator to the output) you will need to add the circulators to avoid mixing in the amps between the two transmitters. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: n1ofj [mailto:[EMAIL PROTECTED] Sent: Friday, December 19, 2003 9:40 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] use of Bp/Br duplexer as 2 channel combiner Has anyone ever used a Bandpass/reject duplexer as a transmit combiner. As an example, using one port set up as a pass on Frequency A, reject on frequency B, and the other port to reject frequency A and pass Frequency B? Any thoughts on this would be appreciated. Thanks, Dave N1OFJ 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 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] TPL website ??
http://www.tplcom.com/ Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Ken Arck [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 16, 2003 10:50 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TPL website ?? At 11:48 AM 12/16/2003 -0500, you wrote: Does anyone know if there is a web site for TPL amps ? Try http://www.spuriousunstablenevermakethepowerclaimed.com Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html Our new Repeater Audio Delay (RAD) board is now shipping! Compatible with many controllers! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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 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: crystal alignment (how accurate is accurate)
Not using the frame syncsusing the actual RF carrier! Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Rod Lane [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:55 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Used to be... In the good old days before frame syncs, you could wait until the local affiliate was in network programming and you had a REAL good 3.58 reference. Not so anymore. 3.579545 was an easy number to remember for some reason... ;^) 73 de N1FNE -Original Message- From: Gregg Lengling [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 11:07 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Another couple ways to calibrate: I use a GPS receiver with an 10 meg output to calibrate my service monitor. Before GPS just find out if you have a TV station that is using a Rubidium Standard for their frequency. Here in Milwaukee Ch4 uses one and we always used it to check calibration in the field, the standard was at 67.24 MHz, a lot better than using 10 megsmuch higher order of precision. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Re: crystal alignment (how accurate is accurate)
Another couple ways to calibrate: I use a GPS receiver with an 10 meg output to calibrate my service monitor. Before GPS just find out if you have a TV station that is using a Rubidium Standard for their frequency. Here in Milwaukee Ch4 uses one and we always used it to check calibration in the field, the standard was at 67.24 MHz, a lot better than using 10 megsmuch higher order of precision. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 10:04 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: crystal alignment (how accurate is accurate) Ian, you should have time standard frequencies in Australia on 5 10 and 15 MHz. If you have a secondary receiver, tune in the 10 MHz and compare it to the output of the 10 MHz timebase in your service monitor. This has been one of my obsessions for a while now, to find a way of more accurately setting my 10 MHz timebase in my service monitor. Zero beating with our WWV signal will only get you within a cycle or so. (i.e., one cycle off at 10 MHz equals 40 hertz error at 400 MHz) And then there's trying to find a time when the signal is strong and doesn't fade too much. Since I live about 50 miles south of Ft Collins you would think I would have a strong signal all the time, but no. So I figure there must be a way to use a scope to compare two audio signals (X/Y like we do with PL tones) and be able to set it more accurately. I have tried comparing the 1000 cycle audio tone from an external receiver when I generate a signal from the service monitor I kc off frequency from WWV. Then comparing that to the 1kc tone generated from the monitors own PL tone generator (phase locked to the 10 MHz time bases). You should be able to see a slow drift between the two on the oscilloscope but so far no success, too much noise to see much. Does someone have a way of getting closer than 1 cycle? (no I haven't bought a GPS timebase receiver yet but have drooled over them on Ebay. I've always wondered if a tuned RF receiver using 10 MHz crystals for IF filters would give you a strong 10 MHz carrier that could be used for calibration. Hopefully this is still somewhat on topic since we all need to set our repeaters on frequency. Art - KC7GF Golden, CO Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] crimp/crimp or clamp/solder?
Regarding connectors:...my company when I still owned it did a lot of business with the Federal Government and the Military. We were required to use crimp connectors, anything else was considered non-compliant. All outdoor connectors were required to be sealed with DB Vapor Lock or equivalent. While we also thought that Crimp was better, I researched why the GOV. required it. The biggest reason on the research project dedicated to the spec was : Repeatability. In other wordsalmost 100% of the crimps came out the same, while soldered/multipart connectors could not be reliably duplicated. There-in lies the rub: If you want all your connections to be the same, use Crimps and you'll be more reliable. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Eric Lemmon [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 02, 2003 8:08 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] crimp/crimp or clamp/solder? Dave, Crimped N connectors are NOT watertight, nor need they be. For that matter, clamp-type N connectors are not watertight, either. The manufacturers' catalog sheets may make that claim, but don't believe it. The value of crimped N connectors over clamped N connectors is that the former is much easier to install and, paradoxically, provides a better and more consistent connection. Popular thinking is that anything that takes longer to install and requires greater care, must always be better. The reality is that crimped connectors are almost universally used by commercial installers not because they are quicker to install, but because they are better. They are more resistant to pull-out, and the impedance is maintained better through the connector. Of course, not all crimp connectors are the same quality. You get what you pay for, and I am not one of those who spends any time at all searching for bargain connectors. As for watertightness, well, that's the result of the overwrap that all outdoor connectors should have. After ensuring that the connector is really tight, the splice should be overwrapped with a good self-vulcanizing rubber tape, such as 3M Scotch #130C or bi-seal tape. Start about two inches below the splice, and wrap upwards while overlapping about half of the turn below, to about two inches above the splice. Repeat with a second wrap, and then finish with a layer of plastic electrician's tape, such as 3M Scotch #33. When done properly, the connectors are fully protected against water intrusion. 73, Eric Lemmon WB6FLY [EMAIL PROTECTED] wrote: Eric, what about water ingress into those crimped type N connectors? Most I've seen don't look water tight. Do they have a gasket on the outer jacket like the clamp connectors? Dave __ Reply Separator _ Subject: Re: [Repeater-Builder] crimp/crimp or clamp/solder? Author: Repeater-Builder@yahoogroups.com at Internet_mail Date:12/1/2003 9:19 PM Sean, I have installed many hundreds of coaxial connectors over the past 40 years, and I have come to prefer crimp/crimp connectors for all critical work. Based on my own experience and the recommendations of several others who do similar work, I now use only connectors made by RF Industries. I have found that they are of consistently high quality, and they maintain impedance very well- a design goal of both N and BNC connectors. Although RFI does make a slightly cheaper line of N and BNC connectors that have nickel plating and Delrin dielectric, I tend to stick with the silver-plated connectors and Teflon dielectric. The center pins are always gold plated. The hex crimping tool costs about $100 in a kit with the dies needed for RG-142 and RG-214, and a commercial cable prep tool for stripping each layer of the cable will run another $75 or so. Many people will balk at having to spend the money to get the proper tools, but the end results are really worth it. I take great pride in my repeater installations, and you won't find any inter-series adapters used at all. It makes for a classy (OK, that's just my own opinion!) installation when all of the jumpers are exactly the right length, and have the correct mating connectors on each end. If the cable will not be moved once installed, RG-142/U cable is okay, but be aware that it has a solid steel center conductor that can (and often does) crack over time due to fatigue. RG-400/U cable is exactly the same in appearance and performance as RG-142/U, except that it has a stranded and silver-plated copper center conductor. For the record, I have no financial interest in RF Industries, Inc. 73, Eric Lemmon WB6FLY Sean KE6MOW wrote: I am interested in getting
RE: [Repeater-Builder] GE Stuff.....
Yep they were building radios until the late 70's when they got out of the business. They also made a lot of car phones using that as the basis of the unit. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Neil McKie [mailto:[EMAIL PROTECTED] Sent: Monday, December 01, 2003 4:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] GE Stuff. It could be ... that was what? 30 years ago? Neil Gregg Lengling wrote: Are you sure you mean Bendix and not Delco...because delco out of Oak Creek Wisconsin had one very similar. Of course at that time they were owned by General Motors...now they are separate and called Delphi. Gregg R. Lengling, W9DHI, Retired Administrator http://www.milwaukeehdtv.org K2/100 S#3075 KX1 S# 57 Politics is the art of appearing candid and completely open, while concealing as much as possible. -States: The Bene Gesserit View -Original Message- From: Neil McKie [mailto:[EMAIL PROTECTED] Sent: Monday, December 01, 2003 2:31 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] GE Stuff. Back in the late sixties, Bendix Radio ??, came out with a trunk mount radio. The receiver (I think) looked very similar to the Motorola Twin-V Line of the era. The transmitter looked like the GE Progress Line transmitter deck. Both the receiver and the transmitter used a cable to plug into the power supply almost exactly like GE did in the Pregress Line. Neil Paul Finch wrote: OK, Here goes. There is always going to be some similarities in radio equipment because of the current existing technology. Look at the similarity between the cell phones out today that are built by different companies, are they all stealing each other's designs? I don't think so! Read my response below. -Original Message- From: Kevin Custer [mailto:[EMAIL PROTECTED] Sent: Monday, December 01, 2003 1:10 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] GE Stuff. Paul Finch wrote: Kevin, Explain please! The only thing I see is the TCXO's that are even anywhere close. Similarities in Mobiles: Control Head. Response Motorola white and grey and squared corners, GE Beige and tan and rounded corners. Everybody had gone plastic at that time due to cost. Real close! PL (Channel Guard). Response This was an industry standard CTCSS, how can that be copied by GE? Every radio manufacture used this format, guess they all copied Motorola? Motorola called it Private Line, GE Channel Guard, RCA and Johnson something else. One other thing, if I am not mistaken this technology went back to the days of the old Motorola 80-D and GE Pre-Progress line of radios but they all put their own name on this technology. All used the EIA tone scheme ... only Motorola called each tone a specific designator. Ie: 1Z for 100.0 Hz; 1A for 103.5 Hz etc. RF Power Output Options (Like 110 watts). Response Again, industry standard, GE, Motorola, RCA, Aerotron and Kenwood all had and still have that power level, that is if they are still in business. As someone else pointed out a lot of this was driven by the industries like police and fire departments that were specifying the equipment. AF Power Output (10 watts) Response Big deal, this is the best level for use in noisy environments like large trucks! Channelized Crystal Elements. Response Like I said, this is the only real thing I can see that is similar but still not really the same circuit! 5 Pole HR in a casting that is not soldered to the PC board. Response This style of helical resonator is the best for selectivity, I think the noisy cities we live in drove this design. Johnson, RCA 1000 and other serious manufactures also used this number of helical resonators, did they copy Motorola? (RCA did copy the Master II and paid big time!) Dual Hysteresis Squelch. Response May have gotten the idea from Motorola but did not copy the circuit. Single Conversion Receiver, with 11 meg I-F frequency. Response GE's was 21.4 I believe and this was driven by cost as must as anything else, it's just cheaper and some people think it keeps down intermod. Same number of I-F poles. Response Physics, that's just what it takes to have the required selectivity. Stable RF/AF circuitry operates on 10 volts (9.6 on the Micor) Response GE's Master Pro ran their circuits on regulated 10 volts long before Micor came out! PA Protection (VSWR). Response Yeah, they copied Motorola's protection circuit that only caused more problems in the radio, I don't think GE had a SWR
