[Repeater-Builder] Re: Celwave 5042-1
Thanks for everyones help regarding this duplexer. By combining the information in each reply, can I assume I could have a good shot at tuning this duplexer to the bottom end of the 2m repeater bandplan if (1) The duplexer is factory tuned slightly below the 2m band (below the 145 split mentioned by one reply) and it there has been no attempt by anyone else to retune it? I'm assuming a lot, but if it's only a couple of megs off now, I'm thinking it may only need a minor tweeking rather than major adjusting of the coupling loops, etc. Does this sound reasonable also assuming I have the tuning instruction??...Thanks again.N5MZQ...Don --- In Repeater-Builder@yahoogroups.com, allan crites [EMAIL PROTECTED] wrote: Don, The manual I have for a Celwave 5042M-1-2-3 does not spec a power rating for use at less than 1.0 MHz of 200 W. It indicates the unit is tunable from 132 to 174 MHz with a band split at 145 MHz requiring different loop assemblies. Since there are 3 ranges I assume there are three different cable assemblies but nothing is indicated in the manual to confirm this. The individual cavities are shortened coaxial resonators with a pass dual notch coupling circuit mounted on a rotatable loop plate. Notch placement relative to the pass band frequency is accomplished with variable capacitors on the rotatable loop assemblies. Improper adjustment of the variable capacitors can and will easily destroy them. Persons not familiar with the tuning procedure have been known to rotate the caps too far and thus damage the loop assembly. What else would you like to know? 73 Allan Crites WA9ZZU Gary Schafer [EMAIL PROTECTED] wrote: I don't know that particular duplexer. The close spacing capability is not an indication that it is a band pass/band reject or a straight notch type unit. It could be either. The difference in the smaller mobile type or smaller rack mount type duplexers is usually in the insertion loss. The smaller the cavity the higher the insertion loss will be for a given set of operating parameters. It is usually not a problem getting enough rejection in the notch but it comes at the cost of higher insertion loss with the small cavities. The mobile type duplexers are usually notch only type and the other problem is that they usually have fixed capacitors in the internal loops that you can not change. So when you move them any great distance in frequency the insertion loss ends up even higher than the original spec because you can't change the loop capacitors. 73 Gary K4FMX -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- [EMAIL PROTECTED] On Behalf Of Don Spivey Sent: Monday, January 07, 2008 2:51 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Celwave 5042-1 Has anyone had any experience with a Celwave 5042-1 duplexer? I've very skeptical of any rackmount VHF duplexer although specs on the 6 can version (this one) shows it capable of 500kc spacing at 100 watts. I've seen several of these in recent months and mow I'm getting curious. I haven't located tuning instructions either, and some of the Celwave mobile duplexers can be a bear to tune, so I've heard. For that spacing I would assume this must be a band pass/band reject design too...73 Thanks...N5MZQDon Yahoo! Groups Links
RE: [Repeater-Builder] Scotchkoat
That's why you DON'T get it on your skin any longer. Have to tell you though, when I was growing up I raced slot cars and we had some sticky stuff we put on the tires to make them hold better on the track. The only thing we could find to clean the tires was MEK, I used to buy it by the gallon and I don’t have any problems, except the strange facial tic. ((GRIN) that means not really) Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kris Kirby Sent: Tuesday, January 08, 2008 1:13 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I don’t know. It depends on what it is, if it’s plastic based I would be very careful. If it’s a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] Scotchkoat
MEK will dissolve after sitting in it but it dries so fast it’s hard to keep wet and besides it’s supposed to be a carcinogen. Been there done that with the goo in the bottom of a bag, you learn real fast to clean the threads of the can and cap before putting the cap back on. If there is dried goo on the threads and the can gets turned over in your bag it softens the hard goo and it just flows out over time. I always clean any goo off of the threads with MEK before I put the lid back on, it then seals OK in any position. It’s a lot of fun on a dry windy day, makes great looking brown spider webs. Paul _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Daron J. Wilson Sent: Monday, January 07, 2008 9:40 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat Any one know of any solvents that can be used to remove it?? I have some on some tools and a spot on my car upholstery (I know, I know) I have little spots of that wonderful product on many things, the tops of my tower boots, a few tools, etc. One Klein canvas tower bag had bottle of it spill in the bottom making a wonderful collection of spare nuts and washers into a mass of goo. I suspect that any chemical strong enough to soften the product, will quite likely also dissolve or destroy the upholstery. I’ve not looked at the MSDS sheets for it, but the will likely be your best source for which type of solvent will work the best with it. Great stuff, wear gloves. HYPERLINK http://rover.ebay.com/rover/1/711-1751-2978-238/1?aid=10356774pid=2316294; REMEMBER - You can find it on ebaY No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM
RE: [Repeater-Builder] Scotchkoat
It's probably a lot harder to get M-E-K now than it was when we all grew up. Also, in that era before everything was found to cause cancer only in California, who cared about putting their hands in stuff or letting freon escape into the atmosphere. Acetone is probably weaker but easily available at most home improvement stores. If that fails, some 40-grit sand paper will do it, or just wait a week until the skin and goo falls off. Bob M. == --- Paul Finch [EMAIL PROTECTED] wrote: That's why you DON'T get it on your skin any longer. Have to tell you though, when I was growing up I raced slot cars and we had some sticky stuff we put on the tires to make them hold better on the track. The only thing we could find to clean the tires was MEK, I used to buy it by the gallon and I dont have any problems, except the strange facial tic. ((GRIN) that means not really) Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kris Kirby Sent: Tuesday, January 08, 2008 1:13 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I dont know. It depends on what it is, if its plastic based I would be very careful. If its a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
Re: [Repeater-Builder] Scotchkoat
I buy MEK at Ace is the Place Hardware here in Tucson. I used it a couple weeks ago to clean aluminum facia before painting. Someone mentioned that it evaporates too quickly, however, it as opposed to TCE (which we used very lavishly in the radar shop in the USAF back in the 60s. It's a wonder I ain't dead from that.), evaporates much more slowly. Just wear some painters gloves when you use it. One a side note, Oops is a pretty good product for removing stains. Have you tried that? de WD7F John in Tucson - Original Message - From: Bob M. [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, January 08, 2008 7:58 AM Subject: RE: [Repeater-Builder] Scotchkoat It's probably a lot harder to get M-E-K now than it was when we all grew up. Also, in that era before everything was found to cause cancer only in California, who cared about putting their hands in stuff or letting freon escape into the atmosphere. Acetone is probably weaker but easily available at most home improvement stores. If that fails, some 40-grit sand paper will do it, or just wait a week until the skin and goo falls off. Bob M. == --- Paul Finch [EMAIL PROTECTED] wrote: That's why you DON'T get it on your skin any longer. Have to tell you though, when I was growing up I raced slot cars and we had some sticky stuff we put on the tires to make them hold better on the track. The only thing we could find to clean the tires was MEK, I used to buy it by the gallon and I don’t have any problems, except the strange facial tic. ((GRIN) that means not really) Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kris Kirby Sent: Tuesday, January 08, 2008 1:13 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I don’t know. It depends on what it is, if it’s plastic based I would be very careful. If it’s a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] ScotchKote - db products, etc
Leaking antenna harnesses... Man, you guys are soft. I had to put a drip loop in my DB-406 cable. Otherwise I had to dry it out after every rainstorm. I had a glass bead type N barrel connector so the water would collect and short it. When the tx signal strength started to go down, it was time to drive to Santiago and let it drip for a couple of hours. Thankfully, it never rains in Southern California. (hammond, hazelwood 1972) Scotch Kote removal... A long time ago I was able to reconstitute a hardened can of this stuff by adding as much MEK as I could. But it took a very long time, like months to soften. Of course the built in brush bristles were left in the mess but they added to the bulk of the mix. Worked just as good as the original mix. Decibel products quality contol... Didn't their plant get moved to mexico when Andrew assimilated them? Since then I have noted serious quality control problems. Bad connector assembly, lousy mechanical tolerance control and photo copied network analyzer data. Its enough to drive me to Telewave. td wb6mie
RE: [Repeater-Builder] Scotchkoat
Jim, One thing, same thing about Radon gas. What happened to that, it was supposed to kill thousands. Someone made a killing off the test kits. Again duped by the news media. Some people get cancer from breathing. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jim Brown Sent: Tuesday, January 08, 2008 11:40 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat Take it seriously when they say something has been proved to cause cancer. I have a buddy who lost his leg to cancer and they traced it back to a solvent he used as a jet engine mechanic in the Air Force. He managed to live through it, but minus a leg. They proved beyond a doubt that it was the solvent that caused the cancer. Sorry I don't remember just which solvent it was - 73 - Jim W5ZIT --- Paul Finch [EMAIL PROTECTED] wrote: That's why you DON'T get it on your skin any longer. Have to tell you though, when I was growing up I raced slot cars and we had some sticky stuff we put on the tires to make them hold better on the track. The only thing we could find to clean the tires was MEK, I used to buy it by the gallon and I don’t have any problems, except the strange facial tic. ((GRIN) that means not really) Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kris Kirby Sent: Tuesday, January 08, 2008 1:13 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I don’t know. It depends on what it is, if it’s plastic based I would be very careful. If it’s a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links (Yahoo! ID required) mailto:[EMAIL PROTECTED] Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] Scotchkoat
Take it seriously when they say something has been proved to cause cancer. I have a buddy who lost his leg to cancer and they traced it back to a solvent he used as a jet engine mechanic in the Air Force. He managed to live through it, but minus a leg. They proved beyond a doubt that it was the solvent that caused the cancer. Sorry I don't remember just which solvent it was - 73 - Jim W5ZIT --- Paul Finch [EMAIL PROTECTED] wrote: That's why you DON'T get it on your skin any longer. Have to tell you though, when I was growing up I raced slot cars and we had some sticky stuff we put on the tires to make them hold better on the track. The only thing we could find to clean the tires was MEK, I used to buy it by the gallon and I dont have any problems, except the strange facial tic. ((GRIN) that means not really) Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kris Kirby Sent: Tuesday, January 08, 2008 1:13 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I dont know. It depends on what it is, if its plastic based I would be very careful. If its a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links (Yahoo! ID required) mailto:[EMAIL PROTECTED] Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
Re: [Repeater-Builder] Re: Off Topic (but with on topic questions): NTIA propaganda
LG will have a model 1st quarter this year with an MSRP (right now) of $50.00, and the scuttlebutt is that it will drop to $40 when it ships, making it free for those who have coupons. Keep an eye on CES this week, you will probably see it displayed there (Somewhere far away from the Laser TV mitsubishi is showing). Tom W9SRV Ron Wright, Skywarn Coodinator [EMAIL PROTECTED] wrote: hi all, Feb 29, 2009 is the date. Here in Tampa Bay, FL, area we have a number of independent and of course the regular affiliates. Ch 10 NTSC has ch 24 for HDTV, but near the 2009 date they will replace the Ch 10 with a NTSC/HDTV (quick mod for going to HDTV) and turn off the Ch 24. They spent over $1,000,000 on 24 and it will be turned off and I assume for sale to someone somewhere needing a 24 HDTV tx. The FCC required them to do this to keep Ch 10 license. The converter boxes will be needed by the 14% over the air NTSC TVs viewers. The gov is giving up to two $40/house hold coupons for the purchase. You can apply at www.dtv2009.gov for the coupons. They have link to sources for the converters, but as of now there are no listings. They predict the boxes will go for $50-70, but I have not seen any for less than $170. You will need a converter for each TV unless you watch the same on all of what you have. Most of the TV stations here do not have HDTV cameras and other studio equipment. One does and brags about its remotes are HDTV equipped. For us who have cable and sat we will not be affected at least for now. 73, ron, n9ee/r --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: At 1/6/2008 09:10, you wrote: Broadcasters are really wanting this mess to be over. My former station, KVOA is spending more than twice as much on elect, cooling etc running two transmitters. One on 4 and one on 23. The stations all want to stop the bleeding of money. I thought that the broadcasters would actually fight this, as there will definitely be a reduction in OTA viewership (hence ratings, hence advert. $$$) the second the analogs are switched off. I own 5 non-DTV TVs (not including an old Watchman), since satellite TV is unaffected I will probably forget the mostly useless OTA programming (I don't/won't pay for locals via the dish) continue to watch std. def. TV via the dishes. Bob NO6B Yahoo! Groups Links - Never miss a thing. Make Yahoo your homepage.
[Repeater-Builder] Re: Off Topic (but with on topic questions): NTIA propaganda
hi all, Feb 29, 2009 is the date. Here in Tampa Bay, FL, area we have a number of independent and of course the regular affiliates. Ch 10 NTSC has ch 24 for HDTV, but near the 2009 date they will replace the Ch 10 with a NTSC/HDTV (quick mod for going to HDTV) and turn off the Ch 24. They spent over $1,000,000 on 24 and it will be turned off and I assume for sale to someone somewhere needing a 24 HDTV tx. The FCC required them to do this to keep Ch 10 license. The converter boxes will be needed by the 14% over the air NTSC TVs viewers. The gov is giving up to two $40/house hold coupons for the purchase. You can apply at www.dtv2009.gov for the coupons. They have link to sources for the converters, but as of now there are no listings. They predict the boxes will go for $50-70, but I have not seen any for less than $170. You will need a converter for each TV unless you watch the same on all of what you have. Most of the TV stations here do not have HDTV cameras and other studio equipment. One does and brags about its remotes are HDTV equipped. For us who have cable and sat we will not be affected at least for now. 73, ron, n9ee/r --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: At 1/6/2008 09:10, you wrote: Broadcasters are really wanting this mess to be over. My former station, KVOA is spending more than twice as much on elect, cooling etc running two transmitters. One on 4 and one on 23. The stations all want to stop the bleeding of money. I thought that the broadcasters would actually fight this, as there will definitely be a reduction in OTA viewership (hence ratings, hence advert. $$$) the second the analogs are switched off. I own 5 non-DTV TVs (not including an old Watchman), since satellite TV is unaffected I will probably forget the mostly useless OTA programming (I don't/won't pay for locals via the dish) continue to watch std. def. TV via the dishes. Bob NO6B
Re: [Repeater-Builder] ScotchkoatR
Radon *is* very dangerous if you smoke. It gets stuck in the tar that its smoker's lungs, being radioactive... I know about the philosophy of being scared of everything, however. But that doesn't obviate the real dangers of a lot of chemicals, substances that a lot of is techie oriented people used earlier in our lives. So while MEK is cool, I use it with great caution and protection. --STeve Andre' wb8wsf en82 On Tuesday 08 January 2008 12:46:38 Paul Finch wrote: Jim, One thing, same thing about Radon gas. What happened to that, it was supposed to kill thousands. Someone made a killing off the test kits. Again duped by the news media. Some people get cancer from breathing. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jim Brown Sent: Tuesday, January 08, 2008 11:40 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat Take it seriously when they say something has been proved to cause cancer. I have a buddy who lost his leg to cancer and they traced it back to a solvent he used as a jet engine mechanic in the Air Force. He managed to live through it, but minus a leg. They proved beyond a doubt that it was the solvent that caused the cancer. Sorry I don't remember just which solvent it was - 73 - Jim W5ZIT Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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: Celwave 5042-1
Don, The Celwave 5042M and the 5042-1 are the same duplexer which was manufactured by Celwave in Phoenix AZ for Motorola. The 5042M was supplied to Motorola with the Motorola part no. 01 V 85417xxx for use in Motorola base stations. They were supplied tested and tuned to a stock freq. from Celwave and were re-tuned by Motorola contract employees to the freq. required in the base stations at the Motorola factory. The 5042-1 Celwave duplexers referenced by Eric Lemmon were sold under the RDD4900A Motorola Parts Dept.no. having a revised spec. negotiated by Bryan Corley of Motorola with Celwave for the 500 KHz spacing, higher insertion loss, and the higher power. The 5042 duplexers, while able to be used over a freq. range of 132 to 174 MHz, had 6 different loop assemblies depending if the unit was for low pass-high notch or high pass-low notch, and 3 different cable assemblies required to operate in this range. The Motorola parts dept. would take an order from a customer for a duplexer, sent the operating freq's, and other parameters to Celwave, who tuned the duplexer and drop shipped the unit to the customer direct. As Celwave's OEM Support Manager to Motorola in Schaumburg in the 1990's, I had occasion to observe the Celwave factory personnel tune these duplexers when I was at the Celwave factory in Phoenix. I then later myself tuned, trained instructed Motorola factory personnel of the methods necessary to tune the 5042 duplexers, who after destroying many loop assemblies, were able to do the alignment properly. Unfortunately for Motorola the personnel changed around regularly and retraining was an ongoing process because of the loop assembly destruction. Alignment tuning of the duplexer requires the cable harness to be removed and each cavity be tuned separately, the harness then is reassembled to the cavities and optimization of the input and output of both legs may be needed to get the best return loss. I caution you that this comprehensive realignment needs to be performed even tho you are moving only a MHz away from the original tuning. A network analyzer or such similar test equipment is mandatory if the optimum benefits of the duplexer is to be realized. I suggest you obtain the 5042-1 instruction manual from Celwave ( now known as Radio Frequency Systems ) in Connecticut.The manual I have is 44 pages and not for the 5042-1. 73 Allan Crites WA9ZZU Don Spivey [EMAIL PROTECTED] wrote: Thanks for everyones help regarding this duplexer. By combining the information in each reply, can I assume I could have a good shot at tuning this duplexer to the bottom end of the 2m repeater bandplan if (1) The duplexer is factory tuned slightly below the 2m band (below the 145 split mentioned by one reply) and it there has been no attempt by anyone else to retune it? I'm assuming a lot, but if it's only a couple of megs off now, I'm thinking it may only need a minor tweeking rather than major adjusting of the coupling loops, etc. Does this sound reasonable also assuming I have the tuning instruction??...Thanks again.N5MZQ...Don --- In Repeater-Builder@yahoogroups.com, allan crites [EMAIL PROTECTED] wrote: Don, The manual I have for a Celwave 5042M-1-2-3 does not spec a power rating for use at less than 1.0 MHz of 200 W. It indicates the unit is tunable from 132 to 174 MHz with a band split at 145 MHz requiring different loop assemblies. Since there are 3 ranges I assume there are three different cable assemblies but nothing is indicated in the manual to confirm this. The individual cavities are shortened coaxial resonators with a pass dual notch coupling circuit mounted on a rotatable loop plate. Notch placement relative to the pass band frequency is accomplished with variable capacitors on the rotatable loop assemblies. Improper adjustment of the variable capacitors can and will easily destroy them. Persons not familiar with the tuning procedure have been known to rotate the caps too far and thus damage the loop assembly. What else would you like to know? 73 Allan Crites WA9ZZU Gary Schafer [EMAIL PROTECTED] wrote: I don't know that particular duplexer. The close spacing capability is not an indication that it is a band pass/band reject or a straight notch type unit. It could be either. The difference in the smaller mobile type or smaller rack mount type duplexers is usually in the insertion loss. The smaller the cavity the higher the insertion loss will be for a given set of operating parameters. It is usually not a problem getting enough rejection in the notch but it comes at the cost of higher insertion loss with the small cavities. The mobile type duplexers are usually notch only type and the other problem is that they usually have fixed capacitors in the internal loops that you can not change. So when you move them any great distance in frequency the
RE: [Repeater-Builder] Scotchkoat
More than likely the solvent in question was carbontetrachloride. That's what was used prior to my AF time (starting in 1981), when we used PD-680. We also had trichlorethaline and MEK. Regardless of the solvent in question, if you like your liver (and other various parts), you'll wear the appropriate protective gear, avoid the fumes and use it properly. Nasty, nasty stuff. all of them. de WM4B Mike Kathleen, GA From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jim Brown Sent: Tuesday, January 08, 2008 12:40 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat Take it seriously when they say something has been proved to cause cancer. I have a buddy who lost his leg to cancer and they traced it back to a solvent he used as a jet engine mechanic in the Air Force. He managed to live through it, but minus a leg. They proved beyond a doubt that it was the solvent that caused the cancer. Sorry I don't remember just which solvent it was - 73 - Jim W5ZIT --- Paul Finch [EMAIL PROTECTED] mailto:dpaulfinch%40ntbb.net wrote: That's why you DON'T get it on your skin any longer. Have to tell you though, when I was growing up I raced slot cars and we had some sticky stuff we put on the tires to make them hold better on the track. The only thing we could find to clean the tires was MEK, I used to buy it by the gallon and I don't have any problems, except the strange facial tic. ((GRIN) that means not really) Paul -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Kris Kirby Sent: Tuesday, January 08, 2008 1:13 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: RE: [Repeater-Builder] Scotchkoat On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I don't know. It depends on what it is, if it's plastic based I would be very careful. If it's a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] mailto:kris%40catonic.us But remember, with no superpowers comes no responsibility. --rly Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links (Yahoo! ID required) mailto:[EMAIL PROTECTED] mailto:Repeater-Builder-fullfeatured%40yahoogroups.com __ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping image001.jpgimage002.jpg
[Repeater-Builder] 220 mhz Securicor PA
I am very happy today. Finally found out how to make these amps work. These are Securicor ACSB amps that were made by E.F. Johnson. EFJ model number is 023-1220-045. I have been looking for the info on these for a couple of years with no luck. Finally found it at the KE3JP / R webpage, a BIG thank you to them. Put + 5 v. on pin 8 of the DB9, drive with about 20 mw, and I get appx 120 watts out. Posting this in case anyone else has been looking for the info like I have.
[Repeater-Builder] New file uploaded to Repeater-Builder
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Repeater-Builder group. File: /GE Exec repeater mod document/GE Exec II Repeater ConvRev.doc Uploaded by : k1ike [EMAIL PROTECTED] Description : GE Exec mobile to repeater modification You can access this file at the URL: http://groups.yahoo.com/group/Repeater-Builder/files/GE%20Exec%20repeater%20mod%20document/GE%20Exec%20II%20Repeater%20ConvRev.doc To learn more about file sharing for your group, please visit: http://help.yahoo.com/l/us/yahoo/groups/original/members/web/index.htmlfiles Regards, k1ike [EMAIL PROTECTED]
[Repeater-Builder] Tower Installation labor rate?
Guy's, anyone know what the current hourly wage that tower maintenance types charge? 73 de Jack - N7OO
Re: [Repeater-Builder] Scotchkoat
Paul Finch wrote: Jim, One thing, same thing about Radon gas. What happened to that, it was supposed to kill thousands. Someone made a killing off the test kits. Again duped by the news media. Not really -- much of the old construction housing built before anyone tested for radon typically has a lot of leaks that mix the air pretty well in basements, with unintentional fresh air. New construction in areas with high radon levels typically has radon mitigation built in (air space under the foundation and a low speed circulation fan, a pipe out the roof, and an airflow monitor, usually installed in a garage or basement somewhere where the homeowner can check on the circulation fan's operation. I know of hundreds of houses in one area here that have these, as part of their original construction. The dangerous thing to do with radon is to seal up the basement of an older house in a high-radon area. (We have a lot of them here in Colorado). Many people do this to save on heating costs/etc, and raise their risk dramatically. It's an unintended consequence of sealing up the house real well for the winter and not moving air around in basements and other areas where radon gas will naturally collect if allowed to. It doesn't take much air movement to keep levels low. Nate WY0X
RE: [Repeater-Builder] Tower Installation labor rate?
Hello Group! If you are referring to personnel that do antenna/hard-line type install and maintenance on towers, I have recently dealt with two different companies in the Dallas, Texas area that did some work on a 130 foot water tower. One company charged $95.00 and the other charged $125.00 per person, per hour, for what they accomplished on this height/kind of tower. '73 Charlie It is not the class of license the Amateur holds, but the class of the Amateur that holds the license. Charles Mumphrey Amateur Radio Station Kc5ozh Repeater System: Rowlett Main: 441.325 MHz + 162.2 Dallas: 441.950 MHz + 162.2 Rowlett II: 441.950 MHz + 110.9 Rowlett R.A.C.E.S. Unit 823 http://www.CharliesElectronics.com Original Message Subject: [Repeater-Builder] Tower Installation labor rate? From: Jack Taylor [EMAIL PROTECTED] Date: Tue, January 08, 2008 7:08 pm To: Repeater-Builder@yahoogroups.com Guy's, anyone know what the current hourly wage that tower maintenance types charge? 73 de Jack - N7OO
[Repeater-Builder] Micor Compa-Station Mods
I have a read over the mods in; http://www.repeater-builder.com/rbtip/stationmod.html and also; http://www.repeater-builder.com/rbtip/micor-index.html#ANY-Station Have had done; http://www.repeater-builder.com/rbtip/stationcontrol.html This is a UHF machine on 444.600/449.600. I will be using a Arcom RC210, but want to be able to use the stock controller on the station in a crunch. I will also be using the stock pl boards on the station. What other mods need to be done taking in consideration for using the above setup. Would love to have the best setup possible since I will ultimately have limited access to this machine when in place. Thanks, Robert
Re: [Repeater-Builder] Tower Installation labor rate?
I just got a quote today for $1360.00 to climb a monopole. This is $85.00 per hour for an 8 hour day for two climbers. The tower crew is a 2.5 hour drive away and they would charge us for the full day as we would kill the day for them. If they were in the area (which they often are) and are doing work for another client, they would charge us for one way travel and the other client for one way travel plus the hourly rate for the work done. It does not seem to make a difference to them as to how high they have to climb. The same rate for an elevator ride to 2000 feet as a climb to 150 feet. 73 Glenn WB4UIV At 08:08 PM 01/08/08, you wrote: Guy's, anyone know what the current hourly wage that tower maintenance types charge? 73 de Jack - N7OO
RE: [Repeater-Builder] Micor Compa-Station Mods
Speaking of Motorola Compa-Stations, I ran across an old A strip (tube type) Low Band 47 MHz Compa-Station today, it's for sale if anyone is interested. I bet you could by it for 25 bucks! LAUGH Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of georgiaskywarn Sent: Tuesday, January 08, 2008 8:53 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Micor Compa-Station Mods I have a read over the mods in; http://www.repeater-builder.com/rbtip/stationmod.html and also; http://www.repeater-builder.com/rbtip/micor-index.html#ANY-Station Have had done; http://www.repeater-builder.com/rbtip/stationcontrol.html This is a UHF machine on 444.600/449.600. I will be using a Arcom RC210, but want to be able to use the stock controller on the station in a crunch. I will also be using the stock pl boards on the station. What other mods need to be done taking in consideration for using the above setup. Would love to have the best setup possible since I will ultimately have limited access to this machine when in place. Thanks, Robert Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1213 - Release Date: 1/7/2008 9:14 AM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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 Installation labor rate?
Guy's, anyone know what the current hourly wage that tower maintenance types charge? 73 de Jack - N7OO Like everything else, it varies a whole lot. For a well-equipped and competent crew, figure $75 to $125 an hour depending on what area you're in. Usually that rate is only good for 8 to 10 hours max per day, with overtime/nights/weekends extra. A good crew will usually want three men minimum: two in the air, one on the ground, unless there is no ground work involved such as an inspection, inventory, antenna jumper replacement, etc.. Travel time is typically at half rate for a single truck, full rate for two trucks, but that tends to vary a lot (some charge mileage plus time). Usually there's a minimum too, sometimes half a day, sometimes a full day. If a drum winch is needed, there will usually be an additional equipment charge and usually another guy to run the winch (i.e. 4 men minimum). If the site requires union labor or, alternatively, if non-union work has to be done at union rate, adjust accordingly. Sweeps and documentation may be extra. Also be wary of guys that work for a reputable company but offer to do the work on the side as a favor to you as a ham. The company's insurance isn't going to cover them if they're off doing side work. If you find a deal that's too good to be true, it probably is. Unless the crew is really desperate for work, which these days rarely seems to be the case, chances are they're either under-equipped, ill-trained, or otherwise not qualified to do the job right which not only results in shoddy work but can also be a big liability risk to boot. --- Jeff WN3A
[Repeater-Builder] Re: Phelps Dodge Duplexer
Wondering if any one every found a manual for this deplexer?? Please let me know, email me at [EMAIL PROTECTED] Thanks Brad N3NRN --- In Repeater-Builder@yahoogroups.com, n3nrn [EMAIL PROTECTED] wrote: I'm looking for a manual for a Phelps Dodge 440 Duplexer Cat# 522- 509. , Does any one have a electronic copy they can email me??? Please let me know Thanks Brad N3NRN
[Repeater-Builder] Genesis series questions
Two questions for everyone. First off, I am trying to mod my MVA (Convertacom) to handle NiMH batteries. I have looked at the repeater-builder website and found the schematic. I opened up my MVA and there is no silk screening on the board to identify the components. I began to attempt to trace the circuit but that might take eons. So, does anyone have a picture or can tell me where R45 is located so that I might change it to the appropriate value? Actually if I could just identify which IC is labeled as U4 that would work too. I can surely find pin 9 from there. Secondly, I have run into a programming problem. I have HT600's, P200's and a newly acquired MT1000. Went to try and program the MT1000 on my 286 and received Serial Bus Access Error 003 on the screen when trying to read the radio. I checked batteries, cables, and the like and no change. I then tried to read one of my other radios that I had programed before and received the same error. So then I tried my 386 computer. Same error. I then tried a different RIB. Same error. Anyone have any ideas?
[Repeater-Builder] Motorola Portable project
Does anyone know where I can find the COR or COS point for a Motorola P110 or GP300. I am working on a portable repeater and would like to use a typical controller with COS circuit and not just audio. I am familiar with the portables but as far as reading a schematic and finding that plot on the radio itself, I am at a loss. Thanks in advance. N1ROA
Re: [Repeater-Builder] Tower Installation labor rate?
On Tue, 8 Jan 2008, Glenn Little WB4UIV wrote: It does not seem to make a difference to them as to how high they have to climb. The same rate for an elevator ride to 2000 feet as a climb to 150 feet. In that case, feedline costs and tower rent dictate where the antenna sits at. -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly
[Repeater-Builder] Re: Scotchkoat
Always wear gloves and have lots of ventilation when working with MEK. Amazing stuff but very nasty. Tim KB2MFS Re: Scotchkoat Posted by: Daron J. Wilson [EMAIL PROTECTED] daronwilson Mon Jan 7, 2008 7:39 pm (PST) Any one know of any solvents that can be used to remove it?? I have some on some tools and a spot on my car upholstery (I know, I know) I have little spots of that wonderful product on many things, the tops of my tower boots, a few tools, etc. One Klein canvas tower bag had bottle of it spill in the bottom making a wonderful collection of spare nuts and washers into a mass of goo. I suspect that any chemical strong enough to soften the product, will quite likely also dissolve or destroy the upholstery. I've not looked at the MSDS sheets for it, but the will likely be your best source for which type of solvent will work the best with it. Great stuff, wear gloves. Back to top Reply to sender | Reply to group | Reply via web post Messages in this topic (12) 3d. Re: Scotchkoat Posted by: Kris Kirby [EMAIL PROTECTED] ke4ahr Mon Jan 7, 2008 11:12 pm (PST) On Mon, 7 Jan 2008, Paul Finch wrote: Unless it has something like lacquer thinner in it there is not a chance of it working. On upholstery I don't know. It depends on what it is, if it's plastic based I would be very careful. If it's a cloth material I would try the lacquer thinner then the MEK. MEK also dries very fast. Needless to say, try it on a hidden piece if upholstery first. Isn't MEK carcinogenic in 52 states and France? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly Back to top Reply to sender | Reply to group | Reply via web post Messages in this topic (12) 4a. Re: Scotchkote Posted by: Eric Lemmon [EMAIL PROTECTED] wb6fly Mon Jan 7, 2008 7:26 pm (PST) Scott, I think you mean 3M Scotchkote. I'd try using Methyl Ethyl Ketone (MEK), Acetone, or Xylene. These are all very aggressive solvents, so care must be used in their use. Once Scotchkote dries, it may be difficult to remove. Chemical-resistant gloves should be worn. 73, Eric Lemmon WB6FLY
Re: [Repeater-Builder] Re: Scotchkoat
On Tue, 8 Jan 2008, Tim and Janet wrote: Always wear gloves and have lots of ventilation when working with MEK. Amazing stuff but very nasty. My experience was that anywhere it was spilled came back cleaner than what it was before. It even removed the color from the ESD matts. -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly
RE: [Repeater-Builder] Re: Phelps Dodge Duplexer
This is my fault. I promised I would scan the documents and I have not done it. It is on my agenda, an I promise I will do it tomorrow morning before noon - California time. I'm a bad bad boy! Bill - W6CBS _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of n3nrn Sent: Tuesday, January 08, 2008 7:17 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Phelps Dodge Duplexer Wondering if any one every found a manual for this deplexer?? Please let me know, email me at [EMAIL PROTECTED] mailto:n3nrn%40arrl.net Thanks Brad N3NRN --- In Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com, n3nrn [EMAIL PROTECTED] wrote: I'm looking for a manual for a Phelps Dodge 440 Duplexer Cat# 522- 509. , Does any one have a electronic copy they can email me??? Please let me know Thanks Brad N3NRN BEGIN:VCARD VERSION:2.1 N:Hudson;Bill FN:Bill Hudson ORG:Hudson Sports Productions TITLE:Broadcast Engineer TEL;WORK;VOICE:(650) 595-5566 TEL;HOME;VOICE:(650) 595-5566 TEL;CELL;VOICE:(650) 576-5656 TEL;WORK;FAX:(650) 591-8859 TEL;PREF:1-650-595-5566 ADR;WORK:;650-576-5656 LABEL;WORK:650-576-5656 ADR;HOME:;;82 Cedar St;San Carlos;California;94070;United States of America LABEL;HOME;ENCODING=QUOTED-PRINTABLE:82 Cedar St=0D=0ASan Carlos, California 94070=0D=0AUnited States of America BDAY:20070330 EMAIL;PREF;INTERNET:[EMAIL PROTECTED] REV:20070816T214519Z END:VCARD
[Repeater-Builder] Re: Motorola Portable project
David [EMAIL PROTECTED] wrote: Does anyone know where I can find the COR or COS point for a Motorola P110 or GP300. There is no COS point per se in the GP300/P110, but the speaker output goes to about 3.5 volts DC when the receiver un squelches. We call that RUS.
