Re: [Repeater-Builder] Radio or Duplex watts
A Duplexer has no wattage as it is neither a Transmiter nor Reciever i am trying to understand your 35 watts point Marcus On Wed, May 26, 2010 at 6:00 PM, kf7eec michaelh...@gmail.com wrote: If I would to use 2 HT radios that are 4 watts each and a duplexer that is 35 watts to build a portable repeater, would my repeater be 4 watts or 35 watts? Thanks! Michael KF7EEC
Re: [Repeater-Builder] Radio or Duplex watts
Actually a duplexer does have a wattage - it has a power LIMIT. The small chinese duplexers use a tiny, low voltage capacitor inside each stage and the have a limit of 35-40 watts. I have a small duplexer here that has a limit of 50 watts and a large rack mount unit that has a limit of several hundred watts. Things aren't pretty when a duplexer arcs over internally. You have half a chance of repairing the ones that are bolted together. The ones that are welded together make halfway decent doorstops. Mike At 11:24 PM 05/26/10, you wrote: A Duplexer has no wattage as it is neither a Transmiter nor Reciever i am trying to understand your 35 watts point Marcus On Wed, May 26, 2010 at 6:00 PM, kf7eec mailto:michaelh...@gmail.commichaelh...@gmail.com wrote: If I would to use 2 HT radios that are 4 watts each and a duplexer that is 35 watts to build a portable repeater, would my repeater be 4 watts or 35 watts? Thanks! Michael KF7EEC
[Repeater-Builder] Fwd: DB4379UHF combiner
To the group, I received the attached e-mail from a friend in the two way business. Does anyone know if his goal can be met as he describes below? Also could someone point me to the tuning instructions for this beast. Thank you, Ted W3VG Original Message Subject:DB4379UHF combiner Date: Thu, 20 May 2010 11:16:13 -0400 From: Robert Harvey freedom...@windstream.net To: Ted Leonard n2...@verizon.net Ted, you're the filter guy. I have a DB products DB4379-4404B 4 channel UHF combiner. You did a little bit of tuning on it once in the shop. Do you know, or can you find out, if it can be turned into two, 2 channel combiners? I want to combine 461.625, 461.650, 463.625 463.650 but the combiner is speced at 50KHz spacing. There are two splits of only 25KHz on the frequencies I need to work with. Combining 461.625 and 463.625 on one combiner and antenna and combine 461.650 and 463.650 on another combiner and antenna would save me antennas and feedline and lots of money if I can modify the combiner I own. Bob Robert D. Harvey Freedom Communications, Inc aka: RDH / TransCom voice (716) 664-2659 fax (716) 483-5968 email freedom...@windstream.net No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2885 - Release Date: 05/20/10 02:26:00
[Repeater-Builder] Re: Fwd: DB4379UHF combiner
Ted Leonard n2...@... wrote: To the group, I received the attached e-mail from a friend in the two way business. Does anyone know if his goal can be met as he describes below? Also could someone point me to the tuning instructions for this beast. Thank you, Ted W3VG It can be done, although slightly different that what your first impression of the required hardware would be. You would also need two hybrid combiners and possibly some additional filtering with the DB unit. s. Original Message Subject: DB4379UHF combiner Date: Thu, 20 May 2010 11:16:13 -0400 From: Robert Harvey freedom...@... To: Ted Leonard n2...@... Ted, you're the filter guy. I have a DB products DB4379-4404B 4 channel UHF combiner. You did a little bit of tuning on it once in the shop. Do you know, or can you find out, if it can be turned into two, 2 channel combiners? I want to combine 461.625, 461.650, 463.625 463.650 but the combiner is speced at 50KHz spacing. There are two splits of only 25KHz on the frequencies I need to work with. Combining 461.625 and 463.625 on one combiner and antenna and combine 461.650 and 463.650 on another combiner and antenna would save me antennas and feedline and lots of money if I can modify the combiner I own. Bob Robert D. Harvey Freedom Communications, Inc aka: RDH / TransCom voice (716) 664-2659 fax (716) 483-5968 email freedom...@... No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2885 - Release Date: 05/20/10 02:26:00
Re: [Repeater-Builder] Fwd: DB4379UHF combiner
If you wanted to go with 2 2ch combiners instead of 1, you can put 451.525 and 453.525 on one and 451.550 and 453.550 on another if your worried about desence and such. But you would want to get a hybrid coupler, 2 inputs, 1 output and 1 port for dummyload. On Thu, May 27, 2010 at 11:32 AM, Ted Leonard n2...@verizon.net wrote: To the group, I received the attached e-mail from a friend in the two way business. Does anyone know if his goal can be met as he describes below? Also could someone point me to the tuning instructions for this beast. Thank you, Ted W3VG Original Message Subject: DB4379UHF combiner Date: Thu, 20 May 2010 11:16:13 -0400 From: Robert Harvey freedom...@windstream.net freedom...@windstream.net To: Ted Leonard n2...@verizon.net n2...@verizon.net Ted, you're the filter guy. I have a DB products DB4379-4404B 4 channel UHF combiner. You did a little bit of tuning on it once in the shop. Do you know, or can you find out, if it can be turned into two, 2 channel combiners? I want to combine 461.625, 461.650, 463.625 463.650 but the combiner is speced at 50KHz spacing. There are two splits of only 25KHz on the frequencies I need to work with. Combining 461.625 and 463.625 on one combiner and antenna and combine 461.650 and 463.650 on another combiner and antenna would save me antennas and feedline and lots of money if I can modify the combiner I own. Bob Robert D. Harvey Freedom Communications, Inc aka: RDH / TransCom voice (716) 664-2659 fax (716) 483-5968 email freedom...@windstream.net
[Repeater-Builder] 220 duplexers
Does anyone have a set of 220 duplexers that they want to get rid of? We had one of our 220 antennas go bad and don't want to change it. Thanks Stan
Re: [Repeater-Builder] 220 duplexers
Say what? In a message dated 5/27/2010 12:09:47 P.M. Pacific Daylight Time, wa2...@taconic.net writes: Does anyone have a set of 220 duplexers that they want to get rid of? We had one of our 220 antennas go bad and don't want to change it. Thanks Stan
RE: [Repeater-Builder] Fwd: DB4379UHF combiner
If he can disconnect the output of the cans from the antenna adaptor then he can split it into two separate 2 channel units. He might have to remount two of the cans in a separate chassis to eliminate any mutual coupling as necessary. Wayne Cornick IE Communications Inc. 21 West Front Street P.O. Box 67 Trenton, IL. 62293 618.224.7138 Phone 618.224.9006 FAX wa...@iecomm.com -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ted Leonard Sent: Thursday, May 27, 2010 1:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Fwd: DB4379UHF combiner To the group, I received the attached e-mail from a friend in the two way business. Does anyone know if his goal can be met as he describes below? Also could someone point me to the tuning instructions for this beast. Thank you, Ted W3VG Original Message Subject: DB4379UHF combiner Date: Thu, 20 May 2010 11:16:13 -0400 From: Robert Harvey mailto:freedom...@windstream.net freedom...@windstream.net To: Ted Leonard mailto:n2...@verizon.net n2...@verizon.net Ted, you're the filter guy. I have a DB products DB4379-4404B 4 channel UHF combiner. You did a little bit of tuning on it once in the shop. Do you know, or can you find out, if it can be turned into two, 2 channel combiners? I want to combine 461.625, 461.650, 463.625 463.650 but the combiner is speced at 50KHz spacing. There are two splits of only 25KHz on the frequencies I need to work with. Combining 461.625 and 463.625 on one combiner and antenna and combine 461.650 and 463.650 on another combiner and antenna would save me antennas and feedline and lots of money if I can modify the combiner I own. Bob Robert D. Harvey Freedom Communications, Inc aka: RDH / TransCom voice (716) 664-2659 fax (716) 483-5968 email freedom...@windstre mailto:freedom...@windstream.net am.net No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2899 - Release Date: 05/27/10 01:25:00
Re: [Repeater-Builder] 220 duplexers
Duplexers for a 220 repeater! From: cruising7...@aol.com Sent: Thursday, May 27, 2010 3:27 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 220 duplexers Say what? In a message dated 5/27/2010 12:09:47 P.M. Pacific Daylight Time, wa2...@taconic.net writes: Does anyone have a set of 220 duplexers that they want to get rid of? We had one of our 220 antennas go bad and don't want to change it. Thanks Stan
Re: [Repeater-Builder] 220 duplexers
He was running split antennas and is wanting a duplexer so he can use the remaining one that's good. (I read between the lines.) Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531 cruising7...@aol.com wrote: Say what? In a message dated 5/27/2010 12:09:47 P.M. Pacific Daylight Time, wa2...@taconic.net writes: Does anyone have a set of 220 duplexers that they want to get rid of? We had one of our 220 antennas go bad and don't want to change it. Thanks Stan
Re: [Repeater-Builder] 220 duplexers
Thanks Scott, I did not realize my question was so vague. Sorry... Stan From: Scott Zimmerman Sent: Thursday, May 27, 2010 4:04 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 220 duplexers He was running split antennas and is wanting a duplexer so he can use the remaining one that's good. (I read between the lines.) Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531 cruising7...@aol.com wrote: Say what? In a message dated 5/27/2010 12:09:47 P.M. Pacific Daylight Time, wa2...@taconic.net writes: Does anyone have a set of 220 duplexers that they want to get rid of? We had one of our 220 antennas go bad and don't want to change it. Thanks Stan
Re: [Repeater-Builder] 220 duplexers
Scott LOL! I'm gonna check my glasses prescription. FWIW, I had a similar issue with a split antenna rptr many years ago and resolved it by swapping antennas. The complaining stick was on the xmtr side. When it was just dealing with signal levels, it was as quiet as a church mouse. It was a temporary fix and I doubted it would last very long but surprisingly it outlasted the repeater itself. Bruce In a message dated 5/27/2010 1:04:52 P.M. Pacific Daylight Time, n3...@repeater-builder.com writes: He was running split antennas and is wanting a duplexer so he can use the remaining one that's good. (I read between the lines.) Scott
RE: [Repeater-Builder] Fwd: DB4379UHF combiner
You might try finding a spec for a similar maybe same model 2ch combiner. Then see if your isolator cabling system is the same. Ross -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ted Leonard Sent: Thursday, May 27, 2010 11:33 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Fwd: DB4379UHF combiner To the group, I received the attached e-mail from a friend in the two way business. Does anyone know if his goal can be met as he describes below? Also could someone point me to the tuning instructions for this beast. Thank you, Ted W3VG Original Message Subject: DB4379UHF combiner Date: Thu, 20 May 2010 11:16:13 -0400 From: Robert Harvey mailto:freedom...@windstream.net freedom...@windstream.net To: Ted Leonard mailto:n2...@verizon.net n2...@verizon.net Ted, you're the filter guy. I have a DB products DB4379-4404B 4 channel UHF combiner. You did a little bit of tuning on it once in the shop. Do you know, or can you find out, if it can be turned into two, 2 channel combiners? I want to combine 461.625, 461.650, 463.625 463.650 but the combiner is speced at 50KHz spacing. There are two splits of only 25KHz on the frequencies I need to work with. Combining 461.625 and 463.625 on one combiner and antenna and combine 461.650 and 463.650 on another combiner and antenna would save me antennas and feedline and lots of money if I can modify the combiner I own. Bob Robert D. Harvey Freedom Communications, Inc aka: RDH / TransCom voice (716) 664-2659 fax (716) 483-5968 email freedom...@windstre mailto:freedom...@windstream.net am.net
Re: [Repeater-Builder] 220 duplexers
At 5/27/2010 14:16, you wrote: Scott LOL! I'm gonna check my glasses prescription. FWIW, I had a similar issue with a split antenna rptr many years ago and resolved it by swapping antennas. The complaining stick was on the xmtr side. When it was just dealing with signal levels, it was as quiet as a church mouse. It was a temporary fix and I doubted it would last very long but surprisingly it outlasted the repeater itself. We've had similar problems at 2 sites with separate TX RX antennas. One would start generating noise after a lightning strike, so we swapped them, putting the struck antenna on RX. Been working fine since. Bob NO6B
