[Repeater-Builder] 3 Channel UHF Ferrite Combiner
Ok, I been all over the web and cant seem to find any documentation on the critical cable lengths to build a 3 channel combiner. Does anyone happen to have such a document. Thanks, Mike Mullarkey (K7PFJ)
[Repeater-Builder] Re: Sinclair Q-2B05D duplexer
Laryn - many tnx for the info. As I suspected., won't do ham 600 khz split. I guess I'll dispose of. Tnx again Jerry VE3 EXT
[Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
There is more than one type of combiner possible... depending on frequency spacing, band of operation and power level. s. Mike Mullarkey [EMAIL PROTECTED] wrote: Ok, I been all over the web and cant seem to find any documentation on the critical cable lengths to build a 3 channel combiner. Does anyone happen to have such a document. Thanks, Mike Mullarkey (K7PFJ)
RE: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
HI Skip, Very tight outdoor cabinet. We need to combine TX 447.750, 447,850 and 464.900 into one antenna. I know this is not optimum but this is what we have to work with. Mike Mullarkey (K7PFJ) _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Sunday, September 16, 2007 9:05 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner There is more than one type of combiner possible... depending on frequency spacing, band of operation and power level. s. Mike Mullarkey [EMAIL PROTECTED] wrote: Ok, I been all over the web and cant seem to find any documentation on the critical cable lengths to build a 3 channel combiner. Does anyone happen to have such a document. Thanks, Mike Mullarkey (K7PFJ)
Re: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
I would have interest in this also as I need to combine 443.150 and 462.600 to 1 ant thank you Merrill KG4IDD Mike Mullarkey wrote: HI Skip, Very tight outdoor cabinet. We need to combine TX 447.750, 447,850 and 464.900 into one antenna. I know this is not optimum but this is what we have to work with. Mike Mullarkey (K7PFJ) *From:* Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] *On Behalf Of *skipp025 *Sent:* Sunday, September 16, 2007 9:05 AM *To:* Repeater-Builder@yahoogroups.com *Subject:* [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner There is more than one type of combiner possible... depending on frequency spacing, band of operation and power level. s. Mike Mullarkey [EMAIL PROTECTED] wrote: Ok, I been all over the web and cant seem to find any documentation on the critical cable lengths to build a 3 channel combiner. Does anyone happen to have such a document. Thanks, Mike Mullarkey (K7PFJ)
[Repeater-Builder] Re: Sinclair Q-2B05D duplexer
--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: Laryn - many tnx for the info. As I suspected., won't do ham 600 khz split. Yup, won't do normal repeater split, but it is still useful to combine two transmitters, two simplex stations, etc., as long as 3 mc. separated. Don't dump it... Laryn K8TVZ
[Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
--- In Repeater-Builder@yahoogroups.com, Merrill [EMAIL PROTECTED] wrote: I would have interest in this also as I need to combine 443.150 and 462.600 to 1 ant thank you Merrill KG4IDD I'm just addressing the two-port project above-- would not an ordinary duplexer work just fine? Laryn K8TVZ
RE: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
I would have interest in this also as I need to combine 443.150 and 462.600 to 1 ant thank you Merrill KG4IDD I'm just addressing the two-port project above-- would not an ordinary duplexer work just fine? Laryn K8TVZ Yep, do it all the time. When combining transmitters, you need to pay careful attention to IM products as measured at the output of the combiner. While Part 97 is silent on the issue of spectral purity above 225 MHz, that doesn't mean you're off the hook if your IM products are bothering someone else. A good cleanliness spec to target for IM products is they should be 43 + 10 log (watts) down (e.g. -63 dBc for 100 watts of transmitter power). That spec will also satisfy Part 95 GMRS for the 462.6 transmitter. Measure the IM products at the antenna tee while both transmitters are keyed to ensure they are adequately attenuated. A duplexer with 60 dB or so of isolation should be more than adequate. If your transmitters already have isolators built in (Micor, MSF, PURC, etc.), you may only need two pass/reject cavities, one per side, to combine cleanly. --- Jeff
[Repeater-Builder] Motorola R100 Cabinet Key
Does the Motorola Radius R100 repeater use a standard 2135 key for the cabinet lock, or something else? 73, Eric Lemmon WB6FLY
[Repeater-Builder] Re: Motorola R100 Cabinet Key
Yes - 2135. Unless its been fubard. Gary W7TRP --- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED] wrote: Does the Motorola Radius R100 repeater use a standard 2135 key for the cabinet lock, or something else? 73, Eric Lemmon WB6FLY
Re: [Repeater-Builder] Motorola R100 Cabinet Key
yes it does - Original Message - From: Eric Lemmon To: Repeater-Builder@yahoogroups.com ; [EMAIL PROTECTED] ; [EMAIL PROTECTED] ; 'Discussion of equipment manufactured by Motorola' Sent: Sunday, September 16, 2007 4:48 PM Subject: [Repeater-Builder] Motorola R100 Cabinet Key Does the Motorola Radius R100 repeater use a standard 2135 key for the cabinet lock, or something else? 73, Eric Lemmon WB6FLY
Re: [Repeater-Builder] Digipeater deviation
Technically, 15 kHz is normal/standard/original FM and 5 is NarrowBand FM (which is what all hams use these days except for some links). Joe M. David Murman wrote: You bet. Normal deviation is + - 5 KHZ. The old wideband FM deviation was + - 15 KHZ. David - Original Message - From: Nevada Amateur Radio Repeaters, Inc. To: Repeater-Builder@yahoogroups.com Sent: Saturday, September 15, 2007 11:08 AM Subject: [Repeater-Builder] Digipeater deviation What is the allowable deviation for a two meter digipeater in amateur service? Is 15 kHz excessive?
Re: [Repeater-Builder] Motorola R100 Cabinet Key
Yes 2135 is standard in the R100 Milt N3LTQ - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com; [EMAIL PROTECTED]; [EMAIL PROTECTED]; 'Discussion of equipment manufactured by Motorola' [EMAIL PROTECTED] Sent: Sunday, September 16, 2007 4:48 PM Subject: [Repeater-Builder] Motorola R100 Cabinet Key Does the Motorola Radius R100 repeater use a standard 2135 key for the cabinet lock, or something else? 73, Eric Lemmon WB6FLY Yahoo! Groups Links
RE: [Repeater-Builder] Motorola R100 Cabinet Key
The six R100S' that I have, use the 2135 key! 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] Motorola R100 Cabinet Key From: Eric Lemmon [EMAIL PROTECTED] Date: Sun, September 16, 2007 3:48 pm To: Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED], [EMAIL PROTECTED], 'Discussion of equipment manufactured by Motorola' [EMAIL PROTECTED] Does the Motorola Radius R100 repeater use a standard 2135 key for the cabinet lock, or something else? 73, Eric Lemmon WB6FLY Yahoo! Groups Links
[Repeater-Builder] Motorola R100 Cabinet Key - SOLVED!
The majority have spoken! The 2135 key it is. Thanks to all who responded. I am in the process of scanning a virgin R100 Service Manual into PDF, and I wanted to include the key information- which the manual does not mention. I don't have an R100 to verify which key it is. The R100 manual 6881078E15-O will be available for download from the Repeater-Builder site in a few weeks. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Charles Mumphrey Kc5ozh Sent: Sunday, September 16, 2007 7:36 PM To: Repeater-Builder@yahoogroups.com; [EMAIL PROTECTED] Subject: RE: [Repeater-Builder] Motorola R100 Cabinet Key The six R100S' that I have, use the 2135 key! 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 http://www.CharliesElectronics.com Original Message Subject: [Repeater-Builder] Motorola R100 Cabinet Key From: Eric Lemmon [EMAIL PROTECTED] mailto:wb6fly%40verizon.net Date: Sun, September 16, 2007 3:48 pm To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , [EMAIL PROTECTED] mailto:Motorola-Micor%40yahoogroups.com , [EMAIL PROTECTED] mailto:Motorola-Radius%40yahoogroups.com , 'Discussion of equipment manufactured by Motorola' [EMAIL PROTECTED] mailto:motorola%40mailman.qth.net Does the Motorola Radius R100 repeater use a standard 2135 key for the cabinet lock, or something else? 73, Eric Lemmon WB6FLY
[Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
We need to combine TX 447.750, 447,850 and 464.900 into one antenna. I know this is not optimum but this is what we have to work with. The two Amateur Band Transmitters are 100KHz spaced with the commercial box more than 10MHz higher. To keep things short and sweet, the close spaced Amateur Transmitters are probably best done with a 2 port hybrid. Depending on your resources... the hybrid output would more often be bandpass combined with the 464 commercial box path. All this can be done on one or two antennas, just takes the proper hardware in place and a lot of homework. Making it fit into a very space limited cabinet is the magic trick. cheers, s.
RE: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner
The only way to do the close spaced frequencies 447.750 and 447.850 is with a hybrid type combiner. The other channel 464.900 can be added in to the antenna line with an isolator and a pass cavity or you could use a duplexer. But with a duplexer you have to be careful of IM products more so than when using an isolator. With an isolator and cavity type combiner the cables to the T or multi junction connector to the cavities are ¼ wave length. That length includes the loop length and is best obtained from the cavity manufacturer. The frequencies need to be far enough apart so that the cavity provides at least 10 db of skirt isolation to the other frequencies. You can think of the cavity as performing a switch action or disconnecting that part of the circuit from the other frequencies by enough so that it does not load down the other frequencies at the multipoint junction. The cavity operates as a short circuit (10 db down short at least) and the short gets transformed to an open thru the ¼ wave length line to the junction at the other frequencies. 73 Gary K4FMX _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Mike Mullarkey Sent: Sunday, September 16, 2007 10:58 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner HI Skip, Very tight outdoor cabinet. We need to combine TX 447.750, 447,850 and 464.900 into one antenna. I know this is not optimum but this is what we have to work with. Mike Mullarkey (K7PFJ) _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Sunday, September 16, 2007 9:05 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: 3 Channel UHF Ferrite Combiner There is more than one type of combiner possible... depending on frequency spacing, band of operation and power level. s. Mike Mullarkey [EMAIL PROTECTED] wrote: Ok, I been all over the web and cant seem to find any documentation on the critical cable lengths to build a 3 channel combiner. Does anyone happen to have such a document. Thanks, Mike Mullarkey (K7PFJ)
