Re: [Repeater-Builder] Duplexer questions
On Wed, 8 Feb 2006, N9WYS wrote: > running about 50W with the old PA. (BTW - There is an isolator between > the duplexer and the PA.) Will this cause me any grief either now or Here's a thought -- if you put a isolator between the PA and the duplexer, and a isolator between the duplexer and the antenna, wouldn't your duplexer see a near perfect 50 ohms at all times? I've heard one local ham talk about his theories of repeaters, and he strongly supports making sure the SWR is as low as possible. I used to think he's nuts, then I realized there is some truth in that -- at a minimum SWR, the antenna is as close to matched as possible, even if that is slightly off frequency. It makes sense to me that if the PA is expecting a 50-ohm load, and the antenna is 50-ohms, then the SWR will be 1:1. Comments? -- Kris Kirby, KE4AHR <[EMAIL PROTECTED]> "BIG BROTHER IS WATCHING YOU!" This message brought to you by the US Department of Homeland Security 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 questions
> Can someone please explain what the difference is between a > BandPass/BandReject duplexer and a BandPass/Notch duplexer? In our little two-way radio world, the answer is that there is no difference. Technically speaking, a "notch" is very narrow, targeting only a specific frequency. A theoretical definition of a notch might include the phrase "infinitesimally narrow", but that doesn't exist in the real world - you can't achive an infinite Q. Likewise, as is often seen in other RF endeavors, a "band reject" implies a wider reject response, not just a single targeted frequency. For example, a band reject filter used in the TV/CATV world might reject a whole 6 MHz wide channel, or several contiguous channels. But the bottom line is that, in two-way, manufacturers seem to use the two terms interchangably. So don't lose any sleep over it. > Also - I just put a new PA online today on my 444.550 > machine. The duplexer I have is rated at 100W, and the PA is > putting about 150W into it -- I was running about 50W with > the old PA. (BTW - There is an isolator between the duplexer > and the PA.) Will this cause me any grief either now or down > the road and if so, in what way?? Quite possibly, yes. Duplexers' maximum power rating is usually a function of one of two factors: either its ability (or lack thereof) to dissipate heat as a function of insertion loss, or the breakdown voltages of one or more of its internal components (such as piston trimmer caps or thin dielectric materials). --- Jeff Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Duplexer questions
Can someone please explain what the difference is between a BandPass/BandReject duplexer and a BandPass/Notch duplexer? Is one more desirable that the other and if so, why? Also - I just put a new PA online today on my 444.550 machine. The duplexer I have is rated at 100W, and the PA is putting about 150W into it -- I was running about 50W with the old PA. (BTW - There is an isolator between the duplexer and the PA.) Will this cause me any grief either now or down the road and if so, in what way?? I'm finally getting the bugs tuned out of this system and I want it to be top-shelf. (Of course!) Thanks in advance! Mark - N9WYS Repeater Trustee - WW9AE repeater (444.550 + PL114.8) YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Remote base radio help...
I interfaced a VXR-5000 to several different controllers over the years and got painfully familiar with the available inputs and outputs. You mentioned that you connected the collector of your interface circuit to the COS pin on the VXR-5000. What connector and pin on the VXR are you considering the COS? Normally the COS is an output from a receiver indicating the presence of a signal. But from your description it appears that the logic level you are buffering from the ICOM remote base is actually a COS. If you are trying to force the VXR-5000 to transmit when the ICOM is receiving a signal you would need to force the PTT active on the VXR-5000. Conversely, to have a received signal on the VXR-5000 key up the remote base you would need to take the VXR-5000 COS and interface it to the remote base PTT. There are other considerations to take into account Is the VXR-5000 interfaced to a controller is it using it's own internal controller? Audio routing in the VXR-5000 also depends on whether it is using an internal vs. external controller. Doug - Original Message - From: n2len To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 07, 2006 1:03 PM Subject: [Repeater-Builder] Remote base radio help... Hello, I am presently hooking ua remote base radio to my vxr5000. The 5000 COS needs a contact closure to make function. I am using a ICOM 207 via 6 pin mini din for signaling. I have used a 2N transistor set up as a open collector output circuit to trigger the COS on the 5000 repeater. Diagram:Base---ICOM207 Squelch Output to 4.7K resistor to base leg of transistorCollectorFeeds COS pin on VERTEX VXR5000EmitterGNDNow the link radio only works one way when I switch it on.When the 5000 transmits the link radio keys up and sends audio to the other machine. But when the other machine keys up nothing back. The link radio receives the signal but it dosent throw the 5000 into transmit. So I am thinking I have a COS problem with the transistor circuit I built.So my question is. Do I need this transistor circuit to activate COS on the repeater or can I just wire the Squelch output of the 207 directly to the COS pin on the VXR5000. Is the ICOM207 logic level at the mini din. I know that this is specific information to my situation, but I figured to ask anyway.Thanks Yahoo! Groups Links<*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/<*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED]<*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Re: Mastr II UHF Base Station
The power dividers/combiners are just Wilkinsons. They are built into little square chassis with perforations for cooling, with a monolithic 100 ohm resistor mounted to the chassis and the usual quarter-wave 75 ohm matching sections. Nothing fancy. --- Jeff > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Coy Hilton > Sent: Tuesday, February 07, 2006 8:41 PM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Re: Mastr II UHF Base Station > > > Jeff, how's the driver PA harness built and how are the 2 PAs > outputs combined? Do you have any information or specs on the RF and > matching harnesses and how they are built? > > --- In Repeater-Builder@yahoogroups.com, "Jeff DePolo WN3A" > <[EMAIL PROTECTED]> wrote: > > > > > I am looking at acquiring a GE Master II UHF Base station. This > is a 300 > > watt solid state transmitter, which how I understand it, has 2 PAs > running > > in parallel. > > > > It's actually 200 watts, and yes, there are two "final" PA's, each > capable > > of 100 watts output, that are combined. However, each "final" PA > requires > > around 35 watts of drive - the final PA's are really the same as a > 100 watt > > station PA, but without the 40 watt driver board. > > > > Drive to the PA's is provided by a standard 100 watt PA. So, what > you have > > is the exciter (200 mW) driving the intermediate PA (100 watt, > attached to > > the main station chassis), which gets power-divided to feed the > two final > > PA's, the output of which then are combined to yield 200 watts. > > > > > What I am wondering is, can these amps be run separately, or do > they > > always have to run together in parallel? > > > > Not really, since each requires about 35 watts drive, so you still > need > > something to drive them with. If you only want 100 watts, then > just run the > > 100 watt IPA to the antenna and leave the two final PA's on the > shelf as > > spare parts. > > > > --- Jeff > > > > > > > > > > > > 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] Re: Mastr II UHF Base Station
Jeff, how's the driver PA harness built and how are the 2 PAs outputs combined? Do you have any information or specs on the RF and matching harnesses and how they are built? --- In Repeater-Builder@yahoogroups.com, "Jeff DePolo WN3A" <[EMAIL PROTECTED]> wrote: > > > I am looking at acquiring a GE Master II UHF Base station. This is a 300 > watt solid state transmitter, which how I understand it, has 2 PAs running > in parallel. > > It's actually 200 watts, and yes, there are two "final" PA's, each capable > of 100 watts output, that are combined. However, each "final" PA requires > around 35 watts of drive - the final PA's are really the same as a 100 watt > station PA, but without the 40 watt driver board. > > Drive to the PA's is provided by a standard 100 watt PA. So, what you have > is the exciter (200 mW) driving the intermediate PA (100 watt, attached to > the main station chassis), which gets power-divided to feed the two final > PA's, the output of which then are combined to yield 200 watts. > > > What I am wondering is, can these amps be run separately, or do they > always have to run together in parallel? > > Not really, since each requires about 35 watts drive, so you still need > something to drive them with. If you only want 100 watts, then just run the > 100 watt IPA to the antenna and leave the two final PA's on the shelf as > spare parts. > > --- Jeff > 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] Re: Remote base radio help...
>From reading your post, what I'm getting is that the Icom is keying the VXR5000 okay. When the VXR5000 receives the responding radio that it isn'y keying the ICOM. If that is right, you also need a similar circuit from the COS circuit in the VXR5000 to key the ICOM. .NEVER CONNECT ONE TYPE OF RADIO TO ANOTHER WITH OUT SOME KIND OF BUFFERING CIRCUIT like the transistor switch that you have built, with out completely understand both circuits. after you let the smoke out it is too late to say AAA CRAP GOOD LUCK! --- In Repeater-Builder@yahoogroups.com, "n2len" <[EMAIL PROTECTED]> wrote: > > Hello, > > I am presently hooking ua remote base radio to my vxr5000. The 5000 COS > needs a contact closure to make function. I am using a ICOM 207 via 6 > pin mini din for signaling. I have used a 2N transistor set up as a > open collector output circuit to trigger the COS on the 5000 repeater. > > Diagram: > Base---ICOM207 Squelch Output to 4.7K resistor to base leg of transistor > CollectorFeeds COS pin on VERTEX VXR5000 > EmitterGND > > Now the link radio only works one way when I switch it on. > When the 5000 transmits the link radio keys up and sends audio to the > other machine. But when the other machine keys up nothing back. The > link radio receives the signal but it dosent throw the 5000 into > transmit. So I am thinking I have a COS problem with the transistor > circuit I built. > > So my question is. Do I need this transistor circuit to activate COS on > the repeater or can I just wire the Squelch output of the 207 directly > to the COS pin on the VXR5000. Is the ICOM207 logic level at the mini > din. > > I know that this is specific information to my situation, but I figured > to ask anyway. > > Thanks > 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] FW: WACOM 639 AND 641
-Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com] On Behalf Of lcradio2002 Sent: Monday, February 06, 2006 1:49 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] VHF duplexer wanted Anybody have a decent set of VHF duplexers for sale? I have a set of bandpass duplexers on my 34/94 machine, and it just does not have enough rejection. I would like to locate a set of bandpass/bandreject duplexer cavities for it. Thanks, Tracy : FW: WACOM 639 AND 641 From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Subject: WACOM 639 AND 641 Date: Tue, 7 Feb 2006 15:25:42 + HI GROUP I HAVE A WACOM WP-639VHF DUPLEXER AND WP-641 I WILL SELL ONE AND KEEP THE OTHER... PLEASE CONTACT ME OFF LINE AT 254-857-3166 OR EMAIL ME [EMAIL PROTECTED] AND I CAN SEND PICS AND PRICE THANK YOU YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.2/252 - Release Date: 2/6/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.2/252 - Release Date: 2/6/2006
[Repeater-Builder] Re: Micor Recrystalled Element Problem
ERIC, VERY WELL PUT I APPLAUD ALL OF YOUR COMMENTS!!! My repeaters have been on the air for a few years and they still are not complete. I started as close to perfect as I could get them and continue to try and make improvments with new antennas, added features and what ever I can think of to make it better! Again Great Comments!! When I worked in the two way shop before I was licensed as a HAM I remember listening to a local repeater and thinking how great it sounded compaired to the equipment that we had and with much less money spent, and older equipment. Now I know, it is by learning as much as you can and careing how your equipment sounds and making as many improvments as you can. --- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> wrote: > > Randy, > > I think the subject has been covered well enough already. Perhaps the best > analogy would be a Hewlett-Packard power meter, where the sensor is matched > to, and calibrated with, the meter itself. If the sensor should somehow be > destroyed by accident, one could not simply purchase a new sensor and expect > it to work with the existing meter. One must ship the meter and the sensor > back to the factory for alignment and calibration. Like the crystal and the > channel element, they are a "matched pair." > > While I understand and respect the opinions of those who maintain that > Amateur Radio transmitters can embrace a much more relaxed level of > precision than commercial transmitters, I cannot help but wonder why this > feeling is so pervasive. My personal feeling is that the public impression > of Amateur Radio (notice the capitals!) is greatly enhanced when such > installations meet or exceed the workmanship levels found in a typical > commercial installation. Many others more vocal than I have lamented that > some installations by Amateur Radio licensees have been so amateurish that > they demean the name. I submit that an Amateur Radio repeater should always > incorporate the State of the Art, with the appropriate bandpass cavities, > isolators, filters, and components that will ensure a reliable, trouble-free > installation. Moreover, I cringe when I hear that a substandard > installation is okay, simply because it's "only" an Amateur Radio project! > > I congratulate you on taking the high road to correct the problem with your > channel element. > > 73, Eric Lemmon WB6FLY > > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of Randy Nelson > Sent: Monday, February 06, 2006 6:26 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Micor Recrystalled Element Problem > > I tried another channel element and the error was worse. Both the xtal > and element are on their way back to ICM. It will be interesting to see > if ICM admits an error or blames it on the element. > > Randy > > > > > > 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: Micro Strips @ 220 MHz
Kevin, No, they are specified with a cutoff of 175 MHz, durn it! I don't know how much fudge factor they give in them but I would think I could manage something out of them. I am sort of disappointed that I can't get anything past the transistors though. I do think it's the micro strips fault though. I am going to work on them a bit. The transmitter was making 80 watts before I started working on it. I did get some ideas from the R/B site, thanks. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Kevin Custer Sent: Tuesday, February 07, 2006 5:33 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Micro Strips @ 220 MHz Paul Finch wrote: >Kevin, > >OK, I understand now. I have (in a past life) worked as a RF engineer but >don't have any of the equipment available to me. This is a Johnson Fleetcom >II 530 radio I am trying to modify. Everything so far has moved to 224 MHz >OK except these micro strips, it like it hits a brick wall. I will read the >part about the Japanese PA Module. > >What can I say, I am a different kind of guy, I have plenty of these radios >so I thought I would at least try one. > >Will keep the Builder informed on how it comes out. > If the transistors used by Johnson have a FT of greater than 224 MHz, you might have good luck! Let us know how you make out... Kevin 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: Micro Strips @ 220 MHz
Paul Finch wrote: >Kevin, > >OK, I understand now. I have (in a past life) worked as a RF engineer but >don't have any of the equipment available to me. This is a Johnson Fleetcom >II 530 radio I am trying to modify. Everything so far has moved to 224 MHz >OK except these micro strips, it like it hits a brick wall. I will read the >part about the Japanese PA Module. > >What can I say, I am a different kind of guy, I have plenty of these radios >so I thought I would at least try one. > >Will keep the Builder informed on how it comes out. > If the transistors used by Johnson have a FT of greater than 224 MHz, you might have good luck! Let us know how you make out... Kevin 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] GE MAstr Exec II UHF Desktop base stations
Hello, Anyone need any of these UHF GE radios? I still have several holding my concrete floor down in my shop, one good thing, I will never blow away! They have all been tested and have one TX and one RX channel element tuned up on 460/465.something. If interested reply directly to [EMAIL PROTECTED] . Paul 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] Phasing two DB-252's
I assume one wavelength from center to center correct? T.J. KC8LTSBob Dengler <[EMAIL PROTECTED]> wrote: At 2/7/2006 09:18 AM, you wrote:>Does anyone know the formula for calculating the distance between two >DB-252 corner reflectors that are connected by a phasing harness? I'm >sure this is frequency dependent and I want to get the spacing correct.>I assume you're talking vertical separated corner reflectors aimed in the same direction.For maximum gain, 1 wavelength. You can reduce the spacing to ~0.8 wavelength to reduce nulls in the elevation pattern at the expense of maximum gain, IOW the main lobe gets "fatter" but the on-horizon gain drops a little.Bob NO6BYahoo! Groups Links<*> To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/<*> To unsubscribe from this group, send an email to:[EMAIL PROTECTED]<*> Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Phasing two DB-252's
I assume one wavelength from center to center correct? T.J. KC8LTSBob Dengler <[EMAIL PROTECTED]> wrote: At 2/7/2006 09:18 AM, you wrote:>Does anyone know the formula for calculating the distance between two >DB-252 corner reflectors that are connected by a phasing harness? I'm >sure this is frequency dependent and I want to get the spacing correct.>I assume you're talking vertical separated corner reflectors aimed in the same direction.For maximum gain, 1 wavelength. You can reduce the spacing to ~0.8 wavelength to reduce nulls in the elevation pattern at the expense of maximum gain, IOW the main lobe gets "fatter" but the on-horizon gain drops a little.Bob NO6BYahoo! Groups Links<*> To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/<*> To unsubscribe from this group, send an email to:[EMAIL PROTECTED]<*> Your use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/ YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Micor Recrystalled Element Problem
I see lots of the same kind of mentality around here. Many of the local hams that figure "if a little gain is good, then a whole lot more must be a lot better." 40-watt PA decks driving 100-watt PA decks, receiver preamplifiers running wide open at high-RF sites, single-shield coax for jumpers, RG-8 type coax for feedlines, no isolators/circulators anywhere, etc. etc. Trying to explain or reason with them just falls on deaf ears, and I'm the "Bad Guy". Then, after getting into a good repeater site, they continue to bring in (sneak in) more and more equipment (much more thn they had originally made arrangements for) without asking anyone who is actually involved with the site. Then they get kicked out of the site completely, ruining it for any hams who want to put up something in the same place (and do it properly!) in the future. Pretty sad LJ -Original Message- >From: Eric Lemmon <[EMAIL PROTECTED]> >Sent: Feb 6, 2006 10:15 PM >To: Repeater-Builder@yahoogroups.com >Subject: RE: [Repeater-Builder] Micor Recrystalled Element Problem > >Randy, > >I think the subject has been covered well enough already. Perhaps the best >analogy would be a Hewlett-Packard power meter, where the sensor is matched >to, and calibrated with, the meter itself. If the sensor should somehow be >destroyed by accident, one could not simply purchase a new sensor and expect >it to work with the existing meter. One must ship the meter and the sensor >back to the factory for alignment and calibration. Like the crystal and the >channel element, they are a "matched pair." > >While I understand and respect the opinions of those who maintain that >Amateur Radio transmitters can embrace a much more relaxed level of >precision than commercial transmitters, I cannot help but wonder why this >feeling is so pervasive. My personal feeling is that the public impression >of Amateur Radio (notice the capitals!) is greatly enhanced when such >installations meet or exceed the workmanship levels found in a typical >commercial installation. Many others more vocal than I have lamented that >some installations by Amateur Radio licensees have been so amateurish that >they demean the name. I submit that an Amateur Radio repeater should always >incorporate the State of the Art, with the appropriate bandpass cavities, >isolators, filters, and components that will ensure a reliable, trouble-free >installation. Moreover, I cringe when I hear that a substandard >installation is okay, simply because it's "only" an Amateur Radio project! > >I congratulate you on taking the high road to correct the problem with your >channel element. > >73, Eric Lemmon WB6FLY > > >-Original Message- >From: Repeater-Builder@yahoogroups.com >[mailto:[EMAIL PROTECTED] On Behalf Of Randy Nelson >Sent: Monday, February 06, 2006 6:26 PM >To: Repeater-Builder@yahoogroups.com >Subject: Re: [Repeater-Builder] Micor Recrystalled Element Problem > >I tried another channel element and the error was worse. Both the xtal >and element are on their way back to ICM. It will be interesting to see >if ICM admits an error or blames it on the element. > >Randy > > > > > >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: LM-386 audio buffer board
ldgelectronics wrote: > I have a board that is 90% of that. It was meant to be used with an > off board pot and does not have the .05 uF / 10 ohm network. > > This was for another project that never took off. I have hundreds of > them that you can have just for the shipping cost. Let's say $1 for 5 > or less. E-mail me directly. Dwayne, I would be interrested in these PCB's too. Can you send them to Finland, Europe in a cushioned envelope or similar? I would like to buy 30 of them, which would be $6, added with shipping costs. How much I should send you over paypal? .. Erik OH2LAK 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: LM-386 audio buffer board
I'd be interested in some too. Paul kb9wlc --- ldgelectronics <[EMAIL PROTECTED]> wrote: > I have a board that is 90% of that. It was meant to > be used with an > off board pot and does not have the .05 uF / 10 ohm > network. > > This was for another project that never took off. I > have hundreds of > them that you can have just for the shipping cost. > Let's say $1 for 5 > or less. E-mail me directly. > > > Dwayne Kincaid > WD8OYG > > > > > > Did anybody ever cut a board for the LM-386 audio > buffer project on > the > > repeater builder web site? I am getting tired of > vector boarding > the > > things. > > > > Thanks, > > > > td > > wb6mie > > > > > > > > > > > > > Yahoo! Groups Links > > > [EMAIL PROTECTED] > > > > > __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com 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: Dupelxer wierdness
> If I take all the opinions I've seen in the last month as fact, then > the pass adjustments on duplexers can't be tuned. I'll take most of what you said as being sarcastic, but your point is taken. If tuned with a quality network analyzer, or with a return loss bridge and high return loss terminations and pads, you will have pass performance properly tuned. The only question is whether or not your transmitter likes a real 50 ohm load. If so, great, you're done. If not, fix it. With the cavities tuned to resonance, cable lengths are no longer an issue. Needing to use "magic" cable lengths should be a red flag that you've got a Z mismatch somewhere. > (Except by wizards at Mount Wacom, who use equipment that resides in the fifth dimension.) Even the demigods that hail from Waco, Marlboro, and Angola aren't infallible, especially after the evil Brownshirt Brigade percussively retunes their products while en route to you. All Hail Maxwell! All Hail Maxwell! --- Jeff 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] Re: Dupelxer wierdness
> Don't tune pass or pass/reject cavities with a tracking generator and > spectrum analyzer which shows only insertion loss. Don't. Don't. > Don't. You need to look at return loss. Search the archives - this > issue has come up and beaten down on more than one occasion... So you can't tune them on the real transmitter under power, they'll be damaged. You can't pad down the transmitter and tune them, that changes the impedance. You can't tune them on a spectrum analyzer, not the same impedance or cables, and dosen't show return loss. You can't tune them on a network analyzer, since it's not the same impedance as the transmitter, and won't use the same cables. If I take all the opinions I've seen in the last month as fact, then the pass adjustments on duplexers can't be tuned. (Except by wizards at Mount Wacom, who use equipment that resides in the fifth dimension.) Notches though, are easier. 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] Re: Dupelxer wierdness
> I also have a big difference between the bird and the service monitor. Since the service monitor goes in for periodic calibration, I always assumed it was correct over the bird readings. I would consider this a big alarm bell.. 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] Re: LM-386 audio buffer board
I have a board that is 90% of that. It was meant to be used with an off board pot and does not have the .05 uF / 10 ohm network. This was for another project that never took off. I have hundreds of them that you can have just for the shipping cost. Let's say $1 for 5 or less. E-mail me directly. Dwayne Kincaid WD8OYG > > Did anybody ever cut a board for the LM-386 audio buffer project on the > repeater builder web site? I am getting tired of vector boarding the > things. > > Thanks, > > td > wb6mie > 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] Remote base radio help...
Hello, I am presently hooking ua remote base radio to my vxr5000. The 5000 COS needs a contact closure to make function. I am using a ICOM 207 via 6 pin mini din for signaling. I have used a 2N transistor set up as a open collector output circuit to trigger the COS on the 5000 repeater. Diagram: Base---ICOM207 Squelch Output to 4.7K resistor to base leg of transistor CollectorFeeds COS pin on VERTEX VXR5000 EmitterGND Now the link radio only works one way when I switch it on. When the 5000 transmits the link radio keys up and sends audio to the other machine. But when the other machine keys up nothing back. The link radio receives the signal but it dosent throw the 5000 into transmit. So I am thinking I have a COS problem with the transistor circuit I built. So my question is. Do I need this transistor circuit to activate COS on the repeater or can I just wire the Squelch output of the 207 directly to the COS pin on the VXR5000. Is the ICOM207 logic level at the mini din. I know that this is specific information to my situation, but I figured to ask anyway. Thanks 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] Phasing two DB-252's
At 2/7/2006 09:18 AM, you wrote: >Does anyone know the formula for calculating the distance between two >DB-252 corner reflectors that are connected by a phasing harness? I'm >sure this is frequency dependent and I want to get the spacing correct. > I assume you're talking vertical separated corner reflectors aimed in the same direction. For maximum gain, 1 wavelength. You can reduce the spacing to ~0.8 wavelength to reduce nulls in the elevation pattern at the expense of maximum gain, IOW the main lobe gets "fatter" but the on-horizon gain drops a little. Bob NO6B 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] Re: uniden repeater help
I've already helped this guy out... (and a few others who emailed me). cheers, skipp > [EMAIL PROTECTED] wrote: > awesome let me know how much it cost to copy > and mail and I'll remit it to > you KB1chu > 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] Phasing two DB-252's
Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is frequency dependent and I want to get the spacing correct. Thanks T.J. KC8LTS YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Paul Holm message virus
If you subscribe to this list and your email provider is Versatel, you might want to check your computer for an email virus. 62.58.184.34 inetnum: 62.58.184.32 - 62.58.184.39 netname: VERSATEL-CUST-JONGENELEN-VIDEO-ROOSENDAAL descr:Versatel FBIoADSL customer country: NL -rick 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] Cheap RF components for your projects
http://hem.passagen.se/communication/component.html Brings words and photos together (easily) with PhotoMail - it's free and works with Yahoo! Mail. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] uniden repeater help
awesome let me know how much it cost to copy and mail and I'll remit it to you KB1chu YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] mods.dk (possiably OT)
"Richard D. Reese" <[EMAIL PROTECTED]> wrote: >Mike; > >That's me. How do we know one another? I see you were born in 1967. >I did work car 7 in the early 70's. You would have been a bit young >Back then. What did I do to have you remember me after all of these >years? >I hope it was something good!!! > > I retired in 96 as commander of the gang investigations unit. I am >still in the area and very active with volunteer work and our nine >grandchildren!!! I operate all bands from 160 meters through 2.4 GHz. >Send me your number direct and I will call you on the phone. You have >me >very curious... > >73 >Rich WA8DBW >http://www.wa8dbw.ifip.com I read your email to Mike, in Repeater-Builder. I am interested in more information on 2.4 Ghz. Where does one locate parts? Is it easier to build the circuits or purchase pre-assembled parts? How much forward power is needed to reach 25-30, straight line of sight, miles, on 2.4 GHz? How big an antenna is needed? What are the basic parts of a 2.4 Ghz station? Which is better to take a small sample of 146 Mhz & mix it in a transverter to get 2.4 Ghz? Or feed audio into a 2.4Ghz unit? At my earth station job, we use a 70 Mhz IF. So, could I use a 146 Mhz IF, with a transverter, to get 2.4 Ghz? Which would best for 25-30 miles 903Mhz, 1.2 Ghz, or 2.4 Ghz? Of course, have considered and may use Uhf, if I can locate proper equipment. Where can I read more about sources of & how to interface microwave communications equipment? Are there many Ghz stations in the 48 states? So, as you can see I have a basic idea of the parts used to get to 2.4 Ghz. Although, I am interested in more information. Thanks for your time. Aloha, JimKh6jkg. [EMAIL PROTECTED] __ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp 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/
