Re: [Repeater-Builder] Re: motorola R-100 repeater
Got this working thank you all for your help it was in the software. john - Original Message - From: "motarolla_doctor" <[EMAIL PROTECTED]> To: Sent: Tuesday, February 01, 2005 5:47 AM Subject: [Repeater-Builder] Re: motorola R-100 repeater > > > --- In Repeater-Builder@yahoogroups.com, "Maire Company" > <[EMAIL PROTECTED]> wrote: >> had to reload the software into the computer. >> now when I go to read the repeater on rx or tx I get the same error. >> after it go thought read 1, 2, 3,and 4 when it gets to 5 it comes > up with a check sum error. any thoughts help >> thanks > > Your computer may be way too fast, the R100 s/w is OLD, and does not > run correctly on any faster than a old 286 10mhz with DOS 5xx or 6.0. > > You could also have a bad EEProm, or bad data in it, common problems. > > > > > > > > > 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] Cell Phone
At 03:32 PM 4/9/2005, Benjamin Naber wrote: >Here's something else to be figure out > > Who invented the cell phone and what was the >original use? And where was the first tower installed? > > > Cell phones are pretty neat in their complexity, yet >they are interesting to follow along and just wonder >how long it took them to get the *seemless* call >handoff figured out. When did they get that going? :) Actually it's pretty good now, when I don't get dumped. Once, I got a roaming bill that showed me traveling faster than light I think, one second I was in Auburn CA, the next I was in Chico! I tried to explain to the nice lady that this is impossible on the face of it, but she wasn't having any of it. 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] GLB Part
Do you still need a MRF-901? Let me know. I still have some in one of the parts bins. Richard D. Reese http://www.wa8dbw.ifip.com - Original Message - From: "kc4wgh" <[EMAIL PROTECTED]> To: Sent: Friday, April 08, 2005 11:59 AM Subject: [Repeater-Builder] GLB Part > > > Hi all, I am looking for a transistor that's in a GLB Preselector- > Preamp. This is for the two (2) meter band. Here's the information > (best that I can see) M (batwing) u 901 Thanks in advance 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] Cell Phone
Dr Martin Cooper. I saw a documentary on him a couple of years back. Here's a bit more on it. http://inventors.about.com/library/weekly/aa070899.htm Dexter McIntyre W4DEX wrote: >Benjamin Naber wrote: > > > >>Here's something else to be figure out >> >> Who invented the cell phone and what was the >>original use? And where was the first tower installed? >> >> >> > >The subject is OT but..somewhere I have a late 70's AT&T "Bell Labs >Record" magazine which featured this new technology. The idea had been >around for many years prior but technology wasn't available. Seems like >the first test were conducted in the Chicago area. > >Dex > > > > > >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] Cell Phone
Benjamin Naber wrote: > Here's something else to be figure out > > Who invented the cell phone and what was the > original use? And where was the first tower installed? > The subject is OT but..somewhere I have a late 70's AT&T "Bell Labs Record" magazine which featured this new technology. The idea had been around for many years prior but technology wasn't available. Seems like the first test were conducted in the Chicago area. Dex 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] Versatone 100hz
Hello List, Would anyone have a GE Versatone network (white plastic) believe the number # 19C320291G1 for sale or trade? I have a 136.5 and need one at either 100hz or an 88.5hz. Contact me off list please ... larry at thunderbolt.net Thanks Larry Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] Cell Phone
The first cell system was built in Chicago in the spring of 1984. Switch equipment was furnished by EFJohnson . In the fall of 1984 Motorola built their first cell system in Washington DC. - Original Message - From: "Benjamin Naber" <[EMAIL PROTECTED]> To: Sent: Saturday, April 09, 2005 3:32 PM Subject: Re: [Repeater-Builder] Cell Phone > > Here's something else to be figure out > > Who invented the cell phone and what was the > original use? And where was the first tower installed? > > > Cell phones are pretty neat in their complexity, yet > they are interesting to follow along and just wonder > how long it took them to get the *seemless* call > handoff figured out. > > With the change of everyone going digital, I wonder > how a guy can get his hands on the analog equipment. > Some of the stuff can be use for building 900MHz ham > repeaters... > > ~Ben, KB9LFZ > > > > > > > > > > Just a little interesting Trivia I read in the Local > > paper, The first > > Motorola cell Phone in 1984 the Dyna Tac Cost > > $3,9995, And weighed 2 > > Pounds and offered just one half hour of talk time > > then down for > > recharging. Now we know Cell phones weigh ounces > > last all day and > > sometimes free. > > > > Don KA9QJG > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > - > ~Ben, KB9LFZ > > Got your radio on and "listening?" > Then KEY the radio and and make some noise! > > > > > > __ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > > > > > 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] Cell Phone
Here's something else to be figure out Who invented the cell phone and what was the original use? And where was the first tower installed? Cell phones are pretty neat in their complexity, yet they are interesting to follow along and just wonder how long it took them to get the *seemless* call handoff figured out. With the change of everyone going digital, I wonder how a guy can get his hands on the analog equipment. Some of the stuff can be use for building 900MHz ham repeaters... ~Ben, KB9LFZ > > > Just a little interesting Trivia I read in the Local > paper, The first > Motorola cell Phone in 1984 the Dyna Tac Cost > $3,9995, And weighed 2 > Pounds and offered just one half hour of talk time > then down for > recharging. Now we know Cell phones weigh ounces > last all day and > sometimes free. > > Don KA9QJG > > > > > > > > > > Yahoo! Groups Links > > > [EMAIL PROTECTED] > > > > > > - ~Ben, KB9LFZ Got your radio on and "listening?" Then KEY the radio and and make some noise! __ 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: VHF preamps
At 08:49 AM 4/9/05, you wrote: >--- In Repeater-Builder@yahoogroups.com, Eric Lemmon <[EMAIL PROTECTED]> >wrote: >"...It is not a simple task to properly apply a preamp at VHF..." > > >As usual, Eric has given excellent advice. Preamps at VHF land mobile >are often not practical. > >Your first action should be an effective sensitivity test of your >receiver as it is currently configured. At many sites you will find >that your receiver sensitivity is already limited by the noise floor, >hence there is no improvement possible by adding a preamp. And there is a well done writeup on measuring effective sensitivity at www.repeater-builder.com Mike WA6ILQ 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] Johnson Scorpion programming cable?
At 10:54 AM 4/9/05, you wrote: >Does anyone have a schematic for a Johnson Scorpion programming cable? >or one they want to get rid of? > >Thanks >Brian Can't help you on the cable, but I can tell you that the programming software will not go below 450mhz unless patched. I helped a friend do that a number of years ago... the lower band limit is hard coded. If you do a hex dump on the exe file you will find a copyright notice for the C compiler that they used. I forget if it was Borland or Microsoft. The guy I was helping had the same compiler at work, just a different version. He compiled a short program that had the constants "450.0" and "440.0" in all the various forms (integer, real, double precision, etc...) and brought the binary home. We did a search for the "450" hex constants. We then patched the "440" constants into appropriate places and recalculated the checksums. The patched software worked, the radio turned out to be a paperweight. No, I do not have access to the patched software. Mike WA6ILQ 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] Johnson Scorpion programming cable?
Hi Does anyone have a schematic for a Johnson Scorpion programming cable? or one they want to get rid of? Thanks Brian 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] Kenwood TKR-720 VHF
This reminds me. Does anyone have any info on a TKR-720? I have acquired on 154 MHz. Will it program down to the ham band? Glenn Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Cell Phone
Just a little interesting Trivia I read in the Local paper, The first Motorola cell Phone in 1984 the Dyna Tac Cost $3,9995, And weighed 2 Pounds and offered just one half hour of talk time then down for recharging. Now we know Cell phones weigh ounces last all day and sometimes free. Don KA9QJG 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: Andrew Heliax LDF1-50
I think we may be playing "cross-questions" and "crooked answers" here... After referencing Catalog 38, you are correct regarding FSJ. I won't even go into the VXL series cable... Just one engineers practical perspective.. mike -Original Message- From: Roger Grady [mailto:[EMAIL PROTECTED] Sent: Friday, April 08, 2005 6:02 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: Andrew Heliax LDF1-50 At 04:21 PM 4/8/05, Mike Perryman wrote: >LDF is low-loss.. >FSJ is standard.. >and Super-Flex is as you describe below. Andrew calls LDF the "standard" cable, FSJ is Superflex (finer corrugations, can be bent to tighter radius and will stand more bends). FSJ has roughly 50% higher loss than LDF (at least in the 1/2" size and in the 150-450Mhz range that I compared). But even 1/2" FSJ has only 2.3 db/100' loss at 450Mhz. Roger Grady K9OPO 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] VHF preamps
Joel, You should call Chip Angle and he will sell you the highest quality pre amp period. http://www.anglelinear.com/ Oregon Repeater Linking Group Mike Mullarkey 6539 E Street Springfield, OR 97478 [EMAIL PROTECTED] www.orlg.org -Original Message- From: Joel Mele [mailto:[EMAIL PROTECTED] Sent: Saturday, April 09, 2005 1:01 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] VHF preamps Hello To All: Does any one have suggestions for a repeater preamp. 160 Mhz Rcv range and 153 Mhz Xmit range. I 'd like to find a unit with about 6-9dB gain, possibly with a preselector. I am trying to stay away from the Adance Receiver Research type that runs "wide open" with 24+ dB of gain. Thanks...Joel W4SLH Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] Re: VHF preamps
--- In Repeater-Builder@yahoogroups.com, Eric Lemmon <[EMAIL PROTECTED]> wrote: "...It is not a simple task to properly apply a preamp at VHF..." As usual, Eric has given excellent advice. Preamps at VHF land mobile are often not practical. Your first action should be an effective sensitivity test of your receiver as it is currently configured. At many sites you will find that your receiver sensitivity is already limited by the noise floor, hence there is no improvement possible by adding a preamp. 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] VHF preamps
Joel Mele wrote: Hello To All: Does any one have suggestions for a repeater preamp. 160 Mhz Rcv range and 153 Mhz Xmit range. I 'd like to find a unit with about 6-9dB gain, possibly with a preselector. I am trying to stay away from the Adance Receiver Research type that runs "wide open" with 24+ dB of gain. Thanks...Joel W4SLH Might I suggest a Motorola Micor VHF preamp. It has two sections of HR ahead of the FET. Provides about 10 dB of power gain and about 6 to 9 dB of actual improvement depending on how good your receiver is already. I have one I'd consider selling. Email me off list. Kevin Custer Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] VHF preamps
Joel, It is not a simple task to properly apply a preamp at VHF. There's a lot of noise in the VHF band, not just from man-made sources, but also from Mother Earth and the sky. This noise pickup is often made worse when vertically polarized omnidirectional antennas are used. Almost all manufacturers of preamps strongly recommend the installation of at least two bandpass cavity filters after the duplexer and before the preamp. The technology used in the preamp (GaAsFET or bipolar) should be based upon the site noise level, vulnerability to lightning strikes, and the presence of nearby transmitters. It can be a real challenge to increase the sensitivity of a VHF repeater, when there is a paging transmitter running more than a kilowatt just 150 kHz away! Too much gain in a VHF preamp is not always a good thing. It is sometimes necessary to add a 3 or 6 dB attenuator on the output of the preamp to avoid overloading the radio's front end. The amount of gain needed should be based upon a careful analysis of the site noise level and spectrum. I happen to prefer Angle Linear preamps, and have always had good luck with them. Chip Angle has some very informative application notes on his Web site: http://www.anglelinear.com/repeaters/repeaters.html 73, Eric Lemmon WB6FLY Joel Mele wrote: > Hello To All: Does any one have suggestions for a repeater preamp. > 160 Mhz Rcv range and 153 Mhz Xmit range. I 'd like to find a unit > with about 6-9dB gain, possibly with a preselector. I am trying to > stay away from the Adance Receiver Research type that runs "wide open" > with 24+ dB of gain. Thanks...Joel W4SLH > > > > > > > --- > Yahoo! Groups Links > >* To visit your group on the web, go to: > http://groups.yahoo.com/group/Repeater-Builder/ > >* To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > >* Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service. > 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: VHF preamps
The higher gain is associated with a GaAsFet preamp, not a DGFet or Bipolar preamp. ARR Makes both. Angle linear doesn't make a Phempt (GaAsFet type device) on VHF. For the lower gain, you can get one from both the above sources. Since I prefer the lower noise, higher gain GaAsFet operation at VHF, I have to use ARR or another source to fill the same requirement mentioned below. (Some claim the GaAsFet is overkill at VHF, I don't.) If your gain requirement is less, use the other type preamp, but also know the noise level is quite a bit higher. Here's a quick reference sheet. http://www.advancedreceiver.com/page3.html cheers, skipp > "Joel Mele" <[EMAIL PROTECTED]> wrote: > Hello To All: > > Does any one have suggestions for a repeater preamp.160 Mhz Rcv range and 153 Mhz Xmit range. > > I 'd like to find a unit with about 6-9dB gain, possibly with a preselector. > > I am trying to stay away from the Adance Receiver Research type that runs "wide open" with 24+ dB of gain. > > Thanks...Joel W4SLH 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: Kenwood TKR-820 UHF
Hi David, There is time out timer, tail time and audio/tone level adjustments right on the repeater board. You could try no pl in the decode slot of the programing information and the desired signaling in the tx side. If you were using an external controller, tx signaling (sub tone or dcs) is simply set up as base station operation. You can email me direct if you need more detailed information. I'm an Authorized Kenwood Dealer. cheers, Skipp skipp025 at yahoo.com > "drwoolweaver" <[EMAIL PROTECTED]> wrote: > > I recently acquired a TKR-820. Is it possible to program repeater to > encode on COS? Is there a time out timer adjustment? I saw a note > about time out alarm, but nothing about timer adjustment. Thanks in > advance. David 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] DB-420B Side Mounting
for many years (12) I had a 420 on the top on a 78 foot tower in Florida the tower had 3 sets of guys cables on it.. it made it thought all the storms we for here but no ice as Florida has none. Just lots of wind. The worst all the lighting the tower had hit it in all the years it was up. But the 420 made it thought it all, is now on a tower up north and still working. John - Original Message - From: "Stewart Rabinowitz" <[EMAIL PROTECTED]> To: Sent: Friday, April 08, 2005 10:46 PM Subject: [Repeater-Builder] DB-420B Side Mounting > > > Hi, all. > > I have a Rohn 45G tower and a Rohn's Universal Sidearm Mount presently > configured with several antennas. I want to rearrange the antennas and > mount the DB-420 for my repeater using the Rohn universal sidearm mount. > > I want to use the universal sidearm to bottom and mid-mount the DB420 > (the heavy, bottom half of the antenna)near the top of the tower to gain > additional at the expense of a lower wind rating. The alternative is to > bottom and top side mount the DB420 using the universal sidearm, but > lower on the tower. The height difference either way is less than 10' > but the tower is under 80' tall so the 10' can make a difference. > > I am in a 70 mph county in North Texas where we get severe weather each > Spring. My question: Would the DB-420 be secure enough bottom and > mid-mounted on the sidearm for additional height? Or is it better to > bottom and top mount the DB420 with lower height but greater wind rating? > > Suggestions? > > > Thanks > > Stewart > > > > > > > > > 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] VHF preamps
we have used both the UHF and VHF models form TX-RX and am very happy with them - Original Message - From: Steven Passmore To: Repeater-Builder@yahoogroups.com Sent: Saturday, April 09, 2005 5:28 AM Subject: Re: [Repeater-Builder] VHF preamps I have no personal experience with them but have talked to people that have had good experiences with LNA technology preamps http://www.lnatechnology.com/ Just today I ordered a 160Mhz preamp from Angle Linear, www.anglelinear.com I've read in this forum rave reviews of Chip's preamps. Although some people here consider his UHF preamps to be great but prefer other designs for VHF. Steve - Original Message - From: Joel Mele To: Repeater-Builder@yahoogroups.com Sent: Saturday, April 09, 2005 2:00 AM Subject: [Repeater-Builder] VHF preamps Hello To All: Does any one have suggestions for a repeater preamp. 160 Mhz Rcv range and 153 Mhz Xmit range. I 'd like to find a unit with about 6-9dB gain, possibly with a preselector. I am trying to stay away from the Adance Receiver Research type that runs "wide open" with 24+ dB of gain. Thanks...Joel W4SLH Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] astron rs50
At 09:01 AM 4/9/2005, John J. Riddell wrote: >I'd agree with Royce, W3IF. I too had a power supply across my >battery bank for my >sump pump. It was a really nice Hewlett-Packard 6264B adjustable 0 - >20 volts @ 20 amps. > >One day after switching off the AC, the power supply started to smoke ! > >Upon investigation, it was repairable since only a 5 watt resistor >burned up in the >crowbar circuit. I soon added a large diode in series with this >supply in the positive >lead feeding the battery bank. Now think about that for a minute. The supply is designed to output 20V, yet it's crowbar triggered on 14.5V? Something else went wrong there, you had some transient on the bus. >Never again will I use a power supply directly across batteries >without a series diode. Well, I agree the crowbar needs to be set to something reasonable, and have enough delay to allow for switching noise not to trigger it. The diode is fine by me, but I wouldn't give up the fuse. I would also move the voltage regulation input to the battery, and let the supply remote sense it, rather than dialing it out. You loose load regulation that way. 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] astron rs50
I'd agree with Royce, W3IF. I too had a power supply across my battery bank for my sump pump. It was a really nice Hewlett-Packard 6264B adjustable 0 - 20 volts @ 20 amps. One day after switching off the AC, the power supply started to smoke ! Upon investigation, it was repairable since only a 5 watt resistor burned up in the crowbar circuit. I soon added a large diode in series with this supply in the positive lead feeding the battery bank. Never again will I use a power supply directly across batteries without a series diode. John VE3AMZ - Original Message - From: "Dave VanHorn" <[EMAIL PROTECTED]> To: ; Sent: Saturday, April 09, 2005 9:43 AM Subject: Re: [Repeater-Builder] astron rs50 > > > > > >Better use an isolation diode... > >The linear Astron supplies I have worked on have a "crowbar" > >on the output. If it fires, it will foldback the supply causing no problem, > >but also put a dead short across the battery!! Not cool.. > >Royce - W3IF > > The crowbar would then pop the fuse that I put at the battery.. > > I guess I'm overly conservative, but I'm using #8 wire fused at 30A > (aka "aw shit fuses") between the battery and the charger, and the > battery and the system. These fuses are located right at the B+ > terminal. On the other end of the battery cable, there's a breakout > that has six taps with fuses sized per the loads. The basic rule is > that the wire has to be rated for continuous current at the fuse rating. > > Spare fuses in the cabinet of course. > > > > > > > > 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] astron rs50
> >Better use an isolation diode... >The linear Astron supplies I have worked on have a "crowbar" >on the output. If it fires, it will foldback the supply causing no problem, >but also put a dead short across the battery!! Not cool.. >Royce - W3IF The crowbar would then pop the fuse that I put at the battery.. I guess I'm overly conservative, but I'm using #8 wire fused at 30A (aka "aw shit fuses") between the battery and the charger, and the battery and the system. These fuses are located right at the B+ terminal. On the other end of the battery cable, there's a breakout that has six taps with fuses sized per the loads. The basic rule is that the wire has to be rated for continuous current at the fuse rating. Spare fuses in the cabinet of course. 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] GLB Part
I have a GLB Preselector-Preamp in my hands right now and it is an MRF901 transistor. Kevin, you are correct. Photos available for those who don't believe. ;-) I have several of these in 2 meter and 222Mhz versions and use them to either fix or prove many problems. They will fix a multitude of sins, but not on-frequency interference. Right now, I just happen to have one apart to change the connectors to N type for a project. The model number sometimes will tell you what it originally was used for. Mine is a P-147.49MHZ, I used it on a special project I did years ago. I had a wide split 2 meter repeater that used duplexers that were meant for a 5Mhz split. The GLB gave me enough isolation to do a 2MHZ split with low power. I still have the original catalog, it states that the GaAS fet option was available in VHF&UHF versions. I believe that all of mine were BiPolar versions, I think the "P" at the beginning of the model name denoted that. I still have documentation and catalogs, but no schematics. They were never available. The documentation was just sales info and specifications. 73, Joe, K1ike At 08:42 PM 4/8/2005 -0400, you wrote: >Remember, the GaAs FET option was only available on models over 200 MHz. >I'm sure the part is a Motorola MRF901, but I'll look some more to be >absolutely certain. >Unfortunately, not much information accompanied a new Preselector/Preamp, >and I can't even find what did come with the several I purchased over the >years. > >Kevin Custer 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] VHF preamps
I have no personal experience with them but have talked to people that have had good experiences with LNA technology preamps http://www.lnatechnology.com/ Just today I ordered a 160Mhz preamp from Angle Linear, www.anglelinear.com I've read in this forum rave reviews of Chip's preamps. Although some people here consider his UHF preamps to be great but prefer other designs for VHF. Steve - Original Message - From: Joel Mele To: Repeater-Builder@yahoogroups.com Sent: Saturday, April 09, 2005 2:00 AM Subject: [Repeater-Builder] VHF preamps Hello To All: Does any one have suggestions for a repeater preamp. 160 Mhz Rcv range and 153 Mhz Xmit range. I 'd like to find a unit with about 6-9dB gain, possibly with a preselector. I am trying to stay away from the Adance Receiver Research type that runs "wide open" with 24+ dB of gain. Thanks...Joel W4SLH Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Repeater-Builder] VHF preamps
Hello To All: Does any one have suggestions for a repeater preamp. 160 Mhz Rcv range and 153 Mhz Xmit range. I 'd like to find a unit with about 6-9dB gain, possibly with a preselector. I am trying to stay away from the Adance Receiver Research type that runs "wide open" with 24+ dB of gain. Thanks...Joel W4SLH Yahoo! Groups Links To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/ To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
