RE: [Repeater-Builder] Re: Astron Supply Help
Radio Shack sells it. Richard, N7TGB -Original Message- From: Mike WA6ILQ [mailto:[EMAIL PROTECTED] Sent: Thursday, September 02, 2004 12:07 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Astron Supply Help At 08:40 AM 9/2/04, Tedd Doda, VE3TJD wrote: >On Thu, 02 Sep 2004 11:35:29 -0400, Jim B. wrote: > > >umm-heat sink "grease" (thermal compound) is not clear. > >It can be. The common stuff is white, but I've seen >the clear variation on lots of industrial equipment >(DC-DC motor controllers for example) used for their >FET's and SCR's. Do you, by chance, have a manufacturer's name? product info (i.e. product name, part number)? Is one known to work better then the other? Mike WA6ILQ 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] antenna ice protection
I wondered if this group has any opinions on the need for ice breakers or ice shields. Currently our DB224E's are at 1340 Ft and mounted about 6" off the leg of the 1400 ft tower. We have not had any problems from falling ice at this level over the past 10 years. We have been asked to move down to 1240 ft to make way for DTV antennas and one of our antenna's will be lower at 1100 ft. One of the club members suggested that going to the lower height significantly increases the risk of damage from falling ice even with the very close spacing to the tower leg which we plan to continue with at the new height. Question is should we try to obtain some ice breakers and install them above the antennas to protect from falling ice? John Lock KF0MWichita KS kf0m at arrl dot net 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] antenna ice protection
I wondered if this group has any opinions on the need for ice breakers or ice shields. Currently our DB224E's are at 1340 Ft and mounted about 6" off the leg of the 1400 ft tower. We have not had any problems from falling ice at this level over the past 10 years. We have been asked to move down to 1240 ft to make way for DTV antennas and one of our antenna's will be lower at 1100 ft. One of the club members suggested that going to the lower height significantly increases the risk of damage from falling ice even with the very close spacing to the tower leg which we plan to continue with at the new height. Question is should we try to obtain some ice breakers and install them above the antennas to protect from falling ice? John Lock KF0M Wichita KS kf0m at arrl dot net 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] antenna ice protection
John, One of the best sources of information on this topic is the manufacturer of the antenna. Give Decibel Products a call at 800-676-5342 or online at www.decibelproducts.com 73, Eric Lemmon WB6FLY kf0m wrote: > I wondered if this group has any opinions on the need for ice breakers or ice shields. Currently our DB224E's are at 1340 Ft and mounted about 6" off the leg of the 1400 ft tower. We have not had any problems from falling ice at this level over the past 10 years. > We have been asked to move down to 1240 ft to make way for DTV antennas and one of our antenna's will be lower at 1100 ft. One of the club members suggested that going to the lower height significantly increases the risk of damage from falling ice even with the very close spacing to the tower leg which we plan to continue with at the new height. > Question is should we try to obtain some ice breakers and install them above the antennas to protect from falling ice? > > John Lock KF0M > Wichita KS > kf0m at arrl dot net > > > 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] UHF GM300 (lnk radio)
I would like to use a UHF GM300 as a link radio for my system. However, 25 watts is a bit overkill for my application. Has anyone had any luck with reducing the power on one of the radios? I would assume that one could disable the amplifier and use just the exciter, but I am not sure of the procedure. Anyone care to share? Thanks Steaven, W4YI 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: Astron Supply Help
At 04:15 PM 9/2/04, Steve wrote: >I remember buying some stuff at an auto parts store a few years back >that was clear and used for automotive distributor caps and such. I >can't remember if it was silicone based stuff or not. That was probably silicone dielectric grease. Good electrical insulator, I don't know its heat transfer properties but I'd bet they aren't very good. Roger Grady K9OPO 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] Tone bd and controller design data
Looking for any archives on tone board and controller design? de Ev WA6CRE 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] Repeater for a emergency HAM Clup TA2KT
Dear Sirs,We are a Emergency Radio Amateur Club based in Istanbul...Turkey... We need very urgently 2 meters repeater for Istanbul... Can you pls inform me if you have a repeater ( New / used one ) that you can send to us... If you have some pls send me all the details... Hoope to hear you soon... Best regards 73! de TA0U Urcun CANEL__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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] antenna ice protection
MTS make a real nice ice breaker that works very well. We have two sites that we use them on. 73 Russ, - Original Message - From: "kf0m" <[EMAIL PROTECTED]> To: Sent: Thursday, September 02, 2004 10:26 PM Subject: [Repeater-Builder] antenna ice protection > I wondered if this group has any opinions on the need for ice breakers or > ice shields. Currently our DB224E's are at 1340 Ft and mounted about 6" off > the leg of the 1400 ft tower. We have not had any problems from falling ice > at this level over the past 10 years. > > We have been asked to move down to 1240 ft to make way for DTV antennas and > one of our antenna's will be lower at 1100 ft. One of the club members > suggested that going to the lower height significantly increases the risk of > damage from falling ice even with the very close spacing to the tower leg > which we plan to continue with at the new height. > > Question is should we try to obtain some ice breakers and install them above > the antennas to protect from falling ice? > > > > John Lock KF0M > Wichita KS > kf0m at arrl dot net > > > > > > > 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: Astron Supply Help
On Thu, 02 Sep 2004 12:06:51 -0700, Mike WA6ILQ wrote: >Do you, by chance, have a manufacturer's name? >product info (i.e. product name, part number)? >Is one known to work better then the other? Sorry, I don't. I always replace it with the white stuff :) Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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] UHF GM300 (lnk radio)
25 Watt radios will turn down to at least 10 watts or less without any problems. If you want to use just the exciter (a few hundred milliwatts I think), you would probably want to make your own t/r switching and just connect directly to the RF board. Steaven Rogers, W4YI wrote: >I would like to use a UHF GM300 as a link radio for my system. However, >25 watts is a bit overkill for my application. Has anyone had any luck >with reducing the power on one of the radios? I would assume that one >could disable the amplifier and use just the exciter, but I am not sure >of the procedure. Anyone care to share? > >Thanks > >Steaven, W4YI > > > > > > > >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] UHF GM300 (lnk radio)
I have had luck programming them as low as 4 watts without them becoming dirty or unpredictable. Below that, I would start removing stages. Kevin Custer W3KKC Steaven Rogers, W4YI wrote: >I would like to use a UHF GM300 as a link radio for my system. However, >25 watts is a bit overkill for my application. Has anyone had any luck >with reducing the power on one of the radios? I would assume that one >could disable the amplifier and use just the exciter, but I am not sure >of the procedure. Anyone care to share? > 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] UHF GM300 (lnk radio)
It just unplugs. You will need a special cable to plug back into the circuit board to plumb the RF out to the outside world. It is a standard Mot part, but I do not know the part number. Get yourself a service manual, the part is listed in there... Good luck! Mike Steaven Rogers, W4YI wrote: > I would like to use a UHF GM300 as a link radio for my system. However, > 25 watts is a bit overkill for my application. Has anyone had any luck > with reducing the power on one of the radios? I would assume that one > could disable the amplifier and use just the exciter, but I am not sure > of the procedure. Anyone care to share? > > Thanks > > Steaven, W4YI > > > > > > > > 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: UHF GM300 (lnk radio)
I dont think the exciter puts out very much power. The manual states that the first of the 4 stages in the PA module puts out 300 mw and has a gain of 11.8 db. This would put the exciter output in the 20 mw range. --- In Repeater-Builder@yahoogroups.com, James <[EMAIL PROTECTED]> wrote: > 25 Watt radios will turn down to at least 10 watts or less without any > problems. If you want to use just the exciter (a few hundred milliwatts > I think), you would probably want to make your own t/r switching and > just connect directly to the RF board. > > Steaven Rogers, W4YI wrote: > > >I would like to use a UHF GM300 as a link radio for my system. However, > >25 watts is a bit overkill for my application. Has anyone had any luck > >with reducing the power on one of the radios? I would assume that one > >could disable the amplifier and use just the exciter, but I am not sure > >of the procedure. Anyone care to share? > > > >Thanks > > > >Steaven, W4YI > > > > > > > > > > > > > > > >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: (link radio) power level
> "Steaven Rogers, W4YI" <[EMAIL PROTECTED]> wrote: > I would like to use a UHF GM300 as a link > radio for my system. However, 25 watts is > a bit overkill for my application. Very true, I just shot a 48 mile link using .8 watt bare exciter boards and 5 element yagis. I wasn't sure the resultant shot would be clean and quiet, but it is. Doesn't take a lot of RF to make things happen well. cheers, skipp www.radiowrench.com I see yahoo will allow us to make these posts in various languages. Might be fun to throw out something non english to wake a few people up. :-) 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 MLS II alignment
I have a little remote link I'm working on, have 4 GE MLS II, UHF (MLSU241, pc programmable) I have the rib/cable/software, and can get the radio programmed, but need eithe a service manual /copy, or at least help with alignment. I did tweek one of the radio's tx vco adjusts by "feel" and got it to lock. Don't want to mess with the rest till I get alignment dope. Thanks, Delar, W7DJM fourfortyroadrunner (the at thing) yahoo.com 208 66 zero 65 zero zero 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: UHF GM300 (lnk radio)
Mike WA6ILQ > wrote: > Modifying a Maxtrac-family radio for low power out might > make a good article for repeater-builder. > Mike, You have NOT answered any of our e-mails. I sent you this very same information, along with other related info for the rptr builders site. The Maxtrac/Radius line had a LPI version in VHF and UHF, usally the 2 to 10 watt version. I have also seen a 1 to 6 watt UHF PA for them. The Mostar, and German Maxtrac have simmular PA stages. I have the schematics for the 2 to 10 watt versions. As Keven said here, removing a couple of stages by bypassing arround the driver and output stage is what is needed. The transmitter PA's get really hot even when "turned down" because the stages draw excess DC current. The transistors are not designed to run in that part of the curve, and become very in-effisient. MIKE, please meet me this week end at The Big Yard sale. 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] UHF GM300 (lnk radio)
I've not been inside one but I was told that the M-123 and the GM300 are a Maxtracs with new outer skins and different software. Maxtrac exciters are weak - less than 80mw if I remember correctly. I've seen 2w Maxtracs in surplus, in fact a couple sold on eBay a while back for around $50. You might be able to find a manual for the 2w radio and see how the designers did it, then copy the changes. Modifying a Maxtrac-family radio for low power out might make a good article for repeater-builder. Mike WA6ILQ At 05:25 AM 9/3/04, you wrote: >I have had luck programming them as low as 4 watts without them becoming >dirty or unpredictable. Below that, I would start removing stages. > >Kevin Custer W3KKC > >Steaven Rogers, W4YI wrote: > > >I would like to use a UHF GM300 as a link radio for my system. However, > >25 watts is a bit overkill for my application. Has anyone had any luck > >with reducing the power on one of the radios? I would assume that one > >could disable the amplifier and use just the exciter, but I am not sure > >of the procedure. Anyone care to share? > > > > > > > > >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] BIG Radio Equipment Yard Sale
Way more stuff that I have room here to post... This Yard Sale benifits a good cause, the San Gabriel Valley USAR Team which is also involved in disaster communications. Just added, 2) old style TU round UHF cavities, duplexer, and more. Two VHF P200 6ch. NEW still in the original boxes. One UHF P200 6Ch 4 watt, NEW Still in the original box. Sept 4th & 5th at 3133 San Leon, EL Monte, CA Just off the I 10 at Peck Road. Come on by and help support SGVUSAR Team < 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/
