Re: [Repeater-Builder] ge mastr uhf 100 watt pa burnout
Those loops as you refer to are actually inductors of a very small value. They are in all intent a passive component. The size and shape derives the inductance value. If you burned one out you were definately sinking some heavy current, check your output transistors as you prob cooked at least one. Check all bias resistors as well. Did you have the thing fused? --- On Wed, 11/25/09, ke5hbb ke5...@yahoo.com wrote: From: ke5hbb ke5...@yahoo.com Subject: [Repeater-Builder] ge mastr uhf 100 watt pa burnout To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 25, 2009, 11:53 PM To the group I am new at building ,with the help of a friend we put together a uhf mobil. at 45 watts out I had a problem with the pa . A small copper loop beside the power adjust pot. burned thru the board and took out a cap.I was able to get it back online but am worried about overheating . mobil units don`t have large heat sinks. What is the normal power setting? These small copper loops act as a jumper from one trace to another. What are the correct term for these loops? Dave 73
[Repeater-Builder] Re: Replacement regulator boards for Astron power supplies
Watching at the e-mail box . Is this like Charlie Brown downfield in the football game ... waiting for the football from the quarterback? ... there is a Santa Clause, there is a Santa Clause .. The Audacity of Capitalism at Christmas! g. beat w9gb
Re: [Repeater-Builder] ge mastr uhf 100 watt pa burnout
Yes Sir, I have it fused but when we first started we did not [just a short while] When I got a fuse holder and put a fuse in it a 15 amp it blew it right away. I had to go with a 20 is this a normal size for this machine --- On Sat, 11/28/09, kevin valentino kevinvalent...@sbcglobal.net wrote: From: kevin valentino kevinvalent...@sbcglobal.net Subject: Re: [Repeater-Builder] ge mastr uhf 100 watt pa burnout To: Repeater-Builder@yahoogroups.com Date: Saturday, November 28, 2009, 2:58 AM Those loops as you refer to are actually inductors of a very small value. They are in all intent a passive component. The size and shape derives the inductance value. If you burned one out you were definately sinking some heavy current, check your output transistors as you prob cooked at least one. Check all bias resistors as well. Did you have the thing fused? --- On Wed, 11/25/09, ke5hbb ke5...@yahoo.com wrote: From: ke5hbb ke5...@yahoo.com Subject: [Repeater-Builder] ge mastr uhf 100 watt pa burnout To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 25, 2009, 11:53 PM To the group I am new at building ,with the help of a friend we put together a uhf mobil. at 45 watts out I had a problem with the pa . A small copper loop beside the power adjust pot. burned thru the board and took out a cap.I was able to get it back online but am worried about overheating . mobil units don`t have large heat sinks. What is the normal power setting? These small copper loops act as a jumper from one trace to another. What are the correct term for these loops? Dave 73
Re: [Repeater-Builder] Midland 13-509
I think I still have the repeater conversion article from 220 Notes around here someplace. I did the conversion years ago for my first repeater and it worked quite well. I can try to dig it out if anyone is interested. 73, Joe, K1ike Gary wrote: The Midland 13-509 is spoken for. Thanks all, Gary *From:* Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Gary *Sent:* Friday, November 27, 2009 1:38 PM *To:* Repeater-Builder@yahoogroups.com *Subject:* [Repeater-Builder] Midland 13-509 There was a time when the ol’ Midland 13-509 mobiles made good radios from which to build a 220Mhz amateur repeater. I have a 13-509 for sale in excellent condition and in the original box. Included is the manual, mounting bracket, and mic. Has several pairs of crystals already installed. Asking $50 +s/h. If interested please email me direct (off the group). Gary N6LRV Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Re: The GLB Preselector- Preamplifier
I lived up in Rome NY for a couple of years when I was stationed at Griffiss Air Force Base. Six inches of snow only got a brief comment during the local weather cast. They considered it a dusting. 73, Joe, K1ike Chuck Kelsey wrote: Tonawanda doesn't get near as much snow as a bit further south - Chautauqua County. We had 295 here in Mayville last season. Chuck WB2EDV
[Repeater-Builder] New file uploaded to Repeater-Builder
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Repeater-Builder group. File: /GLB Preselector/GLB_Preselector.pdf Uploaded by : k1ike k1ike_m...@snet.net Description : GLB Preselector docs supplied with preamp You can access this file at the URL: http://groups.yahoo.com/group/Repeater-Builder/files/GLB%20Preselector/GLB_Preselector.pdf To learn more about file sharing for your group, please visit: http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles Regards, k1ike k1ike_m...@snet.net
Re: [Repeater-Builder] Re: GLB Preselector- Preamplifier Response Plot
As far as I know, GLB never made the schematic available. I posted to the FILES area what I received with the preamps that I had purchased over the years. I've used them on all three bands with good luck. Skipp was trying to reverse engineer one I sent him. 73, Joe, K1ike DCFluX wrote: Anyone have a schematic?
[Repeater-Builder] Re: GLB Preselector diagram and spicey (spice modeling)
I have that information and I did reverse out the diagram portions I was interested in detailing, which are the different bias schemes for the different active devices. I'll happily make that information available when I locate that buried folder. Today might be a day to slightly clean up the office paperwork stack. A friend and I are casually setting up to run models of both wide and narrow band RF Pre-amplifiers. The subject has already started an interesting email debate with another group of friends. The termination Z (impedance) actually seen by the preamplifier does affect the IMD. How much and where is what we hope to get a better look at. s. Joe k1ike_m...@... wrote: As far as I know, GLB never made the schematic available. I posted to the FILES area what I received with the preamps that I had purchased over the years. I've used them on all three bands with good luck. Skipp was trying to reverse engineer one I sent him.
Re: [Repeater-Builder] ge mastr uhf 100 watt pa burnout
On Nov 25, 2009, at 9:53 PM, ke5hbb wrote: To the group I am new at building ,with the help of a friend we put together a uhf mobil. at 45 watts out I had a problem with the pa . A small copper loop beside the power adjust pot. burned thru the board and took out a cap.I was able to get it back online but am worried about overheating . mobil units don`t have large heat sinks. What is the normal power setting? These small copper loops act as a jumper from one trace to another. What are the correct term for these loops? Dave 73 There were different sized PA's available in the mobiles. What's your combination number stamped on the front of the rig? That'll tell what it originally shipped from the factory as. Most were 100W, though. The failure at the jumpers between the boards is common if you're not driving the PA into a perfect 50 ohm load. The late model station (not mobile) PA's added a Z-matcher to the Low-Pass Filter section of the PA for this reason. Also, as someone else mentioned, those jumpers can act as inductors to some extent (although I disagree that they were intended to) and one of them burning up can be an indication that there's problems upstream on the high-power board. The fact that it burnt up makes me think you have at least the 100W NON-continuous-duty PA. Most of the others don't have enough oomph to fry that connection between the high-power board and the LPF. Most people install fans on the mobile version of the PA's heatsink when using them in repeater service. The GE MASTR II PA can become spurious at low power levels, starting somewhere USUALLY around half power and down. Your PA may have burnt up because of that also (it will draw INCREDIBLE amounts of current as it tries to put out 100W on/near your main frequency and spurs all up and down the band. Get a spectrum analyzer on it. Turn it up from 45W (usually we run our 100W PA's at 75% power or greater) and since it's a mobile, get fans on it so it'll stay cool. Also, I highly recommend a Z-matcher or better yet, and isolator on the output of MASTR II PA's. Give them a 50 ohm load and they'll usually run forever. And if you can, there's TONS of stations on the used market these days as Public Safety heads for narrowband and/or digital stuff. Take your exciter, receiver, and all the guts from that mobile that are already tuned up for your frequency and stuff 'em in a station/repeater chassis with a non-fried UHF PA, and you'll have years and years of service from it... -- Nate Duehr, WY0X n...@natetech.com facebook.com/denverpilot twitter.com/denverpilot
RE: [Repeater-Builder] ge mastr uhf 100 watt pa burnout
Dave, Please advise the part number of the PA board, usually stamped in black ink along one edge of the board. It's difficult for us to help you, if we don't know exactly which PA board you have. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of ke5hbb Sent: Wednesday, November 25, 2009 8:54 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ge mastr uhf 100 watt pa burnout To the group I am new at building ,with the help of a friend we put together a uhf mobil. at 45 watts out I had a problem with the pa . A small copper loop beside the power adjust pot. burned thru the board and took out a cap.I was able to get it back online but am worried about overheating . mobil units don`t have large heat sinks. What is the normal power setting? These small copper loops act as a jumper from one trace to another. What are the correct term for these loops? Dave 73
Re: [Repeater-Builder] Re: The GLB Preselector- Preamplifier - SNOW
Yep, pretty much a non-event. Chuck - Original Message - From: Joe k1ike_m...@snet.net To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 28, 2009 9:42 AM Subject: Re: [Repeater-Builder] Re: The GLB Preselector- Preamplifier I lived up in Rome NY for a couple of years when I was stationed at Griffiss Air Force Base. Six inches of snow only got a brief comment during the local weather cast. They considered it a dusting. 73, Joe, K1ike Chuck Kelsey wrote: Tonawanda doesn't get near as much snow as a bit further south - Chautauqua County. We had 295 here in Mayville last season. Chuck WB2EDV
Re: [Repeater-Builder] ge mastr uhf 100 watt pa burnout
He sent me the combo number off list. He has a standard UHF 100W mobile. On Nov 28, 2009, at 9:54 AM, Eric Lemmon wrote: Dave, Please advise the part number of the PA board, usually stamped in black ink along one edge of the board. It's difficult for us to help you, if we don't know exactly which PA board you have. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of ke5hbb Sent: Wednesday, November 25, 2009 8:54 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ge mastr uhf 100 watt pa burnout To the group I am new at building ,with the help of a friend we put together a uhf mobil. at 45 watts out I had a problem with the pa . A small copper loop beside the power adjust pot. burned thru the board and took out a cap.I was able to get it back online but am worried about overheating . mobil units don`t have large heat sinks. What is the normal power setting? These small copper loops act as a jumper from one trace to another. What are the correct term for these loops? Dave 73 Nate Duehr n...@natetech.com facebook.com/denverpilot twitter.com/denverpilot Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] ge mastr uhf 100 watt pa burnout
He sent me the board number off-list (19D423006G6), which is covered by LBI-30201, here: www.repeater-builder.com/ge/lbi-library/lbi-30201g.pdf Dave is operating the radio at 441.900 MHz. Dunno what mods have been made to optimize operation outside of the 450-470 MHz design band. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Nate Duehr Sent: Saturday, November 28, 2009 9:37 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] ge mastr uhf 100 watt pa burnout He sent me the combo number off list. He has a standard UHF 100W mobile. On Nov 28, 2009, at 9:54 AM, Eric Lemmon wrote: Dave, Please advise the part number of the PA board, usually stamped in black ink along one edge of the board. It's difficult for us to help you, if we don't know exactly which PA board you have. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of ke5hbb Sent: Wednesday, November 25, 2009 8:54 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ge mastr uhf 100 watt pa burnout To the group I am new at building ,with the help of a friend we put together a uhf mobil. at 45 watts out I had a problem with the pa . A small copper loop beside the power adjust pot. burned thru the board and took out a cap.I was able to get it back online but am worried about overheating . mobil units don`t have large heat sinks. What is the normal power setting? These small copper loops act as a jumper from one trace to another. What are the correct term for these loops? Dave 73 Nate Duehr n...@natetech.com facebook.com/denverpilot twitter.com/denverpilot Yahoo! Groups Links
Re: [Repeater-Builder] MASTR II pieces / parts
Need an Audio section of Master II, Please let me know how much is postage. Fred N2NSS (73) --- On Thu, 11/26/09, bil.isom bil.i...@yahoo.com wrote: From: bil.isom bil.i...@yahoo.com Subject: [Repeater-Builder] MASTR II pieces / parts To: Repeater-Builder@yahoogroups.com Date: Thursday, November 26, 2009, 3:19 PM I have recently received several partial Mastr II and Mastr IIe UHF remote stations. I do not need, and cannot use, all of the cards and parts in the units. If anyone needs a card or module, they are available for postage. Please only request one if you truely need it. Thank you Bill N4XIR
Re: [Repeater-Builder] Re: GLB Preselector diagram and spicey (spice modeling)
Input, output or both? Joe skipp025 wrote: The termination Z (impedance) actually seen by the preamplifier does affect the IMD. How much and where is what we hope to get a better look at. s.
Re: [Repeater-Builder] MASTR II pieces / parts
Might you have a new style control shelf ? manual for same ? Jerry W8KQ zip-49707 --- On Sat, 11/28/09, Fred Esteves estev...@yahoo.com wrote: From: Fred Esteves estev...@yahoo.com Subject: Re: [Repeater-Builder] MASTR II pieces / parts To: Repeater-Builder@yahoogroups.com Date: Saturday, November 28, 2009, 2:48 PM Need an Audio section of Master II, Please let me know how much is postage. Fred N2NSS (73) --- On Thu, 11/26/09, bil.isom bil.i...@yahoo. com wrote: From: bil.isom bil.i...@yahoo. com Subject: [Repeater-Builder] MASTR II pieces / parts To: Repeater-Builder@ yahoogroups. com Date: Thursday, November 26, 2009, 3:19 PM I have recently received several partial Mastr II and Mastr IIe UHF remote stations. I do not need, and cannot use, all of the cards and parts in the units. If anyone needs a card or module, they are available for postage. Please only request one if you truely need it. Thank you Bill N4XIR
[Repeater-Builder] Re: GLB Preselector diagram and spicey (spice modeling)
both... we already gone through some of it and sorting the results is a lot of work. s. Joe k1ike_m...@... wrote: Input, output or both? Joe skipp025 wrote: The termination Z (impedance) actually seen by the preamplifier does affect the IMD. How much and where is what we hope to get a better look at. s.
[Repeater-Builder] Motorola MSR2000 AVTEC card?
Hello, I have a card that came out of a VHF MSR2000. I can't seem to find any info on the card. Google, etc came up blank. Does anyone know of this card, whats it is used for or is it junk for HAM use? The only thing on the card that identifies it is printed to the left of the white T style handle. AVTEC DUAL PTT DECODER PCB# 1700-124-0003 REV C There are four test points on the front of the card. TP1 Bandpass out TP2 Notch Out TP3 PTT TP4 GND Hope I was able to describe this. Thanks -Jason
[Repeater-Builder] Re: Midland 13-509 Repeater
- Original Message - From: Joe I still have the repeater conversion article from 220 Notes. I did the conversion and it worked well. I can dig it out, if anyone is interested. = Hi, Joe ~ Yes, I'm very interested in that article. Please share it whenever you find it. Thanks and 73, Bil Seymour -- WA6MOD Everyone Follows the Bass Player http://www.qrz.com/db/wa6mod Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: repeater-builder-dig...@yahoogroups.com repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Used Cat-200 or Arcom anyone?
Hi, Putting up a UHF VXR-7000. I'll need a controller to allow DTMF remote operation and control, Anyone have a used one they might want to sell? Please email me offlist. mycalls...@earthlink.net. Thanks, Alan WA2AR
Re: [Repeater-Builder] MASTR II pieces / parts
Hi Bill, I'm looking for a pair of Audio/Squelch boards to get our UHF and a VHF machines back on the air... The 11.2Mhz variety. Got anything like this available?? Dave - N0TRQ On Thu, Nov 26, 2009 at 5:19 PM, bil.isom bil.i...@yahoo.com wrote: I have recently received several partial Mastr II and Mastr IIe UHF remote stations. I do not need, and cannot use, all of the cards and parts in the units. If anyone needs a card or module, they are available for postage. Please only request one if you truely need it. Thank you Bill N4XIR
[Repeater-Builder] Moving DB-224 to 220mhz
Hello all...wondering if anyone has sucessfully moved a VHF (150mhz) DB-224 to the 220mhz ham band? Anyone have pics or info on it? I have to measurements, just wondering if it has been done and worked? Thanks! Steve KD8BIW KD8BIW/R 224.580 PL 110.9 Widowville, OH
