Re: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK
Hi George, If you don't mind going to the trouble, that would be great. Just verifying if the pin number/functions are the same as the Moxy would be good because I already have the Moxy pinout. 73 Jeff KP3FT --- On Wed, 9/8/10, George Henry wrote: From: George Henry Subject: Re: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK To: Repeater-Builder@yahoogroups.com Date: Wednesday, September 8, 2010, 7:45 PM I think I have a Maxar 80 manual at the office... I will check tomorrow morning. I think the only real difference in the connectors is that the Maxar 80 connector has 2 large pins at the top for power, while the Moxy has all pins the same size, and uses the first 2 in the 2nd row for power. All the metering, audio, and PTT pins are the same... I *THINK*... - Original Message - From: "Jeff KP3FT" To: Sent: Wednesday, September 08, 2010 2:53 PM Subject: Re: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK Hi George, Thanks for the reply. I had downloaded the diagram for the Moxy earlier from that website, but discovered the connector is different for the Maxar 80. Not sure if the pinout #s are the same though. I could spend the money and get a manual, but that is another 20 dollars and more time, plus I don't think I need much information really, since the new target frequency is not much higher than the original frequency and may not need retuning. It's for a beacon transmitter, so RX tuning isn't necessary. Jeff KP3FT --- On Wed, 9/8/10, George Henry wrote: From: George Henry Subject: Re: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK To: Repeater-Builder@yahoogroups.com Date: Wednesday, September 8, 2010, 3:40 PM I know that they are available on the Batlabs site... try http://www.batlabs.com/nosynth.html and scroll down to the Moxy section. I believe that the pinouts for the Maxar, Maxar 80, and Moxy were all the same. George, KA3HSW / WQGJ > >From: KP3FT >To: Repeater-Builder@yahoogroups.com >Sent: Wed, September 8, 2010 1:58:15 PM >Subject: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, >D51TSA4000BK > > >Hi all, >Does anyone have a scanned schematic and/or a pinout diagram for a Maxar 80 >lowband? I moving one that is presently at 49.520 MHz, up to 50.065 MHz, >but >have no idea what the pins are for PTT, etc. There is no microphone or >other >cables that came with the radio. Thanks for any help. >Jeff KP3FT >
Re: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK
Hi George, Thanks for the reply. I had downloaded the diagram for the Moxy earlier from that website, but discovered the connector is different for the Maxar 80. Not sure if the pinout #s are the same though. I could spend the money and get a manual, but that is another 20 dollars and more time, plus I don't think I need much information really, since the new target frequency is not much higher than the original frequency and may not need retuning. It's for a beacon transmitter, so RX tuning isn't necessary. Jeff KP3FT --- On Wed, 9/8/10, George Henry wrote: From: George Henry Subject: Re: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK To: Repeater-Builder@yahoogroups.com Date: Wednesday, September 8, 2010, 3:40 PM I know that they are available on the Batlabs site... try http://www.batlabs.com/nosynth.html and scroll down to the Moxy section. I believe that the pinouts for the Maxar, Maxar 80, and Moxy were all the same. George, KA3HSW / WQGJ > >From: KP3FT >To: Repeater-Builder@yahoogroups.com >Sent: Wed, September 8, 2010 1:58:15 PM >Subject: [Repeater-Builder] schematic and/or pinout diagram, Maxar 80, >D51TSA4000BK > > >Hi all, >Does anyone have a scanned schematic and/or a pinout diagram for a Maxar 80 >lowband? I moving one that is presently at 49.520 MHz, up to 50.065 MHz, but >have no idea what the pins are for PTT, etc. There is no microphone or other >cables that came with the radio. Thanks for any help. >Jeff KP3FT >
[Repeater-Builder] schematic and/or pinout diagram, Maxar 80, D51TSA4000BK
Hi all, Does anyone have a scanned schematic and/or a pinout diagram for a Maxar 80 lowband? I moving one that is presently at 49.520 MHz, up to 50.065 MHz, but have no idea what the pins are for PTT, etc. There is no microphone or other cables that came with the radio. Thanks for any help. Jeff KP3FT
[Repeater-Builder] Mitrek lowband PTT questions
Hi all, Thanks for the previous advice on the Mitrek lockout key; I ordered one off Ebay and it worked fine. Opened the radio up and everything looks visually OK, all the channel elements are there, no burned components, etc. I read through the Repeater-Builder's Mitrek webpages and figured out the pins for hookup. I was wondering if anyone could look over some sections of the Mitrek schematic <http://groups.yahoo.com/group/Repeater-Builder/files/Mitrek%20Lowband/> I posted in the Files section under the folder "Mitrek Lowband", regarding the PTT circuit. I circled the areas in question in red and blue. (I also hyperlinked to the various schematic sections in this message). I just want some verification before I start wiring up the radio. I found another website where the author said to jumper pin #1 to pin #25 on the interconnect board connection <http://f1.grp.yahoofs.com/v1/wBWDTM_dzohoZJ1M25svBvhmyUk3YStFZKcbHdVjzc\ HCTQSgFE9U0-wFOU3PHUQL3NIWEGUG1ndFPkhYrLdul9o1/Mitrek%20Lowband/intercon\ nect_board.jpg> , and then just ground pin #13 of the cable connector (or pin #13 on the front of the radio in my case) for PTT operation. (Pin #24 of the interconnect board connector is the same as pin #13 of the cable connector) My questions are: 1. What does the jumper do and is it beneficial for beacon operation? Here is the schematic section <http://f1.grp.yahoofs.com/v1/wBWDTDg1U9VoZJ1MJmrSx6917ZszwfFtwKxh8c5tPr\ Kp1IiKeb_dd_z6o52LjBRH6eMjcKXGvRCwASnBIgIJ8PUE/Mitrek%20Lowband/mitrek_P\ TT.jpg> of the PTT circuit. 2. I will be using the Mitrek solely as a transmitter beacon, so RX is not necessary. I'll have to disable the antenna relay <http://f1.grp.yahoofs.com/v1/wBWDTJ0GE-FoZJ1MoIPDEYBXLqbbFZph6Eymc3u9dF\ QYPG2vhGbVYg92QCtUhDuNVVr89_tTKgsBysS0H3B3Q5eW/Mitrek%20Lowband/Antenna_\ Relay.jpg> because it won't last long during constant beacon operation, plus it isn't even needed. Can I just disable the relay by cutting power to it and wire the PA output directly to the antenna jack (two points circled in blue)? Or, just keep voltage on the relay so the RX section is always switched out and the TX switched in? Probably easier that way. 3. The radio has the PL board installed; can I just remove it so it doesn't introduce anything into the carrier, or just leave it alone? I can't tell from reading through the various websites and the schematic if the PL-encode is enabled automatically or if it needs switching on, in which case I will leave it off. Thanks for any advice. Jeff KP3FT
Re: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek?
Hi Mike, Thanks for the links. The second link was in fact the first webpage I read and bookmarked yesterday. Ton of good info, plus I found a PDF service manual online. The keys page link didn't work, and then I ran across this Yahoo group so I joined to get advice. Still have some questions on bypassing the antenna RX/TX relay, but will cross that bridge when I get the top cover off and get it to transmit. --- On Sun, 8/29/10, Mike Morris wrote: From: Mike Morris Subject: Re: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek? To: Repeater-Builder@yahoogroups.com Date: Sunday, August 29, 2010, 6:46 PM At 09:09 AM 08/29/10, you wrote: >Hi, >I know it's a dumb question, but after scouring the internet for >info, I find everything about locks and replacement keys for >Motorolas and other radios, but I still don't know what locking the >Mitrek actually does. Does it kill all power to the radio, or >disable certain functions? I'm asking because I just acquired a >low-band Mitrek that I need to power up and verify its working >condition. It doesn't have a control head, so I need to use the >front panel pins, but if the radio is locked, I may end up getting >nowhere and still not know if it's either the radio that is bad, it >is locked out, or I wired it wrong. This is the first Mitrek I've >had. Thanks for any help. >Jeff KP3FT <http://www.repeater-builder.com/keyspage/keyspage-index.html> Please don't solder to the front connector pins. Get hold of a matching connector and solder to that. Please go to this web page at <http://www.repeater-builder.com/mitrek/mitrek-index.html> and scroll down to the Low Band section and read the articles on 6m mods. Then scroll down to the "Non-RF" section and read the two articles titled "Interfacing the Mitrek mobile radio to your repeater controller" and "Karl AK2O and the Spokane Repeater Group have a different take on converting the Mitrek". Both have good info on interfacing (i.e. connecting to the radio) and mounting/cooling. Mike WA6ILQ
RE: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek?
Hi, I tried that with the Maxtrac, kept the oscillator on and keyed the TX at the second driver stage, but it was still nowhere close. I know the Maxars are used quite a lot for beacons, but I've had no luck finding one at a reasonable price, so figure to try the Mitrek. It's set now at 49.3 MHz, so it's already not far from the beacon subband. --- On Sun, 8/29/10, Jeff DePolo wrote: From: Jeff DePolo Subject: RE: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek? To: Repeater-Builder@yahoogroups.com Date: Sunday, August 29, 2010, 3:48 PM I'm assuming this is a CW beacon? I would think that whether rockbound or synthesized, you'd probably be best off having the oscillator running all the time and keying RF at a gain or multiplier stage. You might have to do some keying waveform shaping to avoid "keyclicks". I'd take a real close look at the output spectra with something capable of catching transients or any spurs that occur during the keying ramps; maybe key it on/off at a rapid rate repeatedly while doing a peak-hold with the SA for a few minutes to look for any anomalies as a first pass. --- Jeff WN3A > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff KP3FT > Sent: Sunday, August 29, 2010 1:16 PM > To: Repeater-Builder@yahoogroups.com > Subject: RE: [Repeater-Builder] dumb question: what is > purpose of lock on Mitrek? > > > > Thanks guys. Looks like this radio might work; need > something for a 6-meter beacon transmitter. Tried a Mocom > but it wasn't functional. Tried a Maxtrac but the carrier > was really squirrely even when I tried the various mods, must > be due to the PLL instead of crystal-control. Have to see > how the carrier sounds on the Mitrek; if it's good I'll have > one of the TX channel elements re-crystalled. Been trying to > get something for a 6-meter beacon that doesn't cost a > fortune, on and off for the past few years between other > projects, and finding it a lot more difficult than it was > finding a suitable 10-meter beacon transmitter! Learning a > lot in the process though, that's a good thing... > 73 > Jeff KP3FT > > --- On Sun, 8/29/10, Eric Lemmon wrote: > > > > From: Eric Lemmon > Subject: RE: [Repeater-Builder] dumb question: what is > purpose of lock on Mitrek? > To: Repeater-Builder@yahoogroups.com > Date: Sunday, August 29, 2010, 12:56 PM > > > > > Jeff, > > The reason that most trunk-mount radios are locked is > to prevent theft and > tampering. The lock has no electrical function. You > will need the > ubiquitous #2135 key to unlock your Mitrek drawer. You > definitely want to > open up the radio before applying power to it, so that > you can ascertain if > the channel elements are in place, and what optional > components are > installed. Since Motorola shipped two keys with every > radio sold, most > radio shops will have a drawer full of #2135 keys. If > you ask, you will > likely get one or two free. > > 73, Eric Lemmon WB6FLY > > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of KP3FT > Sent: Sunday, August 29, 2010 9:09 AM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] dumb question: what is > purpose of lock on > Mitrek? > > Hi, > I know it's a dumb question, but after scouring the > internet for info, I > find everything about locks and replacement keys for > Motorolas and other > radios, but I still don't know what locking the Mitrek > actually does. Does > it kill all power to the radio, or disable certain > functions? I'm asking > because I just acquired a low-band Mitrek that I need > to power up and verify > its working condition. It doesn't have a control head, > so I need to use the > front panel pins, but if the radio is locked, I may end > up getting nowhere > and still not know if it's either the radio that is > bad, it is locked out, > or I wired it wrong. This is the first Mitrek I've had. > Thanks for any help. > Jeff KP3FT > > > > > >
RE: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek?
Thanks guys. Looks like this radio might work; need something for a 6-meter beacon transmitter. Tried a Mocom but it wasn't functional. Tried a Maxtrac but the carrier was really squirrely even when I tried the various mods, must be due to the PLL instead of crystal-control. Have to see how the carrier sounds on the Mitrek; if it's good I'll have one of the TX channel elements re-crystalled. Been trying to get something for a 6-meter beacon that doesn't cost a fortune, on and off for the past few years between other projects, and finding it a lot more difficult than it was finding a suitable 10-meter beacon transmitter! Learning a lot in the process though, that's a good thing... 73 Jeff KP3FT --- On Sun, 8/29/10, Eric Lemmon wrote: From: Eric Lemmon Subject: RE: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek? To: Repeater-Builder@yahoogroups.com Date: Sunday, August 29, 2010, 12:56 PM Jeff, The reason that most trunk-mount radios are locked is to prevent theft and tampering. The lock has no electrical function. You will need the ubiquitous #2135 key to unlock your Mitrek drawer. You definitely want to open up the radio before applying power to it, so that you can ascertain if the channel elements are in place, and what optional components are installed. Since Motorola shipped two keys with every radio sold, most radio shops will have a drawer full of #2135 keys. If you ask, you will likely get one or two free. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of KP3FT Sent: Sunday, August 29, 2010 9:09 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] dumb question: what is purpose of lock on Mitrek? Hi, I know it's a dumb question, but after scouring the internet for info, I find everything about locks and replacement keys for Motorolas and other radios, but I still don't know what locking the Mitrek actually does. Does it kill all power to the radio, or disable certain functions? I'm asking because I just acquired a low-band Mitrek that I need to power up and verify its working condition. It doesn't have a control head, so I need to use the front panel pins, but if the radio is locked, I may end up getting nowhere and still not know if it's either the radio that is bad, it is locked out, or I wired it wrong. This is the first Mitrek I've had. Thanks for any help. Jeff KP3FT
[Repeater-Builder] dumb question: what is purpose of lock on Mitrek?
Hi, I know it's a dumb question, but after scouring the internet for info, I find everything about locks and replacement keys for Motorolas and other radios, but I still don't know what locking the Mitrek actually does. Does it kill all power to the radio, or disable certain functions? I'm asking because I just acquired a low-band Mitrek that I need to power up and verify its working condition. It doesn't have a control head, so I need to use the front panel pins, but if the radio is locked, I may end up getting nowhere and still not know if it's either the radio that is bad, it is locked out, or I wired it wrong. This is the first Mitrek I've had. Thanks for any help. Jeff KP3FT
[Repeater-Builder] simple lowband rig needed, Maxar, Moxy, etc.
Hi all, Tnx for the previous replies to my xtal calculation question regarding the Maxar 80. Unfortunately, the rig I was getting was grsbbed by someone else, so I am still looking for a Maxar, Moxy or any other high-split radio that will get me on 50.063 Mhz with the least amount of cost or trouble. It's for a beacon project, so receive capability is not needed, only transmit. Does anyone have anything for sale that would work? Is there any other rig that will work, that can be made to transmit on an "odd" frequency (it's for a beacon, so a frequency that is not on an "even" 5 or 0 would be good, for example 50.063 instead of 50.060 or 50.065)? Can the newer programmable rigs be "tweaked" to transmit off-frequency slightly? I was able to trim a can in the oscillator section of my Kenwood 2-meter FM-only rig to transmit anywhere in between "even" frequencies; just wondering if the programmable commercial rigs would do the same. That way I wouldn't need to get a crystal-bound rig. Thanks and 73! Jeff KP3FT
[Repeater-Builder] Maxar 80 lowband transmit crystal frequency calculation needed
Hi all, I'm buying a Maxar 80 low-band radio, 42-50 Mhz split, D51TSA2300AK, but I need to figure out what frequency to get the new crsytal cut for. I am wanting the radio to transmit on 50.063 mhz. The recieve crystal is not necessary since it will be used as a 6-meter beacon transmitter only. What is the formula for calculating the frequency? Thanks! Jeff KP3FT
