Batboard

Doug

I maybe reaching here.... I bet your computer is 64 bit processor, I had issue with several different radios started running rss on a 32 bit and worked without fail
Doug

Doug

Is your heart set on using j14 or would you entertain the idea of using j17 ? I've done several Quantars using j17 This allowed the analog to be handled by your controller of choice and p25 to be done as an in cabinet repeat function handled by the wild cards. This also will do p25 linking via the C...

Doug

Directional......however their figures for gain and rejection seem inflated

Doug

As strange as this sounds.... because the quantro sort of mirrors the msf5000 perhaps you can find what your searching for over on Repeater- Builder site. Under the msf station there was a brief description on bypassing the station amplifiers and driving a after market stuff. I'm guessing it'll be a...

Doug

The easiest thing to check right off the bat.... Is it possible the pico fuse beneath your antenna input gone open? Look at all the variables first, cables, antenna input you get the idea

Doug

Read the station, go under service within the area there is an area for metering various stages. If memory serves me correct P.A. is the first screen..... Look across the top of the screen and there should be various modules you can switch to. Check receiver one. I had one failing because of low vol...

Doug

Bob, I did a setup for someone just recently with an MSF power amp. With the amplifier being non-linear it was interesting seeing the results. The setup was a standard 110 watt UHF amp. At 2.67 watts of drive it set the out put to 156 watts (no bueno) 2.53 watts drive set the output to 138 watts. Th...

Doug

Just an out load thought, Is using a back to back radio configuration really your best option? Two things come to mind right off the top the first thing is your going to be using a radio as a transmitter/exciter. Duty cycle is foremost, this is a crap shoot I know of people who have tried and had go...

Doug

The molex connector is specific to the msf. It contains forward and reversing voltages and drives the exciter accordingly. You will not need to attach it to anything. The output will be dependent on the exciter drive. Somewhere around 2-2.5 watts of drive should take it to full output power. I'm a b...

Doug

An easy way to check if its a controller issue is to remove the controller cabling read and change the codeplug to internal controller instead of the external Zetron.
Doug

Doug

Start here:
http://batlabs.com/gr400.html

Doug

"Station firmware was version 9 something and we had programmed with with RSS version 14 something, so we felt it was a good idea to update everything to the last and final version, which we did." Was the exciter firmware updated as well or just the SCM? Its funny this post should show up ...

Doug

Thank you for the info. I was doing a bit of familiarizing myself with it today and brought out a set of 4 cavity duplexers. It took a bit longer than usual with the tracking generator but the results were good. I put on my RLB and didn't miss it by much.
Doug

Doug

We'll, I did pull the trigger on it. It's going to take a bit of getting used to. It's got the tracking generator option/cable fault/swr . The cool thing is I was given a two week option on it if I don't like it.

Doug

I'm in a quest for a bit of information. It's time for me to replace my service monitor And I have an option to pick up a calibrated R-2590 for what seems to be a fair price. The problem lies in that the many searches on the net have led to little user opinion. Good /Bad or otherwise? Before asking ...

Doug

The tuning channel thing really isn't that important at this point. I would look closer at your injection filters or possibly the pre-selector. VHF stations pre-selectors are beneath the front panel
Doug

Doug

If you have a test set available, plug into the receiver (front panel left side) set your test set to meter position 3 (meter switch set to negative) what kind of micro amps are you seeing. It's been a while since I've done a VHF station, I seem to remember it should be between somewhere in the 24 t...

Doug

If your using an external controller and the mrti for your signals, is there a reason why repeater is in your ptt priority? You may have a specific reason I guess inquiring minds would like to know why. It almost sounds like one is competing with the other. Doug I just read your post again and to me...

Doug

Thanks Bob,
I even didn't think of the pre and post filters

Doug

The transmit from factory came out of the PA to a pass filter which ran across the back of the station. The pass filter was approx. 12" long double female "N" which is why there was only an 8" piece of feed line for the output of the station.
Doug

Doug

Steve,
Let me dig around in my storage Sunday I think I've got a couple manuals on the nucleus. No promises or guarantees
Doug

Doug

Just an FYI that is normal to hear the oscillation, many of us just move the idle frequency off just a bit to resolve it. The VCO's in a VHF station are software defined there are no adjustments they either lock or fail. Unfortunately these stations send out redundant audio alarms. They'll send the ...

Doug

It's going to a bit more difficult than just a simple patch cable. The biggest milestone I see is getting a low COR to key your transmitter. IIRC Your going to have to do some mods to the radio to even get a cor signal out. This held true with normal spectras maybe astro spectra are different. That ...

Doug

Hi Bob,
I can't help but to give you and repeater builder a shameless plug.
Doug

Doug

http://www.repeater-builder.com/motorola/msf/msf-clb-to-cxb.html Steve, Its a walk in the park, Its going to take you longer to remove the SSCB from the tray than it will be to add the 5 volts line across the bottom. After that go grab one of the def files and build a new codeplug, (I believe its Co...

Doug

The following link has the information that you need:
http://batlabs.com/gm900.html

Doug

Warm up your soldiering iron, one jump wire and changing a couple jumpers on the board. It will take you longer to take the board out of the plastic tray than to do the mod. Bob (KCBOOBOO)a member here also has some very good articles on programming as well on the repeater-builder site
Doug

Doug

Petnrdx:
I may have some 900Mhz stuff kicking around here (uniboard and vco's) if that helps. I wont be able to check today but if your interested I can check tomorrow. If you want to pursue it we'll work out some sort of barter/trade
Doug

Doug

That's your best bet, doing it in this fashion gives control over each independently. Just make sure you setup your VHF port as a non duplex port. Set your audio levels and you should be good to go

Doug

First of all let me say welcome to the board. I'm afraid a little more information is required. Is the station running internal filters or an external duplexer. Is this a new setup or has it been on the air for a while. The transmitter keying is dependent on the feedback voltage coming from the circ...

Doug

It's been soooo long since I've played with that type of radio. Here is another site to browse and look through

http://www.repeater-builder.com/motorol ... tions.html

Doug

You also need to power the control head. If they are dash mount you'll need to power pin 5 of the db15 acc. connector Your speaker audio is also retrieved at the db 15 as well.

http://batlabs.com/spectra.html
Doug

Doug

Your situation seems to be more on the line of a receiver problem than a transmit problem. Have you tested the system for desense on the receiver? Unfortunately with repeaters there are a lot of variables involved.

Doug

Out of curiosity is there a white molex connector on the the left side of the station about 4 inches below the amp? The reason for me asking is in some of the 250 watt stations I've seen the circulator was installed in the high power amp and the driver amp was straight through with no circulator. It...

Doug

There is a place in the RSS I want to say it's under your channel information, they have a key up delay for the PA. Default is around .39 seconds. They have this delay built in if your running it in a base station configuration to give the antenna relay a chance to switch over to the TX side. In a r...

Doug

Repeater builder site has what your looking for there's quite a large section on MSF's
Doug

Doug

Right now my biggest worry is what are my loses by adding a receive coupler in the mix. As in any build process there is one thing that you over look and mine was not taking any measurements for sinad before and after installing the coupler. I've not had much luck with pre-amps I'd like to stay away...

Doug

Trust me it was alot of trial and error and a couple of "OH CRAPS" throw in for good measure. Still waiting to make some test measurements.

Doug

First of all thanks to the Pager Geek for his information on passing P25 with an MSF It's going.......passing the p25 was easy, controlling it was the biggest issue. What I had to do was use an XTL1500 as a second receiver. The MSF is garbage in / garbage out however the xtl isn't. What I had to do ...

Doug

Chris
Although my manual doesn't have any specifics with reference to the 350 watt there is one little blurp I found interesting
"25 Watts, VHF- maybe used as a final amplifier for the 25 watt configuration or as a driver amplifier in the 350 watt configuration"
Doug

Doug

I had a feeling it would go that way, sometimes it takes someone to look over what you've done and point out something that has been overlooked. At some point I'm going to contact you off list and explain why I'm pursuing this venture.
Doug

Doug

Hello Bob, Long time....First of all let me say that I'm sorry to those following this post for it's length, I am trying to cover all points. I'm actually messing with the MSF receiver. After a couple hours of messing around yesterday these are my findings to this point. The station started out as a...

Doug

Anyone around the board ever mess with an MSF5000 and a scanning receiver? I'm kind of looking for someone who has dealt with some of this stuff. I'm comfortable with working around the 5000 and have all the necessities, just looking for alittle guidance.
Doug

Doug

Just an FYI the 3.28 your seeing is a firmware version, just off the top of my head and glancing at it I'd say secure board version. If that's the case make sure your jumpers ju1 and ju2 are set up apropriately. JU1 in normal position with a TTRC and JU2 in the alternate position with a secure board...

Doug

Build a new code plug with the default ones and it should clear things up

Doug

There should be no tunning involved with the amp. It all depends on what your drive power is set at. Your mileage will vary a bit but with 7 or 8 watts of drive should obtain the output you desire. Are you using this as a stand alone amp or are you running it in a MSF repeater configuration?
Doug

Doug

Best place to start:
http://www.repeater-builder.com/motorol ... index.html

Doug

My biggest concern would be the selectivity of the receiver. In an area with a lot of stray rf floating around it could be trouble. I had actually thought about doing something like that for a large ham group in the Chicagoland area. It has multiple recieve sites and several talk out sites. My idea ...

Doug

How about.....I haven't quite got this figured out yet I'm kind of typing out loud. Program the station to accept the MRTI as a PTT qualifier and set your receive frequency to some obscure frequency and tune the VCO to that frequecy in doing this it will clear up any error codes the station would ha...

Doug

Sounds like your in for a treat...I've seen where loose mounting hardware (tower bolts flange bolts etc) generate noises

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