Batboard

I believe that you are correct - the station control board is the same in the station and the receiver.

It is probably related to the station [EPIC] firmware version. There is a relationship between which wireline versions work with what station versions.

The newer station firmware loads the wireline code at bootup but earlier cards won't accept it. This accounts for your observations.

Who put a burr under your saddle Mr. fineshot1?

You could just Google it if you aren't familiar with the Motorola R1011:

http://www.repeater-builder.com/test-eq ... supply.pdf

The GBS-8219 works great for me.

I recommend that you pull each card from your machine and inspect for capacitor cancer.

The surface mount electrolytics are prone to leakage and there are a lot of them in there.

Tech255 wrote: "...While Wowbagger was prominant on this site it was possible for him to generate codes to reset your options but as hes not been on since xmas last year..." --------------------------------------------------------------------------------------------------------------------...

I have an H23BAM. It has date stamps inside from 1960. It's a hybrid of transistors & tubes. It still works. These ran on wet nicad battery packs. Mine has a conversion to allow it to run on externally provided 12 VDC. http://batboard.batlabs.com/viewtopic.php?f=1&t=108752&p=476390#p476390

Dispatch clock? We have no clocks in dispatch. All the computers have time sync'd to a master netclock. Dispatchers use CAD time for everything. That said, if you want a clock that for sure will show the same time as CAD, get one from your netclock vendor, for example: https://spectracom.com/product...

"I'm guessing the hardware VU meter is a homebrew part?" ________________________________________________ Not much "brewing" involved, just a matter of mounting a commercial off-the-shelf (COTS - isn't that what everybody wants these days?) audio indicator in a box and hooking it...

Here is a crucial question. Early 2975's have a two piece processor consisting of a carrier card that plugs into the 2975 motherboard and a piggyback computer with a jillion cross-connects. Later units have a one piece card. Several different hard drive sizes were apparently used. Will an image from...

Continuing with the earlier concept of replacing the 2975's hard drive with an SSD, I did try to replace my 40 GB drive with a 64 GB Kingspec SSD. No joy. I tried to put the image on the SSD with two different PC apps and I also tried a physical cloning hard drive workstation. This pretty much confi...

"...Too bad we'll never see innovation like this in the P25 world.." -------------------------------------------------------------------------------- I think you'll see plenty of innovation. How about this. With an APX8000 (and obviously everything configured and programmed correctly) if y...

How do your dispatchers know when the problem occurs? Do field units call in on the phone and complain? Do you have a recorder connected at each position to the VPL logging port? What does the dispatcher see on the VU indicator? We decided that the on-screen VU indicator in the console application i...

ljohn6 asked: "I have a question about a 2975 as this was one of your baby's I figured you would be able to tell me can the Hard drive be updated to an SSD and is there anyway to back it up or make an image. for that day when our hard drive decides its lived long enough. " ----------------...

Check your front panel fuses - Gen Out & Ant in - One of them is probably blown.

The Celwave RMC800 multicouplers were available with various configurations, the number on the end indicates the number of ports. A "-K" after the number of ports indicates a two piece system comprised of an antenna mounted unit and a station mounted unit. An RMC800-24 would be a one piece...

With the proliferation of spectrum use, being proactive and monitoring for interference to your system is becoming more important than ever for system administrators. With older radio systems your users could recognize interference and report it but with modern systems all they notice is that things...

Cobham has stated that beginning January 1, 2017 they will no longer repair the 2975.

Wowbagger, Following your advice to my earlier question about the 2975 that would not boot, I found a set of drive parameters that worked and the unit does boot. There is still however, an issue of some sort. After it boots it comes up completely to the last screen it was on but it is completely unr...

I have a 2975 question. I have two 2975's in my life - one at home and one at work. (BTW, neither of them ever "freezes" - they might take a long time to boot but once running respond just fine -also - I particularly like the 2975 better when driving with a mouse) The two units are differe...

If your stations have Epic-III Station Control Modules and you are programming amateur frequencies that are out-of-band - that would be your problem.

You could try programming an in-band frequency and check the TX audio there.

Fortunately, other people make attenuators!

You guys that are going will have to be the eyes and ears for those of us that can't go. Be sure to stop by Motorola and look at the new APX8000 V-U-7-800. Since it's the same size as a 6000 you would have to believe that it only has one RF board, not two like the 7000. That pretty much has to mean ...

"It will be the Xicor eeprom on the scm for certain (unless it's an Atmel part, in which case ignore me)" ----------------------------------------------------------------------------------------------------------------------- X2 Also, there is no battery. The Quantar clock always defaults ...

48-82256C36 is a 28V Zener diode

VE3HKB wrote: "I don't know why the previous calculation is wrong, but it is wrong..." --------------------------------------------------------------------------------------------------- If you are referring to the numbers I posted - they're definitely wrong. The return loss formula is cor...

Return Loss = 10 log(P1/P2) = 10 log(34/2.5)
RL = 23.6 dB which is close to an SWR of 1.5:1

At UHF a properly configured and operating antenna system will normally be better than that.

The base control parameters are defined in the operator position personality programming which is performed with different methods depending on the type of operator card - OMI, TOMI, or COIM.

The regulator chip is not an LM 723, it's an MC1566. When mine died, the pass transistors shorted out and the current sense resistor opened. That caused all the power to go through the current meter which immediately blew out as well. It was too far gone to fix, given that you can get a working one ...

Upon further reflection - rather than a stern voice - I think I would recruit a really sweet sounding YL to record something like: "We're sorry. It appears that you may have inadvertently attempted to transmit with encryption enabled. In accordance with FCC rules governing the amateur radio ser...

One of the primary applications of the DIU is to interface dispatch consoles to digital capable channels. As such, it is often desired to have a "coded" indication available on the console. To accommodate that feature, the DIU can be programmed to activate a "Mode" output line to...

Bill_G: “…range is range is range is range…” Well, it is and it isn’t. In terms of path loss and RF signal level – yes. In terms of useable communications range – not necessarily. Bill_G: “…Otherwise, we would all experience instantaneous range changes as deviation fluctuates as a function of speech...

Service manuals for the R2600 series are available for purchase from General Dynamics in both hard copy and pdf format.

As long as we are talking about these antiquities, I have to show you the one I just acquired. It's related to the radios in this thread, but I don't ever remember seeing one quite like it before. It's an old Handie-Talkie - by old - I mean 54 years old (1960). http://i88.photobucket.com/albums/k174...

http://www.gdsatcom.com/cte_autotest.php

"...It's a purely hardware interface. No ip magic. ..." ------------------------------------------------------------------ The Raven 37600 series was old school but the M4 is state of the art and very flexible. It has the ability to link multiple systems and multiple talkgroups together th...

This thread has gone way off topic.

The question: "EF Johnson - Do they manufacture their own radios?" has been answered.

There wasn't enough space on the TOMI board for them to put receive audio circuitry.

For that reason, TOMI's are always paired with an AEI.

There is a 7-pair Y-cable used to get the audio from the AEI to the OP.

The second receiver in a Quantar is not like a second receiver in other station models like MSF or Micor. The second receiver in those stations could be independent and function simultaneously. You could equip the station with multiple wirelines and have each receiver come down a separate line to th...

Kinley used to have a monthly technical column in the old Mobile Radio Technology magazine.

He teaches at the practitioner level rather than at some esoteric theoretical level.

His books will give you good guidance.

Two books by Harold Kinley:

"Standard Radio Communications Manual with Instrumentation and Testing Techniques"

"The Radioman's Manual of RF Devices - Principles and Practices"

Dave is correct. The tracking generator was standard on the R2600B unless deleted by ordering R2600B-NT. There was no tracking generator available on the R2600A. Also the spectrum analyzer on the R2600A was limited to a maximum 10MHz span. That was increased to 100 MHz in the 2600B when the 50 MHz t...

Wowbagger is the expert on these. Hopefully he'll come along and get you some advice.

In the meantime, I am pretty sure the 1600 display is EGA, not VGA, so a 9 to 15 adapter may not help you much. You may need a converter.

I'm not sure about the firmware. The only ones I was ever involved with were "official" Motorola projects and they send out new firmware versions for everything anytime you so much as touch the thing. I think it's worth a try, though. You would want an Elite CD version that was shipped pre...

OK. Posting the fact that this issue was out there is one thing. Debating it here is another matter. We're not going there. The Batboard lounge is long gone.

Yes, you can have a COIM based button & LED console - they called that product Centracom Gold Classic.

The 6809 / OMI based CCII button & LED consoles program with a special firmware kit that installs on a spare OMI. This was sold as the B1610 Field Prom Programmer [FPP]. The FPP consists of two sets of PROM's: Part 1 firmware BLN6778A and Part 2 firmware BLN6779A. The kit also included an instru...

RVN5003 was listed for Astrotac comparators.

ebay item number 261241648388

http://batboard.batlabs.com/viewtopic.php?f=42&t=105872

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