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Search found 895 matches

by Mike B
Thu Nov 09, 2017 3:17 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 VHF conversion to 2 meters
Replies: 18
Views: 1768

Re: Syntor X9000 VHF conversion to 2 meters

Some things to understand about the SyntorX/X9K VCO are: The VHF VCO generates the Tx frequency directly. There are no VHF Tx multipliers or mixers. The IF frequency is 53.9 MHz. So the receive VHF VCO frequency is 53.9 MHz higher than the exact same simplex transmit VCO frequency. http://www.onfreq...
by Mike B
Fri Jun 30, 2017 5:42 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola DEK Pinouts
Replies: 3
Views: 1026

Re: Motorola DEK Pinouts

Wow, a really old thread! For the Syntor site the open.org domain is looong gone. It's now at http://www.onfreq.com/syntorx/ It's really invasive, but Google can be your friend, well almost :). http://www.onfreq.com/syntorx/syntorx9k/cablesx9.html This newer DEK page was added since those olden days...
by Mike B
Thu Feb 16, 2017 11:04 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X drawer swap
Replies: 20
Views: 1473

Re: Syntor X drawer swap

Well you never know who some random person might be! Experts like Andy Brinkley are still lurking out there. When you purchase a complete working Syntor X its main cable wiring configuration, control head internal jumpering, radio drawer personality board jumpering and code plug options will all be ...
by Mike B
Wed Feb 15, 2017 11:20 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X drawer swap
Replies: 20
Views: 1473

Re: Syntor X drawer swap

First find the part numbers on your actual control head boards here: http://www.onfreq.com/syntorx/syntorx/controlx.html#top_cnthead For example there are HLN4290 user select Non-Priority heads like this: http://www.onfreq.com/syntorx/photos/npx8.jpg and standard mode scan heads like this: http://ww...
by Mike B
Wed Dec 28, 2016 6:48 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor x9000, Need J1 or HLN5299B/HLN4925B
Replies: 17
Views: 1797

Re: Syntor x9000, Need J1 or HLN5299B/HLN4925B

The main power A and B pins inside the cable J1 connector housing are known for the red or black wire becoming separated from the pin at the solder joint. Sometimes the solder between the wire and pin stress fractures from mechanical vibration or manipulation of the cable. It is not impossible for h...
by Mike B
Mon Dec 26, 2016 7:57 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor x9000, Need J1 or HLN5299B/HLN4925B
Replies: 17
Views: 1797

Re: Syntor x9000, Need J1 or HLN5299B/HLN4925B

One last thought about X9K control heads with pin 15 orange wire internal power jumpers. Never use them in any normal installation where the orange wire is connected to the vehicle (put a warning label on the back of the head). This ignition circuit is not for starting the vehicle, but it is suppose...
by Mike B
Mon Dec 26, 2016 7:32 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor x9000, Need J1 or HLN5299B/HLN4925B
Replies: 17
Views: 1797

Re: Syntor x9000, Need J1 or HLN5299B/HLN4925B

It shouldn't matter if your 28 pin U502 chip is original Motorola or not. That is unless you are hoping U502 might sill have the original factory code plug from the factory programming label on the underside of the radio drawer top lid. If U502 has the correct label, then it probably is physically t...
by Mike B
Sat Dec 24, 2016 5:45 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor x9000, Need J1 or HLN5299B/HLN4925B
Replies: 17
Views: 1797

Re: Syntor x9000, Need J1 or HLN5299B/HLN4925B

The HLN4925B is an early first version of the conventional X9K personality board. The HLN5299B was the third and last revision of the same board. The J1 connector is the same for all three versions. http://www.onfreq.com/syntorx/syntorx9k/boardsx9.html#x9kperbd http://www.onfreq.com/syntorx/syntorx9...
by Mike B
Sat May 07, 2016 7:24 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Talking to a DEK
Replies: 2
Views: 695

Re: Talking to a DEK

You are missing a numerical digit in your part number. The complete part number might be HLN1241D. If this is correct then the following information applies. Take a look at the DEK Functional Block Diagram on this page: http://www.onfreq.com/syntorx/syntorx9k/dekx9.html The clock shifts the data ins...
by Mike B
Tue Oct 13, 2015 7:22 pm
Forum: Motorola Digital and Voice Paging
Topic: Minitor V band split
Replies: 1
Views: 1052

Minitor V band split

What is the VHF band split frequency range for a Minitor V model A03KMS9239BC with factory programmed frequencies in the 170 and 173 MHz range?

Thanks.
________
Mike
by Mike B
Sun Jan 13, 2013 1:15 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: maratrac question
Replies: 6
Views: 857

Re: maratrac question

Sorry, this in not very helpful because all my PAC-PL and PAC-RT manuals are in storage over 1000 miles away from home. All I have is the part number for the MaraTrac cable:
NKN6214BSP09 - Interface Cable (MaraTrac)

It does not say which head it is for.
by Mike B
Thu Dec 27, 2012 8:18 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 VCO reference divider questions
Replies: 18
Views: 3359

Re: Syntor X9000 VCO reference divider questions

Another piece of the puzzle is you also need to put your logic analyzer on P601 pin 9 Synthesizer Sync. This is a U603 pin 4 output that goes to the U500 pin 17 input. It is part of the synthesizer frequency change mechanism timing.
by Mike B
Tue Dec 25, 2012 2:33 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 VCO reference divider questions
Replies: 18
Views: 3359

Re: Syntor X9000 VCO reference divider questions

I found the other method to calculate the A & B bit values for a desired frequency documented here: http://www.paul-bennett.com/Motorola/algorith.htm In theory it appears that worst case you can get 64,449 attempts to find the correct frequency. If your AVR processor in your Arduino has the hard...
by Mike B
Tue Dec 25, 2012 10:08 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 VCO reference divider questions
Replies: 18
Views: 3359

Re: Syntor X9000 VCO reference divider questions

Oops, I forgot the signal timing information the first time and added it (see the edit notice at the bottom). The timing looks good. It follows the 0, 1, 3, 4, 7, 6, 6 and 2 address sequence. You might expand the logic analyzer timing base (stretch out the pulse lengths in the timing diagram) and ch...
by Mike B
Tue Dec 25, 2012 8:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 VCO reference divider questions
Replies: 18
Views: 3359

Re: Syntor X9000 VCO reference divider questions

The link above is the correct link. The synthesizers are the same in the Syntor X and Syntor X9000 radios, except for some minor changes in the analog PLL ramp circuit. Your logic analyzer trace shows two Rx frequencies (S0 is always 1) with the Rx Extender (low band very fancy noise blanker) turned...
by Mike B
Tue Apr 17, 2012 8:17 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 Fail 01/90
Replies: 14
Views: 1029

Re: Syntor X9000 Fail 01/90

The large red wire is known for coming un-soldered inside the radio J1 connector housing. Wiggling or mechanically stressing the large red/black wires at the J1 connector may change the connection from working to not working or the other way around. I have simply pulled red wires out of the connecto...
by Mike B
Wed Feb 29, 2012 11:29 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Deaf VHF Astro Spectra (100 W unit)
Replies: 6
Views: 847

Re: Deaf VHF Astro Spectra (100 W unit)

Been there done that. A PIN diode CR3903 on the bottom of the HLD6063 VHF high power amplifier board shorts out from the high power RF energy the low band X9k Tx provides to the Spectra antenna. CR3903 is Motorola part number 4880142L01, with comments: SOT 23 MMBV 3401. It is a 3 pin surface mount (...
by Mike B
Fri Feb 17, 2012 7:47 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra A4 head, what part do I need
Replies: 3
Views: 360

Re: Spectra A4 head, what part do I need

What is the model of the Spectra drawer? The low/medium power radio drawer is able to mount the control head directly. A high power drawer cannot mount the control head directly. A low/medium power radio needs a HLN6285 radio interconnect board to make the control head a dash mount radio configurati...
by Mike B
Wed Feb 01, 2012 3:47 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Rnet manual
Replies: 3
Views: 626

Re: Rnet manual

1.2 RNET-SLM RADIOS Although the RNet-SLM telemetry circuit boards are different from those of the RNet radios, the location of the tuning adjustments and DIP switches are located in the same places. The only difference between between the two types of radios (other than the packaging) is the remov...
by Mike B
Fri Oct 21, 2011 10:15 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: maratrac siren and dek w/ spectra a9?
Replies: 7
Views: 654

Re: maratrac siren and dek w/ spectra a9?

The Maratrac siren/PA and its DEK are not systems 9000 devices. Motorola used the same plastic housings for both Maratrac and Systems 9000 siren/PAs and DEKs, but they only look similar on the outside while being very different on the inside. The Maratrac vs. Spectra siren/PAs have different cables ...
by Mike B
Wed Sep 21, 2011 11:52 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 UHF 450-470 no receive
Replies: 8
Views: 955

Re: Syntor X9000 UHF 450-470 no receive

On this site: http://www.onfreq.com/syntorx/ look at this page for jumper settings (click on your personality board model at the top of the table): http://www.onfreq.com/syntorx/syntorx9k/boardsx9.html#x9kjuper You want Non-Securenet, UHF and Conventional on JU100 through JU505 and JU516. I assume t...
by Mike B
Fri Sep 16, 2011 8:16 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Wierd X9000 Issue - Attention Mike B.
Replies: 6
Views: 1100

Re: Wierd X9000 Issue - Attention Mike B.

Not all of these suggestions seem to apply to your problem (depending on if I understood everything or not). Sorry, I'm just trying to cover all the bases. The radio cannot work 100% with the RIB and programming cable plugged into the radio. The RIB shorts the microphone hi line to ground, so your T...
by Mike B
Mon Jun 13, 2011 1:34 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: where can one find a spectra HHCH cable
Replies: 9
Views: 1514

Re: where can one find a spectra HHCH cable

If your A3 head is the HCN1053 with a DB-25 pin connector, this should plug into the DB-25 connector on your cable end. Then you plug into the cable end DB-15 with an accessory connector that has the ignition wire, the emergency jumper wiring, the two pin speaker connector and the microphone hang-up...
by Mike B
Mon Jun 13, 2011 5:55 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: where can one find a spectra HHCH cable
Replies: 9
Views: 1514

Re: where can one find a spectra HHCH cable

Be careful there are two different types of HHCH Spectra radios. The T84gxa7h a3 ak (A3 model) probably has an A3 type HLN6226 or HLN6229 HHCH Radio Interconnect Board with a 3080069P02 or HLN6092 remote mount HHCH cable. This interconnect board is the one with the two 25 pin connectors on it from t...
by Mike B
Fri May 27, 2011 12:04 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000
Replies: 1
Views: 361

Re: Syntor X9000

Actually with the the 01-06707T52 U501 128 mode scan firmware and 8k chips, if you correctly program the scan list, the radio will scan up to 128 non-priority modes and in addition up to 2 priority modes. All of the 128 non-priority scan modes must be mode 128 or lower. Only the priority scan modes ...
by Mike B
Wed May 25, 2011 1:56 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Syntor X9000 to Syntor X conversion for APRS?
Replies: 4
Views: 998

Re: Motorola Syntor X9000 to Syntor X conversion for APRS?

It is something like the reverse of the Syntor X to Syntor X 9000 conversion. You need a conventional VHF Syntor X personality board and a conventional VHF Syntor X common circuits board. However, there are different varieties of conventional Syntor X personality boards for low band and 800 MHz use....
by Mike B
Mon May 16, 2011 6:00 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: nonstandard pl/dpl
Replies: 13
Views: 2681

Re: nonstandard pl/dpl

Simple, assuming the RSS lets you enter the codes, just try Tx DPL +212 or -212 until you find one that works. If you cannot enter the plus (not inverted) or minus (inverted) try 212 or 356 until you find one that works. Do the same with the Rx DPL if you want to use it. Sorry, I do not remember the...
by Mike B
Tue Mar 08, 2011 5:31 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Spectra
Replies: 1
Views: 518

Re: Motorola Spectra

What is the part number on your remote mount interconnect board: http://www.onfreq.com/syntorx/spectra/partssp.html#sprdib What is the part number on your control head circuit board: http://www.onfreq.com/syntorx/spectra/partssp.html#spchea Do you use the remote mount HLN6432 board in the control he...
by Mike B
Sat Feb 12, 2011 9:14 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Head Separation Question
Replies: 10
Views: 756

Re: Spectra Head Separation Question

This diagram shows the different ways of building up control heads for dash and trunk mount radios: http://www.onfreq.com/syntorx/spectra/index.html#combo It has hot spots you can click on for part numbers of the different assemblies. However, the information is for more than just your particular ne...
by Mike B
Fri Feb 04, 2011 1:48 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Using x9000 control head on spectra low power.
Replies: 11
Views: 1074

Re: Using x9000 control head on spectra low power.

In trying to use the HCN1045 head on a Syntor X9000, they always come up with a verify error while trying to write to the head. So I have given up and use those on the Spectra radios. Older heads like the HCN1045 require the Mic Hi line to be shorted to ground, in order to program the control head ...
by Mike B
Mon Dec 27, 2010 8:17 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Syntor
Replies: 5
Views: 796

Re: Motorola Syntor

Dar, Check out the Conventional Syntor page here: http://www.onfreq.com/syntorx/ You can build your own PROM replacement boards: http://www.onfreq.com/syntorx/syntor/index.html#seprom http://www.onfreq.com/syntorx/syntor/eprom.html At least it upgrades the original factory one time only programmable...
by Mike B
Sat Dec 18, 2010 7:26 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Astro Spectra VRS-EP S SPlit, possible lower than 450?
Replies: 3
Views: 582

Re: Astro Spectra VRS-EP S SPlit, possible lower than 450?

The RF circuit boards on the Expo and RNet radios are the same. The audio circuit boards and housings are different. The VRS-EP is supposed to use the RNet radio. The older VRS (not the EP) used either the Expo or RNet radios. These are all crystal controlled narrow frequency range radios. Many comp...
by Mike B
Mon Dec 06, 2010 11:48 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Now "Need LB X9000 COMMON circuits Board Schematic
Replies: 6
Views: 614

Re: Now "Need LB X9000 COMMON circuits Board Schematic

I admit it, I'm a lazy coward :). If I already had good PDF scans of the Motorola manuals and Motorola's written permission, I would be happy to host as many as possible Syntor/X/X9k PDF format manual copies on my web site.
by Mike B
Sun Dec 05, 2010 12:48 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Now "Need LB X9000 COMMON circuits Board Schematic
Replies: 6
Views: 614

Re: Need LB X9000 Control Board Schematic

Other than some plug in jumper position differences, there is nothing low band specific for the Syntor X 9000 personality boards. Just avoid the Syntor X 9000 800 MHz trunking manuals - these trunking radios are really Syntor X radios inside (do not confuse these with Syntor X 9000 E trunking radios...
by Mike B
Wed Dec 01, 2010 8:10 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: x9000 help
Replies: 5
Views: 594

Re: x9000 help

Syntor X 9000 drawer view: http://www.onfreq.com/syntorx/syntorx9k/vtourvx9k.html#bot_view Syntor X drawer view: http://www.onfreq.com/syntorx/syntorx/vtourvx.html#bot_view The main difference is the personality board and the common circuits board. By swapping out these two boards you may convert a ...
by Mike B
Wed Nov 17, 2010 9:07 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Need remote head cables for Spectra
Replies: 3
Views: 390

Re: Need remote head cables for Spectra

Your trunk mount hi power drawer may use one of two different remote mount cabling setups. There is no dash mount configuration for these drawers. http://www.onfreq.com/syntorx/spectra/index.html#combo This shows how the same A7 front plastic and circuit board are migrated between dash and remote mo...
by Mike B
Sun Oct 24, 2010 6:29 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Headless X9000 ?
Replies: 6
Views: 557

Re: Headless X9000 ?

I have never tried it. One difference is the X9k radio drawer power source for the switched 9.6 and 5 volts comes from the control head. The spectra gets this power from its radio drawer power leads. The Spectra control head only signals the radio drawer when to turn on or off. http://www.onfreq.com...
by Mike B
Thu Sep 23, 2010 9:49 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X Experts
Replies: 9
Views: 1268

Re: Syntor X Experts

These radios were designed for up to 50 MHz service. Back in the old before cable days, TV channel 2 over the air reception was rather close to 50 MHz, so it made sense to make the harmonic filter on the Power Amplifier (PA) deck have a sharp cutoff frequency to avoid TV interference. First you need...
by Mike B
Tue Sep 14, 2010 7:46 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X Experts
Replies: 9
Views: 1268

Re: Syntor X Experts

The VHF service manual revisions that cover different schematics are listed here: http://www.onfreq.com/syntorx/syntorx/manualsx.html#xvhfloc The HLN4915A Personality Board documentation is found in the 68P80100W51-O low band manual and 68P81060E05-A VHF manual (it is special version of an HLN4760A ...
by Mike B
Sun Sep 12, 2010 1:59 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X Experts
Replies: 9
Views: 1268

Re: Syntor X Experts

I'm getting really confused by your new use of X 9000. There are 3 different major variations of conventional Syntor radios. The original Syntor , the Syntor X and the Syntor X 9000 . These are all very different radios: http://www.onfreq.com/syntorx/#modesc The Syntor X 9000 has a completely differ...
by Mike B
Sun Sep 12, 2010 7:42 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X Experts
Replies: 9
Views: 1268

Re: Syntor X Experts

It mostly depends on if you have a radio drawer internal HLN4728 HHCH interface board that mounts above the personality board or an external SIU box HHCH interface: http://www.onfreq.com/syntorx/hhch.html#hhchsiu The personality board jumpers are different for HHCH and really different for the inter...
by Mike B
Sun Sep 05, 2010 3:24 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SYNTOR X memory module schematic needed
Replies: 4
Views: 779

Re: SYNTOR X memory module schematic needed

Hi Paul. Lets not get carried away. How about just sneaking in a Motorola batwing on a statue of Hermes instead :). You probably do not need the power strobe circuitry and Q1800, R1801 could be omitted (then R1800 to pin 21 WE could be replaced with a direct connection to Vcc) unless you use a Motor...
by Mike B
Sun Sep 05, 2010 8:52 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SYNTOR X memory module schematic needed
Replies: 4
Views: 779

Re: SYNTOR X memory module schematic needed

Even just for the VHF manuals, there is more than one service manual: http://www.onfreq.com/syntorx/syntorx/manualsx.html#xvhfloc For example the 6881060E05-C manual probably has the best memory module information (I don't have access to this particular manual at this time). Since I have no way to a...
by Mike B
Sun Sep 05, 2010 7:56 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X White to Orange Module Conversion
Replies: 1
Views: 401

Re: Syntor X White to Orange Module Conversion

The part number (68-80100W53) for the Motorola manual covering the radio for a white label PROM memory module to an orange label EEPROM memory module conversion is located here: http://www.onfreq.com/syntorx/syntorx/progx.html#whtmod The problem was some of the older personality boards built before ...
by Mike B
Fri Jul 16, 2010 12:55 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: X9000 help
Replies: 14
Views: 1214

Re: X9000 help

Does your HCN1063 head work on other radios? Does your Spectra radio drawer work? Is your RSS setup as a single radio with a S9000 control head? For example, I think the dual radio drawer that is setup for the SIU and HHCH is marked as an A9, but will not work with A9 heads. I can't remember if the ...
by Mike B
Sat Jul 10, 2010 12:25 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: X9000 help
Replies: 14
Views: 1214

Re: X9000 help

If you get no errors, you hear alert tone beeps and you get Tx power it means your 9.6 volt, switched 5 volt and unswitched 5 volt power should all be good. The beep comes straight out the microprocessor into the audio and bypasses the normal Rx audio path, so the audio is working. http://www.onfreq...
by Mike B
Sat Jul 10, 2010 10:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: X9000 help
Replies: 14
Views: 1214

Re: X9000 help

It's been a long time, but I just remembered the large red lead sometimes comes loose inside the radio connector (the newer cables used epoxy inside the connector housing to prevent this). Open the radio drawer lid and measure the voltage on the A and B solder pads shown in the gif. If the wire is l...
by Mike B
Sat Jul 10, 2010 10:27 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: X9000 help
Replies: 14
Views: 1214

Re: X9000 help

This is typical behavior if the large red wire that goes to the radio drawer has no power (blown fuse, corroded or loose connection, etc.). The power from the control head will run everything except the RF PA deck and audio output amplifier. The control head power is through the green wire and into ...
by Mike B
Thu May 27, 2010 7:34 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra A4 remote head question
Replies: 9
Views: 952

Re: Spectra A4 remote head question

The onfreq HLN6432 reference to (rotary) and (pushbutton) were from the original Motorola documentation. However, in reality it doesn't seem to matter and the jumper differences were actually between different revisions A, B and C of these boards. I see how it can be confusing. When I have some spar...
by Mike B
Fri Apr 02, 2010 7:05 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Question
Replies: 4
Views: 536

Re: Spectra Question

Will is absolutely correct. This T-cable: http://www.onfreq.com/syntorx/spectra/cables.html#x9k4304 is only used when daisy chaining from a VRS to a Siren/PA. The VRS connector is physically the same as an X9k connector which the T-cable fits into. The Spectra radio drawer uses a different DB-25 con...

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