Spectra Radio Ignition Wire TX Inhibit hookup...

KD6HXH · Post by **KD6HXH** » Fri Aug 18, 2006 11:52 am

I have a Spectra radio that I would like to utilize the ignition wire TX inhibit option on, but I have not been able to figure out what all needs to be enabled/disabled within the RSS to make this work. Just by simply enabling the ignition wire TX inhibit option under the radio wide screen in the RSS does not do it.

Can anyone tell me what all I need to do in order to enable this option.

Also, if anyone can tell me what the exact hookups are for utilizing the A/B speaker output and the internal PA option, that would be great.

Thanks in advance to all that reply.

Bruce1807 · Post by **Bruce1807** » Fri Aug 18, 2006 1:33 pm

If it's remote mount hook the green wire to battery and the orange wire to ignition
If you want full ignition control both wires to the ignition switch

wx4cbh · Post by **wx4cbh** » Fri Aug 18, 2006 2:17 pm

Just keep in mind that MotherMoto strongly objects to the green wire being tied to anything other than the same voltage source (meaning the battery or its equivalent) as the larger red (main power) wire, and for many good reasons. In fact, I have two Spectras that have a label on the top covers that state their objection emphatically.

kcbooboo · Post by **kcbooboo** » Fri Aug 18, 2006 2:23 pm

If it's a dash-mount A5 or A7 radio, you have to fool with jumpers in the control head, so the radio will receive with the ignition off but not be allowed to transmit until ignition voltage is present.

The default is the whole radio is off (no receive or transmit) without ignition voltage, or both are allowed when it is.

Bob M.

KD6HXH · Post by **KD6HXH** » Fri Aug 18, 2006 3:10 pm

Well, my radio is a remote mount, BUT, I have already tried connecting the orange wire to the ignition and the green directly to the battery. It didn't work. Unless both the green AND orange wires were both connected to a 12v positive source, the radio wouldn't even power on.

Now, as mentioned within the thread, someone said there is a jumper wire in the control head that has something to do with this. So, where is this jumper wire located on the remote mount head that I need to snip, in order to get this ignition TX inhibit to work?

Thanks in advance-
-Jay
KD6HXH

jmr061 · Post by **jmr061** » Sat Aug 19, 2006 9:41 am

Please tell us what control head you are using, A4/5/7/9?

Thanks

Jason

KD6HXH · Post by **KD6HXH** » Sat Aug 19, 2006 10:32 pm

A5/C5 control head.

jmr061 · Post by **jmr061** » Sat Aug 19, 2006 10:47 pm

RECEIVE enabled by control head ON/OFF switch; TRANSIT enabled
only when ignition switch is ON. JU1 IN; JU2 OUT
Connect ignition cable to “ignition” at fuse block.
Enable “TX inhibit” ignition switch setting in RSS or CPS

DO THE ABOVE and as a side note:

For remote mounted radios, the same options of operation are available to the customer. The fused GREEN wire coming from the control-head end of the interconnect cable is connected to “Battery Hot.” The ignition cable is the fused ORANGE wire also coming from the interconnect cable. The control head is shipped with jumper JU1 OUT and JU2 IN. Configured this way, connections to the ignition cable are made following options (1) or (2) above.

KD6HXH · Post by **KD6HXH** » Sun Aug 20, 2006 11:15 am

Well, I took the control head out of the dash, and gave the back of the control head a good look-see, and for the life of me I was not able to find ANY jumpers.

Are the jumpers in fact located on the back of the control head? Or are the jumpers on the radio drawer?

Now, what is the possibilty that there aren't any jumpers and that Zero ohm resisters were used? If this is the case, which resisters are they?

Thanks in advance-

Sorry for being so dense.

KD6HXH

kcbooboo · Post by **kcbooboo** » Sun Aug 20, 2006 11:56 am

Sorry. They ARE zero-ohm resistors. On Spectras, they are called jumpers. I guess we all knew that, but failed to communicate it to you.

I'd bet there are multiple circuit boards used for A5 control heads, so you'll have to give us the HLN number stamped on it, so we can find the right X-ray view and hopefully let you know what to change.

Bob M.

KD6HXH · Post by **KD6HXH** » Sun Aug 20, 2006 12:02 pm

HLN6337D is the HLN number of the control head board that I have.

Thanks for all your efforts to help me out. I really appreciate it.

KD6HXH

KD6HXH · Post by **KD6HXH** » Thu Aug 24, 2006 11:02 am

Any luck yet on the X-Ray view, Bob?

KD6HXH

kcbooboo · Post by **kcbooboo** » Thu Aug 24, 2006 11:22 am

No, I couldn't find that number on the control head info I have. Are you sure that's not just the plug-in adapter?

Unfortunately, the jumpers are not even labeled on the board - that would be too easy. You need the X-ray view to locate them.

I was hoping someone else would have the info.

Bob M.

KD6HXH · Post by **KD6HXH** » Thu Aug 24, 2006 11:32 am

I double checked, and that WAS the number of the actual control head board.

Do you have any info regarding the jumpers for any A5/C5 control head boards? That would at least give somewhere to start.

I think I may just have to get out the DVM and start trying to determine on my own which resistor controls the PTT and which resistor controls the ingition wire. Hate to start guessing, but it may be my only option at this point.

KD6HXH

RESCUE161 · Post by **RESCUE161** » Fri Aug 25, 2006 4:36 am

I used the jumpers on a couple of W7 heads. They were near the power button and as Bob stated, they were not labeled.

KD6HXH · Post by **KD6HXH** » Fri Aug 25, 2006 8:52 am

Well, thanks to Bob and the schematic that he sent me, I figured it out and it works beautifully.

I mererly located JU1 and JU2 on the PCB. I removed the zero-ohm resisitor from JU2, and shorted the solder pads of JU1 together, and voila! I now have a switch that lets me enable/disable TX any time I want/need to.

Thanks to everyone that replied!

Regards