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Thread: W3 head on remote XTL5000 W7 W9 interface board

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    Default W3 head on remote XTL5000 W7 W9 interface board

    I picked up a XTL5000 on the band I need. It came with the W series front with 2 DB25's. My setup in the car is for a W3 head. Can I plug the W3 head in or is a different front needed like the Spectra/Astro Spectra ?



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    With the xtl's there is only one type of DB25 interconnect and you are ok to plug the w3 head in, mid or high power all ok.
    I made a lead to extent my w3 mic, pin for pin

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    Great! Thanks now I don't have to try upgrading an Astro Spectra to P-25 9600

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    you are telling me that the W series XTL TIBS are all the same, that there is not a specific one for the W3???

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    Quote"
    you are telling me that the W series XTL TIBS are all the same, that there is not a specific one for the W3???

    Apparently not since I did the W9 to W3 head changeover and the radio will not power up. Basically I used the change control head command in the regular software and programmed the radio. Fortunately I just put the original codeplug back in and radio works again. I did notice that during the W3 to W9 update it said RAM MOD
    Last edited by US RADIOMAN; 01-12-17 at 06:01 AM.

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    The W3 head requires a special tib that supplies power to the w3 head. The tib for the w5,w7, and w9 will not work.

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    Quote Originally Posted by hillb125 View Post
    The W3 head requires a special tib that supplies power to the w3 head. The tib for the w5,w7, and w9 will not work.

    Well that seems to go against most posts about this, guess I will have to look at both schematics and find the difference. Hopefully it's not a big deal like the Astro Spectra with all that extra IC's on it.

    Well after checking it's not work messing with, it apparently has some level shift detectors for on/off and PTT. The part numbers are from the manual with explanations:

    HLN6883A/B (Standard W4, W5, W7, and W9 control heads)
    HLN6884A (Motorcycle W4, W5, and W7 control heads
    HLN6885A/B (W3 control head only)
    HLN6915B (W3 control head only)

    HLN6902C (Standard W4, W5, W7, and W9 control heads)
    HLN6901C (W3 control head only)

    W3 Hand-Held Control Head (HHCH) Interconnect Board
    The HLN6885 (W3 option) interface board has additional electronics to facilitate the power-control requirements
    of the Hand-Held Control Head (HHCH). The circuit is based around a D-flop (U601), which remembers the
    condition of the power switch. It controls a power MOSFET that switches power to SWB+ from the unswitched
    A+ supply. Unlike the other control heads, shorting the MIC_HI_J5 to ground toggles the condition of power ON/
    OFF. When the radio is On, the MIC_HI line is normally 9 V and, when the PTT is pressed, a typical microphone
    will bias between 4 and 6 V, so the threshold on a comparator (U602-2) is set to about 2.5 V for the ON/OFF
    condition. When the power is Off, bias is supplied by R609 through CR601 to allow the ON/OFF circuit to work.
    The other half of CR601 is to block the normal microphone phantom power from loading this circuit down when
    the radio is off.
    Regulator U603 between the SWB+ line and J5-22 (SW_B+_REG_J5) keeps alternator whine from coupling
    onto the MIC_HI line when supplying power to the control head during transmit.
    An RC time constant resets the D-flop to a known condition of Off each time a power source is actively applied
    to A+. Another comparator (U602-1) monitors the condition of a reset line on J5. J5-4 needs to be grounded for
    the D-flop to be allowed to toggle to the On condition. This is normally accomplished when the HHCH is
    connected to the J5 connector, either directly or through a remote "Y" cable.
    Ignition sense is accomplished through Q606, which allows Q602 to be biased on when the IGN line is high.
    This allows the radio to be turned off by the ignition switch of the vehicle without losing the memory of the last
    ON/OFF condition, which is maintained by the D-flop and A+.
    Another feature of the HHCH is POTT: Power-on-to-Transmit. If the D-flop is off, pressing the PTT button
    causes the MIC_HI line to momentarily go low enough to turn the radio on. It is assumed that no one would
    press the PTT unless they had the desire to transmit. This is useful if the operator has difficulty finding the On
    button in an emergency. The way to defeat this option, to prevent unintentional power-On, is to add Q605, R613
    and R614.
    Another difference from the other control heads is that the HHCH does not have internal VIP transistors for
    accessories, such as for horn and lights. This is facilitated by Q604 and Q603 on the interconnect board.
    The final difference is protection from reverse current from SWB+ back to the A+ source by using a blocking
    diode CR600. For this reason, devices connected to SWB+ can be as much as 0.8 V lower than the A+ supply
    source.
    Last edited by US RADIOMAN; 02-12-17 at 12:30 AM. Reason: Additional Info

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    You can use the W3 with a standard tib perfectly fine.

    The only thing that won't work is the soft power switch. You will need to manually jumper pins 22 and 20 to activate the ignition line and turn the radio on. Normally this is done using the circuit described above. Other than that, the W3 will function just fine and act as it should.

    I attempted to convert a standard TIB to a W3 TIB last year, and even with all the correct parts in place there are undocumented jumper settings that must be needed to get it to work properly. Needless to say it was easier to just buy the W3 tib.
    Last edited by axel; 02-12-17 at 01:43 AM.

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    Hi all... my first post!

    not an XTL but Astor Spectra

    Just read this thread and had a lightbulb moment. Now got a W3 head working on my Astro Spectra
    Added all the missing bits (within the dotted lines) on the schematic to a HLN6344E PCB, and after reading the posts twigged that I needed to remove JU631 which is accross CR601 (Which I had added).
    As mentioned in the post from 'US Radioman' CR601 should be reverse biased when the power is off to stop the rest of the radio mic circuit loading the pin! Obvious now I have RTFM!
    I've spent hours looking for 'Secret Jumpers', poured over the schematic for a couple of days too! Just needed guidance

    Thanks all.

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    Default Help!!

    Quote Originally Posted by US RADIOMAN View Post
    Well that seems to go against most posts about this, guess I will have to look at both schematics and find the difference. Hopefully it's not a big deal like the Astro Spectra with all that extra IC's on it.

    Well after checking it's not work messing with, it apparently has some level shift detectors for on/off and PTT. The part numbers are from the manual with explanations:

    HLN6883A/B (Standard W4, W5, W7, and W9 control heads)
    HLN6884A (Motorcycle W4, W5, and W7 control heads
    HLN6885A/B (W3 control head only)
    HLN6915B (W3 control head only)

    HLN6902C (Standard W4, W5, W7, and W9 control heads)
    HLN6901C (W3 control head only)

    W3 Hand-Held Control Head (HHCH) Interconnect Board
    The HLN6885 (W3 option) interface board has additional electronics to facilitate the power-control requirements
    of the Hand-Held Control Head (HHCH). The circuit is based around a D-flop (U601), which remembers the
    condition of the power switch. It controls a power MOSFET that switches power to SWB+ from the unswitched
    A+ supply. Unlike the other control heads, shorting the MIC_HI_J5 to ground toggles the condition of power ON/
    OFF. When the radio is On, the MIC_HI line is normally 9 V and, when the PTT is pressed, a typical microphone
    will bias between 4 and 6 V, so the threshold on a comparator (U602-2) is set to about 2.5 V for the ON/OFF
    condition. When the power is Off, bias is supplied by R609 through CR601 to allow the ON/OFF circuit to work.
    The other half of CR601 is to block the normal microphone phantom power from loading this circuit down when
    the radio is off.
    Regulator U603 between the SWB+ line and J5-22 (SW_B+_REG_J5) keeps alternator whine from coupling
    onto the MIC_HI line when supplying power to the control head during transmit.
    An RC time constant resets the D-flop to a known condition of Off each time a power source is actively applied
    to A+. Another comparator (U602-1) monitors the condition of a reset line on J5. J5-4 needs to be grounded for
    the D-flop to be allowed to toggle to the On condition. This is normally accomplished when the HHCH is
    connected to the J5 connector, either directly or through a remote "Y" cable.
    Ignition sense is accomplished through Q606, which allows Q602 to be biased on when the IGN line is high.
    This allows the radio to be turned off by the ignition switch of the vehicle without losing the memory of the last
    ON/OFF condition, which is maintained by the D-flop and A+.
    Another feature of the HHCH is POTT: Power-on-to-Transmit. If the D-flop is off, pressing the PTT button
    causes the MIC_HI line to momentarily go low enough to turn the radio on. It is assumed that no one would
    press the PTT unless they had the desire to transmit. This is useful if the operator has difficulty finding the On
    button in an emergency. The way to defeat this option, to prevent unintentional power-On, is to add Q605, R613
    and R614.
    Another difference from the other control heads is that the HHCH does not have internal VIP transistors for
    accessories, such as for horn and lights. This is facilitated by Q604 and Q603 on the interconnect board.
    The final difference is protection from reverse current from SWB+ back to the A+ source by using a blocking
    diode CR600. For this reason, devices connected to SWB+ can be as much as 0.8 V lower than the A+ supply
    source.


    Good Morning Sir,

    I am a police Captain at a local PD in Florida (North Port). We bought a couple used XTL5000 radios from another police department to use in a couple of admin cars. The radios came with the W3 control heads. My local Motorola shop advised they can't get the radios to power or work with the W3 remote mic head. can you offer any help or suggestions to get this to work? I can be reached at 941-429-7412 or 941-302-8322 if you would rather call. Email is flalawdawg@yahoo.com or work is mbaute@northportpd.com

    Thanks in advance!!

    Mike Baute

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