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Thread: Bluetooth Dongle For PMR446 Radio - Any Comments?

  1. #17
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    So in my case, I'm looking at this as my set-up:

    • SMH5 (for now - may upgrade later)
    • Zumo 550
    • Mobile phone
    • Kenwood radio
    • SR10 (+ SC-A0110 Kenwood 2-pin cable)


    But before I decide for sure on the SR10, can those of you who have experience with it please confirm the following for me:

    1. When using the radio, I can operate by VOX, rather than PTT?
    2. I connect my Zumo 550 (by bluetooth or aux cable) to the SR10?
    3. I connect my Kenwood radio (by cable) to the SR10?
    4. I connect the SR10 (by bluetooth) to my SMH5?
    5. I connect my phone (by bluetooth) to my SMH5?


    I'd like decent music audio, so as the SR10 can't provide that (music wouldn't be required when I'm using the radio anyway), and as music audio from the SMH5 speakers is shite when played from the Zumo and great when played from my phone, having my phone connected directly by bluetooth with my SMH5 is the only way to achieve that?

    Would it be the case that sharing music played from my phone with another SMH5 (by bluetooth) would provide proper stereo audio for both mine and the other SMH5?


    Thanks to the replies & comments on here, I'm finally getting to grips with what I've found to be a murky quagmire - few shops have understood what I've been asking, let alone know the answers...

  2. #18
    Im not sure on the VOX ,but SENA SMH5 to SMH5 alone will operate on Vox so can't see why your set up won't

    Connect the Zumo to the SR10 via blue tooth will not be a problem.
    connecting the SR10 to the SMH5 will be a doddle.
    connect the SR10 to the Kenwood using the lead for it not bluetooth.

    Not sure on the music quality loss you are asking about .

    My set up is ,i connect the iPhone to the Nav. this is then linked to my Sena 10r . I use the kenwood with the supplied PTT and lead through the SR10 to the 10u. If I am listening to music from the nav and the Kenwood comes live, the music drops out till the transmission is done , then kicks back in.

    With the SR10, you will get a handbook showing around 10 different ways of connecting various components.

    Be patience as it can be stressful setting it all up, I would say add one thing, try it then add another in time, If you try to add all the items you are asking about you will be choking it in the bin in frustration ,good luck

  3. #19
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    Thanks. Yep - playing around with this stuff usually lets you get the optimal set-up.

    Same 320kbps mp3 file transferred from my laptop to my phone SD card & to my Zumo 550 SD card. Sounds shite played from the Zumo, sounds great played from my phone (Xperia M4 Aqua). I don't know why, but it does. Maybe later/newer Zumo are better?

  4. #20
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    Quote Originally Posted by DC View Post
    Nope , you pair the phone to the GPs , then the GPs to you helmet , that's linked in as one pair then .
    Unless you want to listen to music from the 'phone, then it doesn't work (at least not with a TomTom Rider 400)

  5. #21
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    Quote Originally Posted by PhaedrusMC View Post
    Same 320kbps mp3 file transferred from my laptop to my phone SD card & to my Zumo 550 SD card. Sounds shite played from the Zumo, sounds great played from my phone (Xperia M4 Aqua). I don't know why, but it does. Maybe later/newer Zumo are better?
    I could be wrong, but I don't think the 550 supports A2DP (the Bluetooth protocol for decent quality audio) so it's playing the music via the 'headset' profile (which is great for speech, but pants for almost anything else). I think A2DP support was introduced on the 660.

  6. #22
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    The SR10 user manual says the following:

    By double-tapping the PTT button when the audio channel is not open, the audio channel will open and remain open until manually closed by double-tapping the PTT button again.

    That sounds like what I need - that the audio channel remains permanently open, so that the VOX operation of my SMH5 then works just it would normally, transmitting when I speak.

    Is this what you guys take from that?

  7. #23
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    Perhaps you guys can help me. I have been using a Midland G8BT paired with a Midland BT2 headset. I have now swapped headsets to BMW Communications system and am struggling to activate the radio. it pairs up fine but I haven't found a way to activate the audio channel. Perhaps the double tap will work, a lot of these modules are the same. Any advice would be welcome. Yes I know I shouldn't have changed headsets!

  8. #24
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    Quote Originally Posted by PhaedrusMC View Post
    The SR10 user manual says the following:

    By double-tapping the PTT button when the audio channel is not open, the audio channel will open and remain open until manually closed by double-tapping the PTT button again.

    That sounds like what I need - that the audio channel remains permanently open, so that the VOX operation of my SMH5 then works just it would normally, transmitting when I speak.

    Is this what you guys take from that?
    I would assume that means that when you double-tapp the PMR will continuously transmit. There is no 2ways comms with PMR, you have to take it in turns....

  9. #25
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    Quote Originally Posted by jimbo View Post
    I would assume that means that when you double-tapp the PMR will continuously transmit. There is no 2ways comms with PMR, you have to take it in turns....
    Yep, that's how I've been operating with an Autocom + PMR446 set-up; one-way transmit, which is fine.

    I have an SR10 now. Paired fine with my SMH5, connected to a Kenwood PMR446, and transmitting fine via PTT. Struggling so far to get it to operate permanently-open. Double-tapping (either the PTT button on the SR10 unit or the separate PTT button) doesn't seem to create a permanently-open transmission. Not yet had a long session working on it, so if it can be done (as the manual says it can) I'm sure I'll figure it out.

  10. #26
    Quote Originally Posted by PhaedrusMC View Post
    Yep, that's how I've been operating with an Autocom + PMR446 set-up; one-way transmit, which is fine.

    I have an SR10 now. Paired fine with my SMH5, connected to a Kenwood PMR446, and transmitting fine via PTT. Struggling so far to get it to operate permanently-open. Double-tapping (either the PTT button on the SR10 unit or the separate PTT button) doesn't seem to create a permanently-open transmission. Not yet had a long session working on it, so if it can be done (as the manual says it can) I'm sure I'll figure it out.
    I recall a mate try this too, on the same set up. Kenwood sena sr 10 but a sena 10 r headset, he couldn't get the channel open by double tapping the the big button, after practice he removed the PTT, then did a double tap and it stayed open, it seemed as if the PTT connected to the Sr 10 would over ride this facility....

  11. #27
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    Quote Originally Posted by DC View Post
    I recall a mate try this too, on the same set up. Kenwood sena sr 10 but a sena 10 r headset, he couldn't get the channel open by double tapping the the big button, after practice he removed the PTT, then did a double tap and it stayed open, it seemed as if the PTT connected to the Sr 10 would over ride this facility....
    Thank you sir! I take it you mean a double-tap on the PTT button on the SR10 unit itself. I'll try that tomorrow.

  12. #28
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    Music will always sound bad on a Zumo 550 as it is old tech and streams music in mono rather than stereo.

    For better music you will need to upgrade your gps. I have had a Zumo 590 and now a BMW Nav V. The music quality on both are very good on my Schuberth SRC system. As others have said. Pair phone to gps and gps to helmet. That way there is no interference and you only use up 1 channel on you headset.

  13. #29
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    Re PTT / VOX...

    Seems there's a terminology issue at play here, for me at least.

    "Audio channel open" in this case seems to mean making a connection between radio-radio, and not actually transmitting.

    Double-tapping the PTT (on the SR10 unit or on the remote PTT button) seems to leave the connection permanently open (I can hear constant/continuous hiss/noise in my earphones), but unless I press the PTT button, it doesn't transmit.

    Without double-tapping the PTT button, there's no hiss/noise in my earphones, and I still need to press PTT to transmit, though there seems to be a moment of delay after pressing the PTT button before the audio channel opens (confirmed by the hiss/noise), letting me then transmit.

    Disappointed with no VOX (and with my own misinterpretation of what "open audio channel" means), but otherwise happy.

  14. #30
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    I bought a cigar lighter power lead for my SR10.
    I unscrewed and discarded the plug body, replaced the plug connectors with flying leads, used heat shrink sleeve to protect the PCB, then connected the flying leads to a supply from my PDM60.
    I have a Kenwood radio with a battery eliminator which is similarly powered.

    Batteries? We don’t need no stinking batteries!

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