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Latest topics

» WW2 mini sub build
Graupner X-408 Transmitter EmptyFri Sep 30, 2022 12:17 pm by SimonH

» 27Mhz - Radio Ideas
Graupner X-408 Transmitter EmptyWed Sep 28, 2022 5:55 pm by tsenecal

» USS Bluefish
Graupner X-408 Transmitter EmptyWed Sep 28, 2022 5:48 pm by tsenecal

» Choice of CAD software and Printer for 3D printing
Graupner X-408 Transmitter EmptyMon Sep 26, 2022 11:35 am by david f

» 915mhz / 868mhz as a viable frequency for submarines.
Graupner X-408 Transmitter EmptyThu Sep 22, 2022 12:35 pm by geofrancis

» JSN-SR04T Depth sounder
Graupner X-408 Transmitter EmptySat Sep 10, 2022 11:19 am by geofrancis

» Grantham Model Sub Day, Sunday 14th August 2022
Graupner X-408 Transmitter EmptyFri Aug 12, 2022 2:48 pm by david f

» Sheringham 2022
Graupner X-408 Transmitter EmptyThu Aug 04, 2022 1:51 pm by david f

» Craycraft WTC
Graupner X-408 Transmitter EmptySun Jul 24, 2022 4:52 pm by timgarrod

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    Graupner X-408 Transmitter

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    Kevin D


    Posts : 129
    Join date : 2014-04-24
    Age : 60
    Location : Norwich

    Graupner X-408 Transmitter Empty Graupner X-408 Transmitter

    Post  Kevin D Wed Aug 20, 2014 10:53 pm

    I have purchased two NOS Graupner X-408 40mhz 4 channel transmitters without receivers. Does anyone know what make receivers are compatible with these, other than Graupner. I have tried my Futaba receiver but that does not work.

    Hoping these aren't lame ducks !!!
    david f
    david f
    AMS Treasurer


    Posts : 2268
    Join date : 2010-11-10
    Age : 72
    Location : Cumbria

    Graupner X-408 Transmitter Empty Re: Graupner X-408 Transmitter

    Post  david f Tue Aug 26, 2014 12:00 pm

    I have had a look at the (English) instruction manual for these and all the basics look fine, because it is:
    - FM
    -PPM
    -1.5 m seconds range for the servos.

    If your Futaba receiver had the right crystals you should have got some response.

    Anyone any ideas?

    David


    Last edited by david f on Wed Aug 27, 2014 12:09 pm; edited 1 time in total
    avatar
    Kevin D


    Posts : 129
    Join date : 2014-04-24
    Age : 60
    Location : Norwich

    Graupner X-408 Transmitter Empty Re: Graupner X-408 Transmitter

    Post  Kevin D Tue Aug 26, 2014 12:34 pm

    Thanks David, I hadn't really thought about crystal compatibility, I had 40mhz Futaba compatible crystals in both TX and RX.

    I haven't generally experienced any issues with mix and match on my 27mhz gear which I use for fast electric boats, so I didn't really think about it.

    Could that be my problem?
    david f
    david f
    AMS Treasurer


    Posts : 2268
    Join date : 2010-11-10
    Age : 72
    Location : Cumbria

    Graupner X-408 Transmitter Empty Re: Graupner X-408 Transmitter

    Post  david f Wed Aug 27, 2014 12:12 pm

    Crystals are a bit of a black art but I thought Futaba would be some sort of standard.

    You've presumably got the right type in the receivers (Dual or Single conversion.)

    Anyone any experience of Graupner and crystals?

    David

      Current date/time is Sun Oct 02, 2022 1:09 pm