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» UHF radio control for submarines (openLRS, LoRa, FSK etc. on 458Mhz and 433Mhz )
Graupner X-408 Transmitter EmptyToday at 9:05 am by david f

» David Forrest's R class
Graupner X-408 Transmitter EmptyFri Jul 19, 2024 1:00 pm by david f

» Futaba -868/915mhz equipment
Graupner X-408 Transmitter EmptySun Jun 09, 2024 10:47 pm by tsenecal

» Darnell type 21 submarine, need some help
Graupner X-408 Transmitter EmptySun Jun 09, 2024 9:35 am by Deep Diver (Fred)

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Graupner X-408 Transmitter EmptySat Jun 01, 2024 1:15 am by geofrancis

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Graupner X-408 Transmitter EmptyTue May 28, 2024 8:30 am by Deep Diver (Fred)

» WW2 mini sub build
Graupner X-408 Transmitter EmptyWed May 22, 2024 8:10 am by david f

» Peral Submarine of 1888
Graupner X-408 Transmitter EmptyMon May 20, 2024 1:00 pm by david f

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Graupner X-408 Transmitter EmptySun May 19, 2024 11:02 am by stig58

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2 posters

    Graupner X-408 Transmitter

    Kevin D
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    Kevin D


    Posts : 129
    Join date : 2014-04-24
    Age : 62
    Location : Norwich
    • Post n°1

    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 !!!
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    david f
    david f
    david f
    AMS Treasurer


    Posts : 2407
    Join date : 2010-11-10
    Age : 73
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    • Post n°2

    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
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    Kevin D
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    Kevin D


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    • Post n°3

    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?
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    david f
    david f
    david f
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    • Post n°4

    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
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