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    Converting a 35Mhz dual conversion receiver (Futaba) to 40Mhz

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    david f
    AMS Treasurer

    Posts : 1996
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    Age : 68
    Location : Cumbria

    Converting a 35Mhz dual conversion receiver (Futaba) to 40Mhz

    Post  david f on Sat Jul 16, 2011 11:16 am

    Dear John,
    (That sounds good!)

    Anyone know if this can be done simply?

    (There must be a few 35Mhz receivers of limited use abou the place now. Mine is fairly recent and cost quite a lot of money.)

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    johnrobinson
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    changing 35mhz to 40 mhz fm

    Post  johnrobinson on Sun Jul 17, 2011 4:41 pm

    HI David
    It is strange that you have asked this because i have just changed this week a 35 mhz futaba receiver to 40 mhz fm, for some thing i wonted to do in most cases the osillator for the 35 mhz crystal will retune to 40 mhz with no modes but you will have to change a couple of caps to a smaller value on front end of RX input and retune to 40 mhz can be done in ten mins
    john
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    Giovanni LiCalsi
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    Age : 68
    Location : Alameda, California, USA

    Graupner 40MHz Radio to Synthesized 75MHz

    Post  Giovanni LiCalsi on Mon Jul 18, 2011 4:34 am

    Across the pond in the USA we use 75MHZ for submarine use and I am converting a Graupner 40MHz radio to this frequency. The RF module, that I am using, is a HiTec Spectra Synthesized 75MHz RF.I'm wondering if there is a twin-stick, similar to my Robbe Nautical F-14, available to convert this radio?
    Kind regards,
    Giovanni



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    johnrobinson
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    converting TX unit

    Post  johnrobinson on Mon Jul 18, 2011 6:55 pm

    HI Giovanni
    You could try converting a FC-18 ROBBE FUTABA as i reworked one to work on 458 mhz to use in uav plane its a pitty you guys in the U.S.A use 75mhz would be better off on lower bands, what sort of power level are you allowed to use in the UK it is 100mw ERP
    john
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    david f
    AMS Treasurer

    Posts : 1996
    Join date : 2010-11-10
    Age : 68
    Location : Cumbria

    Re: Converting a 35Mhz dual conversion receiver (Futaba) to 40Mhz

    Post  david f on Tue Jul 19, 2011 9:32 am

    Hi John,

    I have a 35Mhz Futaba Dual Conversion, 8 channel receiver which I would like to have converted to 40MHz.

    I will pm you about it.


    David
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    Giovanni LiCalsi
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    Posts : 170
    Join date : 2010-11-15
    Age : 68
    Location : Alameda, California, USA

    Re: Converting a 35Mhz dual conversion receiver (Futaba) to 40Mhz

    Post  Giovanni LiCalsi on Wed Jul 20, 2011 7:17 am

    johnrobison wrote: HI Giovanni
    You could try converting a FC-18 ROBBE FUTABA as i reworked one to work on 458 mhz to use in uav plane its a pitty you guys in the U.S.A use 75mhz would be better off on lower bands, what sort of power level are you allowed to use in the UK it is 100mw ERP
    john
    Hello John,
    It seems that the mv limit is a mystery in the USA!
    Just type into the www.RCgroups.com search box and be dazed and confused!
    Please show me the Robbe FC-18 twin-stick conversion? I'm dying to add this to my Graupner MC-19.
    Regards,
    Giovanni

      Current date/time is Wed Dec 19, 2018 12:39 pm