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*STOP PRESS* Coronavirus. A lot of Clubs have already cancelled all activities. Check carefully before you plan any travel

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CANCELLED because of coronavirus. Papplewick Pumping Station, Nottingham, Sunday 12th & Monday 13th April
CANCELLED because of coronavirus. Bournville Sub Day, Sunday 10th May 2020

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(CANCELLED) Submarine, Boating & Sailing Weekend, Norwich MBC, Weekend of 25,26th July

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Model Boat Convention, Haydock Park (Cancelled this year)

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CANCELLED. Bournville Sub Day, Sunday 13th September

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(CANCELLED) Club Submarine Regatta, Furness MBC, Barrow in Furness, Sunday 20th Sept 2020

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    high power rf amp for low frequency

    johnrobinson
    johnrobinson
    Guest

    Posts : 97
    Join date : 2011-06-10

    high power rf amp for low frequency Empty high power rf amp for low frequency

    Post  johnrobinson on Fri Nov 23, 2012 4:11 pm

    this is a picture of a RF power amp that i have been building for the last few days it is for transmitting low frequency under water to the sub it will nock out 160 watts of rf that is alot of power i ran it into a dummy load for 3 hours and ran ok the last post was about something on high frequency 10ghz this is the other end of the scale low frequency

    high power rf amp for low frequency Imag0310

    notice from the picture that i have still got to finish the unit off you can also see cpu cooler and they do a brillant job at cooling down componants that produce alot of heat and im afraid it dose

    high power rf amp for low frequency Imag0311

    the unit has been mainly made from scrap bits
    profesorul
    profesorul
    Guest

    Posts : 384
    Join date : 2011-07-03
    Age : 55
    Location : Bucuresti, ROMANIA

    high power rf amp for low frequency Empty Re: high power rf amp for low frequency

    Post  profesorul on Fri Nov 23, 2012 7:05 pm

    HI,
    The Device it self is going to do WHAT actually?!.

    MARIUS
    avatar
    Tom(ADMIN)
    AMS Forum Owner

    Posts : 2999
    Join date : 2010-11-05
    Age : 60
    Location : Nevada, USA

    high power rf amp for low frequency Empty Re: high power rf amp for low frequency

    Post  Tom(ADMIN) on Fri Nov 23, 2012 8:03 pm

    John, me old love...what on earth is that? And what the hell does it do?

    Get back to something that we can build, please...you're frightening people off. A nice simple BEC build, together with an explanation of what does what will be ideal, mate.
    johnrobinson
    johnrobinson
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    Posts : 97
    Join date : 2011-06-10

    high power rf amp for low frequency Empty Re: high power rf amp for low frequency

    Post  johnrobinson on Sat Nov 24, 2012 6:12 pm

    HI GUYS
    You asked what the RF power amp does the low frequency transmitter that i did for controlling the sub under water this power amp plugs in to that unit and amplifies from 10 watts up to 160 watts this then plugs in to a antenna which is in the water to control the sub, because this is on low frequency it will get through the water a lot better than using 40MHZ. I am trying to keep this as simple as i can and just in case you are wondering why the antenna is in the water where the sub is if the antenna was on the bank side most of the signal would bounce off the surface of the water like skimming pebbles only this would be the RF signal but if you put the antenna in the water then you would cut down on loses. Trying to work out antennas to work under water is quite difficult. Sorry to say chaps if you now can not see what I'm up to then i give up. I'm not trying to scare people off just won't them to see what you can do if you look out side the box
    John
    Giovanni LiCalsi
    Giovanni LiCalsi
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    Posts : 170
    Join date : 2010-11-15
    Age : 70
    Location : Alameda, California, USA

    high power rf amp for low frequency Empty Re: high power rf amp for low frequency

    Post  Giovanni LiCalsi on Sun Nov 25, 2012 1:10 am

    I know. I'm listening.

      Current date/time is Wed Sep 23, 2020 12:21 am