[Lf] [Fwd: LF: LF exciter by ZL1BPU]

[Andre Kesteloot]

Dick Rollema wrote:

> To All from PA0SE
>
> The following is part of an e-mail I received from Murray, ZL1BPU.
>
> 73, Dick, PA0SE
>
>
>
>
>> I have just about completed the design of an LF Exciter using a
>> microcontroller. It is very simple (all the compexity is in the
>> micro), and
>> yet it offers very high performance on the LF bands. The synthesizer
>> uses
>> software DDS and a step size of 84 mHz (1/3 the JASON step). It
>> operates
>> ASK, FSK, DFCW, FELDHELL and MT-HELL, and I am at present testing it
>> with
>> JASON. It has a built-in beacon which also operates all these modes
>> and has
>> a 120 character message. The output is about 1W from 10 kHz to 250
>> kHz, and
>> it operates from 0 to 400 kHz.
>>
>> 73,
>>
>> Murray ZL1BPU
>



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