🚀 go-pugleaf

On Thu, 11 Nov 2004 07:33:57 GMT, Rich Grise <rich@example.net> wrote:

>On Thu, 11 Nov 2004 12:34:37 +1100, rigg wrote:
>
>> I have a tv modulator, ch0 46MHz, and I want to boost its output with a
>> simple one transistor amp connected to a short antenna so it will transmit
>> up to about 20 metres. I was thinking of using a 2N3866 in a class C
>> configuration with a 12v supply. Can someome give me advice on how to select
>> values or provide a simple circuit so I can do this? I am not sure how to
>> pick values when using a short antenna of 30 cm. I assume matching
>> impedances must come into this somehow... I have seen lots of circuits on
>> the web but they are for much lower frequencies. Thanks Rigg
>
>With proper antennas on each end, what you already have should be able
>to cover 20 meters distance, with no problem. 
>
>Well, except that a 1/2 wave dipole is a little over 3 meters long.

Overkill. The modest range could be achieved with the 30cm (or
whatever) wire taken from a suitable tapping point on the tank coil.
That should be all the matching necessary.
-- 

"What is now proved was once only imagin'd." - William Blake, 1793.