Topband: Signal source RF amplifier

[GEORGE WALLNER]

Hello Steve,
I have built exactly what you are looking for: a small 200 mW transmitter 
that can be attached to a drone (including battery).
For the "PA" stage a I used a 74HC244 buffer, with all the gates paralleled, 
feeding a resonant tank wound on a ferrite rod, which is also the antenna. 
The battery is a single 3.7 V 500 mAhr LiPO. My -30 dBi two element loaded 
loop array can "hear" it from about half a mile, far enough to do RX antenna 
pattern measurements.
See : https://www.youtube.com/watch?v=JMujut_5FdY

GL and 73,
George
AA7JV/C6AGU




On Sun, 2 May 2021 18:46:49 -0600
  VE6WZ_Steve <ve6wz at shaw.ca> wrote:
>For field testing, I’m looking for some ideas for a very small RF amplifier to boost the output from a HCMOS 1.843 MHz oscillator.
> These oscillators will give me about 20 mW max, but I need a bit more since I plan to mount it on my small drone and will need a bit more range.
> My drone can lift up 130 grams, so I’d like it to run on a 5v supply. (maybe a 9v battery with regulator or 3 AAA cells)
>
> I considered something like a Mini Circuits PHA-13ln 21 dB monolithic amp, but not sure thats such a good idea.
> A 2N5109 base amp is a current pig and too heavy.
>
> Any ideas?
>
> 73, de steve ve6wz
>
>
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