Hi guys !! Like many of you , I'm using an home-made internal antenna in my tanks ...<div>But no matter how good that antenna can be ; it's never as good as the original antenna ....</div><div>There's also the fact that I have a box full of unused receiver boards ( every time I have to replace an RX-18 board ; it comes with a new receiver board ...)</div><div>So I decided to use an extra receiver board as a pre-amp for the internal antenna ...
</div><div>In a normal receiver board , the antenna signal is amplified by Q1 and filtered by a network of coils and capacitors ; and fed to the mixer input : ( pin 16 of IC1 , ( MC3361 BP )) ...</div><div>I intercept that amplified & filtered signal and feed it to the antenna input of the main receiver board ....
</div><div>Here's a bunch of self explaining pictures ...
</div><div>Since I'm driving my tank in an apartment ; It's a bit hard for me to measure how much I extended my range ...</div><div>The only improvment I noticed is that without the booster , I have to fully extend the transmitter antenna to get a good reception ...With the booster , I have the same results with the transmitter's antenna extended only half way ...
</div><div>Some of you guys have been using an internal antenna outside and would be able to quantify in feet if there's any improvment in range should you decide to try the modification ...</div><div>I'd be gratefull for any feedbacks ....</div>