Will probably work ok with longer leads, but with increasing issues such as birdies due to vfo harmonics mixing with the bfo, perhaps rf getting into the volume pot leads causing speaker noises when you transmit, perhaps clicks as you change frequency. ?Maybe even a 50hz jump in frequency when you press the PTT key. ?Hard to predict.
The wire pair from Raduino to DDS connector on the Bitx40 would be my first concern. ?At least twist them together, better would be to replace that wire pair with some skinny flexible coax (50 or 75 ohms). ?Also twist or use coax for the antenna connector. ?Other connectors (two power connectors, speaker, ptt, mike, volume control center pin to ground) might want 0.01uF (or 0.1uF?) RF bypass caps. ?If you try any of this stuff and find it helps, do report back. ?The WireUp section recommends adding that 0.1uF cap across the tuning pot from center to ground, I'd recommend another such cap at the far end of those two tuning cap wires soldered directly to the Raduino pins. ?
I've kept my leads fairly short, twisted the antenna and DDS wire pairs, added a tuning pot cap at the Raduino. ?Good enough for me.
Jerry, KE7ER
On Fri, Mar 24, 2017 at 09:31 am, Daniel Acevedo wrote:
Reading the "Wire Up" manual, it says to Keep all the leads short. I am wondering if anyone has had any problems having the leads as long as they come.?
I am planning on only keeping the leads long of the raduino because I will have a enclosure that has front panel with hinges. Everything else will be kept relatively short.
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