11-12-2016, 04:06 PM
(11-12-2016, 11:51 AM)Mark Hennessy Wrote: Come on Trev - no need to be defensive. I've read Michael's posts carefully - they contain interesting theory about the rod pentodes, but no criticism of your project.
Like many, I've enjoyed reading this and seeing/hearing the results. Ignoring the preamp, it's amazing what can be done with just one active device! Keep up the good work
Mark
Hi Mark.
Sorry if I came across as defensive, Michaels posts have always been helpful and have spurred me on with the rod valves, two comments though come across as this doesn't work. The proof of the pudding though is in the eating as they say, anyway lets not let it get in the way of this little project.
I've done a second video (cut off at the end though) this one with the pre amp, I'd say the third valve is unnecessary, the gains are small and frankly not really worth the effort.
Since the video I have changed the tank coil, it has upped the range outside from the shed to 25 meters and improved reception in the house no end.
I'll do a little video tomorrow with me taking a portable radio round the garden to give an idea of usable signal levels.
My video's have no airs an graces, you get real life rubbish videos I'm afraid, sad I was born with two hands not three
https://youtu.be/h3xKNB9e5XQ
Oh and thanks for the encouragement Mark
