Nice job - the end result is impressive! I love it when you find a simple and effective cure for noise.
@edwinklaver7 жыл бұрын
Thanks Peter. I was having the noise problem with my CDV. You filter worked great.
@mohinderkaur66712 жыл бұрын
a low dropout regulator would be smaller and more effective. holtek parts like HT7533 may work. A C multiplier may help too
@mumrah427 жыл бұрын
Great information for tracking down noise! I added this to my bitx40 and got rid of noise coming in from my switching power supply as well as from the DDS. I did hear the DDS noise coming in over the actual DDS line (not power line) but that was easily remedied with an inline filter capacitor (I used 220uF)
@Paul_VK3HN7 жыл бұрын
Good A/B test proves the DC filter's effect. Might be worth experimenting with a 1mH RFC in place of the resistor.
@vk3ye7 жыл бұрын
Thanks Paul - I did try a lower value ferrite but it had no effect. Besides resistors are cheaper and I had the box of them close at hand!
@MidlifeRenaissanceMan9 ай бұрын
I know this goes back to the before times, but I was wondering if you had considered the customary 0.1uF ceramic caps in parallel with the electros to compensate for the higher frequency stuff
@Paul_VK3HN9 ай бұрын
Wow this is a conversation in slomo. I would definitely parallel a 100nF. Not sure why it may have been left off. You cant have too many 100nF caps!@@MidlifeRenaissanceMan
@TheFretman27 ай бұрын
I bought a cheap Chinese DDS VFO and man it has a nasty output. The DDS VFO inputs into and also shares a power supply with a DC receiver. This little filter circuit removed most of the noise. I still hear some hum, but I think that once I've got the receiver in a metal enclosure, most of that will go away. Thanks!
@DavidGillooly7 жыл бұрын
Excellent demonstration of a good engineering practice!
@raafatalheety8267 жыл бұрын
Good video 73
@alessandrowyatt62713 жыл бұрын
you prolly dont give a shit but if you guys are stoned like me during the covid times you can stream all of the new movies on InstaFlixxer. Been watching with my girlfriend lately :)
@zevbraylon59783 жыл бұрын
@Alessandro Wyatt yup, have been watching on instaflixxer for months myself :D
@bradenglettkd8zm697 жыл бұрын
fantastic information!
@owenvinall99703 жыл бұрын
Excellent video and explanations thanks Peter. Vk5fkov
@OldF10007 жыл бұрын
A PI filter in a power supply goes to show There is no school like old school ; )