LPF

Everything technical about radio can be discussed here, whether it's transmitting or receiving. Guides, charts, diagrams, etc. are all welcome.
Post Reply
radium98
proppa neck!
proppa neck!
Posts: 973
Joined: Fri Aug 26, 2016 7:01 pm

LPF

Post by radium98 » Tue Sep 13, 2016 11:12 am

low pass filter of elenos for the one who want to experiment like me i post all necessary files but can anyone say how much could be dimensions of pcb layout
br.
http://imgur.com/AMuzHhi

http://imgur.com/4YJZMh8

http://imgur.com/ZumY6QI
Top
radium98
proppa neck!
proppa neck!
Posts: 973
Joined: Fri Aug 26, 2016 7:01 pm

Re: LPF

Post by radium98 » Tue Sep 13, 2016 9:37 pm

No one is able to help please.
Top
User avatar
yellowbeard
tower block dreamin
tower block dreamin
Posts: 343
Joined: Wed Jul 08, 2015 5:40 am

Re: LPF

Post by yellowbeard » Tue Sep 13, 2016 11:31 pm

From Fotoshop the largest coil is 32.5mm long in the first image, the text in the third image says it should be 13mm which is 2.5 times smaller. Dividing the overall size of the layout image gives 90x45mm near as damn it. The dimensions are not critical so long as the clearance for the capacitors is correct.
Top
radium98
proppa neck!
proppa neck!
Posts: 973
Joined: Fri Aug 26, 2016 7:01 pm

Re: LPF

Post by radium98 » Wed Sep 14, 2016 6:20 am

will see yellowbeard thanks i guess anyone having an lpf to homebrew for less than 100 watts .
Top
Albert H
proppa neck!
proppa neck!
Posts: 2957
Joined: Tue Apr 05, 2016 1:23 am

Re: LPF

Post by Albert H » Wed Sep 14, 2016 7:27 am

You can improve the filter performance by putting earthed screens between the coils. The screens need to be at least the diameter of the coils away from those coils, to prevent loading the coils and lowering their "Q".
"Why is my rig humming?"
"Because it doesn't know the words!" ;)
Top
Post Reply

Return to “Anorak Corner”