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Author Topic: 500W LPF  (Read 3294 times)

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500W LPF
« on: June 15, 2024, 09:23:48 pm »
Been busy working the RadioBuilders own version of a 500W FM Broadcast LPF.

Here's a sneak preview of the PCB

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More details about this to follow.
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Re: 500W LPF
« Reply #1 on: June 15, 2024, 11:22:17 pm »
Looking really good. Defo want to give that a try when the boards are ready.
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Re: 500W LPF
« Reply #2 on: November 05, 2025, 10:02:04 pm »
Quote from: ZoZo on June 15, 2024, 09:23:48 pm
Been busy working the RadioBuilders own version of a 500W FM Broadcast LPF.

Here's a sneak preview of the PCB

(Attachment Link)

More details about this to follow.

Bottom view?
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Re: 500W LPF
« Reply #3 on: November 06, 2025, 12:55:47 pm »
Here's the Bottom view. its just a solid ground plane.

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Re: 500W LPF
« Reply #4 on: November 07, 2025, 07:08:02 am »
ZOZO please can you share a pdf or .lay
thanks .
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Re: 500W LPF
« Reply #5 on: November 07, 2025, 06:37:32 pm »
Quote from: ZoZo on November 06, 2025, 12:55:47 pm
Here's the Bottom view. its just a solid ground plane.

(Attachment Link)
This is not good is not geunine draw

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Re: 500W LPF
« Reply #6 on: November 08, 2025, 06:13:30 am »
It's genuine I can assure you. Please find Gerber attached below.

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Re: 500W LPF
« Reply #7 on: November 08, 2025, 06:27:51 am »
ZoZo thank you mate .
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Re: 500W LPF
« Reply #8 on: November 08, 2025, 07:13:01 pm »
Quote from: ZoZo on November 08, 2025, 06:13:30 am
It's genuine I can assure you. Please find Gerber attached below.
(Attachment Link)
in my posesion i heave one
also on background no copper !
« Last Edit: November 08, 2025, 07:30:02 pm by RIGMO »
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Re: 500W LPF
« Reply #9 on: November 09, 2025, 09:59:13 am »
Looks good Rigmo, I see it has a few extras for SWR monitoring. The Gerbers I shared are more or less a direct copy from the Dutch RF version, which as I recall has a full grounding plane on the bottom side.
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Re: 500W LPF
« Reply #10 on: November 09, 2025, 02:42:11 pm »
Quote from: ZoZo on November 09, 2025, 09:59:13 am
the Dutch RF version, which as I recall has a full grounding plane on the bottom side.
For that reason is not good! mine is created long time before Dotch pcb..
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Re: 500W LPF
« Reply #11 on: November 15, 2025, 08:34:35 am »
@ZOZO
can you supply the coil diameter handling 100W.
cu diameter and thread diameter
tanks.
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Re: 500W LPF
« Reply #12 on: November 15, 2025, 10:23:09 am »
Quote from: Radioclick1fm on November 15, 2025, 08:34:35 am
@ZOZO
can you supply the coil diameter handling 100W.
cu diameter and thread diameter
tanks.

I haven't got the data for that with me at present, but will get that posted here asap. But someone may post that sooner for you.
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Re: 500W LPF
« Reply #13 on: November 15, 2025, 11:34:25 am »

4 (Turns) Windings 8mm (ID) inside diameter

4 (Turns) Windings 9mm (ID) inside diameter

Air coils - 14 SWG - 2mm wire

Space between the windings about 1mm
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Re: 500W LPF
« Reply #14 on: November 15, 2025, 11:37:28 am »
L1 , L4    8mm ID
L2 , L3    9mm ID

14SWG wire
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