Filter LPF N2ADR

[Jatteau Marc]

192

Hello everyone Do you know if there's a reseller in Europe for an N2ADR filter? Or are there other models that would work with a Radioberry? Using i2C or perhaps a homemade one

[G4ZAL]

N2ADR filter board is only available from Makerfabs in China.
This control board will work (the radioberry thinks it is an N2ADR board)

https://github.com/ea3igt/HL2-PA70/

Nigel, G4ZAL

[Malcolm Bay]

Hi,

I used the QRP Labs switched LPF kit >> Ultimate relay-switched LPF kit together with a MCP23008/ULN2803 combo.

To be clear there is a fair amount of work to do to build this, but works perfectly for me.

If of any interest I can dig out the schematic (hand drawn!)

Malc
M0MBO

On 27/08/2026 17:13, Jatteau Marc wrote:

192

Hello everyone Do you know if there's a reseller in Europe for an N2ADR filter? Or are there other models that would work with a Radioberry? Using i2C or perhaps a homemade one

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[jatteaumarc]

---

From:	Jatteau Marc <jatte...@gmail.com>
To:	Radioberry <radio...@googlegroups.com>
Date:	jeu., août 27 2026 04:13:27PM UTC+00:00
Subject:	Filter LPF N2ADR

56

Hello everyone Thank you for your replies. 73 from Marc F6GKG

192

Hello everyone Do you know if there's a reseller in Europe for an N2ADR filter? Or are there other models that would work with a Radioberry? Using i2C or perhaps a homemade one