I already have that in system.  My 2m LNA is getting overloaded due to frequencies below the 2m pass band (since the diplexer is LP/HP combo….

Herb

From: Thomas Schuessler <tjschuessler@verizon.net>
Sent: Thursday, November 16, 2023 8:14 AM
To: Herb Sims <herb.sims@mchsi.com>
Cc: amsat-bb@amsat.org
Subject: Re: [AMSAT-BB] Looking for a reasonably priced 2m Bandpass Filter

If all you’re looking for is to eliminate harmonics that head up into the 430 MHz band when transmitting on 2 m just put a dieuplexer in line and use the 2 m part of it and don’t hook up anything to the 70 cm side. Most of them do about 60 DB if attenuation outside of band and can handle 50 W.  And since you want to cheat, most of them are around $60.  

Sent from my iPhone

On Nov 16, 2023, at 04:18, Herb Sims via AMSAT-BB <amsat-bb@amsat.org> wrote:

Everyone,

I am looking for a 2m Bandpass Filter that is reasonably priced that is capable of 50W RF power.  I am aware of a company in Europe (antennas-amplifiers.com) that has a unit, but it is currently outside my budget.  I am also aware of using two diplexers system from Amsat.  Is there any company here in the US that has a BPF that you could recommend please?

Thanks

Herb

N4RG

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