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
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
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 mailto: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
-----------------------------------------------------------
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
participants (2)
-
Herb Sims -
Thomas Schuessler