Re: BPF 80m


Alan G4ZFQ
 

I have built a number of these bandpass filters, and, with the exception of the 80 meter filters, the insertion losses have all been below 2dB. I have been unable to achieve a loss of less than 5dB on either of the two 80 meter filters I have built.
I cannot answer your question but why worry?
On 80m it will not matter, antenna noise is high, an attenuator is probably more useful rather than lower loss.

73 Alan G4ZFQ

Join QRPLabs@groups.io to automatically receive all group messages.