[TenTec] 500 HZ Roofing Filter Attenuation-Orion

[Toby Pennington]

I have noticed that on 20 mtrs  with all the roofing filters turned on to AUTO, that there is considerable attenuation of receiver audio when the bandiwdth hits the 370 HZ level.  Of course I am down in the cw portion of the band. It doesn't seem to bother loud signals but does indeed surpress weak signal reception when the bandwidth is anywhere between 370 HZ down to 200HZ.  At 190 Hz the audio comes back up because then the 250 HZ filter kicks in.  I can turn the 500 HZ filter off and the audio is normal strength level. Does anyone else notice this or does this sound like a bad 500HZ  roofing filter?   One other thing, I don't seem to notice it on the low bands, but 20 mtrs and above it is most noticeable.  I noticed in the QST review of the Orion the reviewer noted a somewhat  similar observation with the 500 HZ filter.  Toby W4CAK