[1000mp] remove top or bottom cover for filters on Mark V?

Julio Roque/Bits [email protected]
Sat, 5 Oct 2002 15:17:31 -0400


Thanks Hans.

Unfortunately, I guess, I found a deal to buy 6 of the Yaesu filters for 
$400 and couldn't pass it up. One thing I noticed on another Yaesu radio 
loaded with Inrad's is that engaging the CW filter will generate an amount 

of noise by-product. I don't hear as much of the noise on the radio with 
the Yaesu filters but this could be due to the sharper skirts on the 
Inrads.

Taking a queue from my audio hobby, it appears as if the audio is not just 

bandpassed but compressed into the narrow bandwidth of the filter and then 

amplified to compensate for level loss. This produces some unwanted 
overtones which, unluckily, seem to be right on the CW pitch you're trying 

to zero-beat on. I don't know much about IF stages but that doesn't happen 

as pronounced in the audio world. I can take a CW audio recording, load it 

into Sound Forge and come up with a pristine sounding CW tone; very little 

noise left and none added. It would be really great if somehow we can 
digitize the IF stages and process it in our computers.

Mandatory 1000MP subject: I'm finding myself tuning the bands with the Mem 

Ch button rather than the nice, large VFO wheel. Lacking the function 
found on my FT-847 where the Mem Ch button will round the freq to the 
nearest integer, would it be useful to write a program that does it as one 

turns the VFO?

Regards,
Julio
K4JRG

>Not only the shapefactor of the Inrad filters is one of the best, but 
they
>have very good audio too; more natural.