[Kenwood] Inrad filters

[Steve H]

After asking a Kenwood expert he said Inrad (International radio) makes good
filters for lots of radios.

"For a TS-830S, a pair of their 400Hz (1st-2nd IF) filters will put the
stockers so far to shame it's not funny."

I am guessing he means these:
https://www.inrad.net/product.php?productid=220&cat=55&page=1

Has anyone ever used their stuff before? Kind of expensive.

Steve
KA2PTE