{Collins} Performance of Inrad 705S and 707S filter for 75S3-b

Hi, am wondering if anyone is using the International Radio (Inrad)  cw 
and am filters in their 75s receivers and what the performance is 
versus the comparable Collins filters - looking in particular for a cw 
filter and the cost of the Collins cw filter has seemed to have climbed 
as supply decreases around the country.  Many thanks in advance.



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