Contact your cable brand supplier! They will be happy to provide you with a tiny booklet that gives you the loss per foot per freq. and a myriad of info on the various sizes of coax from rg-59 t0 1.125 etc. coupled with insertion losses etc. etc. ets.. Handy little booklets but ya still gotta do the math. Later, Mike M.
This is CABL.com posting #172270. Tiny Link: cabl.co/mSYI