How to assemble an Collins filter + Board for FT-817/857 and save $$$!!!
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You can buy a genuine Collins 500hz CW filter for about $103 (from Japan, UK etc.) and solder it yourself to an FT-817 compatible board made by Artur, SP6AB. He sells them as a service to fellow hams for $16. Contact Artur to confirm pricing and availability:?sp6ab@....?
73, Howard, W6ZZ Here's one possibility to buy a genuine Collins filter (w/o board): AOR MF-500 500Hz MF Series Collins Mechanical Filter 526-8693-010 radio
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W6ZZ