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On Sun, Jun 16, 2024 at 12:45 AM, W6ZZ wrote:

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

$111.67$67.00

12?IN STOCK

I looked on Google Street View and (with apologies to the seller) that really does look a little suspect to me, especially given the price and quantity left in stock. Due dilligence may reward either way.
?
--
Steve, G4VRR.