from "slick",,
Here's the deal.. You can buy an F1 Shooting Chrony for only $69 on sale but to "access" all the cool features like Hi, Lo, Average Dev, Standard Dev, extreem spread, etc you need to buy a "remote" or printer that plugs into the "FU" jack.. I thought it was funny that they called it an "F-U" jack since it's such a simple device to exponentially increase the usability of the device - FU obviously means "function" .
Anyways to build a remote you will need a 3 pole sterio 1/8 headphone jack plug. Even though only 2 connections are used a 2 pole jack WILL NOT work!!! Trust me on this as I had to go back and exchange parts.
On a 1/8 inch sterio headphone jack there are three poles - the tip, the middle, and the "base". Even though it is a two pole connection, the Chrony uses the middle and base connections on the plug. All you need to do is solder a length of speaker wire to the above mentioned poles of the plug and put a momentary contact switch at the other end!
Please note that the "tip" connection on the jack's plug is NOT used. I'm hoping that sharing this information will nudge few of my fellow loaders into plunking down for a Chrony now that all of the features can be accessed without purchasing expensive "Extras".