I'm building the Elecraft AF-1 Audio Filter. My PCB has "REV A" printed lower left. I see pictures of a "REV XA" on the web, but mine definitely say "REV A" only. The "REV B" manual http://www.elecraft.com/manual/E740102%20AF1%20Active%20Audio%20Filter%20Rev%20B.pdf shows that modifications are needed at both J1 AF IN and J@ AF OUT jacks, I did the J1 - AF In mod, but see that my PCB is different than that shown in the REV B manual.
The manual show this http://i29.photobucket.com/albums/c290/cbjesseeNH/AF-1-2_zpsfzrvndif.jpg My PCB board looks like this http://i29.photobucket.com/albums/c290/cbjesseeNH/AF-1-1_zpsxstny3c8.jpg The reason for the mods are given as: The PC Board traces for the AF1’s audio input jack J1 and output jack J2 were wired to only the “ring” connection of the stereo tip-ring-sleeve jacks. If you are using stereo mini-phone cables this will not cause a problem, but a mono plug will not provide any audio into the AF1 as the J1 “tip” is unconnected. Additionally, the AF1 J2 Output jack should have the tip and ring connections wired together so that stereo headphones work correctly. Saturday and Elecraft is closed, so I thought I'd ask advice here, thanks. BRET/KC1CJN -- View this message in context: http://elecraft.365791.n2.nabble.com/AF-1-Rev-A-J2-AF-Out-Looks-Different-tp7618771.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
