Hi, I went through something similar but it turned out to be the centre contact on the PTT IN phono socket in the K3S. I tested the voltage on the socket and everything seemed fine, also checked the cabling and microswitch on the foot switch. Upon further inspection it looked like the inner connection on the socket appeared to be splayed out slightly and just didn't make contact. In fairness I did get the odd occasion that it worked but was certainly not reliable. I had tried other phono plugs but to no avail. Rather than open up the box I slightly squeezed the phono plug on the footswitch to an oval shape. Not had a problem since. Must remember to fix the socket at some point.
Andrew G8BYB -----Original Message----- From: [email protected] <[email protected]> On Behalf Of kg6mzs Sent: 28 July 2020 17:11 Hello All, I've connected a Heil foot switch to to rear panel PTT In RCA jack and it doesn't key my K3. I searched the archives here and found that Don W3FPR had suggested testing the foot switch of another unfortunate, Dick K9OM, who suffered the same problem. This thread went unresolved, AFAICT. I've tested the Heil and it checks out. Any ideas as to why my foot switch will not key the K3? TIA, Eric KG6MZS ______________________________________________________________ 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]
