Dan, That sounds more like a Signalink problem than a K3 problem. Please monitor the voltage on the PTT input from the Signalink to the K3.
If the voltage when transmission is to stop is in the range of 3 volts, that is the problem - that voltage is in the indeterminate range for the typical logic levels. OTOH, if the PTT voltage from the Signalink goes reliably to 5 volts, then you have a K3 problem.
73, Don W3FPR On 7/13/2014 10:01 PM, Dan Sherwood wrote:
I have discovered an issue with my K3, (ser 5820). When using my Tigertronics Signalink USB device, the unit keys the rig fine, but when the interface unkeys, transmission ceases, but red XMIT light stays on and reception is muted. Like an indeterminate state. I did the following: Updated firmware no difference. Unplugged Signalink rig cable to r/o a short no difference. Ran a different digital program on laptop no difference. The rig is configured to accept audio input from the line in jack on the rear when placed in DATA-A mode. In SSB mode it accepts input from either the front panel or the rear MIC jack depeng on whether I am using a headset or the boom mic. PTT is asserted through a foot switch via the front panel MIC jack. This keys and UNKEYS normally. The Signalink assertes PTT through the PTT jack on the rear panel of the K3. It has an internal relay acting like VOX. When I use the signalink to key up in data mode, it works OK for a few cycles, then reverts to the indeterminate state. Rig will not receive until I tap one of the keys mentioned below. To rule out RF feedback issues, I keyed the signalink in SSB mode, so line-in not selected, Rig keys up but no power made, (signalink audio not selected). Problem persists. Normal CW and SSB using foot switch PTT and either full or semi break in CW has no issues, even when driving an amp and lots of RF. CW through FLDIGI uses CAT keyup and release. No issues there. PSK uses PTT asserted through rear panel. Issue seems with rear panel PTT only. Now here¹s the really strange thing: When in this indeterminate muted state, if I tap band up or down, mode up or down, AFX, XIT, or RIT keys, the unit goes back to normal receive. That initial tap DOES NOT perform the key¹s design function. This is like a computer keyboard when a screensaver is running the first keypress is ³swallowed² to wake up the screen, then subsequent keypresses work normally. Any ideas here? Thanks, Dan Sherwood W6DAS ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w3...@embarqmail.com
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