Guy, I think whatever you say makes sense. The only action when paddles are touched in receive mode with VOX off should be keyer side tone, right? Since the sound is software controlled without involvement of 7R signal (I assume this is correct), the rig should remain in receive mode and there is no reason for 7R line to drop down at all. What happens though that all transceiver except final stage goes to transmit. Even P3 freezes for a duration of the tone, sensing that K3 is in transmit. Oh, the TX LED is not activated. Maybe we should use TX LED signal to key amplifier? Kidding, just kidding... By the way, I think the KPA3 is not activated either by the paddles in receive without VOX. Both 7R and 7T are brought to the KPA3 and they are both used to correctly switch the T/R mode of the amplifier. Looking at the whole thing from other perspective. It may or may not be easy to fix, Elecraft chose not to fix and I am not going to jump off the roof because of this. I wish this would be my biggest problem in life. Maybe it is time to follow Joe's advice and "stop fussing about it". Maybe some day I will think about hardware mod to fix it, maybe not. As for now I will not pursue this anymore.
73, Igor, N1YX -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Guy Olinger K2AV Sent: Monday, March 14, 2011 5:52 PM To: Joe Subich, W4TV Cc: Elecraft Reflector Subject: Re: [Elecraft] K3 transmit/amplifier relay Joe, I do not understand what you mean by VOX in your assertion below. There is no VOX steady state input from anywhere. There is no VOX jack or ACC pin named VOX. There is a steady state VOX segment in the LCD display, but that is driven from the CPU across the LCDSCL LCDDI LCDCE LCDMODE multiplex lines. There is no VOX trace on the boards. The VOX input on the BAND- button is momentary. The CPU has to retain the steady state which means "the-operator-wants-VOX operation". You can call it anything you want, but the steady state, as evidenced by the lit VOX segment on the display, only exists in the CPU and somewhere inside the LCD display. Set your K3 to CW mode. Do not assert PTT IN at any time in the procedure below. Turn on VOX, key the rig via PADDLE or KEY, You get both keyed power out and "closure" on KEY OUT with the usual TR switching. The TX led lights roughly following the CW. Turn off VOX, key the rig via paddle or Key. You do not get power out, but you get closure on KEY OUT, and (with the hard connection to 7'r) the rig drops RX with the keying. The TX led does NOT light, even though the radio has done a 7R/7T flip. Whether you call VOX an input, a state, an imperative, or a glizzywichit, VOX on or off has no bearing on whether KEY OUT together with 7R is flipped by KEY or the results of PADDLE. Are you arguing that the behavior just described does not occur? 73, Guy On Mon, Mar 14, 2011 at 4:15 PM, Joe Subich, W4TV <li...@subich.com> wrote: > > > KEY OUT in CW mode is the logical or of straight key, internal > > keyer and PTT. Turning on VOX neither asserts nor gates KEY OUT > > No, when any of the (input) signals I named - straight key, internal > keyer CW, PTT or VOX (note VOX is an input *not* a control state) - > is active, Key Out is closed (low impedance to common). That is a > logical-or (more specifically logical-NOR since it is a low going > signal). It would properly be written: > NOT (Straight Key OR Internal Keyer OR PTT OR VOX) > > What you want is for PTT (input), VOX (input) or QSK (control state) > to gate the Key and Keyer. In other words, written as: > NOT (((Straight Key OR Internal Keyer) AND (PTT OR VOX)) OR > (PTT OR VOX OR QSK)) > > 73, > > ... Joe, W4TV > > > On 3/14/2011 3:59 PM, Guy Olinger K2AV wrote: > >> On Mon, Mar 14, 2011 at 3:01 PM, Joe Subich, W4TV<li...@subich.com> >> wrote: >> >> Key Out is the logical or of the key input >> >>> (straight key, internal keyer, PTT and VOX). >>> >>> >> WRONG. To use your terms and convention, as currently coded in firmware... >> >> KEY OUT in CW mode is the logical or of straight key, internal keyer and >> PTT. Turning on VOX neither asserts nor gates KEY OUT >> >> To prove that, place in CW mode, and hit the key or the paddle with VOX >> off >> and PTT not asserted. If your amp is connected, out of standby, and uses >> KEY >> OUT, it will change state with the CW. >> >> This *IS* a FIRMWARE directed behavior. It is not implicit in physical >> circuitry anywhere. The requested behavior change does not require a >> hardware change, even though the KEY OUT jack is a hard conversion of 7R >> from zero state to high voltage short at KEY OUT. >> >> When in CW mode, with neither VOX nor PTT asserted, leave the K3 in >> receive >> mode, use straight or internal keyer assertion to place monitor audio on >> the >> three RX audio DAC's only. This is entirely a firmware change, though >> possibly an ugly one. >> >> 73, Guy. >> >> ______________________________________________________________ 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 ______________________________________________________________ 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
