*Hi, I have been following this thread for a while now and maybe I have misplaced the issue.
What is there to fix Igor? I ask this so that I can better understand your concern and application as I don't recall anyone else chiming in on a 'fix' if something is indeed wrong. Always willing to learn. 73's Gary * On 15 March 2011 12:13, Igor Kosvin <[email protected]> wrote: > 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: [email protected] > [mailto:[email protected]] 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 <[email protected]> > 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<[email protected]> > >> 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:[email protected] > > 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:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- *VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!!* ______________________________________________________________ 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
