Re: [Elecraft] K3 - no output power

Just some notes for future folks reading this. I always replace D1 and Q6 together. Other notes re Q6 and D1; 1. Poor RX on 24 and 28Mhz 12m 10M only and TX gain is OK. Q6 a 2N7002, OR D1  on the LPA can Suck the RX down on these two bands!! 2. Slow ramp up of TX power output. Typically worse

Re: [Elecraft] K3 - no output power

Hi all, just wanted to let you know that my K3 is back again with full output power. We found the Diode D1 on the LPA board. On the anode side, it had shown full power, on the other side, nothing. When unsoldering it, it was already very loose. The diode itself was intact, but had no contact

Re: [Elecraft] K3 - no output power

Chris; Since you EE INIT-ed your radio, you MUST re-load a known-good saved configuration! Or setup all options, filters etc and do the transmit gain calibrations. An EE INIT reset blanks the radio and sets it to ONE filter, (a 2.7, with no offset, in slot 1). Keith WE6R Elecraft K3/K4 Tech

Re: [Elecraft] K3 - no output power

Hello, together with Harald DD0VS, we narrowed it down to the diode D1 on the LPA board. I will now order the diode and some probably affected parts around the diode and start replacing and testing again. I will report again. Many thanks to all others with giving different hints! 73s Chris

Re: [Elecraft] K3 - no output power

On 3/24/2021 9:28 PM, Christian Janssen DL1MGB wrote: I don't have a spectrum analyzer, but I will look with my eyes if there is something noticeable. A frequency counter can also be a useful RF probe for your own TX 73, Jim K9YC __

Re: [Elecraft] K3 - no output power

;>> >>> DD0VS >>> >>> >>> >>> >>> >>> >>> >>> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für >>> Windows 10 >>> >>> >>> >>> *Von: *Chr

Re: [Elecraft] K3 - no output power

>> >> >> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für >> Windows 10 >> >> >> >> *Von: *Christian Janssen DL1MGB <mailto:ch...@dl1mgb.com> >> *Gesendet: *Mittwoch, 24. März 2021 21:05 >> *An: *elec

Re: [Elecraft] K3 - no output power

gt; >   > > *Von: *Christian Janssen DL1MGB <mailto:ch...@dl1mgb.com> > *Gesendet: *Mittwoch, 24. März 2021 21:05 > *An: *elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net> > *Betreff: *[Elecraft] K3 - no output power > >   > > Hello, > >   > &

Re: [Elecraft] K3 - no output power

arch 24, 2021 1:49 PM > *To: *Harald Fritzsche (DD0VS) <mailto:harald.fritzs...@dd0vs.de>; > elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net> > *Subject: *Re: [Elecraft] K3 - no output power > >   > > Hi Harald, > >   > > spectrum analyzer and m

Re: [Elecraft] K3 - no output power

@mailman.qth.net Subject: Re: [Elecraft] K3 - no output power Hi Harald, spectrum analyzer and more space on the table would be the best, but both not available :-) Additional information: - internal voltage / current (DISP) Standby: 13.8 V / 0.86 A Tune: 13.4 V / 3.20 A And still no power output

Re: [Elecraft] K3 - no output power

Does it receive? Wes  N7WS On 3/24/2021 1:03 PM, Christian Janssen DL1MGB wrote: Hello, it happened during the Russian DX Contest last Saturday, from one second to another. No output. When I tune the display looks like this: http://dl1mgb.com/temp/k3_no_power.jpg Following conditions: -

Re: [Elecraft] K3 - no output power

.com> > *Gesendet: *Mittwoch, 24. März 2021 21:05 > *An: *elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net> > *Betreff: *[Elecraft] K3 - no output power > >   > > Hello, > >   > > it happened during the Russian DX Contest last Saturday, from one se

[Elecraft] K3 - no output power

Hello, it happened during the Russian DX Contest last Saturday, from one second to another. No output. When I tune the display looks like this: http://dl1mgb.com/temp/k3_no_power.jpg Following conditions: - sending into a 50 ohm dummy load - no matter how many watts are set with PWR knob -

Re: [Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

I have the same thing here, Bruce. Something in firmware was changed a while ago and when I reported it to Wayne, he said that it is within specs. 73, Ken K3IU ~~~ On 1/9/2016 11:09 AM, Bruce Meier wrote: Today I noticed that the output power on

Re: [Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

This has nothing to do with the new synth. We're hoping to have another firmware release dealing with it soon. I've been working on other issues. 73, Wayne N6KR On Jan 9, 2016, at 8:09 AM, "Bruce Meier" wrote: > Today I noticed that the output power on 15 meters does

Re: [Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

I noted a similar issue and found that increasing the power supply voltage a bit returned full output. I think I have about 14.2v at the rig in receive mode. This was before I updated the synths so I don't think it's related to that. Vic 4X6GP/K2VCO > On 9 Jan 2016, at 6:09 PM, Bruce Meier

Re: [Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

I suppose "spec" would be about 1 dB or so. If so, then somewhere between 80 and 125 watts would be about right for a nominal 100 watt radio. I, however, didn't see and published spec for transmitter power in my K3S manual. 73 Bob, K4TAX On 1/9/2016 10:27 AM, Ken K3IU wrote: I have the

[Elecraft] (K3) Low output power on 15 meters (new KYSN related ?)

Today I noticed that the output power on 15 meters does not reach 100w. The max, according to the front panel meter reading, is 93w. So, I ran the transmitter gain calibration and it did not help. I decreased the power to 90w and it reached 90w, so I gradually increased the power and it is fine

[Elecraft] K3 - K144XV Output Power Range

Will the 1mw calibration have an effect on power output from the K144XV? I do not know if my Fluke 77s are an accurate RF voltmeters. Can I use an oscilloscope to adjust for 1mw? What P-P voltage setting should I set it to? Requested = RF Wattmeter at .224 Vrms = .6336 V p-p on scope

[Elecraft] K3 - No output power

Back in volume 117, issue 39 there was some chatter about having no output power from a K3. Whatever became of that issue? I have seen nothing since. I have a K3 that has no output power. If I key the rig while listening with an external receiver, I can hear what I am keying on the frequency

Re: [Elecraft] K3 : Unstable output power in DATA A mode

Don, San, Many thanks for your detailed advices. I have set up as you advised. Output in DATA A mode became stable with occasional glitch. I think I need to find the best setting for my system. Thanks again for your excellent advices. 73 de JH3SIF, Keith 2014/01/31 6:27、Sam Morgan

[Elecraft] K3 : Unstable output power in DATA A mode

Output power of my K3/100, SN 79xx, without KAT3 is very unstable in DATA A mode. The symptom is; 1. With setting 100W output on 14MHz and 10MHz, I get 100W output for a couple of seconds, then suddenly the output goes down to 10W or so. 2. On 7MHz and below, the output power never go up to

Re: [Elecraft] K3 : Unstable output power in DATA A mode

Keith, Have you adjusted your audio input to produce 4 bars solid on the ALC meter with the 5th bar flashing? If not, please do so - you can do that with the K3 in TX TEST mode so no signal is transmitted. After you set the audio level correctly, then adjust the power knob to the desired

Re: [Elecraft] K3 : Unstable output power in DATA A mode

then using the K3 in DATA A mode this often is caused by incorrect audio levels the k3's audio level should show 4 bars with the 5th bar flickering I have run my K3 with the 5th bar solid and it still worked ok the power out level is set by the K3's PWR knob most other rigs have a different

Re: [Elecraft] K3 Erratic output power

: From: Ian White gm3...@ifwtech.co.uk Subject: Re: [Elecraft] K3 Erratic output power To: 'Wes Stewart' n...@yahoo.com, 'Elecraft Reflector' elecraft@mailman.qth.net Date: Monday, March 4, 2013, 12:06 AM When first assembling the RF output connector and the KANT3/KAT3 board, I didn't like

Re: [Elecraft] K3 Erratic output power

...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on behalf of Ian White [gm3...@ifwtech.co.uk] Sent: Monday, March 04, 2013 1:06 AM To: 'Wes Stewart'; 'Elecraft Reflector' Subject: Re: [Elecraft] K3 Erratic output power When first assembling the RF output connector and the KANT3/KAT3 board, I didn't

[Elecraft] K3 Erratic output power

Has anyone come up with a permanent fix for the erratic output power problem?  I'm not talking about the 100W PA issue, but the issue solved (temporarily) by loosening and re-tightening the screws in the metal standoff on the output board near the coax connector. According to Murphy's Law,

Re: [Elecraft] K3 Erratic output power

Wes, I believe Elecraft has already implemented a fix for that in later K3s (starting about a year ago) - at least there was talk about doing it and supplying one 2D connector that was different then the others (with threads removed from thee hole). Removing the threads from the center hole

Re: [Elecraft] K3 Erratic output power

I'll give that a try.  Believe it or not, I worked TX5K on 20m RTTY while thumping the case during my exchange transmission. --- On Sun, 3/3/13, Don Wilhelm w3...@embarqmail.com wrote: From: Don Wilhelm w3...@embarqmail.com Subject: Re: [Elecraft] K3 Erratic output power To: Wes Stewart n

Re: [Elecraft] K3 Erratic output power

-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Wes Stewart Sent: 04 March 2013 01:45 To: Elecraft Reflector Subject: [Elecraft] K3 Erratic output power Has anyone come up with a permanent fix for the erratic output power problem?  I'm not talking about the 100W PA

[Elecraft] k3 transverter output power unstable

Hello, since mounting firmware 4.60, I have noticed that when I use WSJT software in K3 transverter mode the output power (0-1mW) is unstable. I see this expecially when I start new tx sequence. With previous firmwares , I didn't have any trouble. Does someone have this trouble, or similar

Re: [Elecraft] [K3] Lost output power...

Further info: I sat down today and performed another firmware load per Fred's sequence with no change. I then tested for any heat generation from the driver and finals of the LPA module and could not detect any. I dug out my old Tek 475A scope and did some signal tracing and verified that I

Re: [Elecraft] [K3] Lost output power...

Thanks for all the replies. I will try these suggestions tomorrow (working today) and post my results to the list for future reference. I will try the heat test on the LPA finals and driver first as I have all the panels off and it will be a quick way to find out if that is where the problem

[Elecraft] [K3] Lost output power...

Hi all, Before I contact service, I thought I might post my problem here in case it is something fairly simple. I returned from a 2.5 week vacation a couple of weeks ago and sat down to do the firmware upgrade to my K3. I had my K3 powered off and disconnected the antenna while away but it

[Elecraft] [K3] Audio Output Power ??

If I remember correctly, there are two different audio amplifier circuits in the K3. One for the speaker and one for the headphones (or, it may be more complex then that). Does anyone know the power output level of the speaker audio amplifier? 73, phil, K7PEH

Re: [Elecraft] [K3] Audio Output Power ??

The LM4950 is rated at 3.1W per channel to a 4 Ohm load with 1% THD+N. The spec sheet shows THD increasing significantly once output goes above about 2.3W into 4 Ohms, above about 1.8 Watts into 8 Ohms and above about 900 mW into 16 Ohms at 12V. THD is below 0.03% until the knee is reached.

Re: [Elecraft] [K3] JT65A output power variations

hb9ari wrote: DATA A is perfectly usable with VOX: i will migrate to this mode But there is no reason to use VOX for any digimode. WSJT supports PTT control. You have a fully wired serial cable connecting the PC and K3 which allows you to use it. The K3 is not like other radios

Re: [Elecraft] [K3] JT65A output power variations

[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julian, G4ILO Sent: Thursday, November 12, 2009 9:34 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] JT65A output power variations hb9ari wrote: DATA A is perfectly usable with VOX: i will migrate

Re: [Elecraft] [K3] JT65A output power variations

Joe Subich, W4TV-4 wrote: This does not work if one has a logging program that is using the K3's RS-232 port. As far as I know, no commonly used operating system permits more than one program to access a serial port at the same time which means that WSJT can not access the RTS/DTR

Re: [Elecraft] [K3] JT65A output power variations

Julian, I will look if this connection don't interfere with other programs and if ok, i will use it! Thanks for info! 73, Rudolf Julian, G4ILO wrote: hb9ari wrote: DATA A is perfectly usable with VOX: i will migrate to this mode But there is no reason to use VOX for any

Re: [Elecraft] [K3] JT65A output power variations

You could also use LP Bridge to share the serial port at the K3 among several programs running on your PC. This works quite well. 73, matt W6NIA On Thu, 12 Nov 2009 16:34:04 +0100, you wrote: Julian, I will look if this connection don't interfere with other programs and if ok, i will use it!

Re: [Elecraft] [K3] JT65A output power variations

Hi Matt, I've tried to use LP-Bridge with PowerSDR-IF (and LP-Pan) but with some losses of communication after some time; for this reason, i use HRD with Power-SDR without lock during many hours ( waiting for 50MHz apertures during Summer...). 73 QRO, Rudolf Matt Zilmer wrote: You could

Re: [Elecraft] K3- NO Output Power

Some things to check... - Check: Config TX INH needs to be set to false - Be sure that you are not in the test mode (TX is blinking) -- Press and Hold Mode Up/test to toggle - Connect dummy load, and press hold XMIT/Tune -- if this works, then the hardware is probably OK. - If in CW, Press

[Elecraft] K3- NO Output Power

My newly assembled K3 has no power output. I have tried all the configuration settings that might affect output. I have checked all the assembly procedures to assure I did all correctly. The 100 watt amp is not yet installed. I am convinced I have a hardware problem. I have sent a request for help

[Elecraft] K3 QRP output power level

Hello all, I am confused about the output level of the K3. What is the output power level of the 10 Watt version of the K3?. Is it the same on all bands? Do I have to reduce the output below 10 watts to avoid poor transmit intermod on SSB? I am asking this because I use my present K2 QRP radio

RE: [Elecraft] K3 QRP output power level

@mailman.qth.net Subject: [Elecraft] K3 QRP output power level Hello all, I am confused about the output level of the K3. What is the output power level of the 10 Watt version of the K3?. Is it the same on all bands? Do I have to reduce the output below 10 watts to avoid poor transmit intermod on SSB

Re: [Elecraft] K3 QRP output power level

Rich, The K3 output power is equal to or greater than the K2, so you should not have a problem. In addition, the K3 offers the ability to remember a power setting for each band, and that would likely be helpful when driving your amplifier. 73, Don W3FPR Richard Haendel wrote: Hello all,

[Elecraft] K3 - Wandering output power and ERR TXG

Sorryshould have indicated the above message is for K3!! Humbled (again) Stewart, GW0ETF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.):

[Elecraft] K3 - no output power

I have not yet determined the exact series of events, but something strange happens to both of my K3s. This weekend I have been participating in the Texas QSO Party. As it is both a CW and SSB event and multi-band I am doing jumps from band to band and mode to mode. Many times I get to the

[Elecraft] K3 :: PSK31 output power variation

My K3 setup is configured to put out about 30W on PSK31, with my sound card dedicated to APSK/AFSK modes and its output locked in place to make that power level at 1250 Hz. My TX IMD is excellent. However ... if I select a PSK31 spot where the resultant audio frequency is below, say, 800 Hz,

Re: [Elecraft] K3 :: PSK31 output power variation

Do you have TX EQ set? Leigh/WA5zNU My K3 setup is configured to put out about 30W on PSK31, with my sound card dedicated to APSK/AFSK modes and its output locked in place to make that power level at 1250 Hz. My TX IMD is excellent. However ... if I select a PSK31 spot where the resultant

Re: [Elecraft] K3 :: PSK31 output power variation

Steve, If you have the TX EQ set for a corresponding rolloff, then the answer is yes. Currently there is only one TX EQ that applies to all modes. Someday (soon) you can have separate TX EQ settings, but right now, TX EQ is TX EQ no matter what. 73, Don W3FPR Steve Jackson wrote: My K3

Re: [Elecraft] K3: SSB output power

I have excactly the same problem, also awaiting an answer Ian J Maude wrote: OK, I was waiting to see if the firmware sorted this but it has not. If I hold tune or use a key, I get full output power on my external meter. On SSB I get about 40-50W showing on peaks for a setting of

[Elecraft] K3: SSB output power

OK, I was waiting to see if the firmware sorted this but it has not. If I hold tune or use a key, I get full output power on my external meter. On SSB I get about 40-50W showing on peaks for a setting of 120W. This is the same whether into my trusty old Sommercamp YP-150Z or via the Bird

Re: [Elecraft] K3: SSB output power

hello ian and the list i have the same probleme here with serial 153 set to 100w and ssb only 40 to 45 W 73 terry F5MOO K3 #153 Ian J Maude a écrit : OK, I was waiting to see if the firmware sorted this but it has not. If I hold tune or use a key, I get full output power on my external

[Elecraft] K3/10 OUTPUT POWER

I have one of the new SPE Expert amps on order: http://www.linear-amp.com/ It requires 20W of drive for full output. Can one of the knowledgeable K3 designers/testers comment on nominal Po from 160--6M? Tnx, Dale W4OP ___ Elecraft mailing list

Re: [Elecraft] K3/10 OUTPUT POWER

Sent: Tuesday, July 03, 2007 9:46 AM Subject: [Elecraft] K3/10 OUTPUT POWER I have one of the new SPE Expert amps on order: http://www.linear-amp.com/ It requires 20W of drive for full output. Can one of the knowledgeable K3 designers/testers comment on nominal Po from 160--6M? Tnx, Dale W4OP

Re: [Elecraft] K3/10 OUTPUT POWER

I've been seeing about 14-15 watts but have not checked on 6m yet. Will do so this evening and report back. So far every contact has reported a very nice clean signal. Excellent CW note and audio quality using the 2.8 kHz filter for SSB TX. The TX EQ really makes a difference as well.

Re: [Elecraft] K3/10 OUTPUT POWER

] K3/10 OUTPUT POWER I have one of the new SPE Expert amps on order: http://www.linear-amp.com/ It requires 20W of drive for full output. Can one of the knowledgeable K3 designers/testers comment on nominal Po from 160-- 6M? Tnx, Dale W4OP

Re: [Elecraft] K3/10 OUTPUT POWER

On 7/3/07, Dale Parfitt [EMAIL PROTECTED] wrote: I have one of the new SPE Expert amps on order: http://www.linear-amp.com/ It requires 20W of drive for full output. Can one of the knowledgeable K3 designers/testers comment on nominal Po from 160--6M? Why not drive it at 10W and get a cleaner