Re: [Elecraft] Intermittent loss of power output K3 - update
Subject: [Elecraft] Intermittent loss of power output K3 Good day Late last year, my K3 (no 6957) developed a fault. The symptoms were: 1. No power output when keying the rig 2. TX LED on when keyed, (sidetone generated in CW mode) 3. Single bar showing on the RF power meter, whatever scale, ie 0 - 10 or 0 - 100 4. ATU tune command: relays clicking, TX LED on, no power output, no indication on SWR meter; two horizontal dashes in the VFO A display area where normally one would see the resolving SWR; in VFO B area 5.0W is indicated 5. TX gain calibration failed on 5W and 50W; mW TX calibration gain OK Peter M0RYB Thank you to all who have responded to my post. The board connection pins are gold plated, and all look bright and shiny like new. The TMP connectors, however, all are tarnished on the outside, although the mating surfaces look clean; I will get some Deoxit and give them a going-over. The diodes D36 and D37 in the SWR bridge tested in situ showed a forward voltage of 0.362V and a reverse open circuit, so they seem to be fine. Peter M0RYB __ 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
Re: [Elecraft] DVR audio
Does FAST also remove the light delay in the audio? 73s and thanks, Dave (NK7Z) https://www.nk7z.net Award Manager, 30MDG Grid Awards ARRL Technical Specialist ARRL Volunteer Examiner ARRL OOC for Oregon On 3/3/19 7:01 PM, Bob Wilson, N6TV wrote: Check CONFIG:TX MON, to see if it is set to NOR or FAST (FAST should have no "distortion", because you hear unprocessed MIC audio, with no delay). This applies to both your own MIC audio and KDVR3 recordings. __ 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
Re: [Elecraft] KPA1500 Beta Utility
I have no problem with seeing output power withUtility V. 1.19.2.21 and Beta MCU 02.09 2/24/2019.Bill - W0BBI __ 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
Re: [Elecraft] DVR audio
On Mon, Mar 4, 2019, 6:22 AM Dave Cole (NK7Z) wrote: > Does FAST also remove the light delay in the audio? > Yes. However, with FAST enabled, you cannot hear what the speech compressor is doing. Everything you hear while transmitting is "unprocessed." 73, Bob, N6TV __ 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
Re: [Elecraft] Intermittent loss of power output K3
Hi Peter; It definitely had one bad FET on the LPA when it was here, I do not see in the report that it was intermittent, so I may not have looked closely for those types of failures. If you are sure it makes MW power when it is in the failure state, then it is highly likely the LPA. Inspect D1 closely, I have seen one side have poor solder, or it can heat and the solder crystallize. Re-flow solder. Pull the KPA3 but leave the KPAIO3 riser board and you can run it with just the LPA. Disregard errors about KPA3 or set it to "not inst" while you are working on it. Then set for several watts (not 5 exactly) and long press XMIT to go into TUNE, IE transmit a carrier. (TUN PWR must be at "nor"). Then take a stick and tap around on the LPA. Around D1. Also the green/red enamel on T1 & 2 can fail and the windings can short. Tap the three bias pots, sometimes they fail internally, or their solder points. Look at all parts for solder problems. You can put it in the fridge and chill it down to encourage failure, or leave it on for an hour with a blanket over it to heat it up. Keith WE6R __ 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] OT: W2 for sale
I have a factory built W2 with 2000w sensor for $275. Keith, KV5J Keith __ 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] WTB: KFL3A-2.1K 2.1 kHz, 8-pole filter
If you have an Elecraft brand KFL3A-2.1K 2.1 kHz, 8-pole filter to sell then please email me off-the-list with your price. Paypal only. Thanks for the bandwidth here. TNX & 73, Keith WA0TXJ __ 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] Elecraft K-2 Question
A question if you please. I am assembling a K-2. At present, I am currently in the Alignment and Test section, Part II. Page 65 covers the BFO test where you use Band+ and Band- to check for BFO range. When I press Band+, the frequency counter initially reads around 1.480 MHz and starts increasing in frequency. I am guessing about 100 kHz per minute. When I press Band-, I get a good reading of 4.911 MHz. All of the other checks thusfar in this Part II have been good. This is puzzling and I hope someone can give me some ideas. Thanks, Bill KC5MN __ 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] DVR audio
I think RF is getting into headset. Time to try ferrite beads. Ray W8LYJ Sent from my iPad __ 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] K-Pod for Sale
Little used K-Pod. Like new, no smoke, no pets. With manual and cables. $195 shipped continental US. Please reply directly to QRZ email address. K1ESE John __ 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
Re: [Elecraft] Elecraft K-2 Question
Bill, That is not a good situation, and I have never seen that condition. Check the orientation of varactors D37 and D38. Then check the soldering of the L33 leads to the 1/8 watt resistor - you may have to use a magnifier and good lighting. Then check the soldering of all components. To find out which components, look at the right corner of the RF Board schematic sheet 2. All the components shown below U11 are suspect. 73, Don W3FPR On 3/4/2019 7:30 PM, William Aycock wrote: A question if you please. I am assembling a K-2. At present, I am currently in the Alignment and Test section, Part II. Page 65 covers the BFO test where you use Band+ and Band- to check for BFO range. When I press Band+, the frequency counter initially reads around 1.480 MHz and starts increasing in frequency. I am guessing about 100 kHz per minute. When I press Band-, I get a good reading of 4.911 MHz. All of the other checks thusfar in this Part II have been good. This is puzzling and I hope someone can give me some ideas. __ 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
