[Elecraft] KPA100 Middle Side Screw Alteration
I wonder if anyone has considered drilling out a hole in the middle side screw location on the KPA-100 big enough to force in an externally splined insert that has a 4-40 internal thread. The external spline would make the insert grab the heat sink firmly so it would not turn with the screw. Does anyone know where such an insert could be found, and has anyone done this? Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] No Audio in K2
My K2/100 occasionally loses audio when it has been on a while with the AF GAIN turned down (K2 on butnotbeingused). My K2 is an early model in the 2200 series serial number, and the AF mod was done. It also has the KDSP2 and the 10th digit CW LED zero tuning mod. Whenever I lose the audio, I cannot get it back by turning the AF GAIN up. The RF GAIN works correctly and will display all 10 digits if turned CCW while the audio is lost. Signals show up normally on the S meter as I tune across the band. I noticed that I cannot activate the DSP when the audio is gone. All other functions are normal. The only way I can get the audio back is to cut the K2 off and then back on. The audio returns to normal status and may remain that way until I turn the K2 backoff. I have the K2 grounded, but I notice the display may momentarily change to either power setting or keyer speed as my hand approaches the K2. Is this an electrostatic condition I am going to have to live with? Has anyone else experienced this? If so, what can be done to correct this? Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2/100 with Alpha 99
Is it possible to key the K2/100 for CW QSK operation with the Alpha 99. If so, how should the delay be set in the K2. I would rather key the K2 first rather than keying the Alpha 99 and running the keying line back to the K2. Roy Morris W4WFB However if you get a QSK amp, like some of the Alpha's or TenTec's, you can retain the degree of QSK that the K2 or K2/100 is able to provide. ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Elecraft Digest, Vol 9, Issue 5
Yes, I have experienced the temp reset. I don't believe it is that unusual. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] LED Display on KAT100
G3RXQ, Stewart, apparently has the same problem with his KAT100 that I have. I have just learned that the erratic display on 30 meters is to be ignored. The tuner works fine and gets the SWR down to 1:1 on all bands. And yes, my tuner is well grounded. I have just learned to live with the erratic LED indication. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KAT100 LED Configuratuin Jumpers
There are jumpers W1 through W6 that ground various pins of MCU U1 16F877 for LED control. W1 - W2: Both open = Auto. LED control; W1 = DOT; W2 = BAR and W3 - W6 Leave open except as required (see manual). This information is written on the KAT100 RF Board schematic Rev. A, dated 10-30-02, sheet 2 of 2. I have not found anywhere in the manual that says anything about these jumpers, especially W3 - W6. Does anyone know about these jumpers? Also, there has to be a way to bypass stray RF to keep the SWR LEDs from going ape. Surely something can be done such as putting .01pF caps across each LED (D103 - D112) or putting a cap between the 120 ohm resistor to ground on each. Maybe there is a simpler mod. What small amount of stray RF I have in the shack is not hot and is easily handled by all my rigs and other auto antenna tuners. The KAT100-1 works perfectly if I can just get the display to work right (especially on 30 meters). I would like to focus on what can be done to the tuner and not the antenna or ground. Surely someone can come up with a fix for this. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] SSB Low Output
I have found the best way to get additional gain from the KSB2 is to add the KSB2 INCREASED GAIN MOD by KI6WX as well as the other KI6WX KSB2 mods. These mods can be found on the Elecraft site. Be sure the mike input is biased correctly first. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KAT100 LEDs Gone Wild
I thought that installing MCU1.05 there would be ample RF sampling rates taken to avoid erratic LED displays. The updated firmware seems not to be the solution. With a 50 ohm dummy load on the KAT100 output only the leftmost LED lights up and K2 SWR is 1:1 regardless of power or band in use. With the Carolina Windom 80 attached to the KAT100 output and a Bird 43 wattmeter between the K2 output and KAT100 input, I found the reflected power stayed at zero and the forward power stayed at max (regardless of band or power setting) while the KAT100 LEDs and K2 SWR reading were going wild. The wildest LED and SWR activity occurs on 30 meters but does not occur on all bands. I have already removed the white wire from pin 7 of the K2 end of the IO port and put a .01 pF cap from the white wire to the bare wire on pin 1. My shack is on the second floor (over my garage) and I have tried to be as attentive to grounding as possible. I use a common grounding point that attaches to a 1/2 copper pipe (used only for grounding) that goes down approx 10 feet to an eight foot buried grounding rod. I believe the K2 erratic SWR activity will stop when the KAT100 LED stray RF problem has been eliminated. Has anyone made any changes or done any bypassing inside the KAT100 to eliminate stray RF and tame the LED display? Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] DSP on 60 Meters
When I tap DISPLAY and get S1 nr nt I hear a raspy tone ticking off the seconds. It is present in any DSP or time mode. It is loud enough to be annoying. This phenomenon only occurs on 60 meters. Has anyone else experienced this? Is it normal? Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K6XX Visible CW Tuning Indicator
Tom Hammond, N0SS, has done a really nice job with this kit. The SMT parts are encapsulated in a sealed plastic strip. The parts are removed from the strip in the order they are used. The board is well laid out and is of good quality. Tom says he only has about 15 kits ($17pp) remaining that are not spoken for and will supply the PC board only (and a list of Mouser and Digikey part #'s) in the future. I was hesitant in ordering an SMT project, but quickly discovered that SMT soldering is not so daunting! The same temperature controlled soldering station (such as WTCPT) used to construct the K2 can be used with a conical tip to construct this project. With real care I was able to use .032 dia. 60/40 solder. (Smaller diameter is recommended) I discovered some really nice features of this tuning indicator... the 10th LED still functions as an S meter digit in receive, and it also functions in RF and ALC positions in transmit. I found the offset can be visually found within 10 Hz very quickly. Thanks to Tom for producing this nice kit. I have no monitary interest in Weller or this project. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Recommended Switching Supply
This may be a bias on my part, but I remember the first switching supplies that came out. They were full of hash which gave them a bad name. Switchers are no doubt better now, but they still are capable of putting out hash (depending on your shack and antenna environment). I personally like the Astron linear supplies. I have four, and they have all worked well over many years. If the supply is used only on the bench, a linear supply is the way to go. Just keep it a couple of feet away from the K2. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS: K2/100 and TS850SAT
This is the second K2/100 I have built, and I am selling this one so I can build another. It is a very late serial number (42XX) with the following options installed: KSB2 SSB Option K160RX 160 Meter Option K60XV 60 Meter and XVTR Interface Option KNB2Noise Blanker KPA100 100 W. Amp KDSP2 DSP Filter/Clock Finger Dimple Spinner K2/100 shipped with all manuals, power cable, KPA100 to computer cable, and frequency counter probe. Like new, no scratches, precision alignment and works great on all bands. I am asking kit cost $1433 plus shipping. I am also selling a Kenwood TS850SAT with the YK-88C-1 and YG-455C-1 CW filters installed. This radio will tune and transmit on the 60 meter band. The five 60 meter channels are programmed in quick memory. I am the original owner. It looks and works like new. It comes with the operating manual, MC43 hand mike and power cable in the original box. $725 plus shipping. I also have a KAF2 for sale $35 plus shipping If interested, please contact me direct. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Antenna Suspension
I am using a Carolina Windom 80 suspended with 3/16 nylon rope through stainless steel eyehooks up 50' between two large oak trees. These trees are approx 123 feet apart. Because I am located in hurricane alley and subject to high winds, I would like to remove the permanent tiedown on one of the trees and tie a weight to the rope. I would like to know how much weight should be used. What kind of weight (how many bricks or what-have-you). Thanks. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 ALC Anomaly Using PTT
I have installed the two resistors in the mod that Gary told me about, and the K2/100 ALC now works as it should. I am now going to do Gary's mod to my other K2/100 since it also has the KI6WX mods installed on the KSB2 board. Thanks again, Gary. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 ALC Anomaly Using PTT
Anyone who uses a K2/100 with a linear needs to know that the K2 ALC does not kick in if PTT is used and the K2 display is in the RF mode. This can cause the input to the linear to be overdriven. This condition can also cause the K2 output not to be linear. It is necessary to put the K2 in ALC mode to activate the ALC in PTT. Once the ALC has been activated, it can be changed back to the RF mode. If the K2 display is in the RF mode when using PTT, it is necessary to access the ALC mode each time the sideband or band is changed. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS: KAF2
FOR SALE: KAF2 with mounting hardware. This comes with three and five pin female headers and stand-off screw. Manual included. Capacitance in the Real Time Clock oscillator has been carefully selected for high time accuracy. $55 postpaid Cont US. If interested, please contact me direct. Roy Morris W4WFB ___ 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.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Firmware Upgrade
Within the last three or four months I upgraded all firmware chips for my 3 year old K2/100/KAT100-1 (so I could do the CW bandwidth mod and install the 60 meter board). I received version 1.08b for my KSB2. Since then I have purchased a new KSB2 that has version 1.09. What does the 1.09 supposed to do that the 1.08b does not do? Thanks Roy Morris W4WFB ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
