[Elecraft] Low Frequency Modulation of Side Tone.
I just noticed that on 80 and 17m the side tone in my K2 has a low frequency modulation superimposed over the normal frequency. When I discovered this I was trying to call a Panama station on 80m. I cranked the power up to 100w and started my call. The rig sounded like it was going nuts. It even locked into a repeating string of dits or das. I do not remember which. I turned the rig off to get it to stop. I suspect the repeating transmission is unrelated to the side tone problem because I found that my computer keying cable was part way out of the jack. It must have been bad timing that it came out just as I was calling. The amplitude of the modulation on the side tone increases with power output, and is only noticeable at ~60 to 100 w. On 80m if I key down for several seconds the modulation decreases. It sounds like a capacitor charging. On 17m, the sound is much louder and does not decrease with time. The output signal sounds fine in another receiver. I tested using a dummy load. I also turned off my power supply and computer monitor, and used a battery to power the K2. Neither helped. I built the KPA100 this last spring, and have not noticed this before. However, I have been running mostly QRP so I do not know when this problem showed up. KPA100 is located in an EC2 with the KAT2. The connecting cable is 32 inches long. What should I look for to fix this? Jeff Burns AD9T ___ 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
RE: [Fwd: Re: [Elecraft] Big K2 (or K2B - B for Big)]
The current generation of control software and logging software do not work together well. I use N3FJP for logging. Using a control program would make it impossible to gather data into N3FJP's program. A hardware remote would not have this problem. Jeff AD9T -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of W3FPR - Don Wilhelm Sent: Monday, December 27, 2004 0:11 AM To: elecraft@mailman.qth.net; Leigh L Klotz, Jr. Subject: Re: [Fwd: Re: [Elecraft] Big K2 (or K2B - B for Big)] All, If a larger remote front panel is the proper answer, then why not simply use one of the K2 enabled software control programs which can add function as well as size and flexibility? The N4PY software and Ham Radio Deluxe are two examples. The 'panel' can be as large as your computer screen. Apologies to those who really want to press 'real' buttons (and that includes me - I am quite hardware oriented. but I don't think that a 'BIG' K2 panel is feasible anytime soon). 73, Don W3FPR - Original Message - I wonder how much of the desire for a bigger K2 could be satisfied with a remote front panel? I have often thought of building a remote head for the KIO2 using the $40 Olimex PIC front panel board (now from sparkfun.com) for use with a backpack. The same idea could be used for a bigger front panel, which could also provide two VFO knobs (though not stereo dual reception). I think only the AF gain and IF gain are impaired, and the AF gain is easily worked around by using an audion amplifier in the remote head. ___ 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 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] Microphone Resistor
My new MD2 microphone should arrive tomorrow, and I am trying to decide what to do about the resistor between pin 6 and pin 1. I have a hand microphone with a Heil HC-4 and a N0MF pre-amp in it that I want to continue to use. It has a 1k resistor between pin 1 and pin 6 in per the instructions for the pre-amp. It seams I have three options. 1. Remove the 1k resistor from the hand microphone, and install the 5.6k resistor in the K2. Will this provide enough current to run the pre-amp in the hand microphone? 2. Add the 5.6k resistor to the K2 and leave the resistor in the hand microphone. Will the hand microphone then draw too much current? 3. Put the 5.6k resistor in the MD2. I know this will work, but requires fitting the resistor into the connector. What is the best option? Jeff Burns AD9T ___ 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] MD2 vs. TT 705 Microphone
I currently have a Ten Tec 705 Microphone that I use with my K2, but am considering ordering the MD2 before the sale pricing is over. How does the sound quality of these two microphones compare? How are the ergonomics of the MD2? I currently use the PTT button in the base of the 705. Is the PTT button on the body of the MD2 convenient when the microphone is in a desk stand? I like the coiled cord on the 705. Does the straight cord on the MD2 get in the way? Thanks, Jeff Burns AD9T ___ 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] In ear monitors
I have been using the Koss Plug earphones with my K2. When the earplugs are new they are not very comfortable. When the earplugs wear out they get reasonably comfortable, but do not block out sound as well. I am thinking of getting a pair of custom fitted in-ear monitors. The only ones I have found that are reasonably priced are the Challenger phones available here: http://store.yahoo.com/earplugstore/chmisearph.html or http://69.36.163.112/racing.mainpage.html Has anyone ever used these? What do you think? For the price of these earphones I could get the ProSet - K2. Any comments about the comfort, quality, and sound isolation of this headset would be appreciated. Jeff Burns AD9T ___ 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: Ten-Tec 705 Microphone
I have one Ten-Tec 705 Microphone for sale. It is in good used condition. It currently has an eight pin connector wired for an Elecraft K2. I will supply the original four pin connector for use with Ten-Tec rigs. I am willing to install the four pin connector if the buyer prefers, but I currently do not have a Ten-Tec rig available to test the installation. I can send pictures by e-mail. Price is $80, and I will cover basic shipping to any of the continuous 48 states. Jeff Burns AD9T ___ 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] Cost Effective Balun
I have read a lot about baluns, and still cannot decide what to get. I have a KAT100 and, want to experiment with several antennas fed with open wire line. From all the discussions of baluns I have a formed a few impressions. 1. For QRP operation the balun is probably not needed. 2. Use a 1:1 balun unless you know your antenna system has high impedance on all bands of operation. 3. For multi-band operation make the balun really big to handle any waste heat. With these ideas in mind I am tempted to get a super heavy duty balun like the ones form DX Engineering. The $100 plus price tag on these big baluns is encouraging me to take a look at cheaper alternatives. One alternative is to make a heavy duty balun form a kit. Any comments on the various kits available? Two sources I have located are: http://www.amidoncorp.com/aai_cost_experimenter.htm and http://thewireman.com/index.shtml Another alternative is Elecraft's BL1. Is this little balun really up to 100W service for multi-band antennas? Has anyone found a good enclosure for the BL1? Can a switch be used to switch from 1:1 to 1:4 configurations? Thanks for taking one more look at this old topic. Jeff Burns AD9T ___ 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] Comparing HexKey CW Paddle
Has anyone been able to compare the new HexKey to keys made by Begali or Schurr? I have a Schurr Portable Wabbler and have had my eyes on the Graciella Vertical Key. Just wondering how thy compare. Jeff Burns AD9T ___ 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
