Re: [Elecraft] Heathkit Tool.

The one I have is worn out, but --- I just ordered 10 of them from Small Bear Electronics - $1.75 each. I will have a lifetime supply when they are delivered. 73, Don W3FPR On 4/15/2017 4:37 PM, wa9fvp wrote: Years ago I built a Heathkit SB101 and other smaller projects. Normally they would

Re: [Elecraft] A little theory

On 4/16/2017 8:15 PM, elecraft-requ...@mailman.qth.net wrote: My greatest treasure however was meeting Doug De Maw I will agree with that statement, Doug was a hero of mine when I was in High School learning electronics and ham radio, I always looked forward to his articles which taught me so

Re: [Elecraft] K3 on JT-65, ALC varies widely

Brian, Try this -- set the K3 LINE in gain to somewhere near mid-range, and then adjust the soundcard "speaker" slider to give you close to the 4 ALC bars with the 5th bar flashing. Refine that level with slight adjustments to the LINE in gain. You can use TX TEST while making those

Re: [Elecraft] Heathkit Tool.

six bucks? Small Bear has them in stock and they're only $1.75 each. K0DXV On 4/16/2017 8:47 AM, Brian F. Wruble wrote: Try this: https://www.ifixit.com/Store/Tools/Small-Nut-Starter/IF145-314-1?gclid=CMvHl92bqdMCFUJDhgodTUIOwg On Sat, Apr 15, 2017 at 4:39 PM wa9fvp

Re: [Elecraft] K3 on JT-65, ALC varies widely

Oops, that should have been Line OUT gain. Brian, K0DTJ On 4/16/2017 18:19, Brian Hunt wrote: Don't see a problem with making minor adjustments of the Line In gain during the first transmission. When I adjust the level using the WSJT TUNE button I usually see the wild fluctuations

Re: [Elecraft] A little theory

Ditto on Purcells’s Electricity & Magnetism (part of the Berkeley Physics Series) that I had as an undergrad, I still have my original copy (1965) plus the latest edition updated by Morin and published in 2013. > On Apr 16, 2017, at 6:34 PM, KarlErb wrote: > > I envy you

Re: [Elecraft] K3 on JT-65, ALC varies widely

Joe, I'll comment on my setup: 1. Lock TX=RX is checked 2. tones are approximately 1500 hz Robie - AJ4F On Mon, Apr 17, 2017 at 1:34 AM, Joe Subich, W4TV wrote: > > TX ad RX EQ are forced to flat in DATA A (and AFSK A) mode. > > What frequency tones (TX Hz in

Re: [Elecraft] A little theory

I envy you that Jim. His books (and Ed Purcell's) helped me make sense of E to Yale undergrads in the 70's. I still leaf through them. "What do you care what other people think" was another of his great contributions IMHO. karl WBF > On Apr 16, 2017, at 4:54 PM, jrquark

Re: [Elecraft] K3 on JT-65, ALC varies widely

TX ad RX EQ are forced to flat in DATA A (and AFSK A) mode. What frequency tones (TX Hz in WSJT-X) are you using? Is WSJT-X in split mode? If I adjust the audio input *carefully* to 4 bars, I will see the "ALC" vary from 3 to 5 bars and the power output will vary between 98 and 102 Watts

Re: [Elecraft] K3 on JT-65, ALC varies widely

Don't see a problem with making minor adjustments of the Line In gain during the first transmission. When I adjust the level using the WSJT TUNE button I usually see the wild fluctuations mentioned. A small "tweak" to the gain will set right. 73, Brian, K0DTJ

Re: [Elecraft] A little theory

Both brilliant men but I have to say that I enjoyed Feynman's lectures more. Susskind is tougher for me to listen to. Brian KB1VBF Sent from my iPad > On Apr 16, 2017, at 3:38 PM, Phil Hystad wrote: > > Yes, off topic but then my interest in Mathematical Physics comes

Re: [Elecraft] K3 on JT-65, ALC varies widely

I also see the same behavior as Dave. I have verified my K3 is in DATA A and the TX Equalization is a flat line. However, I routinely make contacts with JT65. I use WSJT-x v 1.7.0 Robie - AJ4F On Mon, Apr 17, 2017 at 12:10 AM, Walter Underwood wrote: > TX EQ could

Re: [Elecraft] K3 on JT-65, ALC varies widely

TX EQ could cause problems like this if not in DATA A. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Apr 16, 2017, at 4:52 PM, Joe Subich, W4TV wrote: > > > Since bars 0-4 represent audio drive level and *not* true ALC when > in digital

Re: [Elecraft] K3 on JT-65, ALC varies widely

Since bars 0-4 represent audio drive level and *not* true ALC when in digital mode (DATA A, AFSK A), what you are seeing represents a significant change in *audio drive level* for the different tones. Are you sure you are using DATA A and not AFSK A with the AFSK Filter turned on? What

Re: [Elecraft] OT - operating QRP at same park

Kevin, The perpendicular antennas likely contributed to the interference. Best situation for nearby antennas is to orient them co-linear - that is end to end. 73, Don W3FPR On 4/16/2017 12:44 PM, kevino z wrote: A friend and I both had our KX2 transceivers and some resonant end fed

Re: [Elecraft] A little theory

A short story, possibly apocryphal ["alternative fact" in today's vernacular], that circulated at NASA during Apollo, had Dr. Feynman lecturing on some subject. At one point, the chalk hit the blackboard, he wrote out an equation [or something like that] and then said, "This is obvious, of

[Elecraft] W6SFM Bug Roundup Event is coming May!

Announcing W6SFM'sBUG ROUNDUP The Samuel F. Morse Amateur Radio Club, a Sacramento, California based CW enthusiast club wanted a special time to bring bug operators together on the air. In the same spirit as ARRL's Straight Key Night, participants are

Re: [Elecraft] Feynman - A little theory

Feynman was the adviser of a now-retired coworker, Ben. He told Ben to give up study of physics unless it was a true passion because that was the only way to succeed in anything. Ben said he realized this was the only advice he needed to change majors and later succeed in his new field. His

Re: [Elecraft] K3 on JT-65, ALC varies widely

Hi Dave, What you're seeing is fairly normal for your setup. The 2.7 kHz 5-pole filter is not as flat as the 2.8 kHz 7-pole filter, which I noticed on RTTY. I subsequently switched to 7-pole filters (but not in the Sub-RX). A JT65 signal is about 220 Hz wide, so when you get near the top of

[Elecraft] Elecraft SSB Nets

Here are the lists of check-ins on the Sunday 20m Elecraft SSB Net, for the last two weeks. Eric, WB9JNZ serves as the regular Net Control from IL, supported by various stations around the country. Please consider joining the Net at 18:00Z (UTC) on 14.303.5. 73 John, N6JW Elecraft SSB Net

Re: [Elecraft] A little theory

Having read Feynman's books, I got a big chuckle out of hearing him lecture for the first time. With his strong New York accent, he reminded me of the guy who makes great sandwiches at the local deli. And his sense of humor was such that he'd probably get a big laugh out of that comparison.

Re: [Elecraft] Sub Receiver I.F. Tap

Jack, If by "mistune" you mean that the impedance will be loaded down, yes that is likely. A buffer amp following will solve that . My reply was merely to indicate tapping the 1st IF at W3 is a good decision. I run both main Rx IF and sub Rx IF to LP-Pan that have the optional IF amps

Re: [Elecraft] A little theory

On Monday, April 17, 2017, kev...@coho.net wrote: > I wish I could have met the man - he was a pistol :) > > 73, > > Kevin. KD5ONS > > > Ditto, I have been very fortunate though, I have had Brian Schmidt (Nobel in Physics) as a lecturer, I have met Bob Dylan and

[Elecraft] K3 on JT-65, ALC varies widely

I just started playing with JT-65 and JT-9 this weekend, and I’ve already worked a bunch of DX, so it’s basically working ok. Transmitting on JT-65, I see a lot of variation in ALC and power as the various tones change. I’m using Data A mode with the stock 2.7 filter. I just had a QSO with

Re: [Elecraft] A little theory

I wish I could have met the man - he was a pistol :) 73, Kevin. KD5ONS On 4/16/2017 1:54 PM, jrquark wrote: Dick was my mentor many years ago, I still feel honored to have been a student of his. Jim - K7BIE On Apr 16, 2017, at 3:16 PM, Ron D'Eau Claire wrote:

Re: [Elecraft] A little theory

There is a man I wish I had met. Look up his safecracking escapades at Los Alamos! 73, Roger On 4/16/2017 2:40 PM, kev...@coho.net wrote: If you are not familiar with Richard Feynman he was a physicist who worked on the Manhattan Project. He was also a professor at Caltech. Here are some of

Re: [Elecraft] OT - operating QRP at same park

Hey D: Wow! Kinda odd about the paddles. We are going to have to check into that on the next outing. We have plenty of key options. It would be real interesting to discover the key had something to do with noise. By the next outing, we should both have a KX3 on the air! ;) Kev On Sun, Apr 16,

Re: [Elecraft] OT - operating QRP at same park

Yes. This is easily (and cheaply) killed by a stub. http://k9yc.com/Coax-Stubs.pdf Pay careful attention to the Q beginning on page 7 "Does it matter where a stub is connected? Why?" And for a detailed "how to," study http://k9yc.com/LocatingStubs.pdf 73, Jim K9YC On Sun,4/16/2017 12:18 PM,

Re: [Elecraft] OT - operating QRP at same park

On Sun,4/16/2017 1:22 PM, Detrick Merz wrote: Actually, it was a K1 that was hearing the KX3. We stopped using the 817 when we switched to CW at my station. It wasn't a pure tone I was hearing, more of a "whoosh," and pretty faint. The "whoosh" sound is phase noise, and both RX and TX have it.

Re: [Elecraft] A little theory

Dick was my mentor many years ago, I still feel honored to have been a student of his. Jim - K7BIE > On Apr 16, 2017, at 3:16 PM, Ron D'Eau Claire wrote: > > I'll attest that it is great and interesting reading for anyone interested > in Physics. I bought the three-volume set

[Elecraft] FS KXV3-2 REV A

I updated my K3 to with the KXV3B thus have a KXV3-2 REV A (2007). Includes cover panel, mounting screws, installation manual and TMP cable. $70 shipped CONUS USPS Priority Mail thank you 73 Dwight NS9I __ Elecraft mailing list

Re: [Elecraft] [K2] Odd "Hi Refl"/high current problem only in TUNE

25 amps at 14 volts is 350 watts. That is an awful lot for a radio that is supposed to be putting out only 20. I would expect at most 2 to 3 watts drain at 20 watts TX output. Something is definitely going on here. may load While I don’t suspect the antenna, have you tried testing into a good

[Elecraft] OT - operating QRP at same park

I was there with K4VD for this. Same thing happened last year at Field Day too, although the antenna arrangement was different for FD. Actually, it was a K1 that was hearing the KX3. We stopped using the 817 when we switched to CW at my station. It wasn't a pure tone I was hearing, more of a

Re: [Elecraft] OT - operating QRP at same park

I believe Jim’s “BUT —“ is something being overlooked by a lot of folks here. The fact is that the It certainly enters into the situation as a major contributor since the antenna does extend onto the feedline for end-fed antennas (all the way to the radio!). Essentially, everything that is not

Re: [Elecraft] OT - operating QRP at same park

Looking at KX3 diagram, the signal goes trough low-pass filters and band-pass filters. Both are separate for 30-20 and 17-15 bands. So soem but probably not much attenuation from 20 to 15 and vice versa. The attenuation between 17 and 40 is likely much stronger. I assume that the front end in KX2

Re: [Elecraft] A little theory

Yes, off topic but then my interest in Mathematical Physics comes before my interest in ham radio (number 1 of my three hobbies). As an undergrad physics major in the mid-1960s, Feynman volume I was one of our textbooks and I loved it. But, it was reading only as there were no problem sets to

Re: [Elecraft] OT - operating QRP at same park

May have been the same issue if the radios were on opposite frequencies. The station on 20 was, more than likely, getting hit with 40m harmonics. I have high power band pass filters (4O3A products) and I can still here my 40m signal on the exact harmonic on 20m. For example if I'm

Re: [Elecraft] A little theory

I'll attest that it is great and interesting reading for anyone interested in Physics. I bought the three-volume set in San Francisco back in the 1980's, and it remains a valued part of my scientific library alongside Pauling's text on Inorganic Chemistry. Feynman also wrote an eloquent text on

Re: [Elecraft] A little theory

Not sure how this is applicable to Elecraft list, but... If you're interested in Feynman's Caltech lectures, a little poking around the net and you can (carefully) find audio files of many of these lectures. They're really fabulous if you like this sort of thing! 73, Josh W6XU Sent from my

Re: [Elecraft] OT - operating QRP at same park

I understand we are speaking about the KX2 here but I'm curious... would roofing filters have helped in this situation? In a recent WWFF outing we had a KX3 and an FT-817 set up. We separated the antennas best we could but really didn't pay a lot of attention to it. I believe the KX3 was on 40

[Elecraft] A little theory

If you are not familiar with Richard Feynman he was a physicist who worked on the Manhattan Project. He was also a professor at Caltech. Here are some of his lectures on physics which he offered to undergrads. Introductory college level physics taught by a master.

Re: [Elecraft] OT - operating QRP at same park

At 30-40 ft separation on 15 and 20, your two antennas are probably within each other's near-field and each is thus "part" of the other. The coupling in the near-field can be very high. The general rules are: 1. Separate the antennas by as much as possible, preferably several wavelengths.

Re: [Elecraft] OT - operating QRP at same park

On Sun,4/16/2017 9:44 AM, kevino z wrote: Would the use of some bandpass filters have helped us? Maybe. It depends on whether you were hearing the other radio itself, or intermod created by some nearby non-linear device that re-radiated it. Bandpass filters will take care of the other radio,

Re: [Elecraft] OT - operating QRP at same park

Band pass filters on both radios will solve this problem. John K7JLT On Apr 16, 2017 09:45, "kevino z" wrote: > A friend and I both had our KX2 transceivers and some resonant end fed > antennas. He was on 15m and I was on 20m. Our antennas were placed about > 30-40 feet

[Elecraft] Using K3S Built in Sound Card for SSB Transmit

I am wanting to use RCForb (remotehams) while I am away from my rig. I plan on running the server on the computer connected to the K3S. I would like to do this with no additional interface other than the built in USB sound card. If I set up the server with Speakers USB Audio CODEC as the Tx

[Elecraft] OT - operating QRP at same park

A friend and I both had our KX2 transceivers and some resonant end fed antennas. He was on 15m and I was on 20m. Our antennas were placed about 30-40 feet apart, as slopers with the radiating ends up 30+ feet in the air using Jack-kite poles. The plane of the antenna's slope were perpendicular

Re: [Elecraft] Sub Receiver I.F. Tap

Edward R Cole wrote ; I brought out the 1st IF of the sub receiver from that point using 0.001 uF disc ceramic coupling cap to RG-174 coax snaked out thru a hole in the sub-Rx shield to a BNC on back panel of the K3. - I think that connecting the coax via a capacitor would

Re: [Elecraft] [K3][SOLVED] No Power out, no sigs in

Martin, Download http://www.elecraft.com/manual/E740257%20KSYN3A%20Installation%20Rev%20A6.pdf and look at page 17. It has the TMP cable connections for the new synth. 73, Don W3FPR On 4/16/2017 10:13 AM, Martin wrote: Unfortunatelly,

Re: [Elecraft] OT: Leaky coax

I designed several in-building systems with leaky coax, some over 1000'. I have even used RG6 with the shield removed every 18" with a grinder and then covered with Scotch 33. This worked very well and made my boss very happy! This was for 152 MHz paging. Making the shield slots was easy and I

[Elecraft] KX3, PX3 & HF Packer amp for sale

KX3 transceiver (with all internal options except the transverter), and the PX3 Panadapter, both factory built. Package includes the KXPD3 paddle, right angle adapter, Lexan cover for the KX3, cable set, custom built slanted wooden stand to hold both the transceiver and panadapter, MH3

Re: [Elecraft] [K2] Odd "Hi Refl"/high current problem only in TUNE

Sounds more to me like an arc out in feedline/antenna somewhere. While the arc is flashed, the feed Z goes very low. And the SWR therefore goes very high. And it takes less energy to continue the arc than to start it. The key here is that the SWR changes when the trouble starts. An antenna is

[Elecraft] [K2] Odd "Hi Refl"/high current problem only in TUNE

This one cropped up just today, with no significant change in my home station setup, using a K2/100 on 40m using a low inverted Vee. Sometimes (typically every other or every third time, but randomly), when pushing (and holding) the tune button with the power set to 11 watts or more, I get a

Re: [Elecraft] Heathkit Tool.

Try this: https://www.ifixit.com/Store/Tools/Small-Nut-Starter/IF145-314-1?gclid=CMvHl92bqdMCFUJDhgodTUIOwg On Sat, Apr 15, 2017 at 4:39 PM wa9fvp wrote: > Years ago I built a Heathkit SB101 and other smaller projects. Normally > they > would include a very a handy tool.

Re: [Elecraft] [K3][SOLVED] No Power out, no sigs in

Elecrafters, thanks a lot for the replies, especially K9ZTV, W1OH and K6NV. Did some tests like plug one leg of the ladderline directly into the so239 socket, hooked the receive-antenna to RX IN or AUX... Still No RX. Swapping the K3SYNA boards brought both rx and tx back to life. What

[Elecraft] HAPPY EASTER

Ken and I wish send Easter greetings to all ... 88/73 __ 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:

[Elecraft] Subject: Re: Heathkit Tool.

Several years ago I tried to find who manufactured them for Heath through some of the people I knew (retired) from the Heathkit company in Benton Harbor. It led to a dead-end . . . The idea was to suggest the "red nut starter" tool to the folks @ Elecraft. It never happened either.

Re: [Elecraft] New KX2 firmware with 4 programmable functions and home/field ATU settings

Thanks Wayne! Pf1-Pf4 in the rev.2.75 works just great and makes my mobile operations so much easier! I have assigned Pf1 to VOX, Pf2 to XIT, Pf3 to BKLIGHT, Pf4 to DUAL RX ( that's more for fixed rather than mobile use). I have yet to discover the sense of having two ATU Data Sets. Theoretically

[Elecraft] KX3 tuner getting stuck at 25.4:1 SWR

Hi, I was working with my KX3 earlier today, RX only, using an endfed, while running on batteries, RXing WSPR and PSK31. After running for a bit, the ATU seemed to stop working. Attempting to retune on 40m, it would stick at a 25.4:1 SWR. Tried switching down to 20m and it retuned right

Re: [Elecraft] Sub Receiver I.F. Tap

I brought out the 1st IF of the sub receiver from that point using 0.001 uF disc ceramic coupling cap to RG-174 coax snaked out thru a hole in the sub-Rx shield to a BNC on back panel of the K3. http://www.kl7uw.com/LINRAD.htm scroll down to the heading: Connecting K3 Sub-Receiver IF to