[Elecraft] Secure that AX-1 whip

This is more of an amusing story than a warning. Me and my wife were doing some radio stuff on the KX2 a while back. We were playing with the AX-1 whip antenna, not literally playing with it, actual Ham radio stuff. Anyway, just as my wife was transmitting the antenna fell over, my quick

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

On 1/27/2021 3:06 PM, David Woolley wrote: Having the roofing filter too close to the DSP filter is not necessarily a good thing, as the roofing filters are likely to have worse passband ripples and will have non-linear phase responses, which can compromise digital modes.  At least some of the

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

On 1/27/2021 2:48 PM, j...@kk9a.com wrote: I have both as well in all my radios. I can clearly hear the difference when switching between them. I mostly use the 250 Hz filter for CW and the 500 Hz filter for RTTY. Sorry, I mis-spoke. I have the 8-pole 250 Hz and 400 Hz filters, but I set the

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

True.  Statement was focused on preventing AGC action from signals outside the DSP BW and to do that, you'd like the roofing filters to include the DSP BW but not much more.  The "effective" BW of the xtal filters is also something larger than the 2.5 kHz or 0.5 kHz or 0.25 kHz in the name ...

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

On 27/01/2021 20:35, Fred Jensen wrote:   It follows that you'd probably like the selection of roofing filters to follow the DSP BW as closely as possible. Having the roofing filter too close to the DSP filter is not necessarily a good thing, as the roofing filters are likely to have worse

Re: [Elecraft] K2.Unable to undertake VCO alignment.

Doug, Are you on 40 meters? Did you measure the PLL Reference oscillator range (counter probe in TP3)? What were the frequencies? Any chance you replaced Q19 during the upgrade process? If so, where did you get it? 73, Don W3FPR On 1/27/2021 12:22 PM, Douglas Hagerman via Elecraft

Re: [Elecraft] K2.Unable to undertake VCO alignment.

What were the results of the PLL Reference Oscillator test - especially the high frequency at TP3? - the frequencies please. The 5 volts on the SCK signal is normal. Do not wear out the slug in L30! Is this a new build or the result of upgrades to an old K2? Do you have an oscilloscope with a

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

I have 8 pole 400 Hz filters in my K3s's, not 500 Hz as well as 250 Hz. According to W0YK's presentation linked below the 400 filter has a bandwidth of 435 and the 250 filter has a bandwidth of 370. This data is for 8 pole crystal filters made by Inrad, I am not sure what filters Elecraft

Re: [Elecraft] VK4

Use of boot camp is unacceptable. Native OS is the right way to do it.Jim K9TFSent from my T-Mobile 4G LTE Device __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm

Re: [Elecraft] Shack Equipment Storage

These barn thermostats are inexpensive. I have one running an oil filled electric heater so shack doesn’t drop below 50F when not in use. Keeps gear from getting so cold there’s condensation when it warms during the day. https://www.qcsupply.com/10004-peco-thermostat-tf115.html No endorsement

[Elecraft] Preventing Condensation

Hi All, Condensation on surfaces, to include the interior and exterior of equipment, is a function of ambient temperature and relative humidity. At a given RH, we know the temperature at which condensation occurs as the Dew Point. I agree with previous posts that increasing temperature (above

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

On 1/27/2021 12:14 PM, j...@kk9a.com wrote: FWIW, I have both the 400 and 250 8 pole filters. If money is an issue, I believe that there is very little bandwidth difference between the two. I have both as well in all my radios. I can clearly hear the difference when switching between them. I

Re: [Elecraft] K4 QSK

Several readers challenged me appropriately on the glowing report below because I had not done my K4 QSK testing under crowded band conditions as in a contest. Right - I hadn't encountered any but I was so happy with what I heard on quiet bands that I couldn't refrain from commenting. Today I got

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

NJ Mike:  If I understand your question, the answer is "Yes, as you narrow the DSP BW with the 'WIDTH" knob, the roofing filters will switch such that the narrowest filter that still includes the DSP BW will be selected". To your second question, the ultimate BW is set by the DSP, and on my

Re: [Elecraft] Another Elecraft K4 question

After a brief warmup, the K4's short-term reference lock deviation is approximately +/- 0.1 to 0.2 Hz at an operating frequency of 14 MHz. It scales linearly with frequency. This is roughly 5x tighter than the equivalent spec for the K3, so I'm guessing you wouldn't see it in a dopplergram.

Re: [Elecraft] Elecraft K4 question

Can you say or know about when k4 will be available from " in stock" units? 73, Will, wj9b CWops #1085 CWA Advisor levels II and III http://cwops.org/ On Wednesday, January 27, 2021, 10:57:36 AM PST, Wayne Burdick wrote: > On Jan 27, 2021, at 10:04 AM, Wayne Suite wrote: > > Does

Re: [Elecraft] Another Elecraft K4 question

Does the K4 do temp compensation like the K3 does, in very small steps? If so, is the step size the same as the K3? I used to do dopplergrams using my old 756 PRO III, but with the K3 the frequency corrections are in steps and mess up the dopplergrams... 73, and thanks, Dave (NK7Z)

Re: [Elecraft] Roofing filters and DSP bandwidth tuning

These are roofing filters, they do not effect how narrow the bandwidth can be adjusted. FWIW, I have both the 400 and 250 8 pole filters. If money is an issue, I believe that there is very little bandwidth difference between the two. John KK9A NJ Mike wrote: If I understand it

Re: [Elecraft] Elecraft K4 question

Ok, thanks. On Wed, Jan 27, 2021 at 12:54 Wayne Burdick wrote: > > > On Jan 27, 2021, at 10:04 AM, Wayne Suite wrote: > > > > Does the K4 cover the 2200m and 630m ham bands, like the flex radios do? > > The K4 receives on these bands. Transmit output can be taken from the XVTR > OUT jack, and

Re: [Elecraft] Elecraft K4 question

> On Jan 27, 2021, at 10:04 AM, Wayne Suite wrote: > > Does the K4 cover the 2200m and 630m ham bands, like the flex radios do? The K4 receives on these bands. Transmit output can be taken from the XVTR OUT jack, and is about +10 dBm. 73, Wayne N6KR

Re: [Elecraft] Shack Equipment Storage

On 2021-01-27 12:42:-0500, David Olean wrote: >I would worry about condensation. I live in New England. New England I too live in NE, and I used a dehumidifier. That got me two things: the RH lowered, and the residual heat dumped to the space. It was pretty warm, and I set the machine to 40%.

[Elecraft] Roofing filters and DSP bandwidth tuning

If I understand it correctly, as you turn the bandwidth knob counterclockwise, the filter narrows. At some point, it hits the next roofing filter and thennarrows more? Just trying to understand so I can get the right filters. Rig A (below) is what Elecraft recommends for my operating

Re: [Elecraft] MH2 mic and the K3

And a Mea Culpa from me. I have a MH2 that I use very infrequently with my K2 and it works well. When the question was asked, I noted the instructions were different for the K3 but failed to read them carefully. I should have tried my MH2 on my K3 before offering advice. I have only a casual

Re: [Elecraft] Shack Equipment Storage

David is right on all counts, from my experience.  Anybody with an unheated workshop here in Maine knows the problem of a mild spell causing water to condense on a tractor that has been sitting in a 10 degree F. barn.  One answer is never to let your equipment get too cold, hence a heater,

Re: [Elecraft] Shack Equipment Storage

I think what's getting overlooked in many of the replies is the effect of the repeated expansion/contraction cycles of daily operation on the equipment. I'm not discounting the comments about moisture, but this is how we get socketed components slowly working their way out. You might want to

Re: [Elecraft] Shack Equipment Storage

Wet is much more of a problem with electronic equipment than 100 plus degree heat. I live in Western Washington, my locality has about the same total rainfall as the middle east coast states but we rarely have downpours. It just drizzles and mists all the time. I have owned boats in this

[Elecraft] Elecraft K4 question

Does the K4 cover the 2200m and 630m ham bands, like the flex radios do? Also when are the group 3 orders shipping? Thanks, Kd5spx -- Sent from my ipad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft

Re: [Elecraft] Shack Equipment Storage

My shack is in the attic of a single storey building in the UK. I have a similar setup with a roof window for ventilation and light. It can get up to 104 degrees in Summer, even with a small evaporative air conditioner in use. It doesn't normally get too cold in Winter because the room's fed

Re: [Elecraft] Shack Equipment Storage

I would worry about condensation. I live in New England. New England is the only part of the country except for the coastline in WA, where there is a positive water budget typically. In other words, more rain falls than is evaporated or used up.  My ham shack is 1/2 mile from my house and was

Re: [Elecraft] K2.Unable to undertake VCO alignment.

I am suffering from a similar problem in the midst of applying the various upgrades. My BFO test numbers are good, 4917.13 kHz 4912.16 kHz 4.97 kHz range but when I try the VCO linearization process, I see 11090 flash and then get error 232. I have not checked the VFO against a reference

Re: [Elecraft] WTB: P3 Panadpter

I never had a P3, but used an SDR-IQ running SpectraVue software as an alternative.  Of course it requires a computer but if you're logging on one already port sharing works fine. SpectraVue "knows" the Elecraft frequency conversion and offers perfect tracking, demodulation (if you want it

Re: [Elecraft] Shack Equipment Storage

My gut feel says typical steady indoor condx would be better, but I've had some rigs in a commercial storage unit for a number of years with no heating/cooling and CO ambient temps.  I'm sure it got significantly over 100F in there during the summer and likely into the single digits F in the

[Elecraft] Shack Equipment Storage

There is a difference between stupidity and ignorance. I claim ignorance. My shack is a room in a barn attic space, separate from the house, no HVAC so cooling is one window and heating is a space heater (when I am working the waves). Otherwise storage is ambient temp in the room. Winter

[Elecraft] K3 KIO3B boards fix

Anyone on the list able to check out my 3 KIO3B boards ? Elecraft has that on backorder. The reason for asking is that I lost comm, via USB, with the radio. The computer sees no COM port and no Audio card. Please ? -- Randy Lake N1KWF 73 Gunn Rd. Keene,NH

Re: [Elecraft] David Ferrington - Mac/USB/K3s/FT8 Revisited

Thank you Richard 73 de David, M0XDF -- There is no pillow so soft as a clear conscience. -French proverb > On 27 Jan 2021, at 14:17, Richard wrote: > > David, > > YIKES! Give me a while compress the problems and disappointment down to about > ten pages! The USB cable approach has a lot

Re: [Elecraft] David Ferrington - Mac/USB/K3s/FT8 Revisited

David, YIKES! Give me a while compress the problems and disappointment down to about ten pages! The USB cable approach has a lot going for it — IF you can make it work. I’m (still) determined to get there. I’ll back to you ASAP. Richard > On Jan 27, 2021, at 9:01 AM, David Ferrington, M0XDF

Re: [Elecraft] Mac/USB/K3s/FT8 Revisited

I am sure other Mac users (me included), would like to know of your experience. I haven’t tried this yet, but will do some day. Please reply to list. 73 de David, M0XDF (K3 #174, P3 #108) -- The lame man who keeps the right road outstrips the runner who takes a wrong one. The more active and

[Elecraft] Mac/USB/K3s/FT8 Revisited

HELP! If you’re using a MAC connected to a K3s via a USB CABLE in order to run WSJT-X (FT8)… and it works right, please e-mail me AT MY HOME E-MAIL ADDRESS: flat...@comcast.net I have been struggling for a month to get it to work for me. I’ve come close, but no

Re: [Elecraft] Why more power-efficient at or below 3 W?

That'd help to explain why I was able to eke a last QSO out of a fading battery by winding the power down (as mentioned in an article in this February's RadCom). It was the only SOTA summit-to-summit I managed that day, too! Of course, next time, I'll try to remember to charge ALL my batteries

[Elecraft] K2.Unable to undertake VCO alignment.

Issue. Unable to undertake VCO alignment. Voltage at R30 fixed at 24mV. The VCO oscillator test (Alignment and test Part II p 63) has passed. Well the frequency is 7.98MHz rather than 8->10 but that conceivably could be within the bounds of measurement error. In the VCO alignment test a DMM

Re: [Elecraft] You probably do not need a K4HD for SO2R contesting

Bob is a top contester, often operates from top contesting stations, and I strongly value his comments. I'm not far from Bob, or W6NL and K6TD's remote (both mountaintop stations, line of sight). Last I heard, W6NL is running Yaesu rigs, lots of phase noise and clicks; I don't know what K6TD

[Elecraft] K4 Panadaptor Display

As the originator of this thread I would like to comment on the answers received so far. There have been suggestions that: 1. You can’t do it, except by using a quadrant monitor which can accept say 4 inputs! 2. You can achieve a similar result by using the N1MM Spectrum Display! 3. You can do

[Elecraft] You probably do not need a K4HD for SO2R contesting

Old Subject line was: "K4 Panadapter Display" This is in response to the post by NJ8M, excerpted below. I've been testing a pair of K4D (not HD) radios for SO2R (Single Op Two Radio) contesting at my QTH, which has one tower, closely-spaced monoband antennas, and 1500W output. I'm using Array