Re: [Elecraft] [K3] Roofing filters are misunderstood

ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name "roofing" did a great disservice. A better name would simply

[Elecraft] [K2] VCO Not Oscillating

We did make similar mistakes throught out our hobby.  Wrong parts, wrong components at wrong places are always the problems. Even I built the 10th K2, I still made mistakes. 73 Johnny VR2XMC 寄件人︰ Joseph Baxley via Elecraft 收件人︰ elecraft@mailman.qth.net 傳送日

Re: [Elecraft] [K3] Hum JT65/JT9 and Vox. Resolved.

I switched to a Creative Sound Blaster X-Fi Go! USB dongle and that got rid of the hum from the laptop charger. I got this originally because the desktop I use has no sound support at all. It was an extremely cheap server box that runs Linux. -- View this message in context: http://elecraft.3

Re: [Elecraft] [K2] VCO Not Oscillating

Hey, I wanted to let you guys know that the root cause has been found. I asked Don to look at the radio and the root cause was that I had misplaced a 1pF cap at C68 which was labeled 1D. C68 was supposed to be 10pF. It was a stupid construction mistake after all. Perhaps this can serve as a ni

Re: [Elecraft] [K3] Roofing filters are misunderstood

I would take issue with your answer to #1. It really depends on your situation. For most of the folks on this list your answer very well may be correct. In areas where there is very high station density, it probably is not. Here in Silicon Valley there are a LOT of very strong near-by signals. T

Re: [Elecraft] KX3 supplemental heat sink offering

For the entire Cooler KX story go to www.ve7fmn.ca -- View this message in context: http://elecraft.365791.n2.nabble.com/KX3-supplemental-heat-sink-offering-tp7586146p7588946.html Sent from the Elecraft mailing list archive at Nab

[Elecraft] Elecraft SSB net results for 5/11/2014

It was a pretty hard net this morning with terrible propagation. Signals were way down. Few could hear me well. We struggled through with 12 participants in 9 minutes. Hopefully, conditions will improve soon. Station NameQTH Rig S/N WV5I

Re: [Elecraft] [K3] Roofing filters are misunderstood

I can remember very loud stations 10 or 15 KHz away completely desensing my receiver to the point that the station I was trying to copy simply disappeared. When I switched to the K3 the difference was astounding. That is because the 756Pro is a completely brain dead design ... there is only a

Re: [Elecraft] [K3] Roofing filters are misunderstood

I too think roofing filters are really not well understood. For the record, I have the stock SSB [2.7 KHz? I don't actually know] and the 500 Hz CW. In 99% of my operating situations, it doesn't matter which one I use, I set the received BW with the DSP, and I'm a very happy ham. I do have s

Re: [Elecraft] [K3] Roofing filters are misunderstood

I completely agree with all of that except for the very last sentence. Clearly you've never used a 756Pro (first version) in a major CW contest. I can remember very loud stations 10 or 15 KHz away completely desensing my receiver to the point that the station I was trying to copy simply dis

Re: [Elecraft] [K3] Hum JT65/JT9 and Vox. Resolved.

I was wildly optimistic in this. A second source of "hum" is the switching supply of the laptop. It's similar to the power supply hum. Even though it's clearly a switching supply. Curiosly the laptop need 12 volts. So perhaps I can pick that off of the linear power supply. Or maybe run everythin

[Elecraft] For Sale: KX3 + extras and AlexLoop / Buddipole Antennas

KX3 Serial# 4981 - Purchased August 2013 (less than a year old). No scratches or dents. No functional issues. Includes - KXAT3 - Internal antenna tuner KXBC3 - Internal NiMH Charger with Real-time clock for KX3 KXFL3 - Dual-passband roofing filter KXSER-a - RS-232 Cable MH3 - Microphone KX3-PCKT

Re: [Elecraft] Keying oand sending CW on KX3 with N1MM

I choose the easiest way for me and bought an interface named SUCCI-R which you can buy via ebay.com Information: http://www.kotarov.com/projects/succi It uses only one USB-Port and you have CW-keying, PTT and more (opto-isolated). Now I can work with my KX3 with the same software (Win-Test, Win

[Elecraft] [KX3] Case Doesn't Close Quite "Right"

I've had my KX3 for a while now and I noticed the other day that where the bottom of the two halve meet up, there appears to be... Well, I'm not sure how to describe it. Near the speaker, it appears the two halves don't meet up as well as at the ends. If you look at the top half of the enclosu

[Elecraft] [K3] Roofing filters are misunderstood

What determines the bandwidth you hear at the loudspeaker? It's not your roofing filter, despite a continuing notion that it is.   Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you wan

[Elecraft] [K3] Hum JT65/JT9 and Vox. Resolved.

This is actually covered already but I need to mention it. When the WSJTX waterfall started losing signals into the noise I noticed that there was a neat periodic set of signals that lined up with the frequency ticks. Eventually it dawned on me that they were 120 Hz apart and eventually I found a

Re: [Elecraft] KX3: popping noise in radio speaker

Subject: Re: [Elecraft] KX3: popping noise in radio speaker Message-ID: <536f6e90.5000...@embarqmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Ed, Were those good quality, name brand batteries? I have heard similar popping noises from audio amplifiers caused by batteries

Re: [Elecraft] Elecraft SSB net results for 5/4/2014

The band was pretty grim this morning, here at least. How many check-ins today, Phil? Phil w7ox On 5/11/14, 8:22 AM, Phil Shepard wrote: Here is the SSB net report for May 4, 2014. We had 25 participants over 26 minutes. Station NameQTH Rig S/N

Re: [Elecraft] K3: SSB generation

Hi Larry, > The schematics show two internal crystal filters: > > one on the receive path (2 poles) K3 RF Board > It's marked BW 14 kHz. 8215.0 KHz. > This has no relay to bypass it. This is used to further suppress the 2nd-IF image response at 8245 kHz. It has essentially no ripple and thus n

Re: [Elecraft] Keying oand sending CW on KX3 with N1MM

A little more digging with my favorite search engine led me to this article. http://k4mtx.wordpress.com/2013/06/02/kx3-how-to-configure-n1mm-to-use-funct ion-keys-to-send-cw-without-additional-cables-or-hardware-like-winkeyer/ 73 de Dick, K6KR -Original Message- From: Elecraft [mailt

Re: [Elecraft] Keying oand sending CW on KX3 with N1MM

The KUSB cable used with the K3, as well as several other USB-to-Serial cables that provide a DE-9 connector, include "modem control" signals (RTS and DTR, etc) as well as TxD and RxD. N1MM uses these lines, in addition to the K3's PTT KEY menu, to use one serial port (with USB) to assert PTT an

Re: [Elecraft] Keying oand sending CW on KX3 with N1MM

You might try LP Bridge. The program allows splitting a single PC port to multiple external com ports. I use LP Bridge with RMS Express. RMS requires a separate keying port -and- and control port. Sounds like the same type of problem you have. 73, matt W6NIA On Sun, 11 May 2014 09:54:23 -0400

[Elecraft] Elecraft SSB net results for 5/4/2014

Here is the SSB net report for May 4, 2014. We had 25 participants over 26 minutes. Station NameQTH Rig S/N N6JWJohnCA K3 936 W8OVDaveTX K3 313

Re: [Elecraft] Keying oand sending CW on KX3 with N1MM

John, This may not be exactly the same, but here is how I have my K3 set up in N1MMit should get you in the right ball park. In N1MM Config, select Hardware. For Com 1, for rig, select 'None' and put check marks for Digital and for CW/Other. In Set, set DTR = CW and RTS = Always Off. For Co

[Elecraft] Test

TEST to see if I'm back on list. 73, Joe W2KJ __ 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

Re: [Elecraft] K3: SSB generation

The schematics show two internal crystal filters: one on the receive path (2 poles) K3 RF Board It's marked BW 14 kHz. 8215.0 KHz. This has no relay to bypass it. one on the transmit path (4 poles) KREF3 REF/2ND TX IF It's marked 8215.0 kHz, BW=4 kHz This has a relay to move to bypass it. These

[Elecraft] [OT] Yaesu FT-7B wanted

Please forgive the bandwidth used. My son-in-law’s cousin Eirik LA9OFA in Norway above the Arctic Circle is trying to find a transceiver like the first rig he had. He asked me to see if I could find anyone who had a working Yaesu FT-7B they would be willing to sell. Why here? I am trying ev

Re: [Elecraft] K3: SSB generation

The 15 K Hz signal from the DSP is a SSB signal. This is the second IF frequency (from the antenna side). When this is mixed with the 8.230 Mhz in you end up with the sum and difference with the 15KHz: Namely 8.215 and 8.245 MHz. The 8.215 MHz filter is used to remove the unwanted 8.245 MHz comp

[Elecraft] Keying oand sending CW on KX3 with N1MM

I tried to get the KX3 to work with the latest rev level of N1MM and configured it per the instructions for one cable connection using just the USB to serial cable supplied to go between the radio and PC win7. The configuration talks ok at 38400bps with commands for changing bands, vfo frequency

Re: [Elecraft] K3: SSB generation

Thanks for writing, Lyle. I am curious, then, why the (K3) SSB signal is routed through a crystal filter. Is it purely a "belt and suspenders" approach to enforcing a limit on the bandwidth of the transmitted signal? Brian K1LI -- View this message in context: http://elecraft.365791.n2.nabble

[Elecraft] K3 Low end roll off in Data mode

I have noticed significant low end roll off in the Data mode below .5 kHz. (Both transmit and receive). This is not present in the SSB mode. It is not related to the settings on my roofing filters because it is there with both the 6 kHz filter and the 2.7 kHz filter, and even with shift and width s

Re: [Elecraft] KX3 won't stop scanning-- help!

Supposedly the DATA-A mode should automatically disable some of those settings, but in early versions of the firmware, this didn't seem to work properly. I haven't revisited this behaviour with the more recent firmware, so it may well be that those settings are now being properly disabled in the

Re: [Elecraft] KX3: popping noise in radio speaker

Ed, Were those good quality, name brand batteries? I have heard similar popping noises from audio amplifiers caused by batteries with high series resistance. I have not observed that problem with the KX3, so I am just suggesting that the problem may have been the batteries. 73, Don W3FPR

Re: [Elecraft] KX3 won't stop scanning-- help!

I read through the two macros on the page. In the PKT macro, you turn off the speech processor, audio effects, and turn *on* DATA A. Wouldn't turning DATA A *on* negate the need to turn of the speech processor and audio effects? There may be other settings that are turned "off" by going into D

Re: [Elecraft] KX3 won't stop scanning-- help!

Matt, Many thanks! You have provided a great reason (and a "rosetta stone") for me to start exploring the command structure. Looks like fun. Jack - KD4IZ On 5/11/2014 02:39, Matt VK2RQ wrote: I had some enquiries about the macros I am using to switch between packet and SSB mode, so I did a

Re: [Elecraft] KX3 won't stop scanning-- help!

Matt, Thanks for sharing that, I found a few interesting things to add to mine as a result. -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.