[Elecraft] KX3 for Sale

I Santa didn't bring you any toys this holiday season, I have a KX3 for sale: KX3 KX3 Transceiver KXAT3 Auto Tuner KXBC3 Internal Charger with Clock (Never Installed) KXFL3 Roofing Filter MH3 Microphone KXUSB USB Interface Cable KX3-2M-AT 2M Module with Auto Tuner KX3-PCKT Cable Set

[Elecraft] K3 comments on Koss SB45 headsets

Seasons greetings one and all. Has anyone used/using the Koss SB45 headsets on their K3? I have the CM-500 and I am on my second set but again the padding is starting to deteriorate so before they look too ratty, figured I would get a backup and as the CM500 are not available in VK but the Koss

Re: [Elecraft] headphone impedance

I have a pair too. They are indeed loud and are 8 ohm impedance . I like them for cw however they get uncomfortable after a while. I prefer "around the ear" types vs. "on the ear". Steve N4LQ On Mon, Dec 28, 2015 at 4:19 PM, Vic Rosenthal 4X6GP/K2VCO < k2vco@gmail.com> wrote: > I recently

Re: [Elecraft] K3S, fldigi and Windows 10

Bob, Set the K3S to DATA mode with DATA A as the data sub-mode. That sets compression and equalization to zero, otherwise it is the same as USB. I am not sure why you have MIC + LINE selected, just set the input (while in DATA mode) to LINE IN. I assume you are attempting to use the soundcard

Re: [Elecraft] headphone impedance

I recently started using an old set of Kenwood HS-5 phones (8 ohm) after my cat chewed through the cord on my nice hi-fi phones. I noticed that the audio was much louder, I presume a result of the lower impedance. I'm even thinking about adding some resistance in series, because the audio gain

Re: [Elecraft] headphone impedance

I love my HS-5's. On 12/28/2015 3:19 PM, Vic Rosenthal 4X6GP/K2VCO wrote: I recently started using an old set of Kenwood HS-5 phones (8 ohm) after my cat chewed through the cord on my nice hi-fi phones. I noticed that the audio was much louder, I presume a result of the lower impedance. I'm

[Elecraft] [K1] Internal Noise Bursts every 12 seconds or so

I just completed assembly of a 30m/20m K1 up through the point of Receiver calibration. Everythings has gone smoothly and all tests and alignment steps were completed successfully. I can hear a 1 uV signal very clearly on both bands. However, there appears to be some internal periodic noise.

Re: [Elecraft] P3 TX Mon Power Measurement Anomaly

"> Does anyone have a good explanation for this?" I don't know if this is a "good" explanation, but it is one that is sometimes [often?] true: Many TX Power sensors actually measure voltage, it's a whole lot easier than power. The meter or display is marked in watts which are computed by

[Elecraft] K2 - Q7 and Q8 failure

While operating my K2 (SN 7581) on CW I heard a loud pop! I traced it to blown Q7 and Q8. They are physically blown apart. The K2 was operating normally before this happened. Everything else seems to be OK except for no power output. The driver seems to be working; I can key the radio and hear it

Re: [Elecraft] [K1] Internal Noise Bursts every 12 seconds or so

Bob, That is not a normal situation for the K1. The "standard" answer is that it is the result of a poor solder connection. I cannot guess at where it could be other than to say due to the periodic nature of the occurrence that it is associated with the MCU in some manner. So check the

Re: [Elecraft] P3 TX Mon Power Measurement Anomaly

Hi Mark, Thank you for a cogent explanation. Clearly, I never thought about the math nor realized how much those little losses add up. 73, Ken, K6LA / VY2TT __ Elecraft mailing list Home:

Re: [Elecraft] K2 - Q7 and Q8 failure

Depending on the antenna in use, I have had this happen.. to the exact detail.. what happened to my K2, was simple.. wind built static on the antenna, there was no path to ground, but through the K2 finals.. so when the potential reached high enough to break down the resistance in the path.. it

Re: [Elecraft] [K1] Internal Noise Bursts every 12 seconds or so

Many thanks for the rapid reply, Don! Good to know this isn't normal, and I will certainly follow your advice and check the front panel assembly carefully, especially the solder. When I initially checked things with an optical loop, the solder appeared to be bright on both sides of the PCB (at

[Elecraft] K3 comments on Koss SB45 headsets

I've been using the Koss SB45 headset with my K3 for several years now. Audio is fine, both Rx and Tx. I wish the headband was a quarter of an inch wider, though. With my (apparently) fat head, the ear cups "run out of pivot" and the bottom edges do not seal properly against my head. This is

Re: [Elecraft] P3 TX Mon Power Measurement Anomaly

I certainly understand the concern though. Personally, I have replaced UHF connectors with N connectors where I can, use nothing worse than RG214 or LMR400 for interconnects at my station, and have the interconnects as short as possible. I built many cables with exactly the connectors and lengths

[Elecraft] KX3 - KXPD3 Paddles For Sale

No longer need this as I mainly use a bug or external paddle with my KX3. It's still available if anyone needs one. I'm offering this one for $80 shipped priority mail anywhere in the U. S. (Price drop from last email) -- I'd prefer not to ship internationally due to much higher postage

[Elecraft] headphone impedance

Is there an acceptable range of headphone impedance for the K3/K3s? I've got some 300-ohm headphones and wondering if the impedance alone makes them a poor choice for my K3s? Thanks & 73, Barry N1EU __ Elecraft mailing list Home:

Re: [Elecraft] headphone impedance

Barry, Normally for audio, the impedance is not a problem. It is the voltage that matters. The output of the headphone amplifier is a low impedance source which will drive loads of varying impedance. Compare with plugging an appliance into a household AC receptacle - The power company

Re: [Elecraft] headphone impedance

The headphones I have used for over a decade are 600-ohm high-end stereo high-fidelity phones. I obtain “comfortable” audio with my audio gain control set at about 9 o’clock. I am 99% CW, and they are my preferred-by-far headphones for both the K3 and the K3S, although I use something else

[Elecraft] My personal KX3 wish list

Hello everybody, having bought my KX3/PX3/KXPA100 combo just one year ago, I'd like to come up with some ideas. After operating my K2/KPA100/KAT100 for years (and it's still great!) and also operating K3s frequently for contest operation the KX3 quickly became my favourite TRX, at home, on

Re: [Elecraft] KX3 - KXPD3 Paddles For Sale

The KXPD3 has been sold -- thanks for the replies. Jim - W0EB -- Original Message -- From: "Jim Sheldon" To: "Elecraft Mailing List" Sent: 12/28/2015 7:56:15 AM Subject: [Elecraft] KX3 - KXPD3 Paddles For Sale No longer need this as I mainly

Re: [Elecraft] headphone impedance

Thanks for all the public and private responses! My 300-ohm headphones should not be a problem for the K3s. 73, Barry N1EU On Mon, Dec 28, 2015 at 10:20 AM, W2RU - Bud Hippisley wrote: > The headphones I have used for over a decade are 600-ohm high-end stereo >

Re: [Elecraft] headphone impedance

On Mon,12/28/2015 10:08 AM, Barry N1EU wrote: I believe this also means that the K3 headphone output circuit will deliver 10X power (with fixed V, P~1/R) into a 30-ohm headphone as a 300-ohm headphone, so at some point the amp might clip as you raise the headphone impedance? Only if you crank

Re: [Elecraft] My personal KX3/PX3 wish list

Hello DL1EKC and all My wish list is: - SYNC-AM K3’s SYNC-AM function is portable? - PSK63 and SSTV mode - LINE out Menu to switch the phone output to line fixed level output. Best hopes and wishes for the New Year! -- JE0LFI / nakamura > - pushbutton switches > > - recalling

Re: [Elecraft] My personal KX3/PX3 wish list

The KX3 uses a different DSP processor than the K3. The code is not portable. But I agree, synchronous AM would be nice. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Dec 28, 2015, at 8:27 AM, Nakamura wrote: > > Hello DL1EKC and

Re: [Elecraft] headphone impedance

On Mon,12/28/2015 5:10 AM, Barry N1EU wrote: I've got some 300-ohm headphones and wondering if the impedance alone makes them a poor choice for my K3s? As others have told you, it's not an issue. For at least 50 years, audio equipment has low impedance outputs that are designed to work into

Re: [Elecraft] headphone impedance

I believe this also means that the K3 headphone output circuit will deliver 10X power (with fixed V, P~1/R) into a 30-ohm headphone as a 300-ohm headphone, so at some point the amp might clip as you raise the headphone impedance? Barry N1EU On Mon, Dec 28, 2015 at 12:57 PM, Jim Brown

[Elecraft] New KX3 field-test firmware: PSK63 mode; 15 W output (all modes) on 80-20 m

Hi all, We've been testing an experimental (field-test) KX3 firmware release that has the following features: - Both PSK31 and PSK63 modes - Up to 15 W power output (all modes) on 80-20 meters - Increased power output on 4 meters (with KX3-4M module; some units were not making target of

[Elecraft] K3 Program SET of LINE-IN GAIN

Is there away to SET LINE-IN gain via external program command? I will be operating remote and do not see a command to do this. Thanks. - Ron N9RC K2 #3601, K3 #1162 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Program-SET-of-LINE-IN-GAIN-tp7611903.html Sent

Re: [Elecraft] K3S, fldigi and Windows 10

Of course there is documentation for the K3S. I meant to say for the K3S and Fldigi. 73, Don W3FPR On 12/28/2015 3:49 PM, Don Wilhelm wrote: I don't know of any documentation specific to the K3S. __ Elecraft mailing list Home:

[Elecraft] K3S + SteppIR Controller+ MacLoggerDX

If you’re running a K3 or K3S with a SteppIR controller and MacLogger DX, I’ve got a question for you: RS232 frequency data from my P3 is split with a Y-cable between the SteppIR controller and the Elecraft KUSB cable that runs to my Mac Mini. However, to allow MacLoggerDX to initialize with

Re: [Elecraft] K3 comments on Koss SB45 headsets

I inquired about this a few months ago. The CM-500 has an electret mic that everyone likes. The Koss SB-45 has a dynamic mic that some like and some don’t. Otherwise, they seem similar. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Dec 28, 2015, at 2:26

[Elecraft] KX3 for sale

If Santa didn't bring you any good toys this holiday season, I have a KX3 for sale: KX3 Transceiver KXAT3 Auto Tuner KXBC3 Internal Charger with Clock ( never installed) KXFL3 Roofing Filter MH3 Microphone KXUSB USB Interface KX3-2M AT 2 meter module with Auto Tuner KX3-PCKT Cable set Asking

Re: [Elecraft] K3 comments on Koss SB45 headsets

Guys, Guys, Guys, I HAVE the CM500 from Yamaha currently, however, I need to get a backup/standby/replacement headset as my CM500 is starting to fall apart (heavy usage) and they are not sold in VK. It's a Yamaha thing. Shipping from the US to VK is $101 USD, that's a bit rich for my blood :-)

Re: [Elecraft] K3 comments on Koss SB45 headsets

Correction, the Koss SB-40 looks like a CM-500 but has a dynamic mic. I should always re-check my facts before posting. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Dec 28, 2015, at 2:39 PM, Walter Underwood wrote: > > I inquired

Re: [Elecraft] headphone impedance

No problem...Just grossly out of specs. Whatever happenshappens 73 Steve N4LQ On Mon, Dec 28, 2015 at 2:53 PM, W2RU - Bud Hippisley wrote: > What am I missing? > > I use 600-ohm stereo headphones plugged directly into the front panel jack > of my K3S. > > I run the

[Elecraft] K3S, fldigi and Windows 10

I've managed to hookup my K3S to my Windows 10 box and receive PSK31 using fldigi, but I'm not having success transmitting. I put the K3S in VOX mode, USB, 14.070. I set the Mic+LIN to ON. When I click the Tune button on fldigi, the K3S transmits, but with very low output. I can't find any

Re: [Elecraft] K3S, fldigi and Windows 10

> I put the K3S in VOX mode, USB, 14.070. I set the Mic+LIN to ON. *DON'T* use USB for data modes and *DON'T* use Mic+LIN = ON. Instead, use DATA A for fldigi and set CONFIG:MIC SEL = LINE IN for data modes. That will allow the MIC Gain to control LINE IN *and* keep the mic from being "hot"

Re: [Elecraft] K3S, fldigi and Windows 10

That sounds suspiciously like an entirely Windows 10 issue. Click on settings. In the "find a setting" box type "volume" without the quotes. The window will switch to a new label "Search Results". click on "Adjust system volume" You should get a new panel labeled "Volume Mixer". Your sound

Re: [Elecraft] headphone impedance

What am I missing? I use 600-ohm stereo headphones plugged directly into the front panel jack of my K3S. I run the Audio Gain control at 9 o’clock — roughly a 25% rotation toward full volume. I have more than enough audio for my elderly ears, and when I pull the headphone plug out of the

Re: [Elecraft] headphone impedance

K3 uses the. LM4811 Headphone Amplifier Texas Instruments Specs for output Z RL = 16Ω 105 mW RL = 32Ω 70 mW At 60 ohms the output power drops to 20 mw. Per their graphs. 300 ohms is not even considered. Amplifier gain control is done digitally within the chip. With such a high Z load, gain

Re: [Elecraft] headphone impedance

Steve, Look closely - that is the *power* that can be developed by the amplifier. Certainly a higher impedance load will reduce the power available from the amplifier, but the output voltage will be higher and the current requirement is lower. Most headphones (other than some audiophile

Re: [Elecraft] headphone impedance

Perhaps this will help: Look up the specs on a good home audio amplifier — say, QSC or Crown. You’ll find something called “damping factor”, and it’s often 50 or more. Roughly speaking, it’s the ratio of the (loudspeaker) load impedance to the internal (source) impedance of the audio

Re: [Elecraft] headphone impedance

Certainly a higher impedance load will reduce the power available from the amplifier, but the output voltage will be higher and the current requirement is lower. Higher impedance headphones (and speakers) have larger voice coils (more turns) than lower impedance headphones/speakers. The

Re: [Elecraft] P3 TX Mon Power Measurement Anomaly

On Mon,12/28/2015 6:40 PM, Mark Goldberg wrote: I have replaced UHF connectors with N connectors where I can, use nothing worse than RG214 or LMR400 for interconnects at my station, and have the interconnects as short as possible. I built many cables with exactly the connectors and lengths

Re: [Elecraft] K2 - Q7 and Q8 failure

Ken, That is normally the result of unmatched transistors for Q7 and Q8, but Elecraft has been supplying matched transistors for the last 3 years. I suspect that you have some incorrect components in the Q7/Q8 base circuit. After checking everything in the Q7/Q8 base circuit, check the PA

Re: [Elecraft] [K1] Internal Noise Bursts every 12 seconds or so

Bob wrote: > Even though the second CPU on the filter board is mostly inactive, no > telling what internal loops are going on that might result in it turning > that 4 MHz resonator into a periodic signal. In addition to the relays on the filter board itself, the PIC on the KFL1 board controls

Re: [Elecraft] K3S, fldigi and Windows 10

Even simpler - right-click on the little speaker icon in the lower right (the task bar). You will then get a menu (It's called a Context Menu) that contains, among other things, "Input Devices" and "Output Devices". Click on "Output Devices". You will find displayed a dialog box with all of

[Elecraft] K3 - N1MM & keyboard

When I contest I use N1MM, use the memories on the K3 and send with the key when needed & I'm busy as a one arm paper hanger doing it this way. I'd like to just use the keyboard, use N1MM to the fullest and use the paddles only when needed. What's an affordable & simple method of getting the

Re: [Elecraft] K3S + SteppIR Controller+ MacLoggerDX

In other words, the Steppir controller should be connected to receive data but not transmit. Only two wires should be connected to it -- receive data and signal ground. I always forget the pin numbers, but you can google it. If it is connected like this, the computer will not know the Steppir

Re: [Elecraft] K3S + SteppIR Controller+ MacLoggerDX

David, I do not use a MAC nor do I have the K3S, but from what I understand, you should have the "RS-232 Y" cable to activate the SteppIR controller between the cable between the K3S and the P3 XCVR connector. That should allow the SteppIR controller to hear the band data information. 73,

Re: [Elecraft] K3 comments on Koss SB45 headsets

It's quite a coincidence that you asked about the Koss SB-45, because I just got one for Christmas! Mine is the one with 3.5mm connectors, not the USB version. I also have a CM-500. I was going to post a review here after wearing the SB-45 all next weekend in the RTTY Roundup, but here are

[Elecraft] Sennheiser HD280 Headphones

On Mon,12/28/2015 4:13 PM, Barry N1EU wrote: Sorry, I would qualify the recommendation for the Sennheiser HD280 based on many years experience with those headphones. One big plus for the HD280s is that you can buy replacement cables for them. I've not seen or worn them, so have no opinion on

Re: [Elecraft] K3S + SteppIR Controller+ MacLoggerDX

Please use the P3 PC connector, not the XCVR connector. The XCVR connector has a lot of special data that flows between the K3(S) and the P3; the PC connector has this extraneous and undocumented stuff filtered out. 73, Lyle KK7P ...you should have the "RS-232 Y" cable to activate the

Re: [Elecraft] K3 comments on Koss SB45 headsets

I'll share with the group a very positive experience with an excellent set of headphones I've not seen reviewed for radio before - Sennheiser HD280 Pro, online most places for $99. OK, it's not the cheapest set out there like the two mentioned here, Koss SB-45 and Yamaha CM-500 (I too have the

Re: [Elecraft] K3 comments on Koss SB45 headsets

Sorry, I would qualify the recommendation for the Sennheiser HD280 based on many years experience with those headphones. It's a matter of personal fit perhaps, but I find the HD280 uncomfortable for long-term contesting use. For casual use for shorter periods of time, I would definitely give

[Elecraft] P3 TX Mon Power Measurement Anomaly

I am having an anomaly with the TX Mon power measurements on my P3s. The power varies significantly depending upon where I put the TX sensor in the RF chain (K3 -> BPF -> Alpha 87A -> Coax Stubs -> Tuner -> Antenna Coax.) I have a 3" coax jumper on the appropriate end of the P3's TX sensor. I get

Re: [Elecraft] headphone impedance

On Mon,12/28/2015 11:57 AM, Steve Ellington wrote: No problem...Just grossly out of specs. Steve, You clearly don't understand what you're reading on that data sheet, nor the design of audio output stages. I refer you to my earlier posts, and to those by W4TV, W2RU, and W3FPR. Those