[Elecraft] K3 RF REF CAL Procedure

2008-03-14 Thread Paul Christensen
Trying to get my K3 to go into Reference Oscillator Calibrate routine using Option #3 (temp compensation). I have Tech MD enabled [ON], but I cannot toggle out of REF CAL to get to REF xxC. It just stays on REF CAL regardless of tapping the 1 button on the numeric keypad. Latest K3 firmware

Re: [Elecraft] K3 RF REF CAL Procedure

2008-03-14 Thread Paul Christensen
Paul. Please check your errata sheet. This calibration method is not yet implemented in the firmware. Best method to use right now is to use WWV until the FW is ready for method 3. AhhhI did not see the back side of the errata sheet page. Tnx Greg. Paul, W9AC

[Elecraft] K3 SO-239 Connectors

2008-03-15 Thread Paul Christensen
As indicated earlier, I included a link to a photo that shows my K3's upgraded Amphenol SO-239 connectors. 216.229.20.37/images/K3.jpg The Mouser catalog P/N is 523-83-798. The Amphenol P/N is 83-798. In spending some time reviewing the placement of the K3's SO-239 connectors, the RF

[Elecraft] Re: K3 SO-239 Connectors

2008-03-15 Thread Paul Christensen
216.229.20.37/images/K3.jpg 216.229.20.37/images/K3-1.jpg The mail list server is blocking my complete, linked URLs. To access the photos, please include http://; in from of the IP address. Paul, W9AC ___ Elecraft mailing list Post to:

Re: [Elecraft] wattmeter calibration

2008-03-16 Thread Paul Christensen
Todd brings up a good point. I ran out of range while calibrating at the 5W and 50W level.. I got pretty close but ran out of adjustable range. Also, I am confused as to what is happening with the RF Gain Calibration procedure. The routine calls for setting power level at a pre-set level

Re: [Elecraft] wattmeter calibration

2008-03-16 Thread Paul Christensen
I should also state that when I was calibrating my K3 wattmeter, I was looking at three wattmeters in series -- an LP-100, Array PowerMaster, and Alpha 4510. Each wattmeter reads within 2% of each other into a Bird TermaLine load. Paul, W9AC - Original Message - From: Paul

Re: [Elecraft] Where's the bass?

2008-03-16 Thread Paul Christensen
No, it's not an issue of what communications receivers do. The Orion passband is flat down to 50hz. Agreed, Barry. While not considered traditional communications audio, expanding Rx audio bandwidth down to 50 Hz is a whole new listening experience. I also notice that in CW, the K3's Rx

Re: [Elecraft] K3/10 For Sale or Trade

2008-03-16 Thread Paul Christensen
A useful feature for K3s that don't have the sub-receiver would be to duplicate the REV function on the SUB button. What a great idea!!! :-) I'll second that motion. Paul, W9AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You

Re: [Elecraft] OT: the value of accurate measures for ham radio

2008-03-16 Thread Paul Christensen
For the life of me, I don't understand the apparent need (not just on the Elecraft reflector) for hams who want (demand) that their ham radio gear be so incredibly accurate (not to be confused with precise). Doug, the issue is not attaining lab-grade accuracy with the K3. The issue is in

Re: [Elecraft] REV Button - Rig Comfort

2008-03-16 Thread Paul Christensen
I am all for making changes to buttons to make things easier, but I wonder if some are jumping the gun a little to fast here. This is a NEW radio and it takes time for an operator to get use to it. Change is good, but change to make the rig similar to other rigs might not be the answer. Lee:

Re: [Elecraft] K3/10 For Sale or Trade

2008-03-16 Thread Paul Christensen
I have to admit that I would like to know the answer to this one too! Vic, the idea is to minimize any propensity for Tx error. Far too many ops call the DX station incessantly without listening. These are the guys I would really hate to see using A/B. If you're really cognizant about

Re: [Elecraft] REV Button - Rig Comfort

2008-03-16 Thread Paul Christensen
Please leave the REV button exactly as it is now, for those who like it that way. But if the sub-rx is not installed, please also make the unused SUB button do the same as the existing REV button. Agreed, Ian. I mis-spoke as to activating the REV function by depressing SUB via a menu item.

Re: [Elecraft] K3 power cable

2008-03-17 Thread Paul Christensen
You either crimp or Solder - not both I crimp and solder. But an explanation is in order: I begin by crimping the PowerPole connector to the stranded wire. When the crimp is complete, I then apply silver bearing solder ONLY to the very tip of the stranded wire where it butts up against the

Re: [Elecraft] K3 2.7kHz filter DSP FC

2008-03-19 Thread Paul Christensen
If the center frequency was set to 1.225 KHz (or close) as you suggest, then the 2.7 KHz filter would let though too much opposite-sideband energy. We want some stopping power down close to zero Hertz, so the filter edge is kept 250 Hz above zero. Bruce, as Barry points out, the K3's audio

Re: [Elecraft] K3 2.7kHz filter DSP FC

2008-03-20 Thread Paul Christensen
Billions of people are quite happy with the 300kHz cutoff used by the public telephone system (a total of 3.1kHz between 300 and 3.4kHz). Presumably, you mean 300 Hz, and not 300 kHz. The critical frequency for speech communications is the lowest formant frequency; it is the resonances in the

Re: [Elecraft] Straight Keys, Paddles and Bugs

2008-03-24 Thread Paul Christensen
Because of this, I've changed my tune and I now recognize that a straight key is not a beginner's tool, but is for the intermediate CW operator. Keith, It's commendable that your kids have shown an interest in Morse. I learned basic letter formation using a straight key, but only for the

Re: [Elecraft] Katiegram - Stay or go, yes or no

2008-03-27 Thread Paul Christensen
Rethink the kit. I got mine in kit form, #501, and it isn't right yet. OTOH, when I received my kit, I was dreading the assembly process. I have built many kits and home-brew transceivers through the years, so the enjoyment of step-by-step assembly was lost many years ago. I enjoy the

Re: [Elecraft] K3 CW rise time mod - Definition

2008-03-30 Thread Paul Christensen
I would like to see someone please take this discussion one step further and define the terms hard keying and soft keying, and describe how either an operator or someone listening would be able to discriminate between the two. Gary, this topic has been covered in great detail in nearly

Re: [Elecraft] K3 CW rise time mod - Definition

2008-03-30 Thread Paul Christensen
Terms such as tightening up key shaping and soft keying and hard keying are neither used nor defined in the latest issue of the Handbook. My 1998 issue of the ARRL Handbook discusses the relevancy of hard keying on p. 15.7 and even uses that term to try and describe the effect. On the same

Re: RE: [Elecraft] K3 power supply question

2008-04-01 Thread Paul Christensen
problem. You probably can make a decent connection without a special tool--it's just harder to do. I would suggest that if someone does not have a precision APP crimp tool that they simply solder the pins, despite the fact that in the long run, cable flexing and vibration will eventually

Re: [Elecraft] K3 - Expedition version

2008-04-06 Thread Paul Christensen
of articles in NCJ a few years ago providing details. Anyone have the title/author of the NCJ article(s)? Paul, W9AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr.

Re: [Elecraft] K3 Mic Gain vs ALC

2008-04-07 Thread Paul Christensen
Not only SSB. I have overshoot on CW. This problem appears to be rig-specific. I just duplicated his test using three wattmeters in series, together with a Bird 4273 RF sample. The sample feeds a Tektronix SC504 oscilloscope. My wattmeters are the Alpha 4510, LP-100, and Array

[Elecraft] K3 CW Rx Audio

2008-04-20 Thread Paul Christensen
I tried something last night that may be of interest to some CW ops. Although most of us are always in search of ways to narrow CW bandwidth, there are times when listening to CW is made more enjoyable when the receiver is allowed to open up a bit, especially with AFX activated. In order to

Re: [Elecraft] K3 CW Rx Audio

2008-04-20 Thread Paul Christensen
Doug, I can't, for the life of me, figure why anyone would want to listen to cw with a really wide filter, but. I can't, for the life of me, figure why anyone would want to partake in contesting. Listening to CW with a wide filter often reveals keying effects that are otherwise masked

Re: [Elecraft] K3 CW Rx Audio

2008-04-21 Thread Paul Christensen
In the CONFIG menu, there is a SPLT SV entry which you can turn ON to save the split. I just tried it on #202 with latest firmware and it works here.73, Ken K3IU Ken, Good job. With that suggestion, the entire procedure I mentioned (including split recall) is now automated by saving into

Re: [Elecraft] K3 CW Rx Audio

2008-04-21 Thread Paul Christensen
a bit confusing. Bob NW8L On Mon, Apr 21, 2008 at 6:44 AM, Paul Christensen [EMAIL PROTECTED] wrote: In the CONFIG menu, there is a SPLT SV entry which you can turn ON to save the split. I just tried it on #202 with latest firmware and it works here.73, Ken K3IU Ken, Good job

Re: [Elecraft] Concern

2008-04-28 Thread Paul Christensen
I'm sure Eric and Wayne are quite capable of filtering these requests based on value, need and priority. Most successful companies want, and depend on constructive feedback like this. Paul, W9AC - Original Message - From: K3KO [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent:

Re: [Elecraft] K3 low PEP Power on SSB

2008-04-29 Thread Paul Christensen
The standard Kenwood wiring has the 8 volts or so on a different pin than the Elecraft uses. I think the Kenwood is pin 5, and the Elecraft is pin 6--or maybe I have that backwards. But there is a difference. That's news to me. Can someone confirm that the +8VDC is on another pin other

Re: [Elecraft] K3 low PEP Power on SSB

2008-04-29 Thread Paul Christensen
See FAQ on Elecraft Web site under Microphone connections. Bias is on pin 6. Bob Serwy - N9RS I see it and it states this: The K3 8-pin microphone connector is wired the same as the K2 using the Kenwood pin-out. The pin-out may be close to Kenwood's, but it is not the same. I literally

Re: [Elecraft] K3 low PEP Power on SSB

2008-04-29 Thread Paul Christensen
Click on the DIAGRAM button and look at the pin out. Bob Serwy - N9RS Right, based on the diagram, it is not 100% compatible with Kenwood. Paul, W9AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to

Re: [Elecraft] Re: Perfect K3 Speaker

2008-05-04 Thread Paul Christensen
My pick is the RadioShack Optimus 8 or 11. I believe these are long out of production but widely available used on the Internet. I also second N4LQ's recommendation on the MFJ ClearTone for CW. I think the audio fullness of the existing K3 speaker could be substantially improved with the

Re: [Elecraft] K3 FIRMWARE UPDATE: MCU 1.87, DSP 1.69 (Finally!)

2008-05-04 Thread Paul Christensen
Can someone confirm the default file location for the K3 update utility when updating through the Internet? Tnx! - Original Message - From: Lyle Johnson [EMAIL PROTECTED] To: G4ILO [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Sunday, May 04, 2008 2:47 PM Subject: Re:

Re: [Elecraft] K3 BETA FIRMWARE RELEASE -- MCU rev 1.94

2008-05-13 Thread Paul Christensen
I'm not sure if this has been mentioned before, but after a F/W upgrade, I found that I need power down the K3, then re-press the power button. Otherwise, some anomalies exist, including elevated headphone hiss and slight clicks in the monitor when sending CW.I've now noticed this on at

Re: [Elecraft] K3 - ESSB Availability

2008-05-29 Thread Paul Christensen
Every time I see the term ESSB I see red. I wonder if these folks have ever read FCC Part 97.307 (a) Emission Standards: (a) No amateur station transmission shall occupy more bandwidth than necessary for the information rate and emission type being transmitted, in accordance with good

Re: [Elecraft] [K3] Re: Re: K3 VS 7600 She rwood List

2009-09-06 Thread Paul Christensen
Very few of the 7600,7700 and 7800 owners will recognize that K3 costing way less is equal or superior on some cases than theirs,surely they feel embarrased to have spent so much in such those Icoms when then we with $3K or less are doing the same job they do... Like Johnny, I have most of

[Elecraft] K3 AF/RF Mod

2009-09-10 Thread Paul Christensen
Okay, I couldn't leave well enough alone... Yesterday morning, I was working a T30 station split on 40m with the K3's Sub Rx and became a bit unnerved with the manipulation of the K3's Sub AF control when balancing between Main and Sub receivers. Multiple quick reaches for the balance

Re: [Elecraft] K3 AF/RF Mod

2009-09-10 Thread Paul Christensen
Message - From: Paul Christensen w...@arrl.net To: elecraft@mailman.qth.net Sent: Thursday, September 10, 2009 12:27 PM Subject: [Elecraft] K3 AF/RF Mod Okay, I couldn't leave well enough alone... Yesterday morning, I was working a T30 station split on 40m with the K3's Sub Rx and became

Re: [Elecraft] REF CAL

2009-09-12 Thread Paul Christensen
Being able to lock my K3 to an external 10MHz reference might be nice someday though. That might make it more stable but it won't make it more accurate. For the reason why, see: http://n2.nabble.com/Ref-Osc-Cal-Method-4-td2595451.html#a2595451 Wes, I read your description, but are you

Re: [Elecraft] K3 -AM Broadcast on 1800 Khz?

2009-09-18 Thread Paul Christensen
WCER- Canton, OH. 500W daytime. Christian format. 1800 kHz is the second harmonic of 900 kHz. Call the station and ask to speak to its General Manager or Chief Engineer. Give the station an opportunity to assess the situation before contacting the FCC. Paul, W9Ac - Original Message

Re: [Elecraft] K3 -AM Broadcast on 1800 Khz?

2009-09-18 Thread Paul Christensen
After hearing it for several days, I called the FCC watch desk in DC. The response I received was that since the harmonic was only in an amateur radio band no action would be taken. As I recall, harmonic energy in Part 73 AM broadcast services still falls under the general emission

Re: [Elecraft] K3 1800Khz Broadcast

2009-09-18 Thread Paul Christensen
Yes, I listened at 5pm to their ID. I can still hear them but much weaker at 10pm. It IS strange that you dont hear them on 1800 Khz. Steve According to the FCC's database, WCER reduces power from 500-watts to 75-watts during their Post-Sunset Service Authorization (PSSA). This time of

[Elecraft] K3 Audio Response - Version 3.33 Firmware

2009-09-18 Thread Paul Christensen
I have attached links to three .JPG images of the K3's audio response as measured at the headphone jack with SpectraPlus FFT software. Response passband was normalized for both modes. SSB is measured through the 6K filter, and CW through the 8-pole 2.8 kHz filter. However, V3.33 SSB was taken

Re: [Elecraft] K3 firmware 2 years on and still much to do

2009-09-19 Thread Paul Christensen
But while we are waiting and waiting for the K3 to do something that is no more and no less than what other radios do, we find all kinds of other things being addressed like improvements to the audio, nice though I'm sure that is, which have far more recently become an issue. I won't speak

Re: [Elecraft] [K3] K3 Audio Response - Version 3.33 Firmware

2009-09-20 Thread Paul Christensen
Is this measured with high impedance probes? If I remember correctly, small caps limit low-frequency response of K3 especially with low impedance phones/speakers. Ignacy Correct, measured with a 2K-ohm load resistance at the sound card input. The purpose of the test was to measure only the

Re: [Elecraft] [K3] K3 ergonomics

2009-09-20 Thread Paul Christensen
stepping through the bands one at a time. If the K4 changes nothing else, I hope it changes that by providing a one-touch method for selecting a band. With a few changes and additions, the K3 could be turned into a K4 with reasonable effort. Here's what I envision: - Create a new

Re: [Elecraft] [K3] K3 Audio Response - Version 3.33 Firmware

2009-09-20 Thread Paul Christensen
Yes but unless the response remains that way when an 8 ohm speaker is there its not a very useful measurement. The plots were meant to observe the radical changes in audio response across various firmware. These aren't subtle changes as one can see from the unloaded plots. With 330uF caps

Re: [Elecraft] [K3] Fw: Non Amplified D104

2009-09-21 Thread Paul Christensen
Did you use the K3's MENU:MIC SEL option to choose high gain for the microphone input? Good advice from Ron. After checking that, and assuming the mic is relatively old and its past quality-of-life unknown, I would consider replacing the D-104's mic element with a similar crystal element

Re: [Elecraft] [K3] K3 Audio Mods

2009-10-08 Thread Paul Christensen
spectrogram16 while listening to AM broadcast band stations. Because of the timing of my dsp board swap with the loading of the latest beta firmware, I was never really certain what led to the improvement. Is it the hardware or the firmtware, or are both required for older K3's? Bob

Re: [Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement ship date info; New swap out option on parts order page. CORRECTION

2009-10-10 Thread Paul Christensen
This should be close but Elecraft has not updated their schematics since October 2008, so there could be differences: http://n1eu.com/K3/k3audiomod.htm Lyle and I exchanged notes on this a while back as he and I were experimenting with DSP Board component changes above and beyond the

Re: [Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement shipdate info; New swap out option on parts order page. CORRECTION

2009-10-10 Thread Paul Christensen
Why was the improvement not applied to all audio outputs, or am I missing something here? When you go through the schematic and run the response calculations, those were the only changes necessary to improve low-end response for all Rx and Tx paths. Take a look at what's happening before

Re: [Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement

2009-10-10 Thread Paul Christensen
3) At the time these capacitors were changed, *other* component changes were made to improve the *transmit* audio low frequency response. Several components were changed to improve this response for the front panel microphone, rear panel microphone, and line input paths. Lyle, As I

Re: [Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement

2009-10-11 Thread Paul Christensen
But since the capacitor values are all being increased, is it not an option simply to add conventional electrolytic capacitors in parallel to the SMT ones, as the photos on the Russian website appear to illustrate? I don't know what he has done, but it's possible to stack SMT capacitors if

Re: [Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement

2009-10-16 Thread Paul Christensen
Juan, I think your 3rd harmonic measurement is the key. If you research audio fatigue you may find that odd harmonics are particularly troublesome and that they can cause audio fatigue even when the level is below what you might consider audible. Mike, There may be several variables

Re: [Elecraft] FCC ID and DOC #

2009-10-25 Thread Paul Christensen
From: Phil Kane AFAIK there is no such thing as FCC ID for a transceiver of this sort but check with Elecraft to see if they have ever run into this. An amateur bands-only transceiver capable of operating strictly within Part 97 spectrum is exempt from FCC importation

Re: [Elecraft] FCC ID DOC # for the K2...

2009-10-25 Thread Paul Christensen
As I find the answer, I'll post to the board. Thanks, Guy, N7UN/2 The answer is that an FCC ID number may, or may not be affixed to your Part 97 transceiver. With the exception of amplifiers under part 97.315, Part 97 transceivers need no certification/authorization, even if they are

Re: [Elecraft] FCC ID DOC # for the K2...

2009-10-25 Thread Paul Christensen
Alan Bloom: Paul - I searched the following document (ET Docket No. 03-108) for the words amateur and 97 but couldn't find anything in it that exempts part 97 transceivers from anything. Could you give me a pointer to where in the document it says that? See footnote 51 of the RO, beginning

Re: [Elecraft] FCC ID DOC # for the K2...

2009-10-26 Thread Paul Christensen
Before anyone travelling to the Caribbean gets prepared and worries about showing of all of these documents, keep in mind that no one cares about someone transporting their own amateur radio through customs. Until one day when you meet that one overzealous customs officer who says: You can

Re: [Elecraft] FCC ID DOC # for the K2...

2009-10-26 Thread Paul Christensen
Faced with such a question for any equipment that didn't show a number, I would insert Not Applicable or None. Ron, good feedback. I probably wouldn't state None as it may give the impression that there should be an FCC ID number when Not Applicable would be more appropriate. Then, be

Re: [Elecraft] K3: Anyone need help with the switch-customization(macro) feature?

2009-10-29 Thread Paul Christensen
Our goal is to make this so easy that everyone can take advantage of it. We'll keep improving the instructions and samples based on your feedback. The macro routines are a great addition to the K3. I've added two routines that up until now, I was engaging manually through multiple button

Re: [Elecraft] K3 SWR Accuracy - reprise

2009-11-04 Thread Paul Christensen
That assumes there is no RF on the exterior of the coax and the SWR sensors are ideal. Neither is the case and from personal experience I can tell you that the swr meters will change readings based on coax length. The SWR *reading* may change as a function of coax length when current is

Re: [Elecraft] K3 SWR Accuracy - reprise

2009-11-09 Thread Paul Christensen
consistently lower than Jack's, ie. 1.6 on most bands with a 2.0 load. Not a big deal, but as long as you're in there tweaking the code, can you verify that it works with non-KAT3 radios as well? I'm curious -- are those who see a smaller indicated VSWR reading on the K3 meter with a 25-ohm

Re: [Elecraft] BL-2 Balun Heating

2009-11-19 Thread Paul Christensen
Gary, What frequency of operation causes the balun overheating? Assuming the balun was constructed correctly, I would begin looking at trying to optimize line length if you favor that band of operation. For example, when using a 100 ft. dipole at 3.8 MHz and 1/4-wave in height above ground,

Re: [Elecraft] K3: Yaesu copies K3's design

2009-11-23 Thread Paul Christensen
This radio is going to be very popular because it seems that a lot of the criticism of the K3's apparent failings seem to have been corrected in the new Yaesu FT5K design. Until the FT-5K is actually released and a whole new set of issues become apparent. Based on glossy product brochures,

Re: [Elecraft] K3 and Ameritron QSK-5 Connections and Settings

2009-11-27 Thread Paul Christensen
Chuck: Keep this in mind. The QSK-5's KEY 2 line activates the PIN diode circuitry. KEY 2 activates the QSK-5's input and output relays. 2) If Key 2, do you have a jumper from AUX to Key 1? Ideally, you want to jumper KEY 1 and KEY 2 together with a Y cable using steering diodes. Then,

Re: [Elecraft] K3 static electricity

2009-12-01 Thread Paul Christensen
Steve, I recall a VFO static problem with one of the Ten Tec models. My memory has faded, but I thought part of their solution used a series of highly conductive felt washers on the encoder shaft. Anyway, it would be interesting to see if Ten Tec's encoder kit for that problem could be

Re: [Elecraft] K3 static electricity

2009-12-01 Thread Paul Christensen
A little further investigating and I found this: We also had a few occasions where the operator stood up (sliding across the chair) and touched the radio [Omni VII] and got zapped - resulting in the radio needing to be turned off and on again. Unlike the ORION, this routine takes only a

Re: [Elecraft] K3: killing RX key clicks

2009-12-01 Thread Paul Christensen
All good suggestions, Ron -- including turning off the NB if not mentioned previously. Engaging the NB function oftentimes produces internally-generated clicks. Paul, W9AC - Original Message - From: Ron D'Eau Claire r...@cobi.biz To: 'Elecraft Reflector' elecraft@mailman.qth.net

Re: [Elecraft] K3: killing RX key clicks

2009-12-01 Thread Paul Christensen
When I first received my Icom 756Pro (now my backup rig) several years ago I discovered that the default rise/fall times (adjustable in one of the menus) was set to 2 msec (!). That's unconscionable... It's unconscionable with some rigs, but not all. Take a look at the K3's keying envelope

Re: [Elecraft] K3: killing RX key clicks

2009-12-01 Thread Paul Christensen
I suspect that over-driving an external amplifier is a major cause of excessive clicks on the bands today. Many Hams think that CW doesn't require the final amplifier be linear and drive their rigs into saturation. But a linear amplifier needs to be linear for CW just as with any amplitude

Re: [Elecraft] K3: killing RX key clicks

2009-12-01 Thread Paul Christensen
The 'RC rise/decay' wave shape that was in the handbooks for many years is actually a *bad* shape because it has a very sharp corner on key-up. Ian, *bad* may be a bit too harsh. The League's optimized envelope was described during a time when only simple R/C values were used to develop a

Re: [Elecraft] K3: killing RX key clicks

2009-12-02 Thread Paul Christensen
Are you sure about 2.5 ms? Yes. As far as I remember I measured my K3 to about 5 ms and Elecraft also stated 5 ms. This was over a year ago... Measure it again. The rise time changed roughly around the F/W 3.00 revision. I went back to a 2.xx version and it measured ~ 6 msec. Paul, W9AC

Re: [Elecraft] K3 Broken AF knob and bad service to geta replacement.

2009-12-03 Thread Paul Christensen
One excellent long-term solution was proposed by James, K2QI. I have since ordered my own set of nested aluminum knobs for the RF/AF controls and they are far better in fit, finish, and usability than Elecraft's stock knob set. But, they are also relatively expensive. The knobs are machined

Re: [Elecraft] K3 Broken AF knob and bad service togeta replacement.

2009-12-03 Thread Paul Christensen
To be honest I don't think they suit the look of the K3. They don't even match the other knobs. That was my thought until I actually installed the knob set. Paul, W9AC __ Elecraft mailing list Home:

Re: [Elecraft] K3 Broken AF knob and bad serviceto geta replacement.

2009-12-03 Thread Paul Christensen
as the current menu allows for 'Normal and 'Balance' audio functions. If that ever happens, the wiring mod is very easily reversible in less than a minute with no evidence left behind. Paul, W9AC - Original Message - From: Paul Christensen w...@arrl.net To: elecraft@mailman.qth.net Sent

Re: [Elecraft] K3 Broken AF knob and bad service togeta replacement.

2009-12-03 Thread Paul Christensen
First, I have no doubt the new polycarbonate knobs are much more resistant to cracking. In my case two separate knob sets cracked shortly after taking the K3 out into 30-degree WX. In both instances, the knobs were very loosely fitted during their installation. Over-tightening was not the

[Elecraft] OT - Outlet Strips

2009-12-09 Thread Paul Christensen
Please be careful about selecting budget outlet strips. I know our conditions are not identical with those in the U.S., but there have been a number of fires down here caused by cheap outlet strips. Adding to the safety concerns, someone had mentioned using a short Radio Shack extension cord

Re: [Elecraft] W2 Questions

2009-12-09 Thread Paul Christensen
Phil, With each LED representing 100-watts on the 2KW scale, it may be of some help to go from 10% to 5% in accuracy, but in the case of the W2, the display resolution is limited to 50-watts in between mid power ranges (e.g., 250-watts) but a display of 200-watts with two LEDs showing may

Re: [Elecraft] W2 Questions

2009-12-09 Thread Paul Christensen
and construction technique as well as detector design. http://www.telepostinc.com/Files/phipps-1.pdf Paul, W9AC - Original Message - From: Phil Hystad k7...@comcast.net To: Paul Christensen w...@arrl.net Cc: Elecraft elecraft@mailman.qth.net Sent: Wednesday, December 09, 2009 8:37 PM

Re: [Elecraft] [K3] RE: K3: Relay noise?

2009-12-10 Thread Paul Christensen
I recently ran into a similar issue when interfacing an Ameitron QSK-5, K3, and SPE 1K amplifier. Regardless of power through the QSK-5, it produces an audible tick when keying. Yes, there are two relays inside the QSK-5 unit, but neither is the cause. It turns out that the QSK-5's PIN

Re: [Elecraft] OT: DZKIT Sienna?

2009-12-10 Thread Paul Christensen
I had a chance to see the Sienna in person at Dayton a few years ago. It looks significantly better in person than what's seen in their ads. I haven't been following its progress, but from what I recall, it uses some fairly high-end components. The panel switches and machined knobs are

Re: [Elecraft] K3: DRM listening?

2009-12-11 Thread Paul Christensen
Some DRM modes are narrower and can be accommodated if the FM roofing filter (nominal 13 kHz) is installed. But getting the IF output to the DRM decoder still requires modifications to the K3. DRM decoding with the K3 is easy with the SDR-IQ together with SpectraVue, VAC and DReaM software.

Re: [Elecraft] Noisy K-3 Receiver

2009-12-16 Thread Paul Christensen
CONFIG: AGC THR may be set too high. Try a lower setting. I agree with Bill. He may also want to experiment with other AGC settings like AGC-F, AGC-S, AGC SLP and AGC HLD and AGC DCY. I found exactly what was described until I changed the AGC threshold/slope and equally important, the AGC

Re: [Elecraft] K3 Amplifier Keying

2009-12-16 Thread Paul Christensen
Phil, You may want to isolate all three key lines using one of the many keying buffers available. At an absolute minimum, consider using three steering diodes if only using a splitting RCA jumper cable from the K3 to the amps, using one diode (e.g., 1N4007 or if necessary, a Schottky type)

Re: [Elecraft] K3 Amplifier Keying

2009-12-16 Thread Paul Christensen
inserted into RCA plugs with just a bit of soldering necessary. Paul, W9AC - Original Message - From: Phil LaMarche plama...@verizon.net To: 'Paul Christensen' w...@arrl.net; elecraft@mailman.qth.net Sent: Wednesday, December 16, 2009 4:58 PM Subject: RE: [Elecraft] K3 Amplifier Keying

Re: [Elecraft] K3: Noisy Receiver? - not here!

2009-12-17 Thread Paul Christensen
One outstanding question that's not addressed in the announcement below relates to whether or not Main DSP Board Rev. C includes the hardware audio LPF. So, if a K3 owner purchases the K3DSPUPGD upgrade today, will it also contain the audio LPF? Paul, W9AC - Original Message - From:

Re: [Elecraft] K3: Noisy Receiver? - not here!

2009-12-17 Thread Paul Christensen
The mods are essentially the same, although Elecraft likely re-scaled R values rather than C. The end result is identical. I drafted those mods at a time when the upgrades were not yet implemented by Elecraft. Taking advantage of Elecraft's exchange program is the better choice and leads to

Re: [Elecraft] K3: Noisy Receiver? - not here!

2009-12-17 Thread Paul Christensen
That should answer the question. Many Tnx, Roger. Paul, W9AC - Original Message - From: Roger Marrotte rmarro...@verizon.net To: 'Paul Christensen' w...@arrl.net Sent: Thursday, December 17, 2009 9:29 AM Subject: RE: [Elecraft] K3: Noisy Receiver? - not here! Paul, I have one

Re: [Elecraft] Noisy K-3 Receiver

2009-12-17 Thread Paul Christensen
If it's weak signal work where this is being noticed, one test of the overall noise floor is to run the headphone output from several rigs, individually switched into a PC sound card with a FFT software program running. The AF outputs would require normalizing at various signal-strength

Re: [Elecraft] [K3] K3 Rev C +AF filter

2009-12-17 Thread Paul Christensen
Thanks for the info. But since there is allegedly no such thing as a stupid question, may I ask whether only the main DSP board should be replaced. The Main DSP board routes the sub Rx audio and so, there's no reason for a sub DSP board replacement. Paul, W9AC

Re: [Elecraft] K3 receiver noise questionable test results

2009-12-18 Thread Paul Christensen
Back down the value of AGC THR in the menu, turn down RF Gain, turn up your AF Gain and turn off your preamp on 160-20M. Adding to that...AGC SLP has a profound effect on the AGC compression ratio. Higher settings make all signals sound relatively the same. A few posts back, I recall

Re: [Elecraft] [K3] K3 Receiver Noise Level -- Evaluation and Adjustment

2009-12-20 Thread Paul Christensen
It seems to me that there is some non-linearity in the audio stages that sets in at a fairly low level. I'm not an expert either, but might the isolating transformers in the line output be the cause of this? Yes, see Jack Smith's work on the topic

Re: [Elecraft] [K3] kit building or buy ready for use

2009-12-21 Thread Paul Christensen
Phil, Building the K3 will likely make future hardware changes easier to implement since you will have recognized key circuit board areas and have an understanding of the assembly/disassembly process. Getting in and back out of the K3 is very easy. By contrast, the disassembly of my

Re: [Elecraft] K3 Bottom Front Panel Issues

2009-12-30 Thread Paul Christensen
Oh yeah, get some new, quality screw drivers.. Excellent advice and probably one of the best investments made when assembling or performing work on the K3. At first, I purchased new #0 and #1 Phillips-head drivers from Klein Tools. The K3 assembly manual warns against the use of power

Re: [Elecraft] K3 needs survey -- firmware and application software

2009-12-31 Thread Paul Christensen
An KIO replacement board that has a direct computer connection via USB, with built in sound card function, built in CAT com port function etc. so that there is only one cable to the PC. A very well-thought list and I'll second Mario's input, particularly a USB-based KIO board as a universal

Re: [Elecraft] More on N0SS K3 External Speaker Splitter

2010-01-05 Thread Paul Christensen
It's unfortunate that 1/8-inch TRS jacks have become so popular in the consumer audio world. Their use seems to have accelerated with the advent of PC sound cards. My experience has been that pro-grade 1/4-inch TRS connectors are more reliable than any 1/8-inch type as well as

Re: [Elecraft] More on N0SS K3 External Speaker Splitter

2010-01-05 Thread Paul Christensen
Forgot to add that for high-density applications, Sub-D connectors are excellent when maximum reliability and easy disconnect are needed. I like to use crimp Sub-Ds where the pin can be inserted into the connector body. That goes much faster with better repeatability than the solder Sub-D

Re: [Elecraft] OT: Softrock for K3 IF

2010-01-08 Thread Paul Christensen
I found an article here http://www.kingsqueak.org/stuff/softrock_IF_tap.pdf that shows a buffer amp that can be built from parts most people probably already have... His buffer consists of a pair of cascaded FET source-followers. It would be a good idea to measure reverse isolation of the

Re: [Elecraft] OT: Softrock for K3 IF

2010-01-08 Thread Paul Christensen
amp with a low source Z. Paul, W9AC - Original Message - From: Paul Christensen w...@arrl.net To: elecraft@mailman.qth.net Sent: Friday, January 08, 2010 7:25 AM Subject: Re: [Elecraft] OT: Softrock for K3 IF I found an article here http://www.kingsqueak.org/stuff

Re: [Elecraft] K3 how often do you use it?

2010-01-11 Thread Paul Christensen
I find the K3 pretty much the ideal size for my purposes. The front panel is not cluttered but comprehensive enough that there is little need for daily changes to menu items. In the future, hopefully we'll see detachable front panels where a small or large stand-alone panel format cold be

Re: [Elecraft] K3 Audio Upgrade Mod

2008-12-04 Thread Paul Christensen
I would argue for the piggyback approach. Use a pair of sprung tweezers that can grasp the SMT resistor at a comfortable angle. At first, I detested working with SMT parts. I slowly got over it and have developed a certain comfort level but I almost need to meditate first as the iron is

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