Re: [Elecraft] K2: Can the KPA100 and KAT100 Live in the same EC2 box?

2007-10-10 Thread Don Wilhelm
Kevin, The KAT100-2 has all the 'hooks' to mount the KPA100 in the same EC-2 enclosure. If you already have a KAT100-1, there is a conversion kit to add the missing pieces, but you will have to order the EC2 enclosure separately. This is a 'no holes' solution. 73, Don W3FPR KBG Luxford wro

Re: [Elecraft] K3/K2: RS-232 cable

2007-10-11 Thread Don Wilhelm
JT and all, Pins 2 and 3 are not swapped on the K2 either. The problem is that the K2 used the nomenclature differently than the K3. The K2 used 'TXD' to denote the line *it* was sending on and 'RXD' to denote the line it was receiving on. The K3 apparently uses the opposite nomenclature a

Re: [Elecraft] K3/K2: RS-232 cable

2007-10-11 Thread Don Wilhelm
I had a typo in the last part of my previous note. That should have been *K3*. Do *not* use a standard serial cable with the K2! Sorry, Don W3FPR Don Wilhelm wrote: So *if* only RXD and TXD with Signal Ground are needed for the application, yes, the K2 cable (computer end, not KAT100 or XV

Re: [Elecraft] KAT100 Question on SWR/Operation

2007-10-13 Thread Don Wilhelm
Lee, The KAT100 (note no dashes in Elecraft model numbers - except for the N-Gen :-) ) does not automatically go to a bypass mode. If you tune it into a 50 ohm resistive load, you may find it tunes to some small inductance and capacity in-circuit and may actually increase the SWR a small bit

Re: [Elecraft] K2: VFO stuck on 15M

2007-10-13 Thread Don Wilhelm
JT, Those symptoms could indicate that the 15 meter entries in the EEPROM have been corrupted. Try running CAL PLL before doing anything else - don't forget to plug the frequency counter into TP1 and switch to 40 meters. If CAL PLL does not correct it, record all your menu entries and try a

Re: [Elecraft] [BL1] Seems lossy in all useful configurations

2007-10-13 Thread Don Wilhelm
David, Most any indoor antenna is in close proximity to the transceiver, and it is quite likely (even with the most carefully balanced antennas) to have RF floating around most everywhere, including the transceiver chassis and any earthing wires. I would suggest that you may be better off tr

Re: [Elecraft] [K2] Is TX frequency susceptible to RF on chassis?

2007-10-14 Thread Don Wilhelm
David, I do not believe that RF on the chassis could easily cause a frequency shift, but then who knows because each situation like that is different. I suggest that you first take a good look at your SSB FL1 filter for both LSB and USB. If you have the curently normal SSB filter width of 2

Re: [Elecraft] [K2] Is TX frequency susceptible to RF on chassis?

2007-10-15 Thread Don Wilhelm
73, Don W3FPR David Woolley wrote: Don Wilhelm wrote: refer to the K2 Dial Calibration article on my website http://w3fpr.qrpradio.com for techniques to accurately set the 4 MHz reference oscillator and the following steps to achieve good dial calibration. Unfortunately, the sun doesn

Re: [Elecraft] K2

2007-10-15 Thread Don Wilhelm
RC, While the Elecraft W1 is a good instrument and has LEDs to indicate the level, I believe the steps between the illumination of each progressive LED are too large to substitute for an analog meter. If your DMM has a pseudo-analog bar display, you could use that in conjunction with an RF P

Re: [Elecraft] [K3] clarification on VFO and 2nd Rx

2007-10-16 Thread Don Wilhelm
David, It may help if you mentally divorce the physical VFOs from the A and B designations and think of the DISPLAYED frequencies. The main receiver will receive on whatever frequency is displayed on the VFO A readout, the sub-receiver (if installed) will receive on whatever frequency is dis

Re: [Elecraft] [K3] clarification on VFO and 2nd Rx - erratum

2007-10-16 Thread Don Wilhelm
these are things I'll be able to figure out once I get the K3, but I got to do something while I'm waiting for the Big Brown Van On 16/10/07 14:18, "Don Wilhelm" <[EMAIL PROTECTED]> sent: David, It may help if you mentally divorce the physical VFOs from the A a

Re: [Elecraft] [K2] No RTTY Output

2007-10-16 Thread Don Wilhelm
Ken, First, investigate the filter settings for RTTY with Spectrogram. Be certain the FL1 positions are correct (use the OP1 filter and set the BFOs similar to those used for SSB FL1). You may set the RTTY FL2, FL3, FL4 filters any way you wish, but FL1 must be set to OP1 and the BFOs corre

Re: [Elecraft] [K2] K2/100 - where does all the hot air go?

2007-10-16 Thread Don Wilhelm
Stephen, The air exits just behind the front plate - through the fins of the heat sink. There is lots of exit area, no need to worry. As far as just how fast the fan comes on, that depends on the temperature (of the heat sink at the PA transistor locations). CAL TPA must be set in the menu

Re: [Elecraft] [K2] Problem with MH2 and K2/100

2007-10-16 Thread Don Wilhelm
Joe, I am not certain why the Elecraft mike would have that kind of problem and not the Icom mic. I have trouble believing it has anything to do with the particular mike. Get out the computer and Spectrogram (or similar tool) and check the position of the IF filter passband for both LSB and

Re: [Elecraft] T1 connections

2007-10-17 Thread Don Wilhelm
Jonathan, I don't really know why the T1 would be off topic here, but ... The answer to your question has two parts: 1) in theory, a half wave wire is an antenna complete in itself and does not need anything else - and that is true whether it is fed at the end or at the center or anywhere in b

Re: [Elecraft] [XG-2] A little help with math

2007-10-17 Thread Don Wilhelm
Ken, I believe those units are already dBm - nothing else makes sense, and there is a missing minus sign on the last one. +81.5 dBm would be a very large signal - 141.3 kilowatts into 50 ohms - minus 81.50 dBm does make sense. If you want a handy tool for dB calculations, you may want to do

Re: [Elecraft] Sidetone

2007-10-18 Thread Don Wilhelm
Joe, Easy - go into the menu, select ST L, then press EDIT to edit the parameter. Tap DISPLAY to toggle the sidetone source. When you hear sidetone, stop tapping DISPLAY. 73, Don W3FPR Joe Fowler wrote: Well, I did it. While playing with my K2's menu, I killed my sidetone. Any Ideas? Tnx

Re: [Elecraft] OT: News Article on "Tin Whiskers" Ruining Electronics

2007-10-18 Thread Don Wilhelm
Typical of news reports, the media seems to concentrate on the sensational. Certainly, the proliferation of throw-away consumer electronics ending up in landfills is a grave concern for adding to the lead content of our environment, and I applaud the efforts to keep that to a minimum. But, c

Re: [Elecraft] OT: News Article on "Tin Whiskers" Ruining Electronics

2007-10-19 Thread Don Wilhelm
RoHS compliance. This is really a two-edged sword. 73, Don W3FPR Mike S wrote: At 12:28 AM 10/19/2007, Don Wilhelm wrote... The 'tin-whiskers' problem is one that exists mainly at the chip level. The migration of conductive paths between pins that can be soldered by hand techniques is

Re: [Elecraft] KAT2: Can't Get Bridge Null Adjustment (C55) Below 012 mV

2007-10-19 Thread Don Wilhelm
Michael, Although an absolute null would indeed be zero, the 10 to 12 range is about as low as you can get - the K2 display is reading in millivolts and there is some noise picked up and coupled into the op amp input which limits the low end of the reading capability. The same problem is tru

Re: [Elecraft] OT: News Article on "Tin Whiskers" Ruining Electronics

2007-10-19 Thread Don Wilhelm
It is not all in the solder, the problem even for RoHS exemptions is the tin plating on the components. 73, Don W3FPR Matt Palmer wrote: main problem with the article is both space programs and military are exempt from being ROHS compliant, so why would lead free solder be in a satellite?

Re: [Elecraft] first K2 problem

2007-10-20 Thread Don Wilhelm
Dom, Look first for an unsoldered connection somewhere on the Control Board or on the Front Panel Board (the control board is the most likely place for the problem). Often unsoldered connections can work for several years before they develop enough oxidation to cause a break in what was only

Re: [Elecraft] K2 "strange" Rx tuning effect

2007-10-21 Thread Don Wilhelm
Denis, That little 'chirrup' should go away after you run CAL PLL. Make certain you have the bottom cover in place when you do run it. L34 tuning is quite broad and should be adjusted for the best signal to noise ratio. Rather than using a signal generator, the best method is to turn on th

Re: [Elecraft] [K2] Frequency Counter Gate Time Short

2007-10-21 Thread Don Wilhelm
David, The procedure which relies on tuning to a broadcast signal of known frequency and uses the internal counter (along with some swapping of the counter probe between TP1 and TP2) eliminates any slight error in the 'exactness' of the 4 MHz reference - it is automatically equalized out of t

Re: [Elecraft] [K3] Speaker magnetic shield sticky pad?

2007-10-25 Thread Don Wilhelm
Dave, I don't know what your past experience with double sided foam pads have been, but --- If you have ever tried to remove the speaker shield from the speaker in a KPA100, you would be convinced about the truly sticky nature of the adhesive used on the Elecraft speaker shields - it is real

Re: [Elecraft] K2 power control loop damping (was 'KPA100 Problem')

2007-10-27 Thread Don Wilhelm
Jim, A bit of operational theory first: The K2 power control circuit is a feedback control loop which includes the gain of the entire transmit chain in its control loop. As a result, when the KPA100 is added, the loop gain for some K2s is increased so much that the loop oscillates. A quick s

Re: [Elecraft] KPA100 capacitor question

2007-10-27 Thread Don Wilhelm
Werner, Unfortunately, there is no universally accepted way of marking capacitors, so I can only guess a bit here. What I do know is that the 100 pf capacitors that have shipped with recent Elecraft kits have short leads. Those small leads tend to hide themselves stuck in other components.

Re: [Elecraft] K2 Ser 6160 lives but............

2007-10-28 Thread Don Wilhelm
Denis, Your 12/10 meter problem will likely be found either in the Low Pass Filter or the Bandpass filter area. Look for an improper component value or a bad solder connection. Your audio problem (and sidetone) sound suspiciously like bad solder connections. Check the Control Board over ca

Re: [Elecraft] Elcraft K2 6216, Problem with Voltage Sensor on Control Board

2007-10-29 Thread Don Wilhelm
Richard, U3B should be easy to test. The voltage at pin 7 should always be the same as that at pin 5. Set the P7 jumper to the EXT position and use the internal voltmeter probe while checking. Connect the probe to the 5 volt regulator (U5) output pin and monitor the voltage at U3 pin 5 with y

Re: [Elecraft] Alignment/Test II assistance request

2007-10-30 Thread Don Wilhelm
Rod, I believe you had a typo - the PLL range must be between 9.8 and 15 kHz, so your PLL range is on the low side by quite a bit, and should be corrected (it could possibly be the cause of your 'no signals on 40' situation). First do some more verification steps - carefully check the solder

Re: [Elecraft] [K1] Spectrogram Question

2007-10-30 Thread Don Wilhelm
Clark, What were you using as input to the K1 antenna? You must have a source of wideband noise that is well above the noise floor of the receiver to see a well defined passband shape in the Spectrogram display. If you did have a good display of the passband shape, and you see little reduct

Re: [Elecraft]US Postal Service Express Mail to the UK - update

2007-10-30 Thread Don Wilhelm
For those interested in shipping times to England, I recently sent a KPA100 from North Carolina to a ham in Barnstaple, England by USPS Priority Mail and it was in his hands 13 days later. Times will vary, but if I understand correctly, much of the time variation seems to be time waiting for t

Re: [Elecraft] (K2) PROBLEM WITH SSB

2007-10-31 Thread Don Wilhelm
Michael, When the KI6WX KSB2 Increased Gain Mod is added and used with the KPA100, there is a good chance that the ALC circuits on the KSB2 board will be overdriven. This situation was identified about 3 years ago and can be found in the reflector archives for those who wish to view the orig

Re: [Elecraft] KAT2 Bump

2007-11-01 Thread Don Wilhelm
Matt, It does sit flush when fully seated. You may have one of two problems. The first thing to check is your soldering of the individual sockets to the wires. If you allowed solder to wick up into the socket area, you have plugged the hole for the pin and it will never fit fully on - it o

Re: [Elecraft] K2: Temperature of driver Q6 during keydown

2007-11-02 Thread Don Wilhelm
Michael, If you are talking of continuous key-down, that long a period could cause a problem. The K2 power should be limited to 5 watts for continuous keying (or continuous duty data modes). 'Transmit cycles' of 15 minutes would be transmitting normal CW as in a QSO - that places the maximum

Re: [Elecraft] KPA100 Upgrade Kit

2007-11-02 Thread Don Wilhelm
Werner, I do believe the 1/2 watt designation is a typo - I have not seen a 1/2 watt resistor as part of the upgrade kit. Since you ordered the KPA100UPKT, send an email to [EMAIL PROTECTED] and ask for the 0.22 uf capacitor that is used at C31. This capacitor *should* be included with the KP

Re: [Elecraft] KPA100 Upgrade Kit

2007-11-03 Thread Don Wilhelm
Werner, If you look at the new KPA100 schematic and parts list (download the new manual), you will see that C31 has a value of 0.22 uF. The KPA100UPKT instructions tell you to change the value on the schematic, but there is no new C31 included with the kit. In fact, I was directly involved

Re: [Elecraft] K2 Tuning Knob

2007-11-03 Thread Don Wilhelm
And I might add that if you cannot obtain the knob itself, you might inquire about the rubber tire. The tire from the FT-900 is best if it is still available, but the FT-100 tire will work too. With a bit of a stretch, either will fit over the stock K2 knob. If you like the finger dimple, El

Re: [Elecraft] SS "Strangenss"

2007-11-05 Thread Don Wilhelm
Kurt, Check your KX1 menu setting for the STP parameter - the KX1 should offset by that amount during transmit. When you said "I knew I was on the calling stations frequency" - do you mean that you tuned the station to the same audio frequency as your STP menu parameter? If so, then your tr

Re: [Elecraft] from John Klokis kb3hqh

2007-11-05 Thread Don Wilhelm
John, Did the KAT100 come with a cable to hook it up? If so, it should have 3 connectors on that cable. The center one plugs into the K2/100, the one at the (usually longer) end with a female DE9 connector (has sockets not pins) on it will plug into the computer. The shorter end with the ma

Re: [Elecraft] from John kb3hqh

2007-11-05 Thread Don Wilhelm
John, Elecraft does not sell pre-assembled cables. The one you have there sounds like it is the correct one. It is both a serial cable (the long end) and a K2 to KAT100 communication cable. The conductors used are different on each end of the cable. You must connect the *center* DE9 conne

Re: [Elecraft] OT: Motorola buys Yaesu. Wow!

2007-11-05 Thread Don Wilhelm
1000 FT-2000s is not a large number! Compare that with over 6000 K2s, about 2500 K1s and at least 1800 KX1s if I recall the serial numbers that have come to my attention. I have no idea how many K3s are on order, but my guess is that it is close to 1000 already. 73, Don W3FPR Mike Fatchett

Re: [Elecraft] K2 - Transformer T4 upside down

2007-11-06 Thread Don Wilhelm
Euan, Wires 1 and 2 are on the same winding, and 3 and 4 are the other winding, and it is symmetrical about the axis that tuns through the center of the core. In other words, if you flip it over in that manner, it looks the same - no need to change it. Now if you had turned it around the ot

Re: [Elecraft] mic plug for K2

2007-11-06 Thread Don Wilhelm
Drew, If you have to order on-line, try Buxcomm (www.buxcomm.com). Look for their CBC8 - it is $1.95 and no minimum order. Google for 8 pin microphone connector to find many other sources. 73, Don W3FPR [EMAIL PROTECTED] wrote: Does anyone know where I can get a 8-pin mic plug for the K2?

Re: [Elecraft] K2/100 & SB-1000 Amplifier

2007-08-10 Thread Don Wilhelm
Leigh, The N0SS amp keying circuit for the QRP K2 requires only the 8R, +6 volts and ground. Yes, you could contain the entire amp keying board within the top cover and use one of the BNC sized transverter holes for the output connector (or drill a new hole). The 8R signal is available at t

Re: [Elecraft] Noise Problems...still

2004-08-01 Thread Don Wilhelm
Terry, It does sound like you are making good progress. Take things one step at a time and you will get up to speed - don't try to rush it. Are your tuned radials right on the ground? If they are, the proximity to ground will de-tune them negating all your hard work!!! If you can elevate them

Re: [Elecraft] Can't calibrate K2 narrow RTTY filters to 2.2KHz (hightones)

2004-08-01 Thread Don Wilhelm
Guido, The BFO RANGE is not sufficient to set the BFO far enough from the carrier and permit a tone of 2295 Hz on both sidebands. You will need a minimum range of 4590 Hz (and likely at least 500 Hz more will be required for a comfortable margin). Your range is only 4180 Hz. You could try incre

Re: [Elecraft] email reflector headers glitch or "feature"

2004-08-01 Thread Don Wilhelm
Folks, I have not really seen a difference, but after looking the headers have changed. I filter on [Elecraft] in the subject line and that has worked well for me. 73, Don W3FPR - Original Message - > In general, To and From headers shouldn't be used to filter list traffic. Properly u

Re: [Elecraft] 2.3kHz KSB2 feedback

2004-08-01 Thread Don Wilhelm
Folks, I didn't know that the 2.2 (or 2.3) kHz SSB filter had become the 'standard', but it does get my vote. I have long advocated the KI6WX 2.2 kHz filter bandwidth as my choice for a great compromise between 'punch' for QRP operation and good SSB fidelity. It does offer a flatter passband tha

Re: [Elecraft] Long wire balun question

2004-08-01 Thread Don Wilhelm
John, There is not much you can do about the antenna efficiency short of changing the physical characteristics of the antenna itself - if it works, it works and the voltage/current relationship at the feedpoint will determine its impedance and how easily it can be matched. A balun does not make s

Re: [Elecraft] Long wire balun question

2004-08-02 Thread Don Wilhelm
John, For your long wire situation, one set should be sufficient to provide adequate RF grounding at your tuner loaction - or if you prefer you could use an artificial ground instead (see recent discussion on the reflector). The situation with a monopole antenna is quite different than feeding a l

Re: [Elecraft] Like MFJ's 931 Artificial Ground ?

2004-08-02 Thread Don Wilhelm
Vic, You are entirely correct - and I have long advocated thinking about the 'ground' terms separately. It should be common knowledge (but it isn't) that one 'ground' can be at a different potential than another 'ground'. I learned early in my hamming days because we often referred to 'chassis g

Re: [Elecraft] K2

2004-08-05 Thread Don Wilhelm
Rolf, Just a guess based on limited information -- if you have the Elecraft antenna tuner installed, you may have changed from ANT1 to ANT2 and have the antenna connected to ANT1. Ask what you have changed in the menu since it last worked. 73, Don W3FPR - Original Message - > Hi every

RE: [Elecraft] K2 output @2W

2006-02-04 Thread Don Wilhelm
Steve, If you are seeing an oscillation of the power output level, you might try reducing the ALC loop gain. One can increase the value of R98 on the RF Board to decrease the gain through the K2 power determining ALC loop. If the value is increased too much, the power output on 10 meters will be

Re: [Elecraft] K2 RFC15?

2007-11-12 Thread Don Wilhelm
Jerry, Different manufacturers use different body colors - the Elecraft manuals are slowly being scrubbed to eliminate any references to body colors as identifying markings - the only real markings that count are the color coded bands. So yes, leave RFC13 as is and use one of the other 100 u

Re: [Elecraft] Small power supply for a K1

2007-11-12 Thread Don Wilhelm
I do not have specific suggestions and you have already received several that are workable, but I would caution about using a wall wart with any gear. Most wall wart supplies are not regulated and have a no-load output voltage well above the voltage marked on the case. I have several '12 VDC'

Re: [Elecraft] KPA100 first test question

2007-11-12 Thread Don Wilhelm
Werner, While there is nothing wrong with testing it in the EC2, that throws two or mare variables into the equation - the KIO2 and the cables. I recommend that you first do the setup and testing with the KPA100 laying upside down on the right side of the K2 with the normal connections. The

Re: [Elecraft] Co-ax for the K2

2007-11-12 Thread Don Wilhelm
Art, I would use the RG6 coax which is commonly available at Home Depot and Lowes. If you want to use PL-259 connectors, the adapters for RG59/RG8X will normally fit. Even though it is 75 ohm, and in a 50 ohm system will operate with an SWR of 1.5 - if you look at the loss figures carefully

Re: [Elecraft] Co-ax for the K2

2007-11-12 Thread Don Wilhelm
Doug, I beg to differ. There are physical properties that give rise to the characteristic impedance which are related to the dielectric properties and the relative conductor diameters for the center conductor and the braid. These same properties will create a particular RF voltage handling

Re: [Elecraft] KPA100 first test question

2007-11-13 Thread Don Wilhelm
Werner, If you connect only the KPA100, the stock inductor is usually fine. If you have aspirations to add the KAT100, or the Elecraft transverters, then you should replace the stock inductor. About 12 turns of wire on a small ferrite toroid core should work nicely. 73, Don W3FPR Dr. Wern

Re: [Elecraft] OT: pwr rating of RG6, etc

2007-11-13 Thread Don Wilhelm
You use it because of 2 characteristics. 1) It has lower loss than an equal physical size 50 ohm cable - and that is true even considering the added loss due to mismatch. 2) It is conviently available and inexpensive. Considering the added loss due to a 1.5 SWR, look at the charts. If the m

Re: [Elecraft] [K2] ATU

2007-11-13 Thread Don Wilhelm
Kristina, The KAT2 has a much greater tuning range, handles 2 antennas and remembers the last tuned settings for each band on both antennas. Communication between the K2 and KAT2 is automatic and quite painless. Of course, if you need a remote tuner (mounted at the antenna for example), the

Re: [Elecraft] OT: pwr rating of RG6, etc

2007-11-13 Thread Don Wilhelm
Peter (and interested others), You might want to peruse the article "Antennas, Transmission Lines, and Tuners" at my website http://w3fpr.qrpradio.com. The article tries to flatten several myths in terms that should be understood by most hams - no math, but I believe a good explanation of pr

Re: [Elecraft] Installation of a KXB30 in KX-1

2007-11-13 Thread Don Wilhelm
Kieth, I use 'Goop' on those pads. The pads will stick nicely to a flat surface, but the solder leads on the KXB30 are just not flat enough. Super-Glue and other thin adhesives do not have the gap filling characteristics that are needed. An alternative to Goop is something like 'ShoeGoo'.

Re: [Elecraft] K2 - KDSP2 Circuit Diagrams

2007-11-14 Thread Don Wilhelm
Kevin, Since you are searching for a possible break in the board traces or a thru-plated hole, you may do better with a scan of the board rather than the schematic. There are scans of the KDSP2 board available at Tom Hammond's website www.n0ss.net 73, Don W3FPR KBG Luxford wrote: I am tryi

Re: [Elecraft] Need some help on a K1 problem.

2007-11-15 Thread Don Wilhelm
Len, Are you certain it is a relay problem? Does your 4 band board work on 15/17 meters without manually setting any relays? If it is a relay problem, the reset state of the relays is with the 15 meter band selected and you should be able to align and operate it on that band. Can you turn t

Re: [Elecraft] K2 s/n 4276 Output Power Instability

2007-11-15 Thread Don Wilhelm
William, You said 40, 30 and 20 worked once, but not now - that says any problem is in an area shared by all bands. The first thing to do would be to check the coax cables, any adapters and the dummy load for a bad connection. I prefer to reduce any extra things in the setup because they too

Re: [Elecraft] KAT100 with Ladder Line

2007-11-15 Thread Don Wilhelm
Curt, There seems to be a misconception among hams that when using 450 ladder line, a 4:1 balun is the best thing to use. While that may be true in some cases, in many other cases, a 1:1 balun will serve better. It all depends on the feedpoint impedance of the feedline at the shack end, and

Re: [Elecraft] KAT100 with Ladder Line

2007-11-15 Thread Don Wilhelm
You are quite correct. My favorite tuner of all is a link coupled balanced tuner, and it is L B Cebik's favorite too - low loss and can be configured to match just about anything - series tuning for low impedances or parallel for higher impedances. I have built many over the years. No balun

Re: [Elecraft] Re: KAT100 with Ladder Line

2007-11-16 Thread Don Wilhelm
Peter, Antenna and transmission line behavior is a strange 'animal' that does not mesh with our normal thoughts of electron flow in wires. It is indeed a complex subject that must be considered in 4 dimensions to be fully analyzed, and our brains think in only 3 dimensions. How an electrom

Re: [Elecraft] Re: KAT100 with Ladder Line

2007-11-16 Thread Don Wilhelm
Yes, I fear that many hams do not realize how much loss is being introduced by their tuners. It has been stated that MFJ makes good tuners, but my experience with their MFJ-963D and the MFJ-971 tuners say otherwise - the inductor is mounted too close to the enclosure which reduces the inductor

Re: [Elecraft] Transmission line loss

2007-11-16 Thread Don Wilhelm
Mike, Take a look at the loss from 0.40 inch diameter 75 ohm coax that may be available free as cutoffs from your cable installing company - it is burial rated and will often outperform the 50 ohm coax when you do the loss calculations. You are correct that the matched line loss will vary wi

Re: [Elecraft] KPA-100 RFC 10 question

2007-11-17 Thread Don Wilhelm
Werner, The new T/R switch design eliminates RFC10. It was a source of trouble because it could cause a 40 meter parasitic oscillation. That problem was usually noticed when operating with a KAT100. Do not install RFC10 in the updated KPA100. 73, Don W3FPR Dr. Werner Furlan wrote: hello,

Re: [Elecraft] KAT100 with Ladder Line

2007-11-17 Thread Don Wilhelm
I have not seen it mentioned yet, but the best installation of open wire line will tension the conductors between 2 supports. That means fewer spacers are required because the tensioned wires do not sway as much in the wind. For my part, PVC spacers are easy to construct and inexpensive. 73,

Re: [Elecraft] [K2] KBT2 Battery charger/power supply recommendation?

2007-11-17 Thread Don Wilhelm
Dick, As an alternative, you can make a direct connection to the battery (put a fuse in for safety please) and use one of the SmartChargers to keep the battery topped off. Take a look at my website article at http://w3fpr.qrpradio.com to see how I did it. 73, Don W3FPR Dick Dievendorff wro

Re: [Elecraft] Installation of a KXB30 in KX-1 Part 2!!

2007-11-17 Thread Don Wilhelm
Kieth, I commonly use component leads that are lying around my workbench. Things are a bit easier if you use the longer ones clipped from capacitors, but most any will do the job. Yes, use solid wire rather than stranded so it will support the board. Since you powered the KX1 on with no sh

Re: [Elecraft] KSB2 sidetone?

2007-11-19 Thread Don Wilhelm
Chris, I cannot relate 'sidetone in the headset' with SSB operation. In CW, there is a sidetone presented to the headphones or speaker which follows the keying, but there is nothing of that sort for SSB. If you lost your CW sidetone while using the K2 memory, that is quite another matter.

Re: [Elecraft] [K2] Plantronics Gamecon 1 Headset

2007-11-19 Thread Don Wilhelm
Just my opinion here: For those who have the 'where-with-all' to build a proper adapter for these PC microphones and headsets, many of them will work just fine - some even great. Besides, they are inexpensive things to experiment with just to see if you can make it work for your use. But if th

Re: [Elecraft] SSB contesting

2007-11-19 Thread Don Wilhelm
Lyle, Since the K3 hardware design is pretty well fixed in place now, for my part I would think mixing them would be fine. Any muting of an input would have to be done outside the K3 if indeed muting is required. Of course, I believe the ideal would be to have each PTT input line make its o

Re: [Elecraft] XV144 problem - no LEDs light up

2007-11-19 Thread Don Wilhelm
John, Did you set up R10 properly? See page 28 of the new XV User's Manual for instructions. You may download the manual if you have an older one. (I am certain it is in the older manual too, just not certain where). 73, Don W3FPR I've just resurrected my XV144 after a year of none use.

Re: [Elecraft] DeoxIt and/or ProGold useage

2007-11-19 Thread Don Wilhelm
I did not really want to get into this discussion, but I now feel moved to make a few observations. First, I don't believe the use of DeoxIT /ProGold will hurt anything *if* used properly. I would not use DeoxIT on gold connectors or the ProGold on tin connectors - the effects are different.

Re: [Elecraft] hard case for k2?

2007-11-19 Thread Don Wilhelm
Oliver, The padding of the back seat is all you likely need for quick transport - the K2 is not as fragile as the cautions that many folks propose would suggest. If you want something that elephants (airline baggage handlers :-) ) can stomp on without harming it, I would believe the pelican

Re: [Elecraft] k2/100 with amp

2007-11-19 Thread Don Wilhelm
Ron, You don't!!! Depending on linear amplifier compression to control the driver output level is a sure way to introduce distortion into your transmitter path. Keep the drive level down to the point where the amplifier just peaks to max output or below that level and all will be well (i.e. t

Re: [Elecraft] K3 Toroids: Why some have uneven turns spacing (It's intentional!)

2007-11-19 Thread Don Wilhelm
Don, I have built several K2s, and I know for a fact that the toroids do not change due to vibrations due to portable/mobile operation. I expect the K3 to be similar. At least one of the K2s that I have built has seen service in mobile operation in an 18 wheeler for several years, and I don

[Elecraft] New K2 Quick Reference Guide

2007-11-21 Thread Don Wilhelm
A friend who bought a used K2 created a Reference Guide to help fqmiliarize himself with the K2 buttons and the menu functions. He has generously allowed me to post his work on my website. It can be found right now at www.qsl.net/w3fpr - scroll down on the opening page a bit and you will find i

Re: [Elecraft] K2: AGC Threshold Too Low?

2007-11-23 Thread Don Wilhelm
Sarah, Congratulations on getting your license and venturing to build your K2. The AGC Threshold high limit is directly proportional to the 8 volt regulator actual output - if you follow the circuit you will discover that that voltage is really the result of a 3 legged resistive voltage divid

Re: [Elecraft] I didn't realize what you meant (was RE: WARNING! WARNING! WAR...

2007-11-23 Thread Don Wilhelm
Al, AFAIK, you are correct - the large value resistor is primarily there to protect the person wearing the wrist strap. However, I do not like to do any electronic or electrical work on a directly grounded and conductive surface - period. IMHO, there is too much of a chance to create a shor

Re: [Elecraft] Tuning knob revisit (Gil WA5YKK)

2007-11-23 Thread Don Wilhelm
Gil, The FT-900 knob is no longer available. You can add an FT-900 (or ft100 or FT847) tire to your stock K2 knob and add the Elecraft finger dimple too. The stock K2 knob has adequate weight if the drag is adjusted properly, but the sharp edge is a problem for me - the rubber tire helps dr

Re: [Elecraft] KPA100 R 19 R20 question

2007-11-23 Thread Don Wilhelm
Werner, If they all look the same, they are all good. The old inductive resistors had a light-blue body, the new ones have a red-brown body color. I have mentioned many times that body color is not a good means of identifying components, but for KPA100 R19 and R20, it is good for now - if E

Re: [Elecraft] Frequency Shift

2007-11-24 Thread Don Wilhelm
Dave, A BFO shift of up to 20 Hz is to be expected. If you have 100 Hz shifts, then you need to run CAL PLL again - using Spectrogram if possible. Note that you should use a broadband noise source or band noise (with the preamp on) with no signals present. Attempting to set the BFOs with a

Re: [Elecraft] Frequency Shift

2007-11-24 Thread Don Wilhelm
Tom Hammond caught my 'too quick response' I should have typed CAL FIL below - not CAL PLL. Sorry all and thanks to Tom for noticing. 73, Don W3FPR Don Wilhelm wrote: Dave, A BFO shift of up to 20 Hz is to be expected. If you have 100 Hz shifts, then you need to run CAL PLL aga

Re: WARNING! WARNING! WARNING! (was [Elecraft] ESD recommendation)

2007-11-25 Thread Don Wilhelm
David, Having to study the National Electrical Code prior to building and wiring my house, I can talk a bit about the safety grounding for residential AC power in the US - All exposed metallic components of the electrical wiring system must be connected to the electrical safety ground. The

Re: [Elecraft] ESD Safety

2007-11-25 Thread Don Wilhelm
Jerry and all, There are a few soldering stations that have isolated tips (they also say they are ESD safe) that can be used when working on live circuits. The Solomon soldering station that I have is an isolated tip. 73, Don W3FPR Jeremiah McCarthy wrote: Until retirement in 1993, I worke

Re: [Elecraft] Ripple in K2 xtal filter?

2007-11-25 Thread Don Wilhelm
Stephen, There is a lot of ripple in the variable filter passband when it is set to a wide filter value. Even with the ripple, the filter is quite usable on SSB voice, but for data modes, it does have its shortcomings. That is one good reason that I set up the RTTY filter set for use on dat

Re: [Elecraft] Much OT - No "practical" solution

2007-11-25 Thread Don Wilhelm
Ron, On all of the modern 2 wire appliances that I have, there is no exposed metal - it is all plastic or otherwise insulated. There was an appliance designation that is termed "Double Insulated" that used to be in common use. Double Insulated devices depend on the fact that you cannot touch an

Re: [Elecraft] Feeding with 300 OHM Twin Lead in basement ceiling

2007-11-25 Thread Don Wilhelm
Norm, Keep the feedline away from conductors by 3 times the line spacing - more if you can. You may be able to find TV standoffs for 300 ohm line. An end fed Zepp antenna will work nicely if it is 1/2 wave long and the feedline is 1/4 wave (or any odd multiple). If those conditions are not

Re: [Elecraft] Re: K2 & ESD

2007-11-26 Thread Don Wilhelm
Bill, I believe folks are worrying too much about a 'true earth ground' when considering ESD - it is actually only necessary that everything at the workspace (including the worker) is at the same potential - it matters not whether that potential is at Mother Earth Ground potential or hundreds

Re: [Elecraft] Fwd: The results of your email commands

2007-11-26 Thread Don Wilhelm
Mark, If you had infinite readings on those that you marked 'XX', then they too are OK. Note the '>' symbol before the number - it means 'greater than', and infinity is greater than 100k ohms. The readings listed have to cover all meters and circumstances. An ohmmeter on a high resistance s

Re: [Elecraft] Poor Man's ESD Mat?

2007-11-26 Thread Don Wilhelm
Ahhh, come on Henry - Surely, you can spare $20 for an anti-static mat to protect your $1300+++ investment in the K3 kit! TigerDirect (www.tigerdirect.com) has their stock number ULT33122 priced at $19.99. I don't know if they are available in the local store, but a phone call might give you

Re: [Elecraft] KPA100 R 19 R20 question

2007-11-27 Thread Don Wilhelm
Werner, The KPA100 does not distinguish between CW and SSB - input RF is input RF and it operates in a linear curve with a gain of approximately 10 dB, so 10 watts in will produce 100 watts out and 2 watts in will produce 20 watts out and everything proportionally in between. How does your

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