Re: [Elecraft] KAT500 Fault

Sounds like the amplifier key line is not connected thru the KAT500. The ATU must be able to break the amp key line during tuning and all other ATU relay transitions. Dick, K6KR Sent from my iPhone > On Oct 2, 2015, at 04:47, dave_w0ru wrote: > > Fred, > I am now trying

Re: [Elecraft] K3 mic cmp settings with kenwood mc-43s mic

On Thu,10/1/2015 9:51 PM, way235 wrote: I am using a Kenwood MC-43s and had the settings at MIC 13 and CMP 30 when I got the complaints. While talking on the air I changed to MIC 11 and CMP 3 and was told it sounds good now. You're looking at the wrong indicators. Don't look at the numerical

[Elecraft] K3 buglet

I have noticed this before, but it is so inconsistent that I hesitated to report it. Sometimes I notice a much higher SWR reported on my K3 than shown on an external meter when the KAT3 is bypassed. If I activate the KAT3, allow it to tune, and then go back to BYP, the readings agree. I realize

Re: [Elecraft] K3/P3 issue

In a recent message, Alan writes So you would expect it to read 3 dB lower (half the power), which is half an S unit. This is something that has always puzzled me, Alan. I agree that -3dB is half the power (in watts), but S-meter calibration is related to (micro)voltage.

[Elecraft] [K2] Band-Pass Filter Trimcap values

Don — I have just had a back-and-forth with Elecraft Parts about the same question. The K2 Manual, dated March 2012, lists for C44, C46, C32, and C34 trimmers p/n E540001, 5-30pF. However, Revision I-3 dated September 1, 2015, lists for C32 and C34 p/n E540002, 10-50 pF; and for C44 and C46,

Re: [Elecraft] SS30DV feedback

I just got mine with my K3S and haven’t even noticed it other than the power lamp being on. No issues or power drops at full power out. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jorge Diez - CX6VM Sent: Friday,

Re: [Elecraft] K3/P3 issue

3 dB? I've seen an S unit described as 6 dB -- double the *voltage*, or four times the power. Or in recent years some radios do 5 dB -- keep a linear string of LED's where over S9 is in 5 dB increments and below S9 is in 5 dB S units. Your assertion is the first time I have ever heard an S unit

[Elecraft] 2015 Oceania DX Contest - 3/4 October (PHONE) and 10/11 October (CW)

I entered the CW contest last year and enjoyed the challenge of working OC entrants with QRP power -- they added a QRP category in 2014 so, if time permits, get on and participate.72 de Jim R. K9JWV From: i...@oceaniadxcontest.com To: i...@oceaniadxcontest.com CC:

[Elecraft] [K2] Band-Pass Filter Trimcap values

During initial build I didn't have a signal generator and wasn't happy with the band-pass filter alignment for the 12m and 17m bands which use trimcaps. Revisiting the alignment with a newly acquired signal generator I found I couldn't get a correct adjustment and removed C46 - it's maximum

[Elecraft] SS30DV feedback

Hello I will appreciate feedback from users of the SS30DV power supply with a K3 Are you happy with it? With full power on the K3, the SS30DV is running comfortable? IS noisy? If you compare for example with a Samlex SEC-1235M, what do you think? Thanks very much 73, Jorge

Re: [Elecraft] [K2] Band-Pass Filter Trimcap values

Andrew, C21 and C23 are good with the ceramic capacitors with the red dot - use those supplied with your kit. C32 and C34 need approximately 25 pF to tune, and your current brown trimmers should do the job nicely. For C44 and C46 the capacity needed is approximately 10 pF (the brown body

Re: [Elecraft] SS30DV feedback

Hello Matt Thanks for the Info. I have two SEC-1235M and I hate the terminal screws, I think they are aluminum and I broke them if removing power cable too much times I prefer a PS with black and red connectors so I can connect any cable and don´t worry about connectors. Thanks! Jorge

Re: [Elecraft] SS30DV feedback

I have similar spur issues, approx 30khz apart, with the SS30DV on 40 & 80 meters as well. I do not get any noise from my Samlex 1235M using the same power cabling and same installation location. I will try the suggested toroid solution to see if I can get rid of the spurs. I do prefer the

Re: [Elecraft] SS30DV feedback

I didn't much like the Euro-style clamping terminals either. I built a short pigtail to 30A APP, and just leave the terminals alone. They're not robust enough for constant plugging in/out. The Samlex here is powered 100% of the time. Its output goes to a solar charge controller used to maintain

Re: [Elecraft] SS30DV feedback

Hi Jorge, I have both power supplies here - SS30DV and the Samlex SEC1235M. Except for the 1235 having voltage and current meters (the SS30 does not), there is little difference in performance. One thing that might affect your decision is that the 1235 has an (internally) adjustable output

Re: [Elecraft] SS30DV feedback

We had spurs all over the 80 meter band here on the K3S station that is being run as a remote, approximately 30 khz apart. The main station 50 ft away (but on different antennas spaced 100 feet) had no noise. At first we suspected the OCF dipole, then the networking boxes, then the laptop.

Re: [Elecraft] SS30DV feedback

I prefer a PS with black and red connectors so I can connect any cable and don´t worry about connectors. Quality *bolt* terminals will generally show less voltage drop in transmit than the wiping contacts like PowerPole connectors. That is particularly true when the PowerPoles are not

[Elecraft] K1 bandspread options revisited ...

K1 Fanatics, The K1 can apparently be set to have a band spread of 80 kHz or 150. Can this choice be easily reversed if I wanted to see (aka "experience") the difference in operation? Secondly, as the tuning rate increases with the wider band spread, can that be tamed by going to a

Re: [Elecraft] K3 mic cmp settings with kenwood mc-43s mic

First from your description, you may have RF getting into the transmit audio. This will sound like distortion and will get worse as the CMP value is increased. I use a Heil PR 781 mike which is a dynamic mike and has much lower output level than the Kenwood MC-43.I run with mike gain

Re: [Elecraft] SS30DV feedback

The SS30DV has +/- bolt terminals on the rear. The K3S is supplied with a power cable using ring lugs for these bolts on one end, and an APP connector for the K3S on the other. One other note, at the 100W operating level, we do not see any significant voltage drop across the APP conn. 73,

Re: [Elecraft] SS30DV feedback

Thanks all and Eric for the feedback 73, Jorge CX6VM/CW5W -Mensaje original- De: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] En nombre de Eric Swartz - WA6HHQ, Elecraft Enviado el: viernes, 02 de octubre de 2015 01:34 p.m. Para: Joe Subich, W4TV;

Re: [Elecraft] K1 bandspread options revisited ...

Doug, The bandspread of the K1 can be easily changed by changing the value of RF Board C2. The 68pF and the 120pF capacitors are provided with the kit, but if you want to customize the bandspread, you are free to use whatever value capacitor at C2 that you desire - 100pF will give you about

Re: [Elecraft] SS30DV feedback

On 10/2/2015 12:33 PM, Eric Swartz - WA6HHQ, Elecraft wrote: The SS30DV has +/- bolt terminals on the rear. The K3S is supplied with a power cable using ring lugs for these bolts on one end, and an APP connector for the K3S on the other. Very good! How about remote sensing terminals/connector

[Elecraft] K3S odd KAT3A behavior and question

I was playing with my K3S listening to code on 40m. I could clearly hear the signal but it wasn't loud. I spun the dial up a good bit and listened, nothing heard after about a minute so I pressed ATU Tune. The ATU clicked a few times and stopped. I spun back down where I was (somewhere around

[Elecraft] Upgraded or upgrading to KAT3A?

Looking for used KAT3. Anyone upgraded to KAT3A and selling their KAT3? Let me know what price you’re asking. Thanks Pete WK8S __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] SS30DV feedback

Joe, I am familiar with Kelvin sensing, otherwise known as 4 wire or remote sensing. Its advantages are probably outweighed by the risks of misconnecting and filtering needed for RF environments. With <4 feet of 10 ga wire I don't see significant voltage drops. I prefer KISS. 73 Fred, AE6QL

Re: [Elecraft] KAT500 Fault

I finally found out the answer. In checking the AuxBus cables, I found a cable connecting the K3 Key Out to the KPA500 PA Key. Removing this cable made the fault go away. Perhaps I had followed the Figure 3 on page 23 of the KPA500 manual at some point. Anyway there is a lot of cabling back there.

Re: [Elecraft] SS30DV feedback

Fred, I'm a fan of higher voltage -- perhaps 24 or 40 volts so that PA transistors can produce cleaner signals. Doing so reduces any IR drop on power supply wiring by a factor of 2 or 3. KISS. IC's are going to lower and lower voltages. Multiple circuits within boxes require a

Re: [Elecraft] SS30DV feedback

Fred et al: I would agree. When used with decent power cables, good connectors properly applied and overall length of 4 ft or so, remote sensing will likely bring more issues to the table than necessary. Additional wiring, additional connectors and filtering required to keep RF out and the

Re: [Elecraft] P3 Problem

Hi Paul, Thank you for the suggestion, but respectfully, I am not sure I want to take such a brut force fix for this, as I have many prams set, that are not at default. Does this reset everything in the radio to factory? I want to understand what is happening before I make changes... --

Re: [Elecraft] SS30DV feedback

To me the real solution is to incorporate an internal power supply. I agree that higher PA voltages will produce cleaner transmitters. Therefore multiple voltages, no problem, minimized ground loop issues, reduce number of cables. Only one box to transport as opposed to two. No extra cables

Re: [Elecraft] SS30DV feedback OT

Brain yes I recall tubes and the multiple power supply requirements. I even designed to a few. I also remember how rough it was to do mobile power supplies where the HV came from either vibrators or dynamotors. Then it was transistors and everything went to 13.85V. But transistor output tanks

[Elecraft] firmware suggestion: display receive CW speed

I try to send at around 18 wpm because I am reasonably confident copying at that speed. I am finding that many who are sending CW do not slow down, but that's another story. I use the decode on my KX3 to help my lack of perfect copying, trying to copy myself and using that to not annoy the other

Re: [Elecraft] KAT500 Fault

Right! You want only ONE key line. Note that in Figure 3 (pg 13) the KPAK3AUX cable contains a key line inside of it. Figure 4 (page 14) show an external key line cable between the K3 and KPA500 so you can break into it to control some external gear such as a Stepp-IR antenna controller, but also

Re: [Elecraft] SS30DV feedback

We're hitting the posting limit on this one. Let's wind it down in the next 3-4 posts at most. Then thread closed for now. Eric /elecraft.com/ On 10/2/2015 4:32 PM, Joe Subich, W4TV wrote: Doing so reduces any IR drop on power supply wiring by a factor of 2 or 3. Higher voltage - 24 or 40

Re: [Elecraft] SS30DV feedback

Doing so reduces any IR drop on power supply wiring by a factor of 2 or 3. Higher voltage - 24 or 40 V results in decreasing the voltage drop by a factor or 4 or 9. The voltage drop is a function of current *squared*. 24 or 48 volt finals certainly produce much cleaner signals as the active

Re: [Elecraft] SS30DV feedback

As I run my K3 from batteries at home, and am about to run in from batteries in Sierra county for the California QSO party -- no generators permitted where we are. I need battery power for my normal operations. If higher voltages are needed to clean up the amp, how about a DC to DC converter.

Re: [Elecraft] K3S odd KAT3A behavior and question

If I understand this correctly. It seems you set / tuned the ATU for a higher frequency, being the 2nd frequency where you listened, then moved back down band with out retuning. It would seem then the ATU would be set for some frequency other than the one you were receiving. Yes, going to

Re: [Elecraft] K3S odd KAT3A behavior and question

I only tuned enough to not be on top of the station. On October 2, 2015 10:40:28 PM EDT, Bob McGraw - K4TAX wrote: >If I understand this correctly. It seems you set / tuned the ATU for >a >higher frequency, being the 2nd frequency where you listened, then >moved >back

Re: [Elecraft] K3S odd KAT3A behavior and question

I tried this a couple of times with my K3S. Didn't notice any difference between the tuner active and tuner bypassed. Tuner insertion loss is in the order of 1.0 dB or less when matched, depending on which side of 50 ohms it is required to match. Very low Z matches tend to show a bit more

[Elecraft] Calling all K1 Mobiles

Any other folks out there crazy enough to run QRP mobile with their K1s? Looking for skeds with you and or competitors in a K1 mobile QRP challenge within this year's CW Sweepstakes. (No I don't run CW SS while driving, not that crazy). But I did run up about 75 sections and 150 QSOs on 40