Re: [Elecraft] K3 Voltage on TX

I gave up running my K3 through a RigRunner for just that reason. I put in a short lead directly to the battery bank APP junction strip and things got a lot better. They got even better with a N8XJK Boost Regulator between the K3 and the junction. (Tested with 100W into a dummy load.) 73

Re: [Elecraft] K3 Voltage on TX

It would be nice to have test point type jacks on the back of the K3 to test the voltage drop from the PS through the APP's entering the K3. This would check the accuracy of the K3 volt-meter as well. I don't remember what it looks like in the vicinity of the APP's. The next best thing we

Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt

Hi Ron, I bought the unit from a ham, who finds pleasure and has the equipment to calibrate. And he did it to the unit and the sensors. This is all documented and well done. So I could measure my wspr output of 500 uW were I reached the 1 Mio km per Watt goal. But I had the troubles described

[Elecraft] KSYN3A synthesizer question

I have an older K3 with a sub receiver that I am thinking of upgrading. This is a second radio that I use at my beach house. If I rarely use the sub receiver, can I just upgrade the main receiver board with one KSYN3A synthesizer or do I need to purchase two KSYN3A synthesizers? Irwin Darack

Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt

Silly me, I was just told, that I even have a newer version PMA3 http://www.foxdelta.com/products/pm3.htm It is sometimes a pain getting older. 73 de Hajo __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft

Re: [Elecraft] K3 Voltage on TX

Forgot to mention: the RR runs everything else that needs 14v. On Mon, Oct 26, 2015 at 5:08 PM, Jim Miller wrote: > I was having too much drop with RR as well. I switched to a 1ft line > directly to my Samlex 1235M which has been jacked to 14.4v no load. It only > moves a few

Re: [Elecraft] K3 Voltage on TX

You don't happen to have anything else in line between the power supply and the K3 do you? I've found those DC distribution panels sold by certain companies are contributors to significant voltage drop. Your statement " With the radio connected directly to the PS. I am now seeing 14.1 VDC

Re: [Elecraft] K3 Voltage on TX

I just checked my radio. Receive shows 13.7 volts. At 100 watts CW key down transmit it shows 13.3 volts. The current indicated on the power supply is 18 amps. Power leads are about 2 ft in length being #10 stranded with connectors crimped and soldered at both ends. Also a #10 AWG ground

Re: [Elecraft] K3 Popping noise in headphones??

Thanks Jim. I used the Kenwood TS-480 when the rig was in the shop, and the audio was better, fewer pops and hiss, and the Noise Reduction was noticeably better on the Kenwood 480. Jim W6AIM . -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim

Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt

Hajo: A power meter based on the AD8307, such as the PM2 uses, can be very accurate and sensitive but requires calibration. The AD3807 takes RF in and produces a dc output proportional to the logarithm of the input signal amplitude. I have a homebrew version based on a design by W7ZOI that

Re: [Elecraft] K3 Voltage on TX

Well my take.ANYTHING between the power source and radio has resistance, regardless of how small. Resistance with any amount of current equals voltage drop. Thus E = IR Where E is the voltage drop, I is the current and R is the resistance. I'm not sure what some of those thing are nor

[Elecraft] So: Which mini-keyboard to use with the PX3?

Hi all, I'm shopping for a very compact (10" or less in width) wireless keyboard to use with my PX3. Obviously it'll be no-frills, no numeric keypad, etc. The Logitech 360 works great but takes up too much space, IMHO. The PX3's keyboard feature has been in test for awhile. Can anyone

Re: [Elecraft] So: Which mini-keyboard to use with the PX3?

Wayne with my P3 I use a Flexible roll-up usb keyboard don't remember the brand off hand. Fred. N0AZZ Sent from my iPad > On Oct 26, 2015, at 7:25 PM, Wayne Burdick wrote: > > Hi all, > > I'm shopping for a very compact (10" or less in width) wireless keyboard to > use

Re: [Elecraft] Elecraft KAT1 AUTOMATIC ANTENNA TUNER

Don wrote: > When it has found a tuning solution, it will display the resulting SWR. > Tap any button to exit the TUNE process. It's worth noting that the K1 continues transmitting after the tuning is complete, until the TUNE process is manually exited. > ...if you have done a TUNE on all

Re: [Elecraft] K3 Voltage on TX

On Mon,10/26/2015 12:37 PM, Bob McGraw - K4TAX wrote: In fact, anything in line between the power supply and radio can contribute to this. Even fuses, switches, power connectors and such. Any connection that is loose or terminal that is loose will be a voltage drop point. They just add up.

Re: [Elecraft] K3 Voltage on TX

I was having too much drop with RR as well. I switched to a 1ft line directly to my Samlex 1235M which has been jacked to 14.4v no load. It only moves a few mV when loaded to 20A. IIRC, the cable is now AWG12. jim ab3cv __ Elecraft

Re: [Elecraft] KSYN3A synthesizer question

Unless you want to remove the sub receiver, you will need two new synths. 73 Bill AE6JV On 10/26/15 at 2:55 PM, idar...@gmail.com (KD3TB) wrote: > I have an older K3 with a sub receiver that I am thinking of upgrading. > This is a second radio that I use at my beach house. If I rarely use the

Re: [Elecraft] K3 Voltage on TX

Perhaps it's vanity, but I like running my rig off solar power and batteries. Since I also take the rig out in the field somewhat frequently, battery power avoids noisy generators. (Besides, I own the panels and batteries, but don't own a generator.) In any case, floating batteries requires a

Re: [Elecraft] K3 Voltage on TX

This discussion has got me confused. If a power supply fails, it is pretty easy to fault find. If you use the correct size cable for the length you require, then it WILL work. Discussions on APP and test points seem to me to be a little pedantic as apart from from a power supply failure I have

Re: [Elecraft] K3 Voltage on TX

If voltage is being checked via the K3 display, I believe there is a series diode before the internal metering that adds a 0.6V drop in TX?   73, Mike  AC5P On Monday, October 26, 2015 5:08 PM, Bill Frantz wrote: Perhaps it's vanity, but I like running my

Re: [Elecraft] K3 Voltage on TX

I am using the same SamLex supply with the K3s Elecraft power cord that came with the kit. At 100 Watts key down I can just see the voltmeter move maybe the width of the needle. The readout on the radio does not dim. Earl, K4KAY -Original Message- From: Elecraft

Re: [Elecraft] KSYN3A synthesizer question

You need two. The K3 cannot handle one of each in the same receiver. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KD3TB Sent: Monday, October 26, 2015 2:56 PM To: 'Elecraft Reflector' Subject: [Elecraft] KSYN3A synthesizer

Re: [Elecraft] K3 Voltage on TX

Dick, If the main interest is the drop in voltage, the 12V jack will work fine, no matter how many diodes are in series with it. So you get 10 volts during RX and 9 volts during TX, that is a 1 volt drop (OK, that is extreme, but hopefully makes the point). If you are instead looking for the

Re: [Elecraft] K3 Voltage on TX

Seems to me the display on VFO B is accurate enough for this purpose. Now to make sure of the accuracy along with voltage drop, measure the voltage at the power supply terminals. I would expect the voltage at the power supply terminals and the VFO B display in receive mode to be identical,

Re: [Elecraft] Issue Resolved K3 Voltage on TX

Thanks for all of the great advice. I have made several changes and here are the results. I wired my radio directly to the PS with AGW 10 probably about four feet. Thus removing the radio from the automatic battery switch over and then from the rigrunner. I now have the following voltages

[Elecraft] KAT500 - Utility not working - FINAL REPORT

Some may recall I had a issue with my KAT500 not connecting to the computer therefore not allowing me to use the KAT Utility. After checking com ports and ever purchasing a new KXUSB cable from Elecraft, I sent the unit off to the mother ship for a look-see.  Turns out we lost transistors Q1

Re: [Elecraft] So: Which mini-keyboard to use with the PX3?

I use a Bluetooth version with my Samsung Galaxy 5 phone, and I like it but I'm not a touch typist. It was only $13 on Amazon. I would call it lightweight; some might call it flimsy. 73, Jim N7US -Original Message- I used several different keyboards, including two from Logitech, but

Re: [Elecraft] So: Which mini-keyboard to use with the PX3?

On 10/26/2015 05:57 PM, Fred Smith wrote: Wayne with my P3 I use a Flexible roll-up usb keyboard don't remember the brand off hand. Fred. N0AZZ I also have a no-name flexible roll-up keyboard that works fine with the PX3 but I don't like it. I find I have to hit the key precisely in the

Re: [Elecraft] So: Which mini-keyboard to use with the PX3?

I used several different keyboards, including two from Logitech, but prefer the slim wireless from Anker. I'm a touch typist and don't need a numeric keypad for hamming, but I do want full size keys and full spacing. This is the best I've found:

Re: [Elecraft] So: Which mini-keyboard to use with the PX3?

Nice. Wayne On Oct 26, 2015, at 6:39 PM, Marc Veeneman wrote: > I used several different keyboards, including two from Logitech, but prefer > the slim wireless from Anker. I'm a touch typist and don't need a numeric > keypad for hamming, but I do want full size keys and

Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt

Hello, Thanks for your suggestions. It seems that the owners of the W2 use it for higher power settings than qrpp. So it is natural that nobody could answer my questions. So I will continue to use my Pm2 http://www.foxdelta.com/products/pm2.htm . But in a private discussion I was pointed to a

[Elecraft] K3 Voltage on TX

Folks, I am not sure if I have some sort of issues or not. My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? I do not believe this is a K3 issue, but I was wondering if others see that much drop before I dig into my 12VDC supply system. Thanks

Re: [Elecraft] K3 Voltage on TX

If the wire gauge is OK and the supply regulation is not at fault, give some attention to the connectors at each end of the cable, too. A drop of 2.8 Volts points to some sort of issue. 73, Phil W7OX On 10/26/15 9:02 AM, Jim Brown wrote: On Mon,10/26/2015 8:48 AM, Rich wrote: My K3 shows

Re: [Elecraft] K3 Voltage on TX

On Mon,10/26/2015 8:48 AM, Rich wrote: My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? It's not good. Two possible reasons -- poor regulation of the power supply and IR drop in the power cable. How long is the power cable between the K3 and power

Re: [Elecraft] K3 Voltage on TX

Rich, Yes, that is abnormal. Either your power supply is sagging or there is too much voltage drop in the power cable. To figure out which it is, measure the power supply voltage at its terminals during transmit. If it is staying "right up there" as it should, then the problem is in the

Re: [Elecraft] K3 Voltage on TX

That's still too much. Last time I measured my K3, the drop was 0.6 V on TX at 100W. Cartridge type [AGC] fuses and the holders are common culprits. I've replaced all of my fuses with the automotive fuses with the blade type contacts. They present a large contact area, are very tight, and

Re: [Elecraft] KRC2 rs232 to cpu not working

Jack, (and others on the list) Thanks for the pointers. I was unable to get the rs-232 to the computer working. I have not tried the Aux-bus to the K3 yet. I think I will contact elecraft service and see if I can send it back for a look-see by them. I can not tell what it has for

[Elecraft] Elecraft KAT1 AUTOMATIC ANTENNA TUNER

Built and operate the Elecraft K1 transceiver S/N 1112. It has always functioned perfectly in the past, QRPDXCC etc. I had not used the K1 for sometime and recently tried to fire it up. The unit includes the KAT1 ATU. Have been trying to follow the KAT1 operating Instruction Assembly and

Re: [Elecraft] K3 Voltage on TX

Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. Thanks for the

Re: [Elecraft] K3 Voltage on TX

That's way more drop than I experience with a 4S1P LiFePO4. Things to check: Length and gauge of wire [remember to double the length when calculating resistance, it's a round trip for the electrons]. Poor regulation in the power supply or depleted battery or battery at the end of useful

[Elecraft] Setting up K3s on Reverse Beacon

Are there easy step by step instructions on how to setup the K3s for running on Reverse Beacon? This will be my first introduction into digi modes. Thanks in advance, N1BBR -- bw...@fastmail.net __ Elecraft mailing list Home:

Re: [Elecraft] K3 Voltage on TX

Guess I'm more empirically than theoretically oriented, but my first act would be to touch and feel the cable and connectors after allowing the K3 to draw full current for a minute or two. Even 2 volts at 10 amps is 20 watts. That's enough to cause heating you should feel very quickly if it's

Re: [Elecraft] K3 Voltage on TX

Hi Rich: A couple of more things. First do the math. Assuming 20 amps of transmit current (that's my rig @100 watts output) with a 2 volt drop is 40 watts of lost energy (not my rig). That also happens to be the power rating of my soldering iron. To point, something is likely to be getting warm.

Re: [Elecraft] Which hand-held PTT switch? OT

Hi, That is routinely tested by ARRL. From the K3/100 review in January 2009 QST: Receive-transmit turnaround time (tx delay): SSB, 12 ms; FM, 9 ms. Unit is Not specified. suitable for use on AMTOR. So it's probably the user. AB2TC - Knut David Cutter wrote > Sorry for the thread drift, but,

Re: [Elecraft] Elecraft KAT1 AUTOMATIC ANTENNA TUNER

Dick, First make certain the ATU menu parameter is set to "tun". Then hold both the buttons in the upper right of the front panel together to initiate a TUNE. If the KAT1 already has a tuning solution in place, the process will go quickly and you may have to listen closely to hear relays