Re: [Elecraft] Power Supplies

You can tell if the noise floor increase is due to increased gain by seeing if signals increase in strength along with the noise. As Don said, OCFs are prone to common mode issues. Perhaps the power supply is acting as a ground return for the 'common mode antenna'? A common mode choke on the

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

As I mentioned in an earlier post, the K3 / K3s "J3" connector leveraged by the K-Pod was originally intended to serve as a MPLAB ICD 2 (In-Circuit Debugger), http://wickedstone.com/KF5WBO/ICD-2%20Schematic.jpg http://wickedstone.com/KF5WBO/MPLAB%20ICD%202.jpg

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Clay, The K3 and K3S schematics are the same with respect to that connector. 73, Don W3FPR On 7/15/2016 11:35 PM, Clay Autery wrote: RR... I just cracked the K-pod manual and see that the cable is an RJ-25 cable... different pinouts from the RJ-12. (both 6P6C). I need the signals crossed

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

RR... I just cracked the K-pod manual and see that the cable is an RJ-25 cable... different pinouts from the RJ-12. (both 6P6C). I need the signals crossed with the pin numbers... or colors... No schematics for the K3s... I guess I'll try the K3 manual to see if it is at all illuminating...

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Don is correct but, actually, the connector is a 6PC6 male. The "RJ" numbers refer to the wiring AND connector. So it is NOT an RJ12 cable since only 5 conductors are used. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don

Re: [Elecraft] Sloping Terrain vs Feedline Losses

Agree with your points. I've said for a couple of decades now that one of the least expensive ways to improve a modest station (assuming one has at least a decent antenna) is to add an amplifier. Lots cheaper than a bigger tower and a bigger antenna. Also, to your point about arrival

Re: [Elecraft] Another KX3 vs K3S Query...

Awww..come on Merv.be nice..obviously reading comprehension may not be a requirement at MONTAC ??? -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Merv Schweigert Sent: Friday, July 15, 2016 9:44 PM To: elecraft@mailman.qth.net

[Elecraft] those end fed half waves

Well years ago I put up a 160 meter L and found it to be a noisy band so went to 75 found it could be matched with the K3s tuner but I wanted to run me amp built a matcher that did a good job with that 75 meter half wave that end fed half wave does a good job stateside and when 75 opens up

Re: [Elecraft] Another KX3 vs K3S Query...

Oops.. I missed that. It would never occur to me to buy a "built" unit if I could get it as a kit... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 7/15/2016 8:43 PM, Merv Schweigert wrote: > Now why would he do all that? He said he ordered a BUILT K3S-100 > >

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Sorry, I frankly have never looked at the jack on the bottom of my K3s closely. OK, RJ 12... still want to know which signals are on which pins... Guess I'll have to go do it myself this is about 187 on my TO DO list... ;) __ Clay Autery, KY5G MONTAC Enterprises (318)

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Not THAT into it... I don't own a K-pod... Was just going to review the pin out to see if a better cable design was possible... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 7/15/2016 6:55 PM, Lyle Johnson wrote: > It is a 6-pin connector and the wire at pin 1

Re: [Elecraft] [KX3] "GT" Command

If I remember correctly, AGC is set to off automatically in data modes. -- View this message in context: http://elecraft.365791.n2.nabble.com/KX3-GT-Command-tp7620201p7620206.html Sent from the Elecraft mailing list archive at Nabble.com.

Re: [Elecraft] Another KX3 vs K3S Query...

Now why would he do all that? He said he ordered a BUILT K3S-100 Holy cow!!! NICE!!! You should be all set... Start reading the Assembly manual... 3 times at least. Get a box(es) with at least 30 compartments to separate out all the hardware... Also... do a 100% inventory BEFORE you

Re: [Elecraft] Another KX3 vs K3S Query...

Holy cow!!! NICE!!! You should be all set... Start reading the Assembly manual... 3 times at least. Get a box(es) with at least 30 compartments to separate out all the hardware... Also... do a 100% inventory BEFORE you start... It's a pain, but it will save you a LOT of trouble and headaches

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Clay, Not possible - the connector is an RJ12. Pin 1 is not used and should be clipped at each end for best results. In other words, an Ethernet cable will not work. 73, Don W3FPR On 7/15/2016 7:47 PM, Clay Autery wrote: Can someone send me the RJ-45 pinout for the connection to the K-pod

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

It is a 6-pin connector and the wire at pin 1 should be cut at the radio end and to be safe cut it at both ends. Yes, people will use full 6-pin cables and may not observe any problems. Regardless of such anecdotal evidencee, cut the wire to pin 1. And of course, turn off the radio before

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Can someone send me the RJ-45 pinout for the connection to the K-pod (with and without the power mod)? I'd like to take a look at it I am somewhat confident that a standard CAT-5e cable, while functional is not the BEST solution... Thanks! __ Clay Autery, KY5G MONTAC

[Elecraft] [KX3] "GT" Command

When I had a K3, I used the GT command to set AGC off for data modes using GT000; I cannot seem to get that to work with the KX3. Is it not available? My reading of The Programmers Reference implies it *is* available. Thanks, Joel - W4JBB

[Elecraft] Subject: Re: Elecraft] KX2

Or just feed a grounded 50-foot tower with a 1/4 wave long stub alongside it space a few inches. 3/4 wave at 14-MHz is 53 feet and the 1/4 wave stub would be 17.7 foot. Hook your coax across between stub and tower and slide it up till you find a 50-ohm match. I've used small worm-gear hose

Re: [Elecraft] Sloping Terrain vs Feedline Losses

No. That was a specific statement. The general version would read "Most generalizations..." Alan used 'All' which is a specific. Ah the vagaries of language... Rick nhc On 7/15/2016 2:46 PM, Phil Wheeler wrote: Including that one? :-) Phil W7OX On 7/15/16 2:06 PM, Alan Bloom wrote: On

Re: [Elecraft] Power Supplies

Kevin, As I mentioned, I think this will depend on the Voltage Regulation level in the receiver. The Elecraft gear operates down low in voltage pretty well. I have experienced what you describe with other gear I have owned, but I have not compared if a difference is heard when going from a

Re: [Elecraft] Sloping Terrain vs Feedline Losses

Including that one? :-) Phil W7OX On 7/15/16 2:06 PM, Alan Bloom wrote: On 07/15/2016 11:02 AM, Jim Brown wrote: There are exceptions to every generalization, even when the generalization is good most of the time. "All generalizations are wrong." Alan N1AL

Re: [Elecraft] Power Supplies

Kev, Yes, common mode current can be a problem on receive as well as transmit. Transmit will cause RF-in-the-shack which is more obvious because you can be 'bitten' by RF. On receive, the common mode current will result in added receive noise due to pickup of noise on the transmission line.

Re: [Elecraft] Fwd: Bioenno's July Promotion

Hi Guy, (Interesting, and nice writing, BTW) I share your experience with batteries, only from the Bell side of things. We ran the major switching centers you described. We had individual cells that held 50 gallons of acid in each cell. A graph was kept for each cell. They lasted many

Re: [Elecraft] Sloping Terrain vs Feedline Losses

On 07/15/2016 11:02 AM, Jim Brown wrote: There are exceptions to every generalization, even when the generalization is good most of the time. "All generalizations are wrong." Alan N1AL __ Elecraft mailing list Home:

Re: [Elecraft] Power Supplies

Thanks Dick and Howard... The RS-50 is pretty new - maybe 6 months old and is in daily use. It wasn't until I had a rig I could easily run on batteries did I notice the noise. The RS-12 is quite old, maybe 15 years? It had been in storage about 10 years until trying it out today. I think I need

Re: [Elecraft] Sloping Terrain vs Feedline Losses

On Fri,7/15/2016 12:16 PM, brian wrote: It might be more interesting to discuss something like $/db to get to closer to optimum. Going from low dipole to a higher one might cost zero to a couple hundred and gain 3 db at about $10-$100/db. You will find exactly that analysis here.

Re: [Elecraft] Power Supplies

Hi Kevin, It is very possible that what you are experiencing is noise induced by common-mode currents from your antenna system. These currents take any path connected to the chassis of the rig including ANY AC mains connected power supply, regardless of whether it is a switcher or linear.

Re: [Elecraft] Sloping Terrain vs Feedline Losses

Guys, There is another issue here. That is : Just because ones antenna pattern is inferior to an optimum one by 5 or even 20 db at the best arrival angle, that doesn't mean there is zero energy at the most important arrival angles. It just means there is less. QRPers often work the same

Re: [Elecraft] Another KX3 vs K3S Query...

Again, thanks for all the help on and off list. My ship came in a bit faster than expected, so I've been able to order a built K3S-100 today, with ATU, SubRX, DigVoice, GenRX, TCXO/REF, 2.8/1.8/1.0/400/250 8-pole filters, K-Pod, mike and headset as well as a P3 with TXMON and SVGA. No 2m module -

Re: [Elecraft] Upgrading K3 --- order of installation

Yes, it can be tricky (I call it "fiddly"), especially the first time. If the connectors are aligned with the KRX3A pc board as seen from above in Fig 48 in the KRX3A manual, they are properly mated. 73, Ron AC7AC -Original Message- Removing the left side panel also makes it much

Re: [Elecraft] Sloping Terrain vs Feedline Losses

On Fri,7/15/2016 10:07 AM, Wes Stewart wrote: shows an example where IONCAP says there is no (usable) path between two stations, yet QSOs are made. Wes, There are exceptions to every generalization, even when the generalization is good most of the time. I recall some well known person who

[Elecraft] K3s/10: Max FP temp?

I am starting to use some digital modes and couldn't find any specs/guidelines on max power, duty cycle or FP temp. Running only 5W on JT65 (ie, 50% duty cycle) I see the FP temp get up to 43C after just one or two QSO's. Is an external fan recommended when using high duty cycle modes? Thanks,

Re: [Elecraft] Elecraft] KX2

For a 20M J-Pole look at N1LO's web page - http://www.qsl.net/n1lo/antenna.htm I have used his 10M collinear super J-Pole for years in my HOA-neighborhood back yard hanging from tall tree limbs. For the last 2 years it has been supported by a 55 ft fiberglass mast. It is my year-round go-to

Re: [Elecraft] Sloping Terrain vs Feedline Losses

I'll make a few closing comments, as I suspect the moderator will be cutting this off soon. When I used 45 degrees, that was a number out of a hat for illustrative purposes only. The point being that we hams tend to think that we can "force" the TOA to be lower, and lower is always "better."

Re: [Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

I suggest cutting the wire connected to pin 1 at the radio end. Can't hurt to cut it at both ends. Otherwise, there is a possibility of the radio doing things you prefer it to not do, probably precisely when you prefer that it not do those things... The function associated with pin 1 is not

Re: [Elecraft] KX2

OK, my "80-10 EFHW", which is how it's marketed, is really an "EFHWO8OBWGOOBT"? (End Fed On 80 But Works Great On Other Bands Too). :-) 73, Fred K6DGW TDY in SoCal on my Kindle Rick Robinson wrote: >I don't want to come off as a "A-Hole" but the use of efhw for any end

[Elecraft] [KPOD] Re: Now that the K-Pod is shipping, (longer RJ12 cable)

Bill So far, I'm experiencing normal operation of the K-Pod with a 14ft RJ12 6C straight through cable. Search for: "09600 RJ12 6P6C Straight Modular Cable" on Amazon. It was $4.99 as an add-on item to a larger order. At this point, I am not using the power modification on the K3, so I will

[Elecraft] Power Supplies

Hi... I have a KX3 and normally run it on batteries. I also have a Flex-6500 that runs on a big RS-50. Last night during the QRP Fox Hunt (only 1 pelt) I decided to shutdown the Flex and give the KX3 a shot. I powered up the Flex on its internal batteries and, while I had the headphones on,

[Elecraft] KX2

I don't want to come off as a "A-Hole" but the use of efhw for any end fed antenna is really getting out of hand. We as hams need to step up our game in regards to our communication skills of day to day speech. We, as hams,are regarded as communication specialists and this should go with our

Re: [Elecraft] KX2

Soun ds like a menu setting is in the wrong setting. Jim K9TF __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list

Re: [Elecraft] Elecraft] KX2

The terminology is very *important* for clarity in what you are talking about - especially in the field of antennas where many classic names have been modified so that there is no longer any meaning in the name - I pointed this out in reference to the number of antennas referred to as a Zepp.

Re: [Elecraft] Winlink & K3 settings

Tony, I use to have a K3, still enjoy this list. I run a P3 SCS modem on winlink I think the issue now could be band conditions. They are pretty bad http://www.bandconditions.com/ also, the propagation channel selection in Winlink Express is showing the same here in Florida. Good

Re: [Elecraft] Elecraft] KX2

Charlie, There is nothing wrong with making a true Zepp antenna for any band - we usually refer to them as a J-Pole that is popular at VHF/UHF. Use 300 ohm transmission line for the 1/4 wave matching section. See the works of Gary O'Neil N3GO on J-poles for discussion of the ideal

Re: [Elecraft] KX2

Here's another aricle, by W8JI, on feeding the EFHW: http://www.w8ji.com/end-fed_1_2_wave_matching_system_end%20feed.htm Bob NW8L On Thu, 14 Jul 2016, Don Wilhelm wrote: Dave, All that is theoretical does not translate directly to the physical world. Take a look at

Re: [Elecraft] Elecraft] KX2

There is a terminology issue, Charlie. The "EFHW" I use is this one: http://www.earchi.org/92011endfedfiles/Endfed6_40.pdf and is fed via a 9:1 UN-UN. Uses the coax shield as a counterpoise and seems to work well over the bands of interest -- depending on the length of wire used. An ATU is

[Elecraft] Winlink & K3 settings

Folks, I recently set up an SCS DR-7400 with my K3 on Winlink. I must have some settings that are slightly off, since my link up capabilities (HF) are not as reliable as I expected. So, I would appreciate feedback from Winlink users who are actively using their K3. Here is what I am interested

[Elecraft] FS: K3/100 & P3

Elecraft K3/100 with KAT3A, 2.7kHz filter, 700Hz filter (INRAD), 400Hz filter, PR6 preamp, KSYNTH3A upgrade. Elecraft P3 Panadapter with SVGA and TXMON (2KW sensor). High Serial numbers (K3:86xx, P3:25xx). No scratches, non-smoker. Package deal only, asking $3900 for both, plus shipping &

Re: [Elecraft] Elecraft] KX2

One other question I have concerns the length of these "EFHW" antennas that many are using. That is, are they REALLY End Fed Half-Waves? In other words, are they cut to be an electrical half wave-length or, are they simply a convenient length of wire, that is fed at one end? There could be a

[Elecraft] Sloping Terrain vs Feedline Losses

1) For the low bands, the overwhelming consideration is reduction in near field losses, both dielectric and I squared R (I2R) losses. 2) We need to remember that for non salt water situations vertically polarized RF is NOT reflected from dirt and rock. For all intents and purposes it is absorbed.

Re: [Elecraft] KX2

We need to distinguish between an end fed wire (EFW) and an end fed HALF WAVE wire (EFHW). If one has an actual half wave wire being called by the name EFHW, several things are true. One, the feed Z at the end is ridiculously high, with HV and painful burns in play even for 100W. Many (most?)

Re: [Elecraft] Fwd: Bioenno's July Promotion

Hi Wes, et al. I went looking through emails from you to find the reference, because I wanted to read it. I did not locate or recognize the reference in those emails. That aside... For conversation purposes I'll begin this assuming a flooded wet cell battery. That's because I have a pair of

Re: [Elecraft] KX2

Don's comments on the fact that a J-pole is merely a Zepp where the 1/2 wave radiator is vertical is something I discovered a few years ago. I have a dual-band J-pole on 10m/6m which works well. Note that the bottom end of the 1/4 wave matching stub is shorted. By attaching coax to the stub

Re: [Elecraft] Upgrading K3 --- order of installation

Removing the left side panel also makes it much easier to confirm that the connectors at the rear left of the KRX3 have been mated correctly. First-time assembly can be a little tricky, but becomes much easier after the connector pins have settled into their correct alignment. (The same is also

Re: [Elecraft] Elecraft] KX2

By "works great" I assume you mean it loads well, which is understandable since a horizontal wire 6 feet off the ground is going to look pretty lossy. Dave AB7E On 7/14/2016 10:17 PM, k6dgw wrote: 80. KAT3 will match it on 160, haven't tried to make any Q's there yet. Works great

Re: [Elecraft] [K2] AGC Time Constant

Al, The dynamic balance between the base and emitter of Q12 determine the AGC Fast/Slow response. The dynamic characteristics of Q12 as well as R2, C4, RP6 and C1 all come into play. Remember when doing the analysis that the voltage at /SLOW AGC is at 5 volts for fast AGC. When you consider