Re: [Elecraft] UPS Can Be a Noise Source

On 8/31/2017 3:26 PM, Jim McDonald wrote: I have an APC SmartUPS 700, which I bought many years ago from http://www.refurbups.com/. The manual says it's certified as Class B. Thanks Jim. I looked at a half-dozen APC UPS units advertised on that site about 2 weeks ago, and studied their specs

Re: [Elecraft] KX2, spy radio

Chas wrote: > SSB would have been the equivalent of encryption. Not even remotely so...SSB technology goes back decades before WWII. From Wikipedia: "The first U.S. patent for SSB modulation was applied for on December 1, 1915 by John Renshaw Carson. The U.S. Navy experimented with SSB over

Re: [Elecraft] KX2, spy radio

Here's a 1970-era small western world 'clandestine' set called the AVCO TAR-224A: http://www.cryptomuseum.com/spy/tar224/ It's about three times the bulk of the KX3, which is very small for the era and not too large even by today's standards. It puts out 20 watts A1 or A3 from 2 to 24 MHz,

Re: [Elecraft] UPS Can Be a Noise Source

On 8/31/2017 10:46 AM, Lynn W. Taylor, WB6UUT wrote: > What I did as part of my ISP was to remove the batteries from my UPSes > and replace 7 or 12Ah batteries with 100Ah batteries outside the case. > > That didn't get me to the 10 hours for maximum battery life, but it got > me to 8 hours.

[Elecraft] Submission

Sent from my iPhone __ 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 hosted by: http://www.qsl.net Please help

Re: [Elecraft] KX2, spy radio

That and counting change back... 73s and thanks, Dave NK7Z http://www.nk7z.net On 08/31/2017 07:56 PM, Charlie T, K3ICH wrote: SSB would have been the equivalent of encryption. Much like cursive writing today is secret code for us "old" people. Chas -Original Message- From:

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

What an "antenna tuner" does for you depends upon where you install it. There are two places where a low SWR is important: the load the finals in the rig "see" and the load the transmission line "sees". In most HAM installations the load the finals see is probably the most critical because if it

Re: [Elecraft] UPS Can Be a Noise Source

It's not a bad design goal if you can plan on only 1 or 2 outages per year, if that. Probably not too bad if the generator kicks in and you only abuse the batteries for a few minutes. My observation was that the big APC units charged at about half the discharge rate, so yeah, charging too

Re: [Elecraft] KX2, spy radio

SSB would have been the equivalent of encryption. Much like cursive writing today is secret code for us "old" people. Chas -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Stephen Peterson Sent: Thursday, August 31, 2017

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

An antenna current meter is pretty handy. I have a box of parts on my desk waiting to become one. At least when it shows zero current I'll be able to figure out pretty quickly that I forgot to connect the antenna, hehhe.. 73, Drew AF2Z On 08/31/17 18:09, Bill Frantz wrote: Sorry Jim. You

Re: [Elecraft] UPS Can Be a Noise Source

And my old, but still functioning with a new battery, APC Back-UPS Office, 500VA/325W UPS is also certified Class B. It has a "stepped approximation to a sine wave." 73, Jim N7US -Original Message- I forgot to add that the manual says it produces a sine wave. 73, Jim N7US

[Elecraft] UPS Can Be a Noise Source

I have a couple CyberPower uninterruptable power supplies in my shack and I have noticed no issues RX or TX. John KK9A Randy Farmer w8fn wrote: Thu Aug 31 20:09:52 EDT 2017 Hmmm. I had a Cyber Power 1500VA unit for a while on my station, but one day I transmitted on 12 meters and something

[Elecraft] KX2, spy radio

Imagine what the WWII resistance/spies would have given for a KX2! Fun and interesting to look at the equipment they were using. Steve, Ki7L __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

I snipped as much as I could to shorten this up. See below. I think the problem lies in part that early manuals taught antenna theory by starting out with a random wire and a simple L tuner as you say, at the antenna end of the transmission line. The purpose was to add inductance or

Re: [Elecraft] UPS Can Be a Noise Source

Hmmm. I had a Cyber Power 1500VA unit for a while on my station, but one day I transmitted on 12 meters and something inside the thing made a "pop". This was followed by a loud "crack" and the UPS expired then and there. I should note I have an extremely difficult RF environment on my tiny

Re: [Elecraft] K3 auto power reduction

T amp tells the K3 that it is there and ON, and the K3 changes the power.  This happens through that fat cable between the AUX ports.  It might be communications on the AUXBUS, or a dedicated signal.  I don't know if Elecraft makes that protocol public or not but it wouldn't hurt to ask them

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

One point to consider,  anytime one inserts a tuner in line at the transmitter, additional loss is also introduced. Additionally the SWR and related loss on the feedline is not reduced.   Some tuners, depending on load and frequency, can introduce as much as 25% power loss.   In many cases, a

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

Of all the terms and jargon in ham radio, "Standing Wave Ratio" has to be at least in the top 5 misunderstood ones, and maybe even top 3.  It didn't even really enter the ham vocabulary until the middle of the last century. Helping a ham trying to use an 11 m vertical-ish wire on 80 m, was

[Elecraft] New Product: Elecraft MH4 Microphone for the K2, K3, and K3S transceivers

Our new MH4 microphone is an enhanced replacement for the MH2, which is no longer available. The MH4 is available now on our order page. The MH4 can be used with the K2, K3, and K3S transceivers. It has the same sensitive, high-performance element as the MH2, and can be used with the same bias

Re: [Elecraft] UPS Can Be a Noise Source

I forgot to add that the manual says it produces a sine wave. 73, Jim N7US -Original Message- I have an APC SmartUPS 700, which I bought many years ago from http://www.refurbups.com/. The manual says it's certified as Class B. 73, Jim N7US -Original Message- On 8/31/2017

Re: [Elecraft] UPS Can Be a Noise Source

I have an APC SmartUPS 700, which I bought many years ago from http://www.refurbups.com/. The manual says it's certified as Class B. 73, Jim N7US -Original Message- On 8/31/2017 11:35 AM, Tox wrote: > I had a couple racks of APC > SmartUPS 2000 units with daisychained batteries to

[Elecraft] K3 auto power reduction

The KPA-500 (and probably the KPA-1500) will automatically reduce the power from the K3 to a predetermined level for proper drive and back to the level from the power control when the amp is off. Is there a way to invoke this magic with other amplifiers? 73, Roger N1RJ

Re: [Elecraft] K1 Discontinued

I started with a magnifier on an arm with a circular florescent lamp. I still use this device for anything which needs a bit of magnification including inspecting thru-hole boards and fixing knitting mistakes. I assembled a number of kits with SMT parts using this magnifier. I then got a

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

Sorry Jim. You are indeed correct about the feedline SWR. While there are other SWRs within the radio, they aren't of much interest. However, these radios do report a SWR in the UI, and that is what I was referring to. Since a naive user might look at that figure and say, "The SWR is 2. The

Re: [Elecraft] UPS Can Be a Noise Source

On 8/31/2017 11:35 AM, Tox wrote: I had a couple racks of APC SmartUPS 2000 units with daisychained batteries to give extended holdup to a couple of racks of telecom and server hw. No clue how RF noisy those units are, though. All of the APC units for which I've seen spec sheets are FCC Part

Re: [Elecraft] UPS Can Be a Noise Source

Good observations, Lynn.  A few more. First, I failed to observe that my 100Ah LiFePO4 battery runs ONLY my K3s. A big lead-acid from Costco runs other 12V gear and LED lighting. I do NOT try to provide UPS for power amps.  If I need them, I'll fire up the big 240V generator. Second, a local

Re: [Elecraft] Drone antenna launch Field portable! Changed topic.

I have been using a Blade CX2 RC helicopter to fly antenna wires up above tree tops for quite a few years now. I had added an LED nav light kit to the CX2 (red, green plus white landing light) and it runs off a simple on/off toggle on the transmitter. I installed a small servo on the belly of

Re: [Elecraft] Wattage Draw - K3S/100 vs KPA500/KAT500 - for UPS

Well maybe more shacks should have that capability. It is not expensive as here: https://www.amazon.com/P3-P4400-Electricity-Usage-Monitor/dp/B9MDBU/ref=sr_1_3?ie=UTF8=1504119777=8-3=power+meter Certainly not lab grade but good as even just a shack line monitor or bench tool. Another

Re: [Elecraft] K1 Discontinued

Coffee. In the early 1980's I was working on a new PA design for Phoenix Missile.  The original design used relatively narrow band klystons, and we needed more BW for, well, never mind.  So the new design used a three-stage IMPATT diode amplifier (injection-locked oscillator in reality). A

Re: [Elecraft] K1 Discontinued

LOL!!  Well, yeah, if you have all the parts out in a pile...  I have organizers I use so that I never have more out on the work surface than absolutely required.  And I don't even have allergies...  but I have had a sneeze scatter little parts before. __ Clay Autery, KY5G On

Re: [Elecraft] K3S and P3 for sale

I'm lowering the price to $3700 and will pay for shipping within the continental United States. Either email at jeremiah.pesc...@gmail.com or you can call/text to +1.614.388.8264 On Mon, Aug 21, 2017 at 9:14 AM Jeremiah Peschka wrote: > K3S and P3 for sale. Factory

Re: [Elecraft] UPS Can Be a Noise Source

That said, for my own use, I've got a 100Ah LFP from Blackwood Innovations for my ham hear; BioEnno has units all the way up to 300Ah for the deep-of-pocker. On Thu, Aug 31, 2017 at 11:35 AM, Tox wrote: > There are also UPSes meant for extended runtimes that are a little

Re: [Elecraft] UPS Can Be a Noise Source

There are also UPSes meant for extended runtimes that are a little less brutal on the batteries. One Upon a Time, I had a couple racks of APC SmartUPS 2000 units with daisychained batteries to give extended holdup to a couple of racks of telecom and server hw. No clue how RF noisy those units are,

Re: [Elecraft] K1 Discontinued

There is one infirmity that has not yet been mentioned that degrades one's ability to work with SMT devices ... allergies.  One sneeze and your project is over. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 8/31/2017 11:00 AM, James Bennett wrote: Guys - I’m about to hit the

Re: [Elecraft] K1 Discontinued

Luckily to have mine K1, bought this year. I intended to buy another one by the end of this year. Now I have to safely keep it as a jewel! https://www.flickr.com/photos/roney/34754819981/ Great little rig... 73 de PY1ZB On Thu, Aug 31, 2017 at 3:00 PM, James Bennett wrote: > Guys

Re: [Elecraft] K1 Discontinued

Guys - I’m about to hit the magic “70” mark and have been using +250 readers for quite a while. I’ve also been a stamp collector since age eight. Bad eyes and stamp collectinig don’t go together very well! The readers are fine for reading (du) but when it comes to really small, close-up

Re: [Elecraft] K1 Discontinued

They could call it the K1x, just to keep things confusing. wunder K6WRU Walter Underwood CM87wj http://observer.wunderwood.org/ (my blog) > On Aug 31, 2017, at 10:47 AM, Clay Autery wrote: > > Now THAT is intriguing to me... > > __ > Clay Autery, KY5G >

Re: [Elecraft] K1 Discontinued

Jim has a point here, of course.  I'm only 53, but my once "aviator-quality" vision now requires quite a bit of augmentation to do close work like SMT... But I plan to fight it EVERY step of the way  More magnification, more light, hell...  I'll use robot hands if I need to.  I like building!

Re: [Elecraft] K1 Discontinued

Now THAT is intriguing to me... __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 > But how small would the K1 be if made with SMT's and a few toroids. Ooohhh.. > > 73, Byron N6NUL > __ Elecraft mailing list

Re: [Elecraft] UPS Can Be a Noise Source

I'm going to add that nearly every UPS made is meant to bridge the time between when the power goes out, and the (automatic) generator starts. If you don't have a generator, the UPS signals the computer(s) so that they can shut down gracefully and turn the UPS off. The (typically AGM

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

Jim, I think that last point is often overloaded and bears repeating. With rigs like the KX2 or KX3, it's a common practice to connect the radiating element directly to the rig and put the other end as high as possible. In that case, 'SWR' is kinda meaningless, as the built in 'ATU' is actually

Re: [Elecraft] Is it my KX3/antenna or is it lousy band condx?

Mike, are you AB7RU? I was looking for resources near you. I don’t see any 10 m repeaters in eastern Washington or in Idaho, so that is out. You might listen for the daily 10-10 SSB nets. http://www.ten-ten.org/index.php/activity/daily-nets

Re: [Elecraft] Is it my KX3/antenna or is it lousy band condx?

Bob, Thank you very much for sharing all that. I like your dipole approach there, getting at least one end up in the air at the roof level of that condo. I could possibly do something like that, slingshot a line to the rooftop of this apt bldg somehow ... Maybe with some kind of batman grapple

[Elecraft] Elecraft K3 / KX3 with Rigblaster Advantage?

Hi all, I am reconfiguring a few radios and wanting to use an *existing* sound-card interface - So, anyone using the Rigblaster Advantage with their K3 w/serial port or KX3 (I have both)? (I did not see much at all on archives regarding use of the RB Advantage unit) * Thus, I am looking

Re: [Elecraft] Is it my KX3/antenna or is it lousy band condx?

I prefer to use the end fed wire in an inverted "L" configuration with the vertical leg running down a FG pole to the radio. Mel, K6KBE From: Barthold Lichtenbelt via Elecraft To: 'Walter Underwood' ; 'Reflector Elecraft'

Re: [Elecraft] Is it my KX3/antenna or is it lousy band condx?

Walter, This was a super informative writeup, thank you! I have one question for you. If you throw a 26-29 foot wire in a tree, but it is impractical to sit right at the end of the wire (too many branches in the way, or whatever) to operate, how would you extend it? For example, operate from

Re: [Elecraft] Drone antenna launch Field portable! Changed topic.

John, Just re-read your email, does the Phantom have an extra receiver slot? I have a Chroma that's a few years old which would have plenty of lift for a wire antenna, I need to check to see if it has an extra receiver slot. Rich - N5ZC On 8/31/2017 8:11 AM, Richard Thorne wrote: John, Do

Re: [Elecraft] Drone antenna launch Field portable! Changed topic.

John, Do use a separate receiver in order to activate the release or is there an extra slot on the drone receiver? I'm assuming your using a bind - n - fly drone.  If it's home brew with your own receiver then it probably has a spare slot that you can program a switch to? Rich - N5ZC On

[Elecraft] Drone antenna launch Field portable! Changed topic.

Here's what I use on my Phantom: https://www.hobbyzone.com/radio-related/servo-related/accessories/efla405.html?gclid=Cj0KCQjw557NBRC9ARIsAHJvVVPLFAokgDV7508h4v3RDV4nAUJpM3DmTknCizN8TLtUUmg0Xb9JSzIaAkHzEALw_wcB I'll make a video of it in antenna-installation action once we dry out a bit more

[Elecraft] FS K3

K3, #758 100 Watt Module ATU Automatic Antenna Tuner, provides 2nd Antenna input Second Receiver, Identical to Primary Receiver Digital I/O board, provides separate receive antenna input DVR, Digital Voice Recorder USB Upgraded boards. 2 5 pole 2.7 SSB Filters 2. matching 5 pole 500 MHZ CW

Re: [Elecraft] K1 Discontinued

Joseph, Contact sales about the KAT1. I have had official information that options will be available until the current supplies run out. 73, Don W3FPR On 8/30/2017 9:04 PM, Joseph M. Durnal wrote: I'm going to try and finish it sooner than later. Any chance that KAT1 is still available?

Re: [Elecraft] K1 Discontinued

Agree Skip... My son Jakub (15) is using his K1 mostly on receiving and learning CW and what is funny > time to time he is able to hear DX sigs better then on my K3... :) He is really proud to have his K1 because of that, hi. 73 - Petr, OK1RP - http://ok1rp.blogspot.com -- Sent from:

Re: [Elecraft] Dusting off the old K3 & Considering a KAT3A

Please don't perpetuate that myth, Bill.  Tuners do NOT reduce the SWR unless they're at the antenna end of a transmission line. The SWR exists on the transmission line, and it is determined ENTIRELY by the match between the transmission line and the load. What tuners at the rig do is get the