Re: [Elecraft] Current Flow on Copper Strips - a Question

What's more appropriate for coaxial building entry grounding management? This wide-strap, allegedly low inductance, approach... https://www.comm-omni.com/polyweb/images/pb.jpg ...or this more R56 approach... http://www.radio2way.net/MGB.jpg ? 73 John, kx4o On Fri, April 27, 2018 02:21,

Re: [Elecraft] Dish/Direct TV RFI?

You are, of course, absolutely correct Jim. Know that one model of the sat receiver uses an RF remote of some sort that many think is the culprit. Sadly the response from the, understandably RF clueless, sat help lines is kind of like going to a doctor with the plea "it hurts to do this" and

Re: [Elecraft] Dish/Direct TV RFI?

I have personally seem a 40m signal change the channels on our Direct TV setup. This is, unfortunately, a common problem... https://www.google.com/search?q=direct+tv+amateur+radio+changes+channels=direct+tv+amateur+radio+changes+channels John, kx4o On Wed, March 14, 2018 12:56, Reed wrote: >

Re: [Elecraft] Experiences using a portable HF loop

Small loop efficiency is relatively dismal, but as G8HQP once said concerning this topic... “That would depend on what you mean by 'efficient.' Probably not efficient in the usual engineering sense of power out vs. power in, but perhaps 'efficient' in the common meaning of being able to do the

[Elecraft] [KX3] Adding TX/RX "Relay" to KX3 Operation

All, Oh the things that come up for Field Day with just weeks left to prepare. Say someone commits to bringing a "mighty-fine" RX only electrically steerable antenna of some sort to field day 2016. Not wanting to be forever mechanically switching between TX and RX antennas... How would you

Re: [Elecraft] This will effect pilots and Hams throughout the Western US

Time to refit my Rose bag for a sextant and charts... and a fine watch? John, kx4o On Fri, June 10, 2016 20:03, Fred Townsend wrote: > > This Is Likely Why The Navy Is Causing A Massive And Mysterious GPS > Outage > In The Western US - The Drive > > >

Re: [Elecraft] Bonding KX3/PX3/KXPA100 - any examples?

I wish I had more pictures, but this one... http://www.hamradio.me/wp-content/uploads/2015/07/20150627-009.jpg ...from my FD article... http://www.hamradio.me/activities/kx4o-1b-battery-va-field-day-2015.html ...shows a strap of copper running behind all the gear shown roughly following

Re: [Elecraft] KX2 haiku (attempt )

The Haiku format: Contains seven five seven 'syllables' okay? __ 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

Re: [Elecraft] KX3 IQ Outputs - What to expect?

On Tue, March 17, 2015 05:16, Peter Lambert wrote: Thanks Peter. Good clues and I will have a look. Schematics printed and heading to work where we maintain an electronics lab that is an anti-static wonderland. I wonder, though, if there isn't some external forensics to try first. I mean if

Re: [Elecraft] KX3 - Power out vs. ALC bars

Thanks Walter. I think I understand now. What is the loop bandwidth of the power control loop? Thanks. John, kx4o On Mon, March 2, 2015 05:54, Walter Underwood wrote: No. Most likely the power varied as it was hunting for the right level. It probably started low then increased power slowly

Re: [Elecraft] KX3 - Adjustable RTY/PSK Idle Timeout

Hi Don. I'm aware of the IM feature and I do make use of it during casual use. However, I'm trying to make the most of the CAT sending capability of the KX3 and USB cable in a contesting/event situation (like Field Day) using N1MM, but without audio interfacing. For N1MM macros can one embed

[Elecraft] Toughness

Field Users, Which Elecraft products stand up best to knocks, bumps, etc. seen while fielding a station? Thanks. John, kx4o __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:

Re: [Elecraft] Toughness

Understood about the external features Ingo and good advice. My primary concern is over the internal soundness of products touted as portable. Thruhole and surface mount components are quite sturdy. Edge and header connectors are, well, good enough most times. My primary concern are those

Re: [Elecraft] Toughness

The ultimate goal is backpacking a 10W K2 on certain trips. Thanks to all for the inputs thus far. It sounds like things should be fine so long as common sense is applied to packing plus no drop kicking of the pack. John, kx4o On Mon, April 9, 2012 19:56, Mike Heitmann wrote: I can vouch for

Re: [Elecraft] Supply Voltage Range Elecraft K2 transceiver

Hi Rolf, Judging from the K2 schematic, there is no over-voltage protection, save for the SB530 (D12) reverse protection diode which, in normal hookup, won't do much until the bus hits ~30V; This is clearly meant for reverse protection only and really that's taken care of with D10. I guess D12

Re: [Elecraft] [KX3] LiPol battery pack and KX3 - voltage vs output

Being a switching circuit topology, boost circuits' efficiencies can well exceed 50% and often 80%. Some are in the nineties. You can think of them as a constant power circuit which will tend to consume more current as the voltage drops to deliver the same power to the load. What this means to

[Elecraft] OT Quality UHF Connectors

All, Does anyone know a good source of UHF connectors? If so, please respond off list with Make, Model and, if you have it, Vendor. Thanks. John, kx4o __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft

[Elecraft] K2 - Board Cleaning and Conformal Coating

All, Being in the electronics biz, we usually wash boards post assembly with the usual products and in accordance with IPC610, etc. Often, the boards are sprayed with conformal coating: Some to handle condensing environments and others just because someone wanted it. My operating locations will

Re: [Elecraft] Battery Charger Voltage High?

Keep in mind automotive power busses can and do have steady state voltages over 15V and even 16V when you include allowable ripple. Power busses are a terrible terrible place. Assuming the K3 designers' had in mind a car's electrical system, the choice of the BZW50-15 (in the QRP version) puts

Re: [Elecraft] XV432 Oscillates with Amp connected

All the suggestions about trying different cable lengths are good thoughts to help find the sweet spot of compatibility between the XV432 output circuit impedance and the Henry input impedance. Folks on the repeater-builder group talk about this very issue often; Of course in their case they are

[Elecraft] K2 and K3 Microphone Input Impedance

Wayne et al. I am surveying various rigs to see what their microphone input impedance values might be. I note the K3 schematics show just about every audio path including the microphone's path terminated in 10k ohms or so. In the KSB2 I see 1k ohm (or 180 ohms if /ATTEN is asserted). Was there

Re: [Elecraft] Overvoltage Protector Update

Nice circuit. Since this is meant to help protect the K3 from faulty power supplies, this begs the question of what abuse can the K3 (or K2) take from the power bus. As an automotive power bus is a terrible awful place, will the K3 design tolerate these typical values found on a vehicle power