[Elecraft] K1 boards open source?

Apologies in advance if this has been answered before. I can’t find it in the mailing list archives although surely it has come up already. I have recently realized that I “need” a 30 + 17 meter band filter board for my 40 + 20 K1. Obviously I have had 15+ years to make this realization, but

Re: [Elecraft] K4???

They are definitely working. I just ordered some K2 parts and they responded promptly. Doug, W0UHU > On 15May, 2020, at 1:11 PM, elecraft-requ...@mailman.qth.net wrote: > > Date: Fri, 15 May 2020 11:52:10 -0400 > From: Tom Doligalski mailto:w...@mac.com>> > To: Elecraft Reflector

[Elecraft] [K2] Serial number 00001

It would be great to see a picture of the circuit boards of that radio! Taking into account 20+ years of of ECOs and experimental mods, I am visualizing lots of jumpers and random capacitors… Doug, w0uhu. Message: 8 Date: Mon, 18 May 2020 12:43:36 -0700 From: Wayne Burdick

Re: [Elecraft] Mod: Improving Temperature Stability of K2

er capacitor. > Do not remove turns from L33. > > The BFO should come into range with those values. Check the high and > low frequencies before doing anything else. > > 73, > Don W3FPR > --- > On 10/2/2020 10:27 PM, Douglas Hagerman via Elecraft wrote: >> Hello K

Re: [Elecraft] [K1]CW Tune Led for Elecraft K2/K1

Fred KF9GX at FAR Circuits does have them, they're four bucks each plus 3.50 for shipping up to ten. (Possibly more outside the US.) Thanks Don for pointing this out! I believe it's the SMD version which is fun to assemble if you're a masochist! If someone gets around to ordering the parts

[Elecraft] Wayback machine K2 SSB filter roll-off mod question

I am trying to install the mod described in "Application Note Eliminating the Frequency Roll-off of the K2 SSB Filter.” Instructions are from March 2001, kit is new. Radio serial number 875 with SSB and 160 meters and antenna tuner and digital I/O options. The capacitor that is to be removed

Re: [Elecraft] Overlapping K2 upgrades?

elm wrote: > > Doug, > > If you have the most current upgrade kits, there is no overlap. OTOH if you > have older upgrade kits such as the BFO upgrade, there were changes. > > 73, > Don W3FPR > > On 9/14/2020 7:49 PM, Douglas Hagerman via Elecraft wrote: >>

[Elecraft] Mod: Improving Temperature Stability of K2

Hello K2 enthusiasts. I’m installing the “Improving Temperature Stability of the Elecraft K2 Transceiver 11/15/2002 Rev. H” mod into my old radio. It’s going smoothly except for confusion on my part about one of the capacitors. The original C174 is to be removed, it is marked “331” which is

[Elecraft] Overlapping K2 upgrades?

I am starting to apply the accumulated Elecraft upgrades to an early K2. Do any of them overlap? Is there a preferred sequence I should follow? Doug, W0UHU. __ Elecraft mailing list Home:

[Elecraft] K2 upgrade kit sequence

For anyone considering updating an old K2, a small point that may not be clear in the instructions is that the K2ATOBKT is sort of a "top level" kit that "controls" the other mod kits. So instead of installing the various kits in their calendar order of publishing (2001, 2002, 2003, etc.), the

[Elecraft] K6XX CW Indicator SMD Button LED Key installation

Can anyone explain how the SMD LED is to be mounted in the key cap for the K1 or K2 installation of the K6XX CW Indicator? I have an unbuilt kit (well, it is built now) and the key cap kit, but no instructions for how to install the LED. The key cap in the kit is drilled, and the LED appears to

[Elecraft] Sunspots!?!?

If, by some miracle, the sunspot count were to eventually jump up to a really high level, as was the case in around 2002, or even better in 1959, how would the various Elecraft receivers work? I’m specifically interested in the K1 and K2, but in general, is there a realistic problem with

[Elecraft] K2 PLL problem on upgrade

Ugh, I have my K2 upgrade changes made, but the PLL is not cooperating. This is after all the A to B changes, including specifically the PLL temperature compensation upgrade, which includes the new crystal X1 and the thermistor board replacing the resistor pack. The counter works fine, tested

Re: [Elecraft] K2 PLL problem on upgrade

> Ugh, I have my K2 upgrade changes made, but the PLL is not cooperating. This > is after all the A to B changes, including specifically the PLL temperature > compensation upgrade, which includes the new crystal X1 and the thermistor > board replacing the resistor pack. Went back to original

Re: [Elecraft] K2 upgrade kit question about L31

Orly? Next time I go to a party or bar I will try it! That will be in about 2099 at the current rate, though. In the meantime, what do I do? Doug, W0UHU. > On 22Nov, 2020, at 3:24 PM, Eric Norris wrote: > > I can confirm that Don's suggestion not only works, but is a great > ice-breaker at

[Elecraft] K2 upgrade kit question about L31

I’m in the E850138 upgrade kit right now, and the included inductor L31 seems to be a bit off. The value listed in the instructions is 12 uH, but the actual part is a blue ceramic inductor with stripes Brown-Brown-Black, which I read as 11 uH. Does this seem like a packing mistake, and I

Re: [Elecraft] Automatic lightning protection for radios

As I understand it, there should be a multi-level defense. Direct bonding to ground rods for any towers or support poles, plus the standard “automatic” grounding for the antenna wires using those things with the little metal chips in a tube, plus lots of ground rods, plus bonding of the

Re: [Elecraft] Elecraft Digest, Vol 201, Issue 23

What I’m suggesting is that AFTER you have your ground rods and perimeter ground and bonding to house ground and arrestors on the coax, you add a way to automatically disconnect the wires that are locally connected to the radio. Basically the same as disconnecting the connectors but without

Re: [Elecraft] K2 update path?

Hi Lou. The dates of the updates are on the documentation on the Elecraft website. But as Don mentioned, the AtoB kit is the best guide. I will tell you from recent experience (still in progress) that if you try to install the updates in time sequential order, it will get confusing. There are

Re: [Elecraft] K2.Unable to undertake VCO alignment.

I am suffering from a similar problem in the midst of applying the various upgrades. My BFO test numbers are good, 4917.13 kHz 4912.16 kHz 4.97 kHz range but when I try the VCO linearization process, I see 11090 flash and then get error 232. I have not checked the VFO against a reference

Re: [Elecraft] Sherwood Engineering: Receiver comparison update!

> > HERE! it is > > http://nc0b.com/table.html > > -73- FrankKG9H > kg9hfr...@gmail.com > Amusing to see KX3 still up there at the top of the list with the big boys. Doug, W0UHU. __ Elecraft

[Elecraft] K2 antenna connector confusion

I have slowly progressed to the point in the K2A2BKIT instructions step “Receiver Alignment.” The instructions are to inject a signal using either an antenna or a signal generator, but I am not hearing anything (other than noise) with my antenna connected to either the ANTENNA or the RCV ANT

[Elecraft] K2 parts shipment

FYI I just received an order for a K2 PLL kit that I placed in February. So things are moving! :-) Doug, W0UHU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm

Re: [Elecraft] Internal battery options for K1 & K2

I'm thinking 4 individual LiFePO4 cells in the K2, maybe 4 ea 32700 @ 6 Ah and 1.3 lb,? LiFePO4 being less fraught than LiIon.? Lou W7HV — Have you considered non-rechargeable AA Lithium batteries? Expensive, but they are available in every grocery store, last forever when not used, don’t

[Elecraft] KDSP2

I thought those were made of unobtanium. How is it compared to the regular audio filter? > > ...So I just got a KDSP2 DSP audio filter. Installed it in my K2. My > goodness, the menus are cryptic! > > - Jerry KF6VB >

[Elecraft] [K2] HI CUR ok?

I was out this morning trying some antenna configurations at the park, ten different setups, one one of them gave me a HI CUR error. It was on 20 meters with 10 watts and with the current limit set at 2.5 amps, left over from when I was working on the radio a few days ago. The SWR was 1.2 into

Re: [Elecraft] [K2] HI CUR ok?

lled. CAL CUR and HI CUR > relate only to the base K2, and not to the KPA100 - that is an indication > that a CAL CUR setting of 3.5 is not a problem. When I was repairing K2s, I > always set CAL CUR at 3.5 even if they were only a K2/10. > > 73, > Don W3FPR > >> On 9/2

[Elecraft] Shipping timeline (not K4)

FYI I ordered a battery kit for my K2 this morning, and the order was marked as shipped in only a few hours. So the system seems to be working as designed—at least for stuff that is in stock! Doug, W0UHU. __ Elecraft mailing list Home:

[Elecraft] K2 keying mod kit

Is there a packaged source for the required parts or do I get them from Mouser? Thanks. Doug, W0UHU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

[Elecraft] [K1] Reduce power when tuning K1?

In learning about my new-to-me K2, I find that there is discussion about automatic reduction of transmit power during tuning. Does that apply to the K1 as well? The K1 uses the same output transistor as the K2, but in a single-transistor class C configuration, compared to the K2 which uses two

Re: [Elecraft] Stripping & Tinning Enameled Wire - Fast, Easy, Reliably

How hot does the solder need to be to burn off magnet wire insulation? I have my soldering station set to 710 degrees, and that does not seem to be enough when I try the “blob on end of iron” method. Doug, W0UHU. > On 24Dec, 2021, at 8:47 AM, jerry wrote: > > On 2021-12-23 20:49, SteveL

Re: [Elecraft] Simulated stereo

> > The K3 (and I think the KX3 and K4) has a simulated stereo function > which allows you delay the audio to one channel slightly, which makes > signals seem to stand out from the noise. I believe that the radios > newer than the K3 also have the ability to create stereo separation by >

[Elecraft] [K2] Report on cheap power supply

Santa Claus brought me a cheap 14 volt wall wart style power supply. The purpose of this is to charge the K2 built-in battery. https://smile.amazon.com/PERFEIDY-Switching-Regulated-Transformer-Interchangeable/dp/B09DSCD62C/ref=sr_1_8?keywords=14+volt+wall+wart=1638756395=8-8

Re: [Elecraft] Elecraft Digest, Vol 212, Issue 9

My K2 PLL problems all originated in one inadequately tinned toroid wire. I have successfully built a fair number of kits with toroids, but it is pretty easy to end up with a lead that is not actually connected. Even though it looks good. So that is where I would start, check for continuity on

Re: [Elecraft] [K2] Cheap power supply for KBT2

Thanks for the comments and ideas for a K2 battery charger. This would simply be to charge the battery when away from home, so I don’t really care about RF noise. Doug, W0UHU. > Subject: Re: [Elecraft] [K2] Cheap power supply for KBT2 > > Hi Jim, > > Excellent article. I haven't checked if

[Elecraft] [K2] Cheap power supply for KBT2

Looking for ideas for a cheap 14 volt wall wart type power supply for recharging the KBT2 battery. Is there one available that has the right plug? I see lots of 12 volt and 14.4 volt chargers out there, but??? Thanks, Doug, W0UHU. __

Re: [Elecraft] K1 Noise Blanker KNB1 already-built and working

Hi Eric. Can you be more specific about the mod that improved the KNB1? I know there were a few changes early on, but mine is from about 2010 so should have had all the official mods in the initial build. Other than the “make the threshold higher than it already is” mod, is there something

[Elecraft] K2 alive again, yay!

Thanks to Don Wilhelm for his multiple suggestions on my problems with the K2 A to B kit. Turns out that my main error was insufficient stripping of the leads on the RFC 11 replacement toroid wire. Also I had some confusion deciphering the value of one of the resister packs. But in any case,

Re: [Elecraft] Changing K1 sidetone frequency

lter at 600 Hz. > You also need to adjust the Transmit Offset to match (adjust C13) - see the > manual for the procedure. > > 73, > Don W3FPR > >> On 7/23/2021 11:58 AM, Douglas Hagerman via Elecraft wrote: >> Could someone please remind me if you can change the K1 sidetone

[Elecraft] Changing K1 sidetone frequency

Could someone please remind me if you can change the K1 sidetone pitch without retuning the filters? Or is it like the K2? I can’t find mention of it in the K1 manual and can’t remember. Wanting to try 600 Hz. Thanks. Doug, W0UHU

Re: [Elecraft] Unassembled K2 Vs Assembled Marketability

I think a K2 would not be a great project for most 8 year olds. However, a simpler (and cheaper) kit like this one from MFJ should be within a beginner skill level, given some reasonable coaching. (Also a soldering station to avoid soldering iron frustration!)