Re: [Elecraft] Frequency display on P3?

The P3 has a menu entry to calibrate its frequency MENU:Ref Cal The calibration prodedure is on page 37 of the manual. I like to use an AM broadcast station (preferably near the top of the band) for calibration because these frequencies are highly accurate and AM mode puts the carrier right at

Re: [Elecraft] About my capacitor failure (etc.) issue:

I've always put a bit of heat sink compound on the rectifier unit before mounting it to the bottom plate.    I've found several power supplies where the bridge rectifier assembly failed and upon removal, there was no heat sink compound.   Add a new bridge assembly and some heat sink compound

Re: [Elecraft] About my capacitor failure (etc.) issue:

I can add perhaps another data point on the rectifier matter. Years back my employer, one of the largest ground to air radio manufacturers was having failures with their mainstay transmitter, a 50w carrier AM unit. It had a large toroidal  transformer and a packaged rectifier. The rectifier

Re: [Elecraft] KX3 with older Heil headset

Thanks for this tip. I knew there was a PTT input somewhere else on the radio besides the rings on the mic jack. My prev posts were from memory, however I sold my KX3 when the K3S was announced. Sent from my iPhone ...nr4c. bill > On Apr 24, 2020, at 10:10 PM, rich hurd WC3T wrote: > >  >

Re: [Elecraft] KX3 with older Heil headset

From http://elecraft.365791.n2.nabble.com/KX3-using-CW-key-as-PTT-switch-for-voice-td7564382.html I do this with a standard switch and a 2.5mm jack and a CM500 headset. Works FB. *You can use the tip contact of the ACC2 jack as a PTT input. Set MENU:ACC2 IO to "LO=PTT". You can plug your

Re: [Elecraft] KX3 with older Heil headset

Oops, one more thing. You’ll need lots of mic gain. Sent from my iPhone ...nr4c. bill > On Apr 24, 2020, at 8:29 PM, Bert wrote: > > Hi all, > > I want to use an older Heil headset, with an HC-4 element, with my KX3. > > Despite having tried different settings for the microphone, I

Re: [Elecraft] KX3 with older Heil headset

Before plugging in the mic from Menu set mic buttons to OFF. See the manual about this. Also be sure Bias is OFF. You will need to tap the Transmit button to speak and again to stop. Or use VOX, see manual to set this up. Go have fun! Sent from my iPhone ...nr4c. bill > On Apr 24,

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

Yes, '96 was a quiet year alright. On Fri, Apr 24, 2020 at 6:22 PM Dale Boresz wrote: > I have a stack of QST magazines from 1996 resting on top of my Astron > VS-35M. No transformer hum at all! > > Have not tried magazines from any other years, so YMMV... > > 73, > Dale - WA8SRA > > On Fri,

Re: [Elecraft] Frequency display on P3?

It sounds like you need to do the frequency calibration as documented on page 39 of the manual : https://ftp.elecraft.com/P3/Manuals%20Downloads/E740152%20P3%20Owner's%20man%20Rev%20H1.pdf Max NG7M On

[Elecraft] Frequency display on P3?

Here's what I'm sure is a beginner question. If I feed an accurate signal from a waveform generator into my K3S, on the P3 it appears right about 120 Hz higher than the actual frequency. This seems to be independent of the mode the K3S is in. What causes that? I noticed this when I had my

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

What a fascinating story! Thank you for sharing. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 4/24/20 4:35 PM, donov...@starpower.net wrote: In 1969 -- right out of college...

Re: [Elecraft] K3S Poor CW reported

My mistake. For mentions of KPA100 please read KPA3 100 watt amplifier! On Fri, Apr 24, 2020 at 19:35 Chuck Chandler wrote: > While I wait for my Winkeyer to be delivered I’m doing more testing, as I > can. We are moving in about a month and much of my stuff is packed > already. Some of the

[Elecraft] K3S Poor CW reported

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[Elecraft] KX3 with older Heil headset

Hi all, I want to use an older Heil headset, with an HC-4 element, with my KX3. Despite having tried different settings for the microphone, I can't make it work. Your ideas and suggestions would be much appreciated. Thanks! Bert VE3NR

Re: [Elecraft] K4 S-meter characteristics

The International Amateur Radio Union (IARU) Region 1 agreed on a technical recommendation for S Meter calibration for HF and VHF/UHF transceivers in 1981. Why go back to 1947? Brian Denley KB1VBF Sent from my iPad > On Apr 24, 2020, at 6:30 PM, Charlie T wrote: > > S-meters should be

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

In 1969 -- right out of college and in my first EE job, I was tasked to evaluate the technical performance of Sylvania's new R-1414 receiver that was designed and manufactured to be the replacement for thousands of R-390 and R-390A receivers then very widely used by the U.S. military. It

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

I have a stack of QST magazines from 1996 resting on top of my Astron VS-35M. No transformer hum at all! Have not tried magazines from any other years, so YMMV... 73, Dale - WA8SRA On Fri, Apr 24, 2020 at 4:09 PM Nate Bargmann wrote: > * On 2020 24 Apr 11:50 -0500, inventor61 . wrote: > > If

Re: [Elecraft] K3/K3S receiver and high-precision frequencydetermination?

It's a good thing I didn't carry through on my plan to operate the K3 with a paper in the place of the top cover! That was a close call. Seriously, don't *all* DDSs/PLLs/synthesizers/SDRs (and, thus, all modern transceivers) tune in steps? How is the tuning step related to the stability of an

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

On 4/24/2020 2:15 PM, Keith N6JPA wrote: > You should purchase an Astron Switching power supply. They are well > made and filtered properly. I use a SS-25M that has a fan that runs at > times, but it is not too loud. I use a SS-50M and "not too loud" is a matter of judgment. It is located on

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

With the TXO on the order of one every few minutes, without on the order two a minute or so. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 4/24/20 2:15 PM, donov...@starpower.net

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

You should purchase an Astron Switching power supply. They are well made and filtered properly. I use a SS-25M that has a fan that runs at times, but it is not too loud. On 4/24/2020 9:48 AM, inventor61 . wrote: I have a CAD design for a replacement wooden top for the RS-35, -35M, and

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

Each of these frequency jumps causes phase discontinuity that is likely to cause bit errors in during PSK modulation and demodulation. How often do they occur? 73 Frank W3LPL - Original Message - From: "Dave Cole" To: elecraft@mailman.qth.net Sent: Friday, April 24, 2020

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

Thanks for the explanation, I have always wondered why... I'm good with low phase noise, Low phase noise means less splatter from radios! All the folks close to me have purchased K3s, so even though they are close, it is not too bad. I had a friend that lived 700 feet from me, and had a

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

Actually, I have had MUCH more success in isolating the transformer mechanically from the chassis with the aforementioned Sorbathane. https://www.sorbothane.com/Data/Sites/31/pdfs/product-guides/Sorbothane-SPG.pdf < catalog of standard products. I use isolation studs they have metal

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

* On 2020 24 Apr 11:50 -0500, inventor61 . wrote: > If someone has a better idea than mine for making these, I am all ears. No better idea. I've read in times past of someone sandwiching some compressible material between the transformer and the supply top cover to quell or reduce the hum. I

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

Dave, Thanks, that may have been the thread I was remembering. While searching old messages, I also came across a post from Ed Cole KL7UW from June 2018 in which he stated that, even if an external reference is connected, the K3 frequency "is established by the [internal] TCXO and the

Re: [Elecraft] About my capacitor failure (etc.) issue:

Another possibility is that is what they had on hand Sent from my iPhone > On Apr 24, 2020, at 3:13 PM, Ray Albers wrote: > > This thread started as my description of the failure of my Astron RS-20A > power supply, caused by a bad electrolytic capacitor on the regulator > circuit board.

Re: [Elecraft] About my capacitor failure (etc.) issue:

Ray is correct. A study of the schematics for Astron linear supplies makes it clear that nothing in the circuitry is referenced to the chassis.The vast majority of PSUs are built so that V- can be bonded or not. V- is NOT ground, it is V-. And in our systems, it should NOT be bonded in the

Re: [Elecraft] K3/K3S receiver and high-precision frequency determination?

Hi, That was me... I used to use my Icom 756 Pro, to watch the Doppler on changes in the ionosphere, and on Meteors. The K3 uses steps to correct frequency, while the Icom did not. Analog vs. Digital corrections. Accuracy is not an issue, it is the steps... They destroy the continuity

Re: [Elecraft] About my capacitor failure (etc.) issue:

No!  That is the CORRECT thing to do; all grounds should equal ground.  You should reconnect that to the chassis ground, it is not a design flaw. Rick NK7I On 4/24/2020 12:11 PM, Ray Albers wrote: Finally, I'll mention that, like my old RS-20A, I found the negative terminal bonded to the

Re: [Elecraft] About my capacitor failure (etc.) issue:

This thread started as my description of the failure of my Astron RS-20A power supply, caused by a bad electrolytic capacitor on the regulator circuit board. Several hams posted advice that a 20Amp supply was really too small for a K3/100, especially if running full power. This led me to order an

Re: [Elecraft] K3/K3S receiver and high-precision frequencydetermination?

I don't recall that discussion you're talking about, but I can say the K3(s) has nowhere near that stability or resolution. (At least mine doesn't)  I don't know why Elecraft would design intentional instability into the radio. During a recent thread about the TCXO option, I did some

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

On 4/24/2020 8:17 AM, Robert Sands wrote: My Astron hums loudly only when the fax machine runs. Otherwise silent. ?interaction puzzling. This strongly suggests one or more mis-wired outlets in your home. Things like phase (hot) and neutral reversal, neutral and ground reversal, or an

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

I just got the PS back together and online again. I was astounded to discover that the transformer bolts were actually just shy of hand tight. I tightened them up and found that that quieted the thing down a lot. Not completely, but to a very large extent. The bolts holding the transformer to

Re: [Elecraft] K4/0

Mark: > On Apr 24, 2020, at 10:13 AM, Mark Musick wrote: > > Steve, > I don't have a link, but if you watch the video from Dayton last year you > will see Eric demonstrating the K4 using an Ipad. No need for a K4/0. True. But it does come down to operator preference. Flex’s product line was

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

My 50 Amp Astron had a piece of cork material glued between the front of the case and the transformer.  It started humming one day when the glue dried out and the cork fell.  I glued it back in place and all is well. I had a 70 Amp do the same thing. Maybe try a little piece of some similar

[Elecraft] WTB - K3 or K3S internal tuner

Looking for an internal tuner for K3 or K3S.  Had intended to buy one but waited too long. If you have one you would like to sell please let me know. wm3m73 at gmail dot com   Thank you  73  Emory  WM3M __ Elecraft mailing list Home:

[Elecraft] K3/K3S receiver and high-precision frequency determination?

Sometime (probably last year) I remember seeing a discussion of why the K3/K3S receiver isn't suitable to do high-precision frequency measurement tests at the level of hundredths of a Hertz. As I vaguely recall, the receiver is designed so that its frequency actually varies a bit

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

Has anyone tried using something like Dynamat (used to damp vibrations in cars). To keep the case from resonating? On Fri, Apr 24, 2020 at 9:17 AM Fernando Sindeaux via Elecraft < elecraft@mailman.qth.net> wrote: > I have an Astron RS-35A, and also hums, not too loud, but if the Shack is > in

[Elecraft] OT: Astron RS-35M Transformer Hum

I have a CAD design for a replacement wooden top for the RS-35, -35M, and VS-35M Astron supplies. This top cover looks exactly like the factory steel cover, uses the same mounting holes, and even has an exact duplicate of the vent slots. The material that worked out best was a HDF board. It can

Re: [Elecraft] K4/0

Here is the link of the video which demonstrates the remote features (another K4 or a tablet) management (it wasn't an iPad and wasn't defined in the video). https://www.youtube.com/watch?v=_m2xXjeqJYM Rick NK7I On 4/24/2020 9:30 AM, Buck wrote: As I recall, it was an iPad running a Windows

Re: [Elecraft] K4/0

As I recall, it was an iPad running a Windows emulation. That's too much for my feeble brain to comprehend. Buck, k4ia Honor Roll 8BDXCC EasyWayHamBooks.com On 4/24/2020 12:25 PM, Grant Youngman wrote: I believe it was a Windows tablet. My recollection is that the message was that iPad

Re: [Elecraft] K4 S-meter characteristics

Don’t forget “contest” mode, where the meter reads S-9 for all signals :-) Grant NQ5T > On Apr 24, 2020, at 9:42 AM, Charlie T wrote: > > S-meters should be calibrated with 9 signal levels: > > *Faint - Signal barely perceptible > *Very weak signals > *Weak signals > *Fair signals >

Re: [Elecraft] K4/0

I believe it was a Windows tablet. My recollection is that the message was that iPad support would come later. There may have been some progress, but I haven’t seen anything new officially from Elecraft. Might have missed it though. I’m personally hopeful that there will be a fully

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

I have an Astron RS-35A, and also hums, not too loud, but if the Shack is in silence, I can hear it, low but can be heard. 73 to all, Fernando, PY1BL Sent from my iPhone > On Apr 24, 2020, at 12:17 PM, Robert Sands wrote: > > My Astron hums loudly only when the fax machine runs. Otherwise

Re: [Elecraft] K4/0

It was a tablet, I’m not sure it was an IPad Ray W8LYJ Sent from my iPad > On Apr 24, 2020, at 09:15, Mark Musick wrote: > > Steve, > I don't have a link, but if you watch the video from Dayton last year you > will see Eric demonstrating the K4 using an Ipad. No need for a K4/0. You'll > be

Re: [Elecraft] Elecraft K3s, etc. bonding

Interesting statement. How did you determine this? I brought home from work my professional service monitor and checked my K3 (SN-4340) s-meter. Except from S0-S1 all other steps were exactly 6-dB. S9 = -73 dBm as advertised. I didn't bother much measuring above S9 so cannot comment on

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

My laser printer has the same effect. -de John NI0K Robert Sands wrote on 4/24/2020 10:17 AM: My Astron hums loudly only when the fax machine runs. Otherwise silent. ?interaction puzzling. On Fri, Apr 24, 2020, 7:35 AM David Bunte wrote: David - I have an RS-35M, that sits on a shelf

Re: [Elecraft] K4 S-meter characteristics

S-meters should be calibrated with 9 signal levels: *Faint - Signal barely perceptible *Very weak signals *Weak signals *Fair signals *Fairly good signals *Good signals *Moderately strong signals *Strong signals *Extremely strong signals (Reprinted from the 1947 ARRL Handbook, page 466 "RST

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

My Astron hums loudly only when the fax machine runs. Otherwise silent. ?interaction puzzling. On Fri, Apr 24, 2020, 7:35 AM David Bunte wrote: > David - > > I have an RS-35M, that sits on a shelf under my operating desk. I leave it > on 24/7, and never gave any thought to acoustic hum from it.

Re: [Elecraft] K4/0

Steve, I don't have a link, but if you watch the video from Dayton last year you will see Eric demonstrating the K4 using an Ipad. No need for a K4/0. You'll be able to remote to it via a tablet, PC and I would expect an app to remote via a smartphone. 73, Mark, WB9CIF -Original

Re: [Elecraft] K4 S-meter characteristics

It is very true that - in a contest situation - we aren’t often concerned with measuring signal levels. No argument. And, if contesting, DXing and rag chewing are all you use your K3 / K4 for, then I understand why you aren’t interested in the additional bells & whistles that are being

Re: [Elecraft] K4 S-meter characteristics

Wayne Burdick writes: Thanks for the note. I am a fan of radios being able to serve as test equipment, when that's a reasonable approach. > In addition to the S-meters, the K4 provides a convenient way to see > signal levels directly in dB (relative). Typically you'd zero the > reference level

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

David - I have an RS-35M, that sits on a shelf under my operating desk. I leave it on 24/7, and never gave any thought to acoustic hum from it. I just ducked my head down below the desktop, and 'thought' I could hear some hum. I turned off the power supply and verified that there is a little bit

Re: [Elecraft] OT: Astron RS-35M Transformer Hum

Fairly common. I have a different Astron linear supply and have had that issue. Make sure the cabinet and transformer screws are tight. Assuming there's a relatively small gap between the top of the transformer and the top of the case, stick something between the two surfaces (folded piece of

[Elecraft] OT: Astron RS-35M Transformer Hum

Does anyone have a way to dampen the physical hum generated by the transformer in an RS-35M PS? This really is just transformer hum I’m hearing, not signal hum…my station is fully bonded and as a result quiet in that regard. Most folks probably never hear this hum, but I have been “blessed”

Re: [Elecraft] K3S poor CW reported with N1MM+

I rather liked the old Russian tank radios. Whoop de whoop de whoop whoop de whoop. 73, Roger On 4/24/2020 9:40 AM, Carl Yaffey wrote: IMHO nothing beat the sound of CW from a Collins 32V3. Yeah, I’m old! 73 K8NU __ Elecraft

[Elecraft] K4/0

Hi Wayne: Is there any additional information available on the K4/0? Will it be required for off-site remote operation or will there be some way to interact the with K4 and all controls via software on a remote computer? Thanks and 73, Steve VE3XO

Re: [Elecraft] K3S poor CW reported with N1MM+

IMHO nothing beat the sound of CW from a Collins 32V3. Yeah, I’m old! 73 K8NU > On Apr 24, 2020, at 8:29 AM, John Simmons wrote: > > Use the QSK mode. There is no menu option to change the rise time- > intentionally. If you listen to CW contests there are some REALLY wide > signals out there.

Re: [Elecraft] Fwd: K3S poor CW reported with N1MM+

I'm already in QSK mode. I wonder if using QRQ mode would help? 73, WS1L On Fri, Apr 24, 2020 at 7:34 AM John Simmons wrote: > Use the QSK mode. There is no menu option to change the rise time- > intentionally. If you listen to CW contests there are some REALLY wide > signals out there. The

[Elecraft] Subject: Re: VOX on KX, using a Heil headset Questions

Hi  Elecrafters  and N3AO I have used a stereo headset with the electret mike on my KX3 for more than five years now Brand name is /Andrea, / model NC-65  ~ comes with an 8 foot cable with the appropriate 3/16" stereo plugs SETTINGS: on the KX3 I have the MIC gain ~ 43  and the VOX DLY ~

Re: [Elecraft] Fwd: K3S poor CW reported with N1MM+

Use the QSK mode. There is no menu option to change the rise time- intentionally. If you listen to CW contests there are some REALLY wide signals out there. The K3 won't let you do that. Side note: The Drake 4-line had the best sounding CW note, in my humble opinion. -de John NI0K Chuck

[Elecraft] Fwd: K3S poor CW reported with N1MM+

Here's some further info quoted from a fellow who has worked me a dozen times or so in the CWT's. We haven't had a rag chew so I'm hoping this is still a N1MM+ = computer = K3S issue. My last rag chew yesterday with a fellow when I asked, he described my bug-sent CW note as "very steady, pure"

Re: [Elecraft] K4 S-meter characteristics

Agree completely. I find all S meters to be totally inaccurate and next to useless, including my K3S’. > On Apr 24, 2020, at 7:43 AM, Morgan Bailey wrote: > > Maybe it is just me but, Turn the radio on, adjust the audio/rf/agc > controls, hear the station, work him, move on. I dont need a

Re: [Elecraft] K4 S-meter characteristics

Maybe it is just me but, Turn the radio on, adjust the audio/rf/agc controls, hear the station, work him, move on. I dont need a fancy dbm or an iconic number of engineering controls, to say what the dbm was when I worked the guy. When you contest, who the hell cares, hear him, work him, move on.

Re: [Elecraft] Elecraft K3s, etc. bonding

My tower grounds are my house grounds. All hardline is separately grounded though individual rods and tied to the house ground. My transceiver is tied to the house ground. I seriously doubt tying other equipment to that ground will reduce noise levels at all, not to speak of the difficulty

Re: [Elecraft] Elecraft K3s, etc. bonding

And in the meantime, lightning protection helps to reduce the noise and risks of 'everyday' static noise sources like wind, snow, blowing dust and even rain static.  HELPS, not removes. Having (last fall) just installed a basic dissipation system, the difference can be quite startling and can