Re: [Elecraft] KX3 No meter indication when transmitting digital

[Bill Frantz]

If I remember correctly, the KX3 can show zero bars when 
overdriven. I's easy to check. Just bring the level up slowly 
from zero and check that the ALC rises slowly.


Remember that there are at least 3 AF level controls. The one in 
the program, the OS level control, and the knob on the KX3.


I don't know why any of them would change suddenly though.

An external RF power meter or another receiver can check if you 
are transmitting.


73 Bill AE6JV

On 3/14/19 at 7:52 PM, estept...@gmail.com (Tony Estep) wrote:


I have been operating with FT8 and WSPR lately. Both use an audio-generated
digital signal just like any AFSK mode. I tune up my transmitter to show
4-5 bars on ALC. Everything seems to work at first, but after one or two
transmissions the display shows only one bar on the left and one on the
right -- and if I move the Mic Gain, all bars disappear leaving a blank
display. The transmit light stays on but I can't tell if I'm transmitting
any audio or not. What's going on??

thanks,
Tony KT0NY


---
Bill Frantz| Concurrency is hard. 12 out  | Periwinkle
(408)356-8506  | 10 programmers get it wrong. | 16345 
Englewood Ave
www.pwpconsult.com |- Jeff Frantz | Los Gatos, 
CA 95032


__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] Filter and W8ZR Pro 2

[K9FD]

Two Questions,
Anyone have a 1KHZ filter they are parting with?
Looking for a fair priced 1KHZ.

Second,  is anyone using a W8ZR station Pro 2 with the K3?
Just bought a station Pro2 and wanting to set it up for my
multiple k3 set up.   Looking to run USB through the Pro2
to switch to each radio.  Anyone done that?

Thank 73 Merv K9FD
__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KPA-1500 tuner questions

[Peter Dougherty]

I love this idea, but there's one problem, though. I only have one coax line
leading out of the shack. It runs from the Palstar (or it could run from the
KPA-1500) to the input of my antenna switch. I have 5 antennas connected off
that--three Yagis, and the 80m vee off the tower, and a 160 inverted-L in
the back-40. 

Antenna-2 on the K3s is my 6m antenna, and if I take the Palstar out of
line, how do I feed the vee separately? My 80m vee is also at about a 120
degree angle, about 65' at the apex, and it plays REALLY well to Europe, the
Pacific and North America. It doesn't do squat to Asia, unfortunately.

 - pjd

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Don Wilhelm
Sent: Thursday, March 14, 2019 10:59 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-1500 tuner questions

That is the antenna I use on 80 meters.  It has a double-humped SWR response
and stays below 2:1 between 3500 and 3900kHz.  Up at 4000kHz it is a little
higher than 3:1.  The 1/4 wave 75 ohm section is a transmission line
transformer.  The 1/2 wave 50 ohm line repeats the impedance at the antenna
feedpoint.

Mine is an inverted Vee with a 120 degree angle at the apex.

Since the 75 ohm section is 1/2 wavelength on 40 meters, the same feedline
can be used on 40.  So I also have two radiator wires for at right angles to
the 80 meter radiator.  Being at right angles, there is no interaction.

73,
Don W3FPR

On 3/14/2019 2:51 AM, Jim Brown wrote:
> 
> Here's a VERY old solution that W6NL has taught to his EE classes. 
> When I asked him about it, he says it's not his original idea, far 
> older than him.
> 
> Tune your 80M dipole to 3675 kHz, feed it with a half-wave of 50 ohm 
> coax starting at the antenna, then a quarter wave of 75 ohm line. Line 
> lengths are at 3675 kHz. Add 50 ohm coax as needed to reach the shack, 
> or coil up the excess if those two lengths are too long. The result 
> will be SWR below 2:1 from 3500 kHz to 3900 kHz. With good RG213 and 
> RG11, Line loss is about 0.5 dB at the resonant point and about 0.7 dB 
> at the limits.
> 
> If you want to do some engineering, you can probably tame that 40M 
> antenna too. Here's a tutorial applications note.
> http://k9yc.com/PacificonSmithChart.pdf
> 
> 73, Jim K9YC
__
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 support this email list: http://www.qsl.net/donate.html

__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] KX3 No meter indication when transmitting digital

[Tony Estep]

I have been operating with FT8 and WSPR lately. Both use an audio-generated
digital signal just like any AFSK mode. I tune up my transmitter to show
4-5 bars on ALC. Everything seems to work at first, but after one or two
transmissions the display shows only one bar on the left and one on the
right -- and if I move the Mic Gain, all bars disappear leaving a blank
display. The transmit light stays on but I can't tell if I'm transmitting
any audio or not. What's going on??

thanks,
Tony KT0NY
__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K1 Power Supply Melt Down

[Bill Johnson]

Chokes are not directional.  Check your board for solder bridges and let us 
know what find.   Since the board is mostly discreet parts, start looking at 
the battery connection and work your way into the  circuitry. Is a part 
blackened, or very dark?

73,
Bill
K9YEQ


From: elecraft-boun...@mailman.qth.net  on 
behalf of Tom Johnson 
Sent: Thursday, March 14, 2019 8:34:47 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K1 Power Supply Melt Down

I just completed my K1 RF Board through to the DC Voltage Checks section.  I
plugged into a 12 V Battery Pack and did not get any smoke from the board
when I turned on S1.  But I did not get a voltage reading from pin 15 on P1.
I did get a reading between 3.8 - 4.2 on P1 pin 16.  I went back to trying
to get a reading from P1 pin 15, and then noticed my battery pack (8 1.5 V
AA) was bubbling and melting down - very HOT!

Does anyone have any clues as to what went wrong?  My only guess is if RFC1
(33 uH RF choke) and RFC4 (100 uH RF choke) are directional, I may have them
reversed: I thought like resistors they are not directional.

73



--
Sent from: http://elecraft.365791.n2.nabble.com/
__
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 support this email list: http://www.qsl.net/donate.html
__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] K1 Power Supply Melt Down

[Tom Johnson]

I just completed my K1 RF Board through to the DC Voltage Checks section.  I
plugged into a 12 V Battery Pack and did not get any smoke from the board
when I turned on S1.  But I did not get a voltage reading from pin 15 on P1. 
I did get a reading between 3.8 - 4.2 on P1 pin 16.  I went back to trying
to get a reading from P1 pin 15, and then noticed my battery pack (8 1.5 V
AA) was bubbling and melting down - very HOT!  

Does anyone have any clues as to what went wrong?  My only guess is if RFC1
(33 uH RF choke) and RFC4 (100 uH RF choke) are directional, I may have them
reversed: I thought like resistors they are not directional.

73



--
Sent from: http://elecraft.365791.n2.nabble.com/
__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] Remote On/Off KPA-1500

[Dick Dievendorff]

Some do this with an RCA cable from the K3 rear panel 12v line to the amp REM 
connector. The amp turns on and off with the rig.  Current draw is minimal; you 
can also use the same K3 12v to power your P3.

73 de Dick, K6KR

> On Mar 14, 2019, at 17:57, Charlie Wirth  wrote:
> 
> Hello:
> 
> I recently purchased a KPA-1500 amplifier.  I would like to be able to turn 
> on the amplifier remotely.  The manual says to apply 12v to the REM jack.  I 
> was wondering if anyone is doing this and what they are using to apply the 12 
> volts.
> 
> Thanks,
> 
> Charlie W3DDF
> __
> 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 support this email list: http://www.qsl.net/donate.html
__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] Remote On/Off KPA-1500

[Charlie Wirth]

Hello:

 I recently purchased a KPA-1500 amplifier.  I would like to be able to turn on 
the amplifier remotely.  The manual says to apply 12v to the REM jack.  I was 
wondering if anyone is doing this and what they are using to apply the 12 volts.

Thanks,

Charlie W3DDF
__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K-POD Function key #'s mapping/Macro Assignments not matching K3 util assignments

[Wes]

Do you have the latest FW in your K3S?


On 3/14/2019 3:36 PM, Brian Pietrzyk (ve3bwp) wrote:

I read through the archive and found no mention of this issue:

I just got a k-Pod and a K3s and am wanting to program Function keys but the 
tap assignments don’t seem to work. The hold ones seem to.

I am referring to table 11-3 / p 235 in the Fred Kady K3s pdf ebook.

The table says tap F1-F8 should map to K3 Macros 9-16, Hold F1-F8 should map to 
K3 Macros 1-8.

I assigned F1 Tap to VFO FINE and Hold F1 to VFO Course. By putting SWT49; and 
SWH49; commands in Macro 1 & 9 lines respectively and this works as expected.

For F2 TAP I just want to toggle NR on/off. So I put SWT34; into Macro 10. When 
I tap F2 nothing happens and VFO B displays MACRO 1. So I put SWT34; into MACRO 
2 and Hold F2 works as expected. NR toggles on/off and VFO B displays MACRO 2 
as expected when I hold F2. Not sure why Tap F2 acting this way?

I have the same issue with F3 & F4. I assigned BAND ^ and BAND v to tap and nothing 
happens and VFO B display MACRO 1. Hold F3&4 Works fine.

So essentially I can only get Tap F1 to work. I have to Hold the get the rest 
of the function keys to work. I tried reloading the firmware into the Kpod and 
no change. Did I get a defective KPOD?

Thanks,

Brian ve3bwp


__
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 support this email list: http://www.qsl.net/donate.html



__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] K-POD Function key #'s mapping/Macro Assignments not matching K3 util assignments

[Brian Pietrzyk (ve3bwp)]

I read through the archive and found no mention of this issue:

I just got a k-Pod and a K3s and am wanting to program Function keys but the 
tap assignments don’t seem to work. The hold ones seem to. 

I am referring to table 11-3 / p 235 in the Fred Kady K3s pdf ebook.

The table says tap F1-F8 should map to K3 Macros 9-16, Hold F1-F8 should map to 
K3 Macros 1-8.

I assigned F1 Tap to VFO FINE and Hold F1 to VFO Course. By putting SWT49; and 
SWH49; commands in Macro 1 & 9 lines respectively and this works as expected.

For F2 TAP I just want to toggle NR on/off. So I put SWT34; into Macro 10. When 
I tap F2 nothing happens and VFO B displays MACRO 1. So I put SWT34; into MACRO 
2 and Hold F2 works as expected. NR toggles on/off and VFO B displays MACRO 2 
as expected when I hold F2. Not sure why Tap F2 acting this way?

I have the same issue with F3 & F4. I assigned BAND ^ and BAND v to tap and 
nothing happens and VFO B display MACRO 1. Hold F3&4 Works fine. 

So essentially I can only get Tap F1 to work. I have to Hold the get the rest 
of the function keys to work. I tried reloading the firmware into the Kpod and 
no change. Did I get a defective KPOD?

Thanks,

Brian ve3bwp


__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] A New Choke Book - Some Questions

[Mike Walkington]

Hi Jim,

Thanks for the New Choke Cookbook.
Looking at your data, it seems to me that I could build a two core choke 
for the higher frequency bands and "spread" the overall choking 
impedance out by using different turns on each core, ie 11 turns on a 
2.4" and 12 turns on a 2.4" . I believe there are no issues doing so, 
but would appreciate your confirmation.


Also, do you have any guidance on the spacing required when packaging a 
two core choke, ie if the two cores were in a box, what vertical spacing 
is required between them?


Cheers
Mike, VK1OO

__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3: Use of David Clarke Headsets

[Dave Cole (NK7Z)]

Thanks Jim!

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 3/14/19 11:11 AM, Jim Brown wrote:

On 3/14/2019 7:51 AM, Dave Cole (NK7Z) wrote:
Has anyone interfaced a set of DC H7030 headsets to a K3?  If so, what 
were the results?  Did they work, how did they sound on receive and 
transmit?  I have inherited a set, and am considering using them, and 
looking for thoughts on this prior to getting them connected... 


No reason why they shouldn't work -- figure out how the cable is wired, 
put connectors on the cable, and plug it in! The real issue with David 
Clark headsets is comfort. I've tied them on more than once and found 
them to be an instrument of torture, but comfort with headphones is 
quite personal, depending on how our heads and ears are shaped, so YMMV.


73, Jim K9YC

__
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 support this email list: http://www.qsl.net/donate.html

__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] PS Comparison: Powerwerz SS-30DV vs. MFJ-4230MVP

[Gary Johnson]

> 
> * The fan became very noisy.  This was fixed by relaxing the securing bolts 
> and placing thin spacers between the fan and the rear panel. 

Better solution: Get an ultra-quiet fan. I’ve replaced every fan in every power 
supply, computer, and piece of test equipment that I own. Totally inaudible, 
and cheap. They come in all sizes and various airflows and include compliant 
mounts. This $13, 60mm one I got from Amazon fit my little Samlex 1223:  
Nanoxia Deep Silence Fan 60mm 2000rpm Cooling, NDS60-2000

-Gary NA6O


__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] PS Comparison: Powerwerz SS-30DV vs. MFJ-4230MVP

[Andy Durbin]

The MFJ-4230MVP, Powerwerx SS-30DV, and Powerwerx SPS-30DM appear to be three 
of many variants of the same basic power supply.  I have the Jetstream JTPS31MB 
which seems to be one of the same family.  It has several different 
"punch-outs" to allow it to be produced in several different configurations.
I expect they all come off the same production line.

I have been running this power power for over 6 years to power my TS-590S and a 
few ancillaries.  It was worked well but there have been a few issues:

* The fan became very noisy.  This was fixed by relaxing the securing bolts and 
placing thin spacers between the fan and the rear panel. 
*  There is also no provision for isolating the negative side of the supply 
from ground.  My attempts to provide that isolation had unintended consequences 
so I removed the mod.

My guess is they are all the same inside and the choice should be made based on 
preference for metering, voltage adjustment, and terminal configuration.

Andy, k3wyc



__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] PS Comparison: Powerwerz SS-30DV vs. MFJ-4230MVP

[Logan R Zintsmaster]

I have both. Internally, the main circuit card is the same in both supplies.  
Hence, the similar packaging and form factor.  There are places on the main 
board for different options, like the metering, voltage adjustment, etc. and 
that’s how they get the different models and brands.  I’ve had no noise 
problems with either one.  I have replaced a couple of fans on my Powerwerx 
supplies. 

Logan, KZ6O 

Sent from my iPhone

> On Mar 14, 2019, at 9:07 AM, EricJ  wrote:
> 
> I've had the SPS-30DM for 7 or 8 years. I use it to power a K2/10 and K2/100 
> plus all the external accessories. Quiet, absolutely solid as a brick. It 
> replaced an old Astron RM-20A which would make a nice foot warmer and 
> massager. Very happy the the SPS and Powerwerx in general. I buy nearly all 
> my 12v power connectors from them.
> 
> Eric KE6US
> 
>> On 3/13/2019 8:38 PM, Pete Spotts wrote:
>> Hi Bob,
>> 
>> I have a Powerwerx supply, but my model is the SPS-30DM. Variable voltage, 
>> useful digital meter displaying voltage and current, and I've had no noise 
>> problems with it. It's another $50 above the SS-30DV's price, but I have no 
>> doubt noise will not be an issue with the model you listed.
>> 
>> With best regards,
>> 
>> Pete
>> -- 
>> 
>> Peter N. Spotts -- NM5PS
>> ARRL Public Information Coordinator, New Mexico Section
>> http://www.nm5ps.net   Email: nm...@arrl.net | Skype: pspotts
>> AMSAT #40612 | CalQRP #67 | G-QRP #13202 | NAQCC #2446 | NEQRP #714
>> Polar Bear #348 | QCWA #34679 | QRP-ARCI #4174 | SKCC #4853S
>> 
>>> On 3/13/19 11:08 AM, krug261--- via Elecraft wrote:
>>> Greetings all,
>>> I am in the market for a compact power supply. The fact that Elecraft 
>>> suggests/sells a third-party unit (SS-30DV) provides an automatic sense of 
>>> comfort. However, always trying to complicate life I was also looking at 
>>> the MFJ-4230MVP. Same dimensions, weight, power connections. I do like the 
>>> variable voltage control on the MFJ. Not sure why I would need it, but 
>>> seems useful.
>>> I doubt if anyone has BOTH units, but even your impressions of either of 
>>> them would be very helpful.
>>> Thanks and 73, Bob KA2TQVKX3 #9842
>>> __
>>> 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 support this email list: http://www.qsl.net/donate.html
>> 
>> __
>> 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 support this email list: http://www.qsl.net/donate.html
> __
> 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 support this email list: http://www.qsl.net/donate.html

__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] K3: Use of David Clarke Headsets

[Jim Brown]

On 3/14/2019 7:51 AM, Dave Cole (NK7Z) wrote:
Has anyone interfaced a set of DC H7030 headsets to a K3?  If so, what 
were the results?  Did they work, how did they sound on receive and 
transmit?  I have inherited a set, and am considering using them, and 
looking for thoughts on this prior to getting them connected... 


No reason why they shouldn't work -- figure out how the cable is wired, 
put connectors on the cable, and plug it in! The real issue with David 
Clark headsets is comfort. I've tied them on more than once and found 
them to be an instrument of torture, but comfort with headphones is 
quite personal, depending on how our heads and ears are shaped, so YMMV.


73, Jim K9YC

__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] PS Comparison: Powerwerz SS-30DV vs. MFJ-4230MVP

[EricJ]

I've had the SPS-30DM for 7 or 8 years. I use it to power a K2/10 and 
K2/100 plus all the external accessories. Quiet, absolutely solid as a 
brick. It replaced an old Astron RM-20A which would make a nice foot 
warmer and massager. Very happy the the SPS and Powerwerx in general. I 
buy nearly all my 12v power connectors from them.


Eric KE6US

On 3/13/2019 8:38 PM, Pete Spotts wrote:

Hi Bob,

I have a Powerwerx supply, but my model is the SPS-30DM. Variable 
voltage, useful digital meter displaying voltage and current, and I've 
had no noise problems with it. It's another $50 above the SS-30DV's 
price, but I have no doubt noise will not be an issue with the model 
you listed.


With best regards,

Pete
--

Peter N. Spotts -- NM5PS
ARRL Public Information Coordinator, New Mexico Section
http://www.nm5ps.net   Email: nm...@arrl.net | Skype: pspotts
AMSAT #40612 | CalQRP #67 | G-QRP #13202 | NAQCC #2446 | NEQRP #714
Polar Bear #348 | QCWA #34679 | QRP-ARCI #4174 | SKCC #4853S

On 3/13/19 11:08 AM, krug261--- via Elecraft wrote:

Greetings all,
I am in the market for a compact power supply. The fact that Elecraft 
suggests/sells a third-party unit (SS-30DV) provides an automatic 
sense of comfort. However, always trying to complicate life I was 
also looking at the MFJ-4230MVP. Same dimensions, weight, power 
connections. I do like the variable voltage control on the MFJ. Not 
sure why I would need it, but seems useful.
I doubt if anyone has BOTH units, but even your impressions of either 
of them would be very helpful.

Thanks and 73, Bob KA2TQVKX3 #9842
__
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 support this email list: http://www.qsl.net/donate.html


__
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 support this email list: http://www.qsl.net/donate.html

__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KPA-1500 tuner questions

[Don Wilhelm]

That is the antenna I use on 80 meters.  It has a double-humped SWR 
response and stays below 2:1 between 3500 and 3900kHz.  Up at 4000kHz it 
is a little higher than 3:1.  The 1/4 wave 75 ohm section is a 
transmission line transformer.  The 1/2 wave 50 ohm line repeats the 
impedance at the antenna feedpoint.


Mine is an inverted Vee with a 120 degree angle at the apex.

Since the 75 ohm section is 1/2 wavelength on 40 meters, the same 
feedline can be used on 40.  So I also have two radiator wires for at 
right angles to the 80 meter radiator.  Being at right angles, there is 
no interaction.


73,
Don W3FPR

On 3/14/2019 2:51 AM, Jim Brown wrote:


Here's a VERY old solution that W6NL has taught to his EE classes. When 
I asked him about it, he says it's not his original idea, far older than 
him.


Tune your 80M dipole to 3675 kHz, feed it with a half-wave of 50 ohm 
coax starting at the antenna, then a quarter wave of 75 ohm line. Line 
lengths are at 3675 kHz. Add 50 ohm coax as needed to reach the shack, 
or coil up the excess if those two lengths are too long. The result will 
be SWR below 2:1 from 3500 kHz to 3900 kHz. With good RG213 and RG11, 
Line loss is about 0.5 dB at the resonant point and about 0.7 dB at the 
limits.


If you want to do some engineering, you can probably tame that 40M 
antenna too. Here's a tutorial applications note. 
http://k9yc.com/PacificonSmithChart.pdf


73, Jim K9YC

__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] K3: Use of David Clarke Headsets

[Dave Cole (NK7Z)]

Hi,

Has anyone interfaced a set of DC H7030 headsets to a K3?  If so, what 
were the results?  Did they work, how did they sound on receive and 
transmit?  I have inherited a set, and am considering using them, and 
looking for thoughts on this prior to getting them connected...


--
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] Fwd: Where is the 1500 KHz. HPF in the K3/K3s

[Michael Blake via Elecraft]

Correction - "1.8MHz HPF"

73 - Mike - K9JRI
 

> On Mar 14, 2019, at 10:12 AM, Michael Blake via Elecraft 
>  wrote:
> 
> 
> Can anyone provide me with the location of the 160M HPF on the K3s schematic? 
>  On the KX3 schematic it is clearly labeled “1.8 KHz. HPF” but I have been 
> unable to find the similar circuit on the K3s schematic.
> 
> Since you must use the RX  IN connector to receive on 630M it is obviously in 
> the circuit but I cannot find it on the drawings.
> 
> Any help?
> 
> 73 - Mike - K9JRI
> 
> 
> 
> 
> 
>> Begin forwarded message:
>> 
>> From: Michael Blake via Elecraft 
>> Subject: [Elecraft] Where is the 1500 KHz. HPF in the K3/K3s
>> Date: March 10, 2019 at 9:38:49 AM EDT
>> To: Elecraft Mailing List 
>> Reply-To: Michael Blake 
>> 
>> I understand that a BCB HPF is necessary to protect the PIN diode switches 
>> from BCB (Broadcast Band) overload but I can not find it in the K3s 
>> schematics.  Can anyone tell me which sheet and components make up this 
>> filter.
>> 
>> I understand that to receive 630M you bypass the HP filter by using the RX 
>> IN but I am curious where it is on the schematic.
>> 
>> Michael Blake
>> k9...@mac.com 
>> 
>> 
>> 
>> 
>> 
>> 
>> __
>> 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 support this email list: http://www.qsl.net/donate.html
> 
> __
> 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 support this email list: http://www.qsl.net/donate.html

__
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 support this email list: http://www.qsl.net/donate.html

[Elecraft] Fwd: Where is the 1500 KHz. HPF in the K3/K3s

[Michael Blake via Elecraft]

Can anyone provide me with the location of the 160M HPF on the K3s schematic?  
On the KX3 schematic it is clearly labeled “1.8 KHz. HPF” but I have been 
unable to find the similar circuit on the K3s schematic.

Since you must use the RX  IN connector to receive on 630M it is obviously in 
the circuit but I cannot find it on the drawings.

Any help?

73 - Mike - K9JRI





> Begin forwarded message:
> 
> From: Michael Blake via Elecraft 
> Subject: [Elecraft] Where is the 1500 KHz. HPF in the K3/K3s
> Date: March 10, 2019 at 9:38:49 AM EDT
> To: Elecraft Mailing List 
> Reply-To: Michael Blake 
> 
> I understand that a BCB HPF is necessary to protect the PIN diode switches 
> from BCB (Broadcast Band) overload but I can not find it in the K3s 
> schematics.  Can anyone tell me which sheet and components make up this 
> filter.
> 
> I understand that to receive 630M you bypass the HP filter by using the RX IN 
> but I am curious where it is on the schematic.
> 
> Michael Blake
> k9...@mac.com 
> 
> 
> 
> 
> 
> 
> __
> 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 support this email list: http://www.qsl.net/donate.html

__
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 support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] KPA-1500 tuner questions

[Larry (K8UT)]

Peter,

Could you use a fancy Band Decoder that provides auxiliary outputs based 
on operating frequency (not band)? Use the auxiliary outputs to 
automatically enable/disable the Palstar tuner when your 40 and 80 
operating frequencies require. Otherwise keep the Palstar out of 
circuit.


See: www.hamprojects.info/FreqEZ

-larry (K8UT)

-- Original Message --
From: "Peter Dougherty" 
To: "'K9MA'" 
Cc: "'Reflector Elecraft'" 
Sent: 2019-03-14 01:45:28
Subject: Re: [Elecraft] KPA-1500 tuner questions


Well that's just it, the SWR is very, very high in the phone portions of
both 40 and 80.

I can't see any other way to accomplish full automated operation without the
second tuner. I am loathe to have two of them together, but I just can't see
any other way. I occasionally remote my own station, and even when not, I
can't risk another high power/high-SWR error, so on QSY I have no
alternative but to pre-tune before keydown.

40m is below 2:1 until around 7090ish, then rises very rapidly above that.
It's 8:1 at 7295.
80m is below 2:1 from 3500 to 3700ish, then rises to 10:1 by 4000 (although
it's closer to 5.5:1 at 3850, as high as I'll ever go.

 - pjd

-Original Message-

The ATU in the KPA1500 alone will achieve the 1.2:1 match with the 2.09
firmware, now in beta. The external tuner is not necessary, unless the
antenna SWR is very high.

73,
Scott K9MA

--

Scott Ellington

 --- via iPad


 On Mar 12, 2019, at 10:24 PM, Peter Dougherty  wrote:

 Thanks, Scott!
 I'm going to change the way I do things so that ATU is always in, and
 the Palstar HF-Auto switches to AUTO mode rather than Manual to keep
 the match seen by the KPA below 1.2:1

 - pjd

 -Original Message-
 From: K9MA 
 Sent: Tuesday, March 12, 2019 1:53 PM
 To: Peter Dougherty 
 Cc: Reflector Elecraft 
 Subject: Re: [Elecraft] KPA-1500 tuner questions

 Just a general comment on the KPA1500: My experience with it shows
 that the SWR has to be below 1.2:1 at the amplifier output (ATU input)
 to run reliably at full power. If the SWR is higher than that, the amp
 will often fault due to excessive current or drive power before
 reaching 1500 W.  (And may splatter on SSB.) Elecraft recently updated
 the ATU firmware to consistently find a better match, and it really helps.

 73,
 Scott K9MA

 --

 Scott Ellington

 --- via iPad


 On Mar 11, 2019, at 8:49 PM, Peter Dougherty  wrote:

 I have a couple of questions about the KPA1500's internal tuner.

 For the most part, I leave the tuner inline. Except for two sub-bands
 (SSB on both 40 and 80m) I am well below 2:1, and maybe 2.5:1 at the
 top end of 160m. The KPA does a good job throughout.

 The problems/questions arise when I need to transition between the
 KPA's internal tuner on the bottom ends of both 40 and 80, and the
 external Palstar HF-Auto tuner, which I need to wrangle very high
 SWRs on the phone portions of those bands. Obviously I don't want
 both automatic tuners inline at the same time. The situation is most
 acute on

 40.


 The HF-Auto (external automatic tuner) is bypassed everywhere except
 the range of 3650 to 4000, and 7100 to 7300. I would like to
 automatically have the KPA1500's tuner go into bypass at the above
 ranges, just as the Palstar auto-tuner bypasses outside of those
 ranges. Is this somehow possible, or must I manually switch the tuner
 in and out when I cross the appropriate thresholds?

 Second question, and I think this relates to the whole "bins" thing,
 which I don't understand, relates to having different tuning
 solutions on the same band segment. This could be handy for me on
 80m. Unlike on 40, for 80 I have an inverted vee, and it's easy for
 me to drop the ends and change the length of the antenna, so that
 instead of being resonant at 3550 I could make it 3700. I did this
 for the ARRL-SSB contest and it worked pretty well. Is it possible to
 have two different sets of memorized tuning solutions in the
 KPA-1500, in the event I have the vee set for CW (normal) or SSB (for

phone contests only)?



 -
 73 and Good DX
 Peter, W2IRT



 President, North Jersey DX Association

 DXCC Card Checker
 Letter O Manager, ARRL Incoming 2nd District QSL bureau



 __
 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 support this
 email
 list: http://www.qsl.net/donate.html






__
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 support this email list: http://www.qsl.net/donate.html

__

Re: [Elecraft] KPA-1500 tuner questions

[Jim Brown]

On 3/13/2019 10:45 PM, Peter Dougherty wrote:

Well that's just it, the SWR is very, very high in the phone portions of
both 40 and 80.


Here's a VERY old solution that W6NL has taught to his EE classes. When 
I asked him about it, he says it's not his original idea, far older than 
him.


Tune your 80M dipole to 3675 kHz, feed it with a half-wave of 50 ohm 
coax starting at the antenna, then a quarter wave of 75 ohm line. Line 
lengths are at 3675 kHz. Add 50 ohm coax as needed to reach the shack, 
or coil up the excess if those two lengths are too long. The result will 
be SWR below 2:1 from 3500 kHz to 3900 kHz. With good RG213 and RG11, 
Line loss is about 0.5 dB at the resonant point and about 0.7 dB at the 
limits.


If you want to do some engineering, you can probably tame that 40M 
antenna too. Here's a tutorial applications note. 
http://k9yc.com/PacificonSmithChart.pdf


73, Jim K9YC

__
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 support this email list: http://www.qsl.net/donate.html