[Elecraft] Groundplane antennas (was: Re: Elecraft CW Net Announcement)

[Victor Rosenthal 4X6GP]

A symmetrical arrangement of radials (which implies more than one) will 
reduce common mode current and high-angle radiation, which are usually 
considered undesirable (although for local QSOs the high-angle radiation 
can be useful).


If you have an unsymmetrical radial arrangement, it's best to put a 
choke at the feedpoint to kill the common mode current. Almost in any 
case there will be some imbalance caused by nearby objects, so a choke 
is a good idea.


Two radials is slightly less efficient than three or four, but not that 
much.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
.
On 27/07/2020 5:25, Fred Jensen wrote:
It's a fairly simple antenna.  Yes, one radial is all you really "need," 
a couple more help improve efficiency and increase the BW.  In the olden 
daze [50's], we'd use 3 or 4 and cut them just a little different.  Also 
increased the BW, especially on 10, and in the later 50's, 10 was open 
28000 - 29700, 24/7.  It's really a very forgiving antenna.  The 
radials, with rope extensions are often used as guys as well.  The droop 
angle will affect the main lobe elevation somewhat, but I'll bet I could 
do a blind "taste" test with you and you'd never really know the 
difference.  That angle is more often used to adjust the impedance at 
the feed point.


Make that angle 90 deg and you have a vertical half-wave dipole 
center-fed out of phase.  Make the elements 1/2 wave each, mechanically 
easy on 10 and even 15, and cophase feed them in the center, and you 
have a Franklin vertical [see KFBK, one of the last ones I know of]. 
Very versatile basic design, works great, lasts a long time.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/26/2020 3:38 PM, Rick NK7I wrote:
The reading I've done says only one radial is required; that the 
'favoring' in the direction of the radial is not enough to be worried 
about; that there is no cancellation from opposing (or just more) 
radials.  I have used a single radial ground plane and found this to 
be true (at 6' over dirt on 80M).  It favors a morning net 800 miles 
away, yet worked DX in any other direction easily (then I moved to a 
rotating dipole at 60' which beats it out).  That ground plane easily 
beat out a horizontal dipole I used before them all (fixed, in the 
'wrong' angle because of tree location).


Both the radiator and radial are tuned (equally), but the angle of 
difference from dipole to the traditional 90 deg ground plane will 
cause the resistance to vary (roughly 72 ohms as a dipole, dropping to 
~50 ohms when at 90 degrees),  So if another angle is chosen (inverted 
Y), to match a 50 ohm feedline (to have a 1:1 SWR), the element 
lengths are adjusted equally until that match is made; altering the 
resonance of the wires (maximum transfer of energy).  And inverted Y 
antenna would be between that 50-72 ohm range, still acceptably low 
SWR to not mess with.


Which again, is not a significant variance, so put it up, try it out 
and compare to other antennas.  Wire is cheap enough to play with and 
try things out.


Modeling will demonstrate the pattern and 'take off' angles quite 
clearly; reality is often different because of local objects, ground 
resistance, height...


Don't forget to add a common mode current choke at the feed.

73,
Rick NK7I



On 7/26/2020 11:57 AM, Don Wilhelm wrote:

Fred,

That would be correct if they are oriented at 180 degrees from each 
other so as to cancel the horizontal radiation.  Elevated radials 
must be tuned to be effective, but only 2 are needed. How much tuning 
will depend on the height above ground.


73,
Don W3FPR



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[Elecraft] Elecraft CW Net Report

[kevinr]

Good Evening,

   Twenty meters had deep QSB and summer QRN.  But it was fun to hear 
you all.  I received more email than I did check ins though. I'll work 
on that antenna this week and test it next Sunday.  I'll build it close 
to resonance around 7.1 MHz.  From what I have read the radiation 
pattern will be almost circular.  My inverted V's have a nearly circular 
pattern too which helps.  I'm not sure if I can use it on 20 meters 
too.  More coax would be nice; then I could test more antennas.


   The comet is fading now.  I'm struggling against the evening 
clouds.  By the time the sky is dark enough to see the comet well the 
haze has come in.  Viewing Mercury on each apparition was normal while I 
was living in Albuquerque.  I think I have seen it once since I moved 
back to the PNW.  Winter constellations are best here since the clouds 
form below me and block any lights.



  On 14050.5 kHz at 2200z:

NO8V - John - MI

W0CZ - Ken - ND

K4JPN - Steve - GA

K6XK - Roy - IA

K0DTJ - Brian - CA


  On 7047.5 kHz at z:

K0DTJ - Brian - CA


Hopefully there won't be too much heavy weather this week. Summer 
thunderstorms form tornadoes too often.  However, the crops need the 
rain.  I remember lying in bed trying to sleep in the hot, humid nights 
of the Midwest.  Instead of the mantle clock I could listen to the corn 
growing about fifty yards away.


   Until next week 73,

  Kevin.  KD5ONS


-



Antelope Freeway 1/256 mile



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Re: [Elecraft] Elecraft CW Net Announcement

[Fred Jensen]

It's a fairly simple antenna.  Yes, one radial is all you really "need," 
a couple more help improve efficiency and increase the BW.  In the olden 
daze [50's], we'd use 3 or 4 and cut them just a little different.  Also 
increased the BW, especially on 10, and in the later 50's, 10 was open 
28000 - 29700, 24/7.  It's really a very forgiving antenna.  The 
radials, with rope extensions are often used as guys as well.  The droop 
angle will affect the main lobe elevation somewhat, but I'll bet I could 
do a blind "taste" test with you and you'd never really know the 
difference.  That angle is more often used to adjust the impedance at 
the feed point.


Make that angle 90 deg and you have a vertical half-wave dipole 
center-fed out of phase.  Make the elements 1/2 wave each, mechanically 
easy on 10 and even 15, and cophase feed them in the center, and you 
have a Franklin vertical [see KFBK, one of the last ones I know of].  
Very versatile basic design, works great, lasts a long time.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/26/2020 3:38 PM, Rick NK7I wrote:
The reading I've done says only one radial is required; that the 
'favoring' in the direction of the radial is not enough to be worried 
about; that there is no cancellation from opposing (or just more) 
radials.  I have used a single radial ground plane and found this to 
be true (at 6' over dirt on 80M).  It favors a morning net 800 miles 
away, yet worked DX in any other direction easily (then I moved to a 
rotating dipole at 60' which beats it out).  That ground plane easily 
beat out a horizontal dipole I used before them all (fixed, in the 
'wrong' angle because of tree location).


Both the radiator and radial are tuned (equally), but the angle of 
difference from dipole to the traditional 90 deg ground plane will 
cause the resistance to vary (roughly 72 ohms as a dipole, dropping to 
~50 ohms when at 90 degrees),  So if another angle is chosen (inverted 
Y), to match a 50 ohm feedline (to have a 1:1 SWR), the element 
lengths are adjusted equally until that match is made; altering the 
resonance of the wires (maximum transfer of energy).  And inverted Y 
antenna would be between that 50-72 ohm range, still acceptably low 
SWR to not mess with.


Which again, is not a significant variance, so put it up, try it out 
and compare to other antennas.  Wire is cheap enough to play with and 
try things out.


Modeling will demonstrate the pattern and 'take off' angles quite 
clearly; reality is often different because of local objects, ground 
resistance, height...


Don't forget to add a common mode current choke at the feed.

73,
Rick NK7I



On 7/26/2020 11:57 AM, Don Wilhelm wrote:

Fred,

That would be correct if they are oriented at 180 degrees from each 
other so as to cancel the horizontal radiation.  Elevated radials 
must be tuned to be effective, but only 2 are needed. How much tuning 
will depend on the height above ground.


73,
Don W3FPR



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Re: [Elecraft] K3s: microphone connector 8V current

[Grant Youngman]

i’m not interesting in using the 8V line for mic element bias.  That was 
someone else.  My application is to power an external device between a mic and 
a K3/K4 from that line.  

I can, of course, use a battery.  But it would be much simpler if the 8V line 
could supply at least 20ma without releasing smoke :-)

The individual that asked this question initially, was looking for the 
possibility of 50ma.

Grant NQ5T

> On Jul 26, 2020, at 8:21 PM, Don Wilhelm  wrote:
> 
> Grant,
> 
> The MH2/MH4 mic does not use the 8 volts directly - there is a resistor 
> between the 8 volt supply and the AF line,
> and that is where the 10ma is used to power the electret elemant.
> The 10 ma. used by the microphone has nothing to do with the total current 
> available from pin 6.
> 
> 73,
> Don W3FPR
> 
> On 7/26/2020 8:05 PM, Grant Youngman wrote:
>> I have the same question about the current available for the 8V at the mic 
>> connector.  Is it limited to 10ma, or will it actually support a somewhat 
>> higher continuous current draw safely.  Not just for the k3, but also the K4.
>> 
>> Grant NQ5T
>> 
>> 
>>> On Jul 26, 2020, at 7:46 PM, Don Wilhelm  wrote:
>>> 
>>> Henk,
>>> 
>>> If indeed it is for a mic preamp, then try it without the preamp.  The K3S 
>>> has 2 stages of mic AF gain.  Normal for the usual ham mics, and a Hi level 
>>> for low gain mic elements.
>>> 
>>> You must turn on bias to have the 8 volts appear at the mic jack.  Do not 
>>> use with direct connection of a dynamic mic - it makes the mic 'sound 
>>> funny'.
>>> 
>>> 73,
>>> Don W3FPR
>>> 
>>> On 7/26/2020 5:40 PM, Nr4c wrote:
 What are you going to use this  voltage for? I think it’s for a mic 
 preamp. It is not the source of bias for an electret mic. That comes on 
 the mic pin when turned On in the menu.
>>> __
> 

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[Elecraft] FS - 13 kHz FM filter for K3 / K3s - SOLD!

[Robert Brown via Elecraft]

Thanks to all who inquired.

Bob Brown, N1CVX 

Sent from my iPad
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Re: [Elecraft] Pelican case for K3?

[Larry Shapiro]

Harbor Freight now makes a copy of the Pelican.

Apache 5800.
About half the price.
You will love it,
Larry K6ro


-Original Message- 
From: charlie carroll

Sent: Sunday, July 26, 2020 6:26 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Pelican case for K3?

Eric:
I use a 1560.  It handles the K3, a paddle, power supply, with some
space left over for cables and misc. other stuff.

73 charlie, k1xx

On 7/26/2020 9:16 PM, eric norris via Elecraft wrote:
Does anybody know what model Pelican case is the best fit for a K3? 
Thanks!


73, Eric WD6DBM
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Re: [Elecraft] Pelican case for K3?

[charlie carroll]

Eric:
I use a 1560.  It handles the K3, a paddle, power supply, with some 
space left over for cables and misc. other stuff.


73 charlie, k1xx

On 7/26/2020 9:16 PM, eric norris via Elecraft wrote:

Does anybody know what model Pelican case is the best fit for a K3?  Thanks!

73, Eric WD6DBM
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[Elecraft] Pelican case for K3?

[eric norris via Elecraft]

Does anybody know what model Pelican case is the best fit for a K3?  Thanks!

73, Eric WD6DBM
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Re: [Elecraft] K3s: microphone connector 8V current

[Don Wilhelm]

Grant,

The MH2/MH4 mic does not use the 8 volts directly - there is a resistor 
between the 8 volt supply and the AF line,

and that is where the 10ma is used to power the electret elemant.
The 10 ma. used by the microphone has nothing to do with the total 
current available from pin 6.


73,
Don W3FPR

On 7/26/2020 8:05 PM, Grant Youngman wrote:

I have the same question about the current available for the 8V at the mic 
connector.  Is it limited to 10ma, or will it actually support a somewhat 
higher continuous current draw safely.  Not just for the k3, but also the K4.

Grant NQ5T



On Jul 26, 2020, at 7:46 PM, Don Wilhelm  wrote:

Henk,

If indeed it is for a mic preamp, then try it without the preamp.  The K3S has 
2 stages of mic AF gain.  Normal for the usual ham mics, and a Hi level for low 
gain mic elements.

You must turn on bias to have the 8 volts appear at the mic jack.  Do not use 
with direct connection of a dynamic mic - it makes the mic 'sound funny'.

73,
Don W3FPR

On 7/26/2020 5:40 PM, Nr4c wrote:

What are you going to use this  voltage for? I think it’s for a mic preamp. It 
is not the source of bias for an electret mic. That comes on the mic pin when 
turned On in the menu.

__


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Re: [Elecraft] Radiosport MH-350ADJ with K2?

[Brian Denley]

It’s a electret condenser mike element and requires bias 5.6-10k resister as 
Don says.

Brian Denley
KB1VBF
Sent from my iPad

> On Jul 26, 2020, at 7:40 PM, Don Wilhelm  wrote:
> 
> Steve,
> 
> I am not familiar with that particular mic element, but --
> 
> If that is a dynamic mic element, no resistor should be used.
> If it is an electret type, the normal 5.6k resistor should work fine, it is 
> not critical - anything between 5.6k and 10k will do fine.
> 
> 73,
> Don W3FPR
> 
>> On 7/26/2020 7:01 PM, Steve Dyer W1SRD via Elecraft wrote:
>> Is anyone using this mic element with the K2? If so, what size resistor did 
>> you use between MIC pin 1 and 6?
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Re: [Elecraft] K3s: microphone connector 8V current

[Grant Youngman]

I have the same question about the current available for the 8V at the mic 
connector.  Is it limited to 10ma, or will it actually support a somewhat 
higher continuous current draw safely.  Not just for the k3, but also the K4.

Grant NQ5T


> On Jul 26, 2020, at 7:46 PM, Don Wilhelm  wrote:
> 
> Henk,
> 
> If indeed it is for a mic preamp, then try it without the preamp.  The K3S 
> has 2 stages of mic AF gain.  Normal for the usual ham mics, and a Hi level 
> for low gain mic elements.
> 
> You must turn on bias to have the 8 volts appear at the mic jack.  Do not use 
> with direct connection of a dynamic mic - it makes the mic 'sound funny'.
> 
> 73,
> Don W3FPR
> 
> On 7/26/2020 5:40 PM, Nr4c wrote:
>> What are you going to use this  voltage for? I think it’s for a mic preamp. 
>> It is not the source of bias for an electret mic. That comes on the mic pin 
>> when turned On in the menu.
> __

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Re: [Elecraft] K3s: microphone connector 8V current

[Don Wilhelm]

Henk,

If indeed it is for a mic preamp, then try it without the preamp.  The 
K3S has 2 stages of mic AF gain.  Normal for the usual ham mics, and a 
Hi level for low gain mic elements.


You must turn on bias to have the 8 volts appear at the mic jack.  Do 
not use with direct connection of a dynamic mic - it makes the mic 
'sound funny'.


73,
Don W3FPR

On 7/26/2020 5:40 PM, Nr4c wrote:

What are you going to use this  voltage for? I think it’s for a mic preamp. It 
is not the source of bias for an electret mic. That comes on the mic pin when 
turned On in the menu.


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Re: [Elecraft] Radiosport MH-350ADJ with K2?

[Don Wilhelm]

Steve,

I am not familiar with that particular mic element, but --

If that is a dynamic mic element, no resistor should be used.
If it is an electret type, the normal 5.6k resistor should work fine, it 
is not critical - anything between 5.6k and 10k will do fine.


73,
Don W3FPR

On 7/26/2020 7:01 PM, Steve Dyer W1SRD via Elecraft wrote:
Is anyone using this mic element with the K2? If so, what size resistor 
did you use between MIC pin 1 and 6?

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[Elecraft] Radiosport MH-350ADJ with K2?

[Steve Dyer W1SRD via Elecraft]

Is anyone using this mic element with the K2? If so, what size resistor 
did you use between MIC pin 1 and 6?

TU/73,
Steve
W1SRD
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Re: [Elecraft] Elecraft CW Net Announcement

[Rick NK7I]

The reading I've done says only one radial is required; that the 
'favoring' in the direction of the radial is not enough to be worried 
about; that there is no cancellation from opposing (or just more) 
radials.  I have used a single radial ground plane and found this to be 
true (at 6' over dirt on 80M).  It favors a morning net 800 miles away, 
yet worked DX in any other direction easily (then I moved to a rotating 
dipole at 60' which beats it out).  That ground plane easily beat out a 
horizontal dipole I used before them all (fixed, in the 'wrong' angle 
because of tree location).


Both the radiator and radial are tuned (equally), but the angle of 
difference from dipole to the traditional 90 deg ground plane will cause 
the resistance to vary (roughly 72 ohms as a dipole, dropping to ~50 
ohms when at 90 degrees),  So if another angle is chosen (inverted Y), 
to match a 50 ohm feedline (to have a 1:1 SWR), the element lengths are 
adjusted equally until that match is made; altering the resonance of the 
wires (maximum transfer of energy).  And inverted Y antenna would be 
between that 50-72 ohm range, still acceptably low SWR to not mess with.


Which again, is not a significant variance, so put it up, try it out and 
compare to other antennas.  Wire is cheap enough to play with and try 
things out.


Modeling will demonstrate the pattern and 'take off' angles quite 
clearly; reality is often different because of local objects, ground 
resistance, height...


Don't forget to add a common mode current choke at the feed.

73,
Rick NK7I



On 7/26/2020 11:57 AM, Don Wilhelm wrote:

Fred,

That would be correct if they are oriented at 180 degrees from each 
other so as to cancel the horizontal radiation.  Elevated radials must 
be tuned to be effective, but only 2 are needed.  How much tuning will 
depend on the height above ground.


73,
Don W3FPR

On 7/26/2020 2:36 PM, Fred Jensen wrote:

Ground Plane?

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/25/2020 8:20 PM, kevinr wrote:



   An antenna design is stuck in my head.  It consists of three 
legs, each 1/4 wavelength long.  One leg is vertical while the two 
radials are 120 degrees below it.  The two radials are connected 
electrically while the vertical leg is fed separately.  If it had 
more radials it would be called a 1/4 wave vertical.  But the one 
stuck in my head has elevated radials and only two of them.  I 
cannot remember what this antenna is called.  I know 'inverted Y 
antenna' doesn't work as a search term.  Does anyone know what this 
is usually called so I can use a better search string?  The low take 
off angle would be nice.  It looks like a 20 or 40 meter version 
would be easy to build and raise.



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Re: [Elecraft] K3S in QRP mode

[Nr4c]

It set it back to bare min CONFIG. Uninstalling all you installed options. You 
have on filter, no KPA3, no ATU, etc. download the kit assembly manual from 
Elecraft and go thru the Unstallation of each option. 

I don’t know why owners jump to a EEINIT to solve problems.  There are less 
distructive ways. Starting with restoring a saved good CONFIG file

And reloading latest firmware. 

Sent from my iPhone
...nr4c. bill


> On Jul 26, 2020, at 3:42 PM, Bill DeVore  wrote:
> 
> I recently did a Parameter Initialization on my K3S. I didn’t save the 
> current firmware configuration as I’ve never done any custom programming on 
> the radio.
> 
> After performing the initialization, a full rotation of the Power knob only 
> goes from 0 to a maximum of 12 w on any band. Prior to the initialization of 
> the rig, I could adjust power all the way to a max of 110w on each band.
> 
> Did the initialization set the rig in QRP mode? I sure hope there’s a 
> configuration menu somewhere that I can change to get the radio back to full 
> power.
> 
> Bill - W3PNM
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Re: [Elecraft] K3s: microphone connector 8V current

[Nr4c]

What are you going to use this  voltage for? I think it’s for a mic preamp. It 
is not the source of bias for an electret mic. That comes on the mic pin when 
turned On in the menu. 

Sent from my iPhone
...nr4c. bill


> On Jul 26, 2020, at 2:57 PM, Henk de Vries  wrote:
> 
> Hi all,
> At the K3s microphone connector the 8V output (pin 6) is specified at 10 mA 
> max.However a UA78M08CDC voltage regulator - which is directly connected to 
> +12V - provides the voltage/current to this pin.The UA78M08CDC is specified 
> at 500 mA max.
> Is there any reason why a current of approx. 50 mA could not be drawn from 
> pin 6?
> 73 HenkPA0C
> Henk
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Re: [Elecraft] Elecraft CW Net Announcement

[George Kidder]

I use one just like this on 30M, and have always thought of it as a 
ground plane.  The drooping radials give a good match to 50 ohms.


73 - George, W3HBM

On 7/26/2020 2:36 PM, Fred Jensen wrote:
[This message came from an external source. If suspicious, report to 
ab...@ilstu.edu]


Ground Plane?

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/25/2020 8:20 PM, kevinr wrote:



   An antenna design is stuck in my head.  It consists of three legs,
each 1/4 wavelength long.  One leg is vertical while the two radials
are 120 degrees below it.  The two radials are connected electrically
while the vertical leg is fed separately.  If it had more radials it
would be called a 1/4 wave vertical.  But the one stuck in my head has
elevated radials and only two of them.  I cannot remember what this
antenna is called.  I know 'inverted Y antenna' doesn't work as a
search term.  Does anyone know what this is usually called so I can
use a better search string?  The low take off angle would be nice.  It
looks like a 20 or 40 meter version would be easy to build and raise.


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[Elecraft] 2M Module for K3

[Ronnie Hull]

Howdy y’all
I’m still looking for a 2M module for my K3 if anyone has one and other? What? 
Stabilizer or some such that goes with the 2M module do you can use it on CW 
and SSB

Thanks
Ronnie W5SUM

w5...@comcast.net
Sent from my iPhone
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Re: [Elecraft] K3S in QRP mode

[Dick Dievendorff]

Parameter init sets the configuration to a default setting, which discards the 
configuration of optional modules, including KPA3 and all installed crystal 
filters.  These can all be changed with either a front panel config menu 
choice, some find it easier to use the K3 Utility for crystal filter setup.  
Your owners manual has details on the config menu choices. You may need to 
remove the top cover if you don’t recall what filters are installed; frequently 
there is a paper sticker on the inside of the top cover that helps.

Elecraft may be able to provide a config save file taken when the radio was 
constructed, if it came as a factory unit.  
Contact support with your radio’s serial number.

73 de Dick, K6KR

> On Jul 26, 2020, at 12:42, Bill DeVore  wrote:
> 
> I recently did a Parameter Initialization on my K3S. I didn’t save the 
> current firmware configuration as I’ve never done any custom programming on 
> the radio.
> 
> After performing the initialization, a full rotation of the Power knob only 
> goes from 0 to a maximum of 12 w on any band. Prior to the initialization of 
> the rig, I could adjust power all the way to a max of 110w on each band.
> 
> Did the initialization set the rig in QRP mode? I sure hope there’s a 
> configuration menu somewhere that I can change to get the radio back to full 
> power.
> 
> Bill - W3PNM
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Re: [Elecraft] K3S in QRP mode

[Jim Rhodes]

Check that the KPA3 is turned on to "nor" in the config menu. (Just don't
ask me how I know.)


On Sun, Jul 26, 2020 at 2:41 PM Bill DeVore  wrote:

> I recently did a Parameter Initialization on my K3S. I didn’t save the
> current firmware configuration as I’ve never done any custom programming on
> the radio.
>
> After performing the initialization, a full rotation of the Power knob
> only goes from 0 to a maximum of 12 w on any band. Prior to the
> initialization of the rig, I could adjust power all the way to a max of
> 110w on each band.
>
> Did the initialization set the rig in QRP mode? I sure hope there’s a
> configuration menu somewhere that I can change to get the radio back to
> full power.
>
> Bill - W3PNM
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-- 
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j...@rhodesend.net
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Re: [Elecraft] K3S in QRP mode

[Alan - G4GNX]

The setting for the PA module is probably re-set to NOT INSTALLED.

73,

Alan. G4GNX


-- Original Message --
From: "Bill DeVore" 
To: elecraft@mailman.qth.net
Sent: 26/07/2020 20:39:51
Subject: [Elecraft] K3S in QRP mode


I recently did a Parameter Initialization on my K3S. I didn’t save the current 
firmware configuration as I’ve never done any custom programming on the radio.

After performing the initialization, a full rotation of the Power knob only 
goes from 0 to a maximum of 12 w on any band. Prior to the initialization of 
the rig, I could adjust power all the way to a max of 110w on each band.

Did the initialization set the rig in QRP mode? I sure hope there’s a 
configuration menu somewhere that I can change to get the radio back to full 
power.

Bill - W3PNM
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[Elecraft] K3S in QRP mode

[Bill DeVore]

I recently did a Parameter Initialization on my K3S. I didn’t save the current 
firmware configuration as I’ve never done any custom programming on the radio.

After performing the initialization, a full rotation of the Power knob only 
goes from 0 to a maximum of 12 w on any band. Prior to the initialization of 
the rig, I could adjust power all the way to a max of 110w on each band.

Did the initialization set the rig in QRP mode? I sure hope there’s a 
configuration menu somewhere that I can change to get the radio back to full 
power.

Bill - W3PNM
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Re: [Elecraft] Elecraft CW Net Announcement

[Don Wilhelm]

Fred,

That would be correct if they are oriented at 180 degrees from each 
other so as to cancel the horizontal radiation.  Elevated radials must 
be tuned to be effective, but only 2 are needed.  How much tuning will 
depend on the height above ground.


73,
Don W3FPR

On 7/26/2020 2:36 PM, Fred Jensen wrote:

Ground Plane?

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/25/2020 8:20 PM, kevinr wrote:



   An antenna design is stuck in my head.  It consists of three legs, 
each 1/4 wavelength long.  One leg is vertical while the two radials 
are 120 degrees below it.  The two radials are connected electrically 
while the vertical leg is fed separately.  If it had more radials it 
would be called a 1/4 wave vertical.  But the one stuck in my head has 
elevated radials and only two of them.  I cannot remember what this 
antenna is called.  I know 'inverted Y antenna' doesn't work as a 
search term.  Does anyone know what this is usually called so I can 
use a better search string?  The low take off angle would be nice.  It 
looks like a 20 or 40 meter version would be easy to build and raise.



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[Elecraft] K3s: microphone connector 8V current

[Henk de Vries]

Hi all,
At the K3s microphone connector the 8V output (pin 6) is specified at 10 mA 
max.However a UA78M08CDC voltage regulator - which is directly connected to 
+12V - provides the voltage/current to this pin.The UA78M08CDC is specified at 
500 mA max.
Is there any reason why a current of approx. 50 mA could not be drawn from pin 
6?
73 HenkPA0C
Henk
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Re: [Elecraft] Elecraft CW Net Announcement

[Fred Jensen]

Ground Plane?

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/25/2020 8:20 PM, kevinr wrote:



   An antenna design is stuck in my head.  It consists of three legs, 
each 1/4 wavelength long.  One leg is vertical while the two radials 
are 120 degrees below it.  The two radials are connected electrically 
while the vertical leg is fed separately.  If it had more radials it 
would be called a 1/4 wave vertical.  But the one stuck in my head has 
elevated radials and only two of them.  I cannot remember what this 
antenna is called.  I know 'inverted Y antenna' doesn't work as a 
search term.  Does anyone know what this is usually called so I can 
use a better search string?  The low take off angle would be nice.  It 
looks like a 20 or 40 meter version would be easy to build and raise.


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[Elecraft] FS - 13 kHz FM filter for K3 / K3s

[Robert Brown via Elecraft]

Excellent condition Elecraft / Inrad FM filter for K3 / K3s, $110/shipped.  Bob 
Brown,  N1CVX

Sent from my iPad
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Re: [Elecraft] Earpads Shedding

[Byron Servies]

Hi,

I bought a set of these for my oldest set of CM500's and they are very
comfortable. Thanks for the suggestion.

73, Byron N6NUL

On Wed, May 6, 2020 at 11:33 AM Tom Morehouse via Elecraft
 wrote:
>
> Here’s my solution:
> Garfield Headphone Softie Earpad Covers (Black, Pair) $17.00
>
>
> from B&H: 
> https://www.bhphotovideo.com/c/product/368310-REG/Garfield_SGARHS1_Headphone_Softie_Earpad.html
>  
> 
>
> Works well…
> 73
>
> Tom K4AEN
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-- 
- Northern California Contest Club
- CU in the Cal QSO Party 3-4 Oct 2020
- www.cqp.org
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Re: [Elecraft] sidetone problem

[Don Wilhelm]

Cris,

In that case, you have firmware 2.04R which locks the sidetone source at 
U8-4.
Is your K2 Serial number below 3000?  If so you must do the sidetone 
source wiring changes as shown in the KIO2 or KPA100 manual.


If SN3000 or above, you have a problem that needs to be found.  Do you 
have an oscilloscope to aid in troubleshooting?


73,
Don W3FPR

On 7/26/2020 12:18 PM, Christophe aufacf wrote:

hello sorry for the delay,
I didn't have the time, look at the lack of time

stl regler 030, I press on display I have U8-4 but impossible to switch to U8-25

thank you for your opinion

thank you again for your precious help

73 , Cris F8ACF

Le lun. 20 juil. 2020 à 22:56, Don Wilhelm  a écrit :

Christophe,

You likely do not have the proper sidetone source selected.
Go to the STL menu and set the parameter to about 30 - then tap DISPLAY
to toggle between U6-25 and U8-4.  Stop when you hear sidetone and exit
the menu.

73,
Don W3FPR

On 7/20/2020 3:50 PM, Christophe aufacf wrote:

Good morning all ,

I repaired my K2 with Don recently the problem now

I realized that I can handle in Cw but I no longer have at the same
time the sound of the CW of course in emission

the STL 030 menu, whatever the level, nothing changes, any idea?






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Re: [Elecraft] K2 K2/100 post FD review

[Mike Kopacki]

So I’m just gonna say this:

He’s Don the Mon (that’s Spanish for ‘man’)!

Thanks,
Mike NJ2OM 

> On Jul 26, 2020, at 10:54 AM, Don Wilhelm  wrote:
> 
> Mike,
> 
> That is good news - it sounds like you are back in business with the K2/100.
> 
> 73,
> Don W3FPR
> 
>> On 7/25/2020 12:19 PM, Mike Kopacki wrote:
>> Well, Don, it looks like the problem were the finals. I’m getting over 100 
>> watts on all bands except 10 meters where I’m getting 94.
>> 
>> I can’t thank you enough for helping me. I wouldn’t have been able to track 
>> it down without your help!
>> 
>> Maybe our paths will cross some day and I can buy you a beer!
>> 
>> I will post a final update to the forum.
>> 
>> Thanks,
>> Mike NJ2OM
>> 
 On Jul 25, 2020, at 9:23 AM, Don Wilhelm  wrote:
>>> 
>>> Mike,
>>> 
>>> If your R50 is a half watt resistor, there should be no need to replace it.
>>> 
>>> 73,
>>> Don W3FPR
>>> 
 On 7/25/2020 8:07 AM, Mike Kopacki wrote:
 Good morning, Don.
 
 The PAkit includes a replacement for R50. Should I replace that?
 
 Thanks,
 Mike NJ2OM
 
>> On Jul 21, 2020, at 5:56 PM, Don Wilhelm  wrote:
> Mike,
> 
> I am just trying to determine if the PA transistors are the original 
> Mitsubishi or the batch that Elecraft ordered after Mitsubishi stopped 
> making them.  The originals did not have to be matched, and the batch 
> after that were initially not matched - I found that the Hfe varied 
> greatly resulting in many PA transistor failures, and after that finding, 
> they were matched by Elecraft.
> 
> So if the PA transistors you took out were marked as Mitsubishi, they may 
> have been OK, but early 2000's says that they may have been the 
> mismatched transistor pair.  I can't recall the year I discovered that 
> problem - it was likely 2008 or so.
> 
> I suspect yours may be in the time after the Mitsubishi and were not 
> matched at the time.
> 
> 73,
> Don W3FPR
> 
>> On 7/21/2020 5:33 PM, Mike Kopacki wrote:
>> I probably built it in the early 2000’s. But I’ve been off the air for a 
>> good 15 years.
>> 
>> What are you thinking?
>> 
>> Thanks,
>> Mike NJ2OM
>> 
 On Jul 21, 2020, at 4:01 PM, Don Wilhelm  
 wrote:
>>> Mike,
>>> 
>>> Good, but if the new PA transistors don't fix it,  there is not much 
>>> more to check in the PA circuit.
>>> How old is this K2?
>>> 
>>> 73,
>>> Don W3FPR
>>> 
 On 7/21/2020 3:57 PM, Mike Kopacki wrote:
 I got an email from Elecraft right after I sent you the voltages, 
 saying the PAkit has been shipped. So I’m keeping my fingers crossed 
 that a new set of transistors will fix it.
 
 Thanks,
 Mike NJ2OM
 
>> On Jul 21, 2020, at 2:42 PM, Don Wilhelm  
>> wrote:
> Mike,
> 
> That is good - right where it needs to be.
> I would still replace Q7 and Q8.  From all the measurements you made, 
> they appear to be weak at higher frequencies.
> I sure don't know why that should be so, but it apparently is true.
> 
> 73,
> Don W3FPR
> 
>> On 7/21/2020 2:33 PM, Mike Kopacki wrote:
>> Haha, my bad again!  It’s .625v!
>> 
>> Thanks,
>> Mike NJ2OM
>> 
 On Jul 21, 2020, at 12:29 PM, Don Wilhelm  
 wrote:
>>> Mike,
>>> 
>>> Did you misplace the decimal?  It should be between 0.60 and 0.64 
>>> volts.
>>> If it really is over 6 volts, then you have a problem with Q11 and 
>>> Q13.
>>> 
>>> There are few methods to reliably test those transistors at RF 
>>> levels.
>>> 
>>> 73,
>>> Don W3FPR
>>> 
 On 7/21/2020 11:41 AM, Mike Kopacki wrote:
 Q7 & Q8 removed.
 
 DC voltage, measured from the Base pads of both Q7 & Q8 during 
 TUNE, is 6.25V for both.
 
 If you then believe Q7 and/or Q8 are bad, is there a way to check 
 them when out of the circuit?
 
 Elecraft has not yet shipped the PAkit.
 
 Thanks,
 Mike NJ2OM
 
>> On Jul 19, 2020, at 5:38 PM, Don Wilhelm 
>>  wrote:
> Mike,
> 
> If Q11 and Q13 are smack down on the board, to change them, crush 
> the transistor bodies Pliers, cutters, anything that works - 
> there should be enough lead left to pull it out of the hole.
> 
> 73,
> Don W3FPR
> 
>> On 7/19/2020 5:32 PM, Mike Kopacki wrote:
>> I will try to desolder them first, in case it’s Q11 & Q13 that’s 
>> bad. If I 

Re: [Elecraft] sidetone problem

[Christophe aufacf]

hello sorry for the delay,
I didn't have the time, look at the lack of time

stl regler 030, I press on display I have U8-4 but impossible to switch to U8-25

thank you for your opinion

thank you again for your precious help

73 , Cris F8ACF

Le lun. 20 juil. 2020 à 22:56, Don Wilhelm  a écrit :
>
> Christophe,
>
> You likely do not have the proper sidetone source selected.
> Go to the STL menu and set the parameter to about 30 - then tap DISPLAY
> to toggle between U6-25 and U8-4.  Stop when you hear sidetone and exit
> the menu.
>
> 73,
> Don W3FPR
>
> On 7/20/2020 3:50 PM, Christophe aufacf wrote:
> > Good morning all ,
> >
> > I repaired my K2 with Don recently the problem now
> >
> > I realized that I can handle in Cw but I no longer have at the same
> > time the sound of the CW of course in emission
> >
> > the STL 030 menu, whatever the level, nothing changes, any idea?
> >



-- 
73 , F8ACF56
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Re: [Elecraft] K2 RF power fluctuate

[Don Wilhelm]

Barry,

The TUNE power is not as tightly controlled by the firmware as normal CW 
keying.
That was done as an aid to those using manual antenna tuners.  The K2 
normally tries to keep the power steady at the requested power.


73,
Don W3FPR

On 7/26/2020 11:21 AM, barry halterman wrote:

Greetings. I just completed my K2 build and the RX works great. Wish I
would have done this years ago. One issue I noticed with the transmitter is
that when I press the tune button, the output power will either be above or
below the power control setting. I found this during the transmitter
alignment phase of the build.
If I have the output power set for 2 watts, I get 2.8 or 1.6. if I have the
output set at 10 watts I get 9 or 5 watts. I am using an external watt
meter and I verified that the voltage to the K2 is around 13.6 volts. This
occurs on all bands by the way.

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[Elecraft] K2 RF power fluctuate

[barry halterman]

Greetings. I just completed my K2 build and the RX works great. Wish I
would have done this years ago. One issue I noticed with the transmitter is
that when I press the tune button, the output power will either be above or
below the power control setting. I found this during the transmitter
alignment phase of the build.
If I have the output power set for 2 watts, I get 2.8 or 1.6. if I have the
output set at 10 watts I get 9 or 5 watts. I am using an external watt
meter and I verified that the voltage to the K2 is around 13.6 volts. This
occurs on all bands by the way.
I have checked RF voltages back to the control board at Q8 Valc and found
that the output voltage , at this point, varies by a few tenths of a mv,
thus changing the drive power down the line, changing the output power that
changes the Valc output. Round robin situation!!
Anyone have a similar situation?
Thanks
Barry
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[Elecraft] For Sale: K3/100 s/n 2578

[Roger D Johnson]

Has virtually all options except VHF converters and KBPF3 on aux receiver.
6, 2.7 and 0.5 kHz filters in main RX; 2.7 and 0.5 hHz filters in aux RX.

Went back to Mothership in Jul 2016 for TLC and upgrades.

Please contact me directly with any questions: n...@roadrunner.com

Asking $2500 plus shipping

73, Roger

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