Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[Randy Farmer]

Yup, I did specify "good", not "great" isolation for the Top Ten 
switches. I'm aware of their limitations. I agree that it's always 
desirable to have 70+ dB port-to-port isolation if you can get it (and 
afford it), but depending on the application it's certainly not always 
necessary. During the phase of my career when I was involved in cellular 
base station RF system design, in which performance was always balanced 
with cost (and guess which one won if push came to shove), I learned to 
do balanced designs that made sure no component was over-specified. This 
experience has carried through to my HF station design.


In my particular case, I'm switching TX bandpass filters that supplement 
the main BPF at the output of the radio to suppress harmonics and noise 
from the amplifier. There's a pair of the Top Ten 2-ways at the input 
and output ports of the TX BPF bank that lets me share a single bank of 
filters between two radios. The filter banks are switched by a 2X6 
switch matrix at each end that has around 60 dB port-to-port isolation. 
The bandpass filters themselves have about 80 dB worst case adjacent 
band isolation, so assuming the I/O switches each have 60 dB or so of 
isolation, that's theoretically -120 dB leakage contributed by the 
selector switches. This leakage is thus about 40 dB down from the worst 
case BPF rejection, therefore negligible.Even if the total switch 
isolation were only 80dB, this would mean the additional power 
contributed from switch leakage would increase the total coupling (and 
therefore decrease the isolation) by only 3 dB. The 2-way switches are 
used to either enable the TX filter bank for the contest bands or bypass 
it for the WARC bands. So putting a 2-way switch with mediocre isolation 
on each I/O port of the selector switches has no effect on system 
performance in the contest bands. Actually, even though the whole 
network is wired with LMR-240 the coax shielding is probably the 
limiting factor for total station-to-station isolation anyhow. I agree 
that there are places where excellent isolation is required, and should 
be specified. Like you, I used to use a WX0B SixPak, but many years ago 
I replaced with a microHAM Double Ten switch, which has isolation 
similar to the 4O3A switch, for this reason.


As for VSWR effects, I've learned long ago that attempting to make 
complex RF systems involving filters and multiple switching points over 
the almost 4 octaves of the HF to 6 meter range look like 50 + j0 on 
every band is an essentially impossible endeavor. Fortunately, 
well-designed transmitters these days are not overly sensitive to 
moderate VSWR loads; as long as there's not a really bad mismatch 
somewhere in the system they should take normal mismatches in stride.


The OP was inquiring about switches that are suitable to switch multiple 
radios to one amplifier input, which implies that only one radio at a 
time will be active. For that the Top Ten switches are plenty good enough.


73...
Randy, W8FN

On 2/17/2019 8:57 PM, Jim Brown wrote:

On 2/17/2019 6:26 PM, Randy Farmer wrote:
I concur with the comments on the Top Ten 2-way switches. I'm using 
about 10 of them at various places in my SO2R contest station antenna 
and BPF switching networks. They work well and have good isolation. I


On the basis of my measurements with a Vector Network Analyzer, I am 
NOT impressed with these switches, and consider them poorly designed. 
The major design flaw is that they depend upon the chassis for signal 
return, so the signal path gets increasingly badly mismatched at 15M 
and above. I didn't measure crosstalk, but this design error would 
certainly impact it. I reduced the mismatch by about half by adding 
braid from the coax connectors to the circuit board and following (as 
best I could) the signal path to provide a return. Why? Because the 
"ground" layer is broken under the top layer, so it can't act as a 
return either!


Someone cited 50 dB as "good isolation." When I replaced my WX0B 6x2, 
I measured isolation of about 55 dB. The replacement, a 4O3A 6x2, 
measured 75 dB worst case. And other one I'm using now, the 4O3A 
Antenna Genius, measures better than 95 dB worst case.


If you look inside a well designed power amp, you'll see transmission 
line running from input and output for both TX and RX path. My Ten Tec 
Titans were built that way, and so is the KPA500. You'll also see 
mini-coax jumpers tying sections of the K3 together.


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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KPA1500 Power Supply Issue

[Eric Swartz - WA6HHQ, Elecraft]

Looks like Don beat me to the punch.  (I'm reading to slow today ;-)

Thanks Don!

73,
Eric
elecraft.com
_..._



> On Feb 17, 2019, at 4:19 PM, paule408--- via Elecraft 
>  wrote:
> 
> Don, thanks so much for your swift reply and great suggestion. 
> I re-seated the grey control cable and snugged it up and the amp is working 
> fine now!
> Problem solved! (Cockpit error)
> 
> Thanks all, 
> Paul N6PSE
>On Sunday, February 17, 2019, 3:53:59 PM PST, Don Wilhelm 
>  wrote:  
> 
> Paul,
> 
> Be certain the control cable between the KPA1500 RF deck and the power 
> supply is seated properly and the jackscrews tightened.  The fact that 
> the KPA1500 power switch does nothing is an indicator that the cable may 
> have some problem.
> 
> 73,
> Don W3FPR
> 
>> On 2/17/2019 6:41 PM, paule408--- via Elecraft wrote:
>> Last August, I had my KPA1500 repaired by Elecraft as one PA transistor 
>> failed. They replaced both PA transistors and sent it back to me under 
>> warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply 
>> stayed home unplugged during this time,.
>> I kept using my backup Amp until today when I removed the KPA1500 from the 
>> box and installed it in my shack. I connected everything up and connected 
>> the power supply to my 220v outlet.
>> Upon powering up the Power Supply, only the AC On green LED lights. Nothing 
>> from the HV Supply or LV Supply LEDs on the power supply. The RF deck does 
>> not power on.
>> I have re-seated the heavy red/black cables several times as well as 
>> unplugged and plugged in the power supply several times, however the power 
>> supply does not seem to provide power to the RF deck.
>> Before I pack it up and ship it back to Elecraft, is there anything else 
>> that I should check?
>> Thanks,
>> Paul N6PSE
> 
> __
> 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
> Message delivered to eric.swa...@elecraft.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KPA1500 Power Supply Issue

[Eric Swartz WA6HHQ - Elecraft]

Hi Paul,

If the green AC light is on and the  PS 50V LED is not coming on when you try 
to power up the amp from the RF deck front panel it indicates that the two 
boxes are not talking. 

It sounds like the control cable between the amp and PS is not fully seated. 
Try unscrewing it on both ends and re inserting it firmly without depending on 
the screws to pull it in tightly. 

As an early field tester for the amp I suspect you may have one of the early 
pre-release control cables that had slightly long screws and may not seat fully 
if  you relied on screwing it in to seat it.  In any case, we can also get you 
a new cable to try after we are back in the office Tuesday. 

73,
Eric
elecraft.com
---
Sent from my iPhone 6S

> On Feb 17, 2019, at 3:41 PM, paule408--- via Elecraft 
>  wrote:
> 
> Last August, I had my KPA1500 repaired by Elecraft as one PA transistor 
> failed. They replaced both PA transistors and sent it back to me under 
> warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply 
> stayed home unplugged during this time,. 
> I kept using my backup Amp until today when I removed the KPA1500 from the 
> box and installed it in my shack. I connected everything up and connected the 
> power supply to my 220v outlet. 
> Upon powering up the Power Supply, only the AC On green LED lights. Nothing 
> from the HV Supply or LV Supply LEDs on the power supply. The RF deck does 
> not power on. 
> I have re-seated the heavy red/black cables several times as well as 
> unplugged and plugged in the power supply several times, however the power 
> supply does not seem to provide power to the RF deck. 
> Before I pack it up and ship it back to Elecraft, is there anything else that 
> I should check?
> Thanks, 
> Paul N6PSE
> 
> __
> 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
> Message delivered to eric.swa...@elecraft.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[Jim Brown]

On 2/17/2019 6:26 PM, Randy Farmer wrote:
I concur with the comments on the Top Ten 2-way switches. I'm using 
about 10 of them at various places in my SO2R contest station antenna 
and BPF switching networks. They work well and have good isolation. I


On the basis of my measurements with a Vector Network Analyzer, I am NOT 
impressed with these switches, and consider them poorly designed. The 
major design flaw is that they depend upon the chassis for signal 
return, so the signal path gets increasingly badly mismatched at 15M and 
above. I didn't measure crosstalk, but this design error would certainly 
impact it. I reduced the mismatch by about half by adding braid from the 
coax connectors to the circuit board and following (as best I could) the 
signal path to provide a return. Why? Because the "ground" layer is 
broken under the top layer, so it can't act as a return either!


Someone cited 50 dB as "good isolation." When I replaced my WX0B 6x2, I 
measured isolation of about 55 dB. The replacement, a 4O3A 6x2, measured 
75 dB worst case. And other one I'm using now, the 4O3A Antenna Genius, 
measures better than 95 dB worst case.


If you look inside a well designed power amp, you'll see transmission 
line running from input and output for both TX and RX path. My Ten Tec 
Titans were built that way, and so is the KPA500. You'll also see 
mini-coax jumpers tying sections of the K3 together.


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
Message delivered to arch...@mail-archive.com

[Elecraft] Looking for a way to switch an antenna input to the KAT500

[john]

The Top Ten box just has relays connecting between the input and one of six
outputs. There is no reason that you could not use it in reverse, six radios
driving one antenna. I use Top Ten relay on my expeditions automatically
controlled by their band decoder which is connected to my K3S.

John KK9A


Tom elecraft.list at videotron.ca 


Hi,

Yes this looks interesting as does the ones from Dewey. It seems that top
ten devices also has a 6 antenna to 1 radio switch.  Anyone know if it can
operate the other way around? 6 radios to one antenna (kat500)?

73 Tom

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[Randy Farmer]

I concur with the comments on the Top Ten 2-way switches. I'm using 
about 10 of them at various places in my SO2R contest station antenna 
and BPF switching networks. They work well and have good isolation. I'm 
also using a 6-way for RX antenna switching. It's simply one port 
switched to one of six, so it will work just fine either way. RF doesn't 
care which way it goes through relays. A nice benefit of the Top Ten 
switches is that they're internally interlocked, so it's electrically 
impossible to select more than one port-to-port configuration at a time.


73...
Randy, W8FN

On 2/17/2019 6:55 PM, Tom wrote:

Hi,

Yes this looks interesting as does the ones from Dewey. It seems that top
ten devices also has a 6 antenna to 1 radio switch.  Anyone know if it can
operate the other way around? 6 radios to one antenna (kat500)?

73 Tom

  


From: John Simmons 
Sent: February 17, 2019 5:10 PM
To: Jack Brindle 
Cc: Tom ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Looking for a way to switch an antenna input to the
KAT500

  


Jack,

Thanks for bringing this to my attention... it is just what I have been
looking for to switch between my main and remote operated stations!

73,
-John NI0K




Jack Brindle via Elecraft 

Sunday, February 17, 2019 3:59 PM

TopTen has a nice A/B switch with pretty good isolation characteristics.
See: https://toptendevices.com/products/ab-station-selector/


It requires a 12V signal for switching, I believe.

Array Solutions also sells some devices that may be of interest.

73!
Jack, W6fB


__
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
Message delivered to jasimm...@pinewooddata.com


Tom 

Sunday, February 17, 2019 2:30 PM

Hi,
I use a Kat500 with my K3 and KX3. However, I have a number of other radios
which I would like to use with the Kat500. So I'm looking for a antenna
switch that can change inputs in some way based on an electronic signal. The
signal can be via serial device, or network doesn't matter. Anyone know of
such a programmable switch?
Thanks, Tom
Va2fsq.com

-Original Message-
From: elecraft-boun...@mailman.qth.net

 
On Behalf Of Bob McGraw K4TAX
Sent: February 17, 2019 3:06 PM
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] Coax Switches

Smart man and decisions and the way to do things correctly. Glad to see
this.

73

Bob, K4TAX


__
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 Message
delivered to elecraft.l...@videotron.ca 


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
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
Message delivered to jasimm...@pinewooddata.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
Message delivered to w...@tx.rr.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
Message delivered to arch...@mail-archive.com

[Elecraft] Elecraft CW Net Report

[kevinr]

Good Evening,

   Forty meters was contesters up and down the dial.  And then it all 
went quiet.  I ran the forty meter net for 28 minutes and worked a nice 
group of people.  A few of them fresh from the contest others not so 
fresh after hours of snow moving.  The report of good food in New 
Orleans was unsurprising but did bring back some fond memories.  Crazy 
drivers in the snow seems normal for some reason.  When I learned how to 
drive in Wisconsin we would go to large, empty, snow covered parking 
lots to practice how to recover from skids.  I don't think they teach 
that out here.


  On 7047 kHz at z:

K0DTJ - Brian - CA

KG7V - Marv - WA

K4TO - Dave - KY

K6XK - Roy - IA

K6PJV - Dale - CA

W0CZ - Ken - ND

W8OV - Dave - TX


Only two more weeks left in February; hopefully that means spring is coming.

   Until next week 73,

   Kevin.  KD5ONS

-

Down dropt the breeze, the sails dropt down,
'Twas sad as sad could be;
And we did speak only to break
The silence of the sea!

All in a hot and copper sky,
The bloody Sun, at noon,
Right up above the mast did stand,
No bigger than the Moon.

Day after day, day after day,
We stuck, nor breath nor motion;
As idle as a painted ship
Upon a painted ocean.

Water, water, every where,
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.

_

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[Tom]

Hi,

Yes this looks interesting as does the ones from Dewey. It seems that top
ten devices also has a 6 antenna to 1 radio switch.  Anyone know if it can
operate the other way around? 6 radios to one antenna (kat500)?

73 Tom

 

From: John Simmons  
Sent: February 17, 2019 5:10 PM
To: Jack Brindle 
Cc: Tom ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Looking for a way to switch an antenna input to the
KAT500

 

Jack,

Thanks for bringing this to my attention... it is just what I have been
looking for to switch between my main and remote operated stations!

73,
-John NI0K




Jack Brindle via Elecraft  

Sunday, February 17, 2019 3:59 PM

TopTen has a nice A/B switch with pretty good isolation characteristics.
See: https://toptendevices.com/products/ab-station-selector/


It requires a 12V signal for switching, I believe.

Array Solutions also sells some devices that may be of interest.

73!
Jack, W6fB


__
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
Message delivered to jasimm...@pinewooddata.com
 

Tom  

Sunday, February 17, 2019 2:30 PM

Hi,
I use a Kat500 with my K3 and KX3. However, I have a number of other radios
which I would like to use with the Kat500. So I'm looking for a antenna
switch that can change inputs in some way based on an electronic signal. The
signal can be via serial device, or network doesn't matter. Anyone know of
such a programmable switch? 
Thanks, Tom
Va2fsq.com

-Original Message-
From: elecraft-boun...@mailman.qth.net

 
On Behalf Of Bob McGraw K4TAX
Sent: February 17, 2019 3:06 PM
To: elecraft@mailman.qth.net  
Subject: Re: [Elecraft] Coax Switches

Smart man and decisions and the way to do things correctly. Glad to see
this.

73

Bob, K4TAX


__
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 Message
delivered to elecraft.l...@videotron.ca  


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
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
Message delivered to jasimm...@pinewooddata.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[John Simmons]

Jack,

Thanks for bringing this to my attention... it is just what I have been 
looking for to switch between my main and remote operated stations!


73,
-John NI0K


Jack Brindle via Elecraft 
Sunday, February 17, 2019 3:59 PM
TopTen has a nice A/B switch with pretty good isolation 
characteristics. See: 
https://toptendevices.com/products/ab-station-selector/ 


It requires a 12V signal for switching, I believe.

Array Solutions also sells some devices that may be of interest.

73!
Jack, W6fB


__
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
Message delivered to jasimm...@pinewooddata.com
Tom 
Sunday, February 17, 2019 2:30 PM
Hi,
I use a Kat500 with my K3 and KX3. However, I have a number of other 
radios which I would like to use with the Kat500. So I'm looking for a 
antenna switch that can change inputs in some way based on an 
electronic signal. The signal can be via serial device, or network 
doesn't matter. Anyone know of such a programmable switch?

Thanks, Tom
Va2fsq.com

-Original Message-
From: elecraft-boun...@mailman.qth.net 
 On Behalf Of Bob McGraw K4TAX

Sent: February 17, 2019 3:06 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Coax Switches

Smart man and decisions and the way to do things correctly. Glad to 
see this.


73

Bob, K4TAX


__
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 
Message delivered to elecraft.l...@videotron.ca



---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
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
Message delivered to jasimm...@pinewooddata.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KPA1500 Power Supply Issue

[paule408--- via Elecraft]

 Don, thanks so much for your swift reply and great suggestion. 
I re-seated the grey control cable and snugged it up and the amp is working 
fine now!
Problem solved! (Cockpit error)

Thanks all, 
Paul N6PSE
On Sunday, February 17, 2019, 3:53:59 PM PST, Don Wilhelm 
 wrote:  
 
 Paul,

Be certain the control cable between the KPA1500 RF deck and the power 
supply is seated properly and the jackscrews tightened.  The fact that 
the KPA1500 power switch does nothing is an indicator that the cable may 
have some problem.

73,
Don W3FPR

On 2/17/2019 6:41 PM, paule408--- via Elecraft wrote:
> Last August, I had my KPA1500 repaired by Elecraft as one PA transistor 
> failed. They replaced both PA transistors and sent it back to me under 
> warranty. Only the RF deck was shipped to Elecraft. The KPA1500 power supply 
> stayed home unplugged during this time,.
> I kept using my backup Amp until today when I removed the KPA1500 from the 
> box and installed it in my shack. I connected everything up and connected the 
> power supply to my 220v outlet.
> Upon powering up the Power Supply, only the AC On green LED lights. Nothing 
> from the HV Supply or LV Supply LEDs on the power supply. The RF deck does 
> not power on.
> I have re-seated the heavy red/black cables several times as well as 
> unplugged and plugged in the power supply several times, however the power 
> supply does not seem to provide power to the RF deck.
> Before I pack it up and ship it back to Elecraft, is there anything else that 
> I should check?
> Thanks,
> Paul N6PSE
  
__
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
Message delivered to arch...@mail-archive.com

[Elecraft] P3 Hub Support?

[Harry Yingst via Elecraft]

Does the P3 have (or are there plans to add) support for a USB hub on the P3?
This would be very handy for those who want to have a Keypad and a Keyboard 
connected to the P3.

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KPA1500 Power Supply Issue

[Don Wilhelm]

Paul,

Be certain the control cable between the KPA1500 RF deck and the power 
supply is seated properly and the jackscrews tightened.  The fact that 
the KPA1500 power switch does nothing is an indicator that the cable may 
have some problem.


73,
Don W3FPR

On 2/17/2019 6:41 PM, paule408--- via Elecraft wrote:

Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. 
They replaced both PA transistors and sent it back to me under warranty. Only 
the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home 
unplugged during this time,.
I kept using my backup Amp until today when I removed the KPA1500 from the box 
and installed it in my shack. I connected everything up and connected the power 
supply to my 220v outlet.
Upon powering up the Power Supply, only the AC On green LED lights. Nothing 
from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not 
power on.
I have re-seated the heavy red/black cables several times as well as unplugged 
and plugged in the power supply several times, however the power supply does 
not seem to provide power to the RF deck.
Before I pack it up and ship it back to Elecraft, is there anything else that I 
should check?
Thanks,
Paul N6PSE

__
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
Message delivered to arch...@mail-archive.com

[Elecraft] KPA1500 Power Supply Issue

[paule408--- via Elecraft]

Last August, I had my KPA1500 repaired by Elecraft as one PA transistor failed. 
They replaced both PA transistors and sent it back to me under warranty. Only 
the RF deck was shipped to Elecraft. The KPA1500 power supply stayed home 
unplugged during this time,. 
I kept using my backup Amp until today when I removed the KPA1500 from the box 
and installed it in my shack. I connected everything up and connected the power 
supply to my 220v outlet. 
Upon powering up the Power Supply, only the AC On green LED lights. Nothing 
from the HV Supply or LV Supply LEDs on the power supply. The RF deck does not 
power on. 
I have re-seated the heavy red/black cables several times as well as unplugged 
and plugged in the power supply several times, however the power supply does 
not seem to provide power to the RF deck. 
Before I pack it up and ship it back to Elecraft, is there anything else that I 
should check?
Thanks, 
Paul N6PSE

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] low pass filters

[Don Wilhelm]

A low-pass filter will not change RFI either coming into the shack or 
going out.  There are low-pass filters in all transceivers produced by 
Elecraft (and most other manufacturers), and they are in both the 
transmit and receive path.
The current FCC requirement is for the 2nd harmonic be suppressed by 43 
dB over the fundamental.
Low pass filters come from a past era when the FCC requirements were not 
as stringent and TVs responded to those higher order harmonics from 
amateur transmitters.  That is no longer the case.


Considering receive, we do have many sources of unintentional radiation 
which is present in the HF spectrum, and other than locating and having 
the offending device turned off, there is not much we can do about it. 
Although if it is interfering with licensed operation, there is recourse 
by cooperation with the FCC.  The products giving problems range from 
inexpensive switching power sources (read wall-warts) to control 
circuits in many household appliances and other consumer devices, and 
even some lighting products.


If you are operating in an environment like Field Day where there are 
multiple transmitters operating in close proximity, bandpass filters and 
single band antennas are the normal "cure" as well as physical 
separation of the antennas.


73,
Don W3FPR



On 2/17/2019 5:59 PM, Richards wrote:
Good day -   What is the consensus concerning low-pass filters to 
minimize RFI both coming in and going out  of the shack?   Is there a 
type or size, brand or model that comes highly recommended?  Is it 
prudent to employ one, regardless of whether or not there is a known, 
identified problem , i.e., just in case?  Does it assist reception as 
well as transmission?



__
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
Message delivered to arch...@mail-archive.com

[Elecraft] low pass filters

[Richards]

Good day -   What is the consensus concerning low-pass filters to 
minimize RFI both coming in and going out  of the shack?   Is there a 
type or size, brand or model that comes highly recommended?  Is it 
prudent to employ one, regardless of whether or not there is a known, 
identified problem , i.e., just in case?  Does it assist reception as 
well as transmission?


What is the real world skinny?

K8JHR
__
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
Message delivered to arch...@mail-archive.com

[Elecraft] Elecrat SSB net 2-17-2019

[Eric Lanzl]

Here is the list of stations checking in to the net today. I hope I got the 
calls and serial numbers correct. Thanks for checking in.

Elecraft SSB Net 2-17-2019

WB9JNZ     Eric  IL K3    4017    Net control

NC0JW   Jim  CO   KX3 1356    Relay station

K9YEQ    Bill   WI   K3S 11130

N6JW/M  John    CA    KX3     515 bicycle mobile

N4NRW  Roger  SC K3    1318    Relay station

K8NU/7   Carl OH    FT 2000   operatinga remote station 
in Washington State

WA0BEU    Keith    CO       KX3 7248

KO5V  Jim  TX     K2    7225

AI6B    Brian    CA   KX3 3084

AE6JV Bill   CA   K2    6299

W7QHD  Kurt     AZ     K2/100 1538 

N0MPM  Mile IA   K3S 10514

WW4JF   John    TN     K3S 11177

W7REK   Glenn  AZ        K3    2843

K1NW Brian    RI      K3    4974  Relay station

W0IK   Larry    CO    K3S 11558

KG5WEO    Tom TX      KX3 10175

W1NGA  Al CO    K3    5765

NS7P  Phil  OR    K3    1826    Relaystation

KB6DE    Dan WA    K3    8614

K6SBA    David   CA     K3    565

ZL1PWD Peter   NZ      K3    139

W4DML   Doug   TN     K3    6433

K6VWE   Stan MI    K3    650

K7JG   John    WA   KX3 3519
__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[Jack Brindle via Elecraft]

TopTen has a nice A/B switch with pretty good isolation characteristics. See: 
https://toptendevices.com/products/ab-station-selector/ 

It requires a 12V signal for switching, I believe.

Array Solutions also sells some devices that may be of interest.

73!
Jack, W6fB

> On Feb 17, 2019, at 12:30 PM, Tom  wrote:
> 
> Hi,
> I use a Kat500 with my K3 and KX3.  However, I have a number of other radios 
> which I would like to use with the Kat500.  So I'm looking for a antenna 
> switch that can change inputs in some way based on an electronic signal.  The 
> signal can be via serial device, or network doesn't matter.  Anyone know of 
> such a programmable switch? 
> Thanks, Tom
> Va2fsq.com
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net  On 
> Behalf Of Bob McGraw K4TAX
> Sent: February 17, 2019 3:06 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Coax Switches
> 
> Smart man and decisions and the way to do things correctly.  Glad to see this.
> 
> 73
> 
> Bob, K4TAX
> 
> 
> On 2/17/2019 9:38 AM, James F. Boehner MD via Elecraft wrote:
>> I  use the Alpha Delta Series.  They have SO-239 and "N" connector models, 
>> two position or four position.  For the price difference, I always get four 
>> position.
>> 
>> They are not only well built switches, but they do have surge protection 
>> (gas) with a replaceable pill.  Their best feature is the very high 
>> isolation they offer:
>> 
>> 30 MHz  >60 dB
>> 150 MHz >50 dB
>> 450 MHz 50 dB
>> 
>> And dB Loss:
>> 
>> 30 MHz  0.1 dB
>> 150 MHz 0.15 dB
>> 450 MHz 0.5 dB
>> 
>> So, I wish these could be remotable.  However, they are the best switches 
>> I've found for a reasonable price, and I have many of them in my station.
>> 
>> Oh yes, on the outside of my house, I have polyphasers.
>> 
>> '73 de JIM N2ZZ
>> 
>> 
>> 
>> I do use a number of Daiwa 2-position coax switches for various 
>> purposes. Any comments on coax switches?
>> 
>> Bill W2BLC K-Line
>> 
>> 
> 
> __
> 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 Message 
> delivered to elecraft.l...@videotron.ca
> 
> 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> 
> __
> 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
> Message delivered to jackbrin...@me.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Coax Switches / dBm & W in python

[W2xj]

I generally do DBs in my head. Just remember with power 3 db=2X,  6db-4X, 
7DB=5X and 10 db=10X. It scales from there. Every 10 db is a factor of 10. 60 
db is a factor of one million. Just divide 1500 by a million.  

For voltage the scale doubles so 20 db is 10X, 6 db is 2X, etc. 

Sent from my iPad

> On Feb 17, 2019, at 4:22 PM, Mike Markowski  wrote:
> 
> At work (RF lab), dBm power units let a feeble-minded engineer :-) use 
> plus/minus rather than times/divide with Watts for calculations.
> 
> For isolation and other calculations in the ham shack where Watts are used, a 
> few python one-liners useful.  (Python is free and runs on Windows, Mac, 
> linux.)  When in python, copy the following:
> 
> from math import *
> w2dbm = lambda x: 10 * log10(x/10) + 30
> dbm2w = lambda x: 10 ** ((x-30)/10)
> iso = lambda pwr_W, iso_dB: dbm2w(w2dbm(pwr_W) - iso_dB)
> 
> and now something like
> 
> >>> iso(1500, 60)
> 0.001500
> 
> tells you that 1500 W with 60 dB isolation leaks 1.5 mW to the other port.
> 
> 73,
> Mike ab3ap
> 
>> On 2/17/19 10:38 AM, James F. Boehner MD via Elecraft wrote:
>> I  use the Alpha Delta Series.  They have SO-239 and "N" connector
>> models, two position or four position.  For the price difference, I
>> always get four position.
>> They are not only well built switches, but they do have surge
>> protection (gas) with a replaceable pill.  Their best feature is the
>> very high isolation they offer:
>> 30 MHz  >60 dB 150 MHz >50 dB 450 MHz 50 dB
>> And dB Loss:
>> 30 MHz  0.1 dB 150 MHz 0.15 dB 450 MHz 0.5 dB
>> So, I wish these could be remotable.  However, they are the best
>> switches I've found for a reasonable price, and I have many of them
>> in my station.
>> Oh yes, on the outside of my house, I have polyphasers.
>> '73 de JIM N2ZZ
>> I do use a number of Daiwa 2-position coax switches for various purposes. 
>> Any comments on coax switches?
>> Bill W2BLC K-Line
>> __ 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 Message delivered to
>> mike.ab...@gmail.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
> Message delivered to w...@w2xj.net
> 

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Coax Switches / dBm & W in python

[Mike Markowski]

On 2/17/19 4:32 PM, Andy Durbin wrote:

"
from math import *
w2dbm = lambda x: 10 * log10(x/10) + 30
dbm2w = lambda x: 10 ** ((x-30)/10)
iso = lambda pwr_W, iso_dB: dbm2w(w2dbm(pwr_W) - iso_dB)

and now something like

  >>> iso(1500, 60)
0.001500

tells you that 1500 W with 60 dB isolation leaks 1.5 mW to the other port."

Does dividing 1,500 by 10 to the power of 6 really need a computer and a Python 
script?  Why not just move the decimal point 6 times?

73,
Andy, k3wyc


Bad example. :-)  Use messier numbers.  General shack use for quick 
conversions is the point.


73,
Mike ab3ap
__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Coax Switches / dBm & W in python

[bill]

Thanks for the math stuff! 'Specially that last line. Good to know.

Also, some emails asked where I get/what is a slip on PL259. Go here:

https://www.rfparts.com/rfp530.html

May be others, but that is where I got my newest ones.

Bill W2BLC K-Line


__
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
Message delivered to arch...@mail-archive.com

[Elecraft] Coax Switches / dBm & W in python

[Andy Durbin]

"
from math import *
w2dbm = lambda x: 10 * log10(x/10) + 30
dbm2w = lambda x: 10 ** ((x-30)/10)
iso = lambda pwr_W, iso_dB: dbm2w(w2dbm(pwr_W) - iso_dB)

and now something like

 >>> iso(1500, 60)
0.001500

tells you that 1500 W with 60 dB isolation leaks 1.5 mW to the other port."

Does dividing 1,500 by 10 to the power of 6 really need a computer and a Python 
script?  Why not just move the decimal point 6 times?

73,
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Coax Switches / dBm & W in python

[Mike Markowski]

At work (RF lab), dBm power units let a feeble-minded engineer :-) use 
plus/minus rather than times/divide with Watts for calculations.


For isolation and other calculations in the ham shack where Watts are 
used, a few python one-liners useful.  (Python is free and runs on 
Windows, Mac, linux.)  When in python, copy the following:


from math import *
w2dbm = lambda x: 10 * log10(x/10) + 30
dbm2w = lambda x: 10 ** ((x-30)/10)
iso = lambda pwr_W, iso_dB: dbm2w(w2dbm(pwr_W) - iso_dB)

and now something like

>>> iso(1500, 60)
0.001500

tells you that 1500 W with 60 dB isolation leaks 1.5 mW to the other port.

73,
Mike ab3ap

On 2/17/19 10:38 AM, James F. Boehner MD via Elecraft wrote:

I  use the Alpha Delta Series.  They have SO-239 and "N" connector
models, two position or four position.  For the price difference, I
always get four position.

They are not only well built switches, but they do have surge
protection (gas) with a replaceable pill.  Their best feature is the
very high isolation they offer:

30 MHz  >60 dB 150 MHz >50 dB 450 MHz 50 dB

And dB Loss:

30 MHz  0.1 dB 150 MHz 0.15 dB 450 MHz 0.5 dB

So, I wish these could be remotable.  However, they are the best
switches I've found for a reasonable price, and I have many of them
in my station.

Oh yes, on the outside of my house, I have polyphasers.

'73 de JIM N2ZZ



I do use a number of Daiwa 2-position coax switches for various 
purposes. Any comments on coax switches?


Bill W2BLC K-Line




__ 
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 Message delivered to
mike.ab...@gmail.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Coax Switches

[WW3S]

+1 , just 2 position here

Sent from my iPad

> On Feb 17, 2019, at 10:38 AM, James F. Boehner MD via Elecraft 
>  wrote:
> 
> I  use the Alpha Delta Series.  They have SO-239 and "N" connector models, 
> two position or four position.  For the price difference, I always get four 
> position.
> 
> They are not only well built switches, but they do have surge protection 
> (gas) with a replaceable pill.  Their best feature is the very high isolation 
> they offer:
> 
> 30 MHz  >60 dB
> 150 MHz >50 dB
> 450 MHz 50 dB 
> 
> And dB Loss:
> 
> 30 MHz  0.1 dB
> 150 MHz 0.15 dB
> 450 MHz 0.5 dB
> 
> So, I wish these could be remotable.  However, they are the best switches 
> I've found for a reasonable price, and I have many of them in my station.
> 
> Oh yes, on the outside of my house, I have polyphasers.
> 
> '73 de JIM N2ZZ
> 
> 
> 
> I do use a number of Daiwa 2-position coax switches for various 
> purposes. Any comments on coax switches?
> 
> Bill W2BLC K-Line
> 
> 
> 
> 
> __
> 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
> Message delivered to w...@zoominternet.net

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Looking for a way to switch an antenna input to the KAT500

[W2xj]

https://www.dowkey.com/product-category/coaxial-switches/

Sent from my iPad

> On Feb 17, 2019, at 3:30 PM, Tom  wrote:
> 
> Hi,
> I use a Kat500 with my K3 and KX3.  However, I have a number of other radios 
> which I would like to use with the Kat500.  So I'm looking for a antenna 
> switch that can change inputs in some way based on an electronic signal.  The 
> signal can be via serial device, or network doesn't matter.  Anyone know of 
> such a programmable switch? 
> Thanks, Tom
> Va2fsq.com
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net  On 
> Behalf Of Bob McGraw K4TAX
> Sent: February 17, 2019 3:06 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Coax Switches
> 
> Smart man and decisions and the way to do things correctly.  Glad to see this.
> 
> 73
> 
> Bob, K4TAX
> 
> 
>> On 2/17/2019 9:38 AM, James F. Boehner MD via Elecraft wrote:
>> I  use the Alpha Delta Series.  They have SO-239 and "N" connector models, 
>> two position or four position.  For the price difference, I always get four 
>> position.
>> 
>> They are not only well built switches, but they do have surge protection 
>> (gas) with a replaceable pill.  Their best feature is the very high 
>> isolation they offer:
>> 
>> 30 MHz  >60 dB
>> 150 MHz >50 dB
>> 450 MHz 50 dB
>> 
>> And dB Loss:
>> 
>> 30 MHz  0.1 dB
>> 150 MHz 0.15 dB
>> 450 MHz 0.5 dB
>> 
>> So, I wish these could be remotable.  However, they are the best switches 
>> I've found for a reasonable price, and I have many of them in my station.
>> 
>> Oh yes, on the outside of my house, I have polyphasers.
>> 
>> '73 de JIM N2ZZ
>> 
>> 
>> 
>> I do use a number of Daiwa 2-position coax switches for various 
>> purposes. Any comments on coax switches?
>> 
>> Bill W2BLC K-Line
>> 
>> 
> 
> __
> 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 Message 
> delivered to elecraft.l...@videotron.ca
> 
> 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> 
> __
> 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
> Message delivered to w...@w2xj.net
> 
__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Slip on adapters on PL259s

[ny9h]

I soldered metal hose clamps with handles,  onto the quick plugs.

1 turn on the handle and odd it comes...
Times 5 cables plus rotor cablr5

Sent from Xfinity Connect Application

-Original Message-

From: b...@w2blc.net
To: elecraft@mailman.qth.net
Sent: 2019-02-17 9:24:33 AM 
Subject: [Elecraft] Slip on adapters on PL259s

Here comes the flames:  I use slip on adapters on my PL259s that connect 
my rigs/tuners/etc. to the outside world on my bulkhead. I have been 
using this method for over 30 years and NEVER had a connector associated 
failure. It allows for quick connect/disconnect when shutting down for 
thunderstorm related issues. I use RG8X for all indoor coax duties and 
run the KPA500 - so no power levels requiring heavier cable. I do snug 
PL259s on equipment slightly with pliers.

Fact is, the only coax failure I have had of recent note, was the poor 
quality patch cable between the P3 and K3. It was long ago replaced with 
a Mil Spec cable from my junk box.

I do use a number of Daiwa 2-position coax switches for various 
purposes. Any comments on coax switches?

Bill W2BLC K-Line


__
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
Message delivered to n...@arrl.net__
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
Message delivered to arch...@mail-archive.com

[Elecraft] Looking for a way to switch an antenna input to the KAT500

[Tom]

Hi,
I use a Kat500 with my K3 and KX3.  However, I have a number of other radios 
which I would like to use with the Kat500.  So I'm looking for a antenna switch 
that can change inputs in some way based on an electronic signal.  The signal 
can be via serial device, or network doesn't matter.  Anyone know of such a 
programmable switch? 
Thanks, Tom
Va2fsq.com

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Bob McGraw K4TAX
Sent: February 17, 2019 3:06 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Coax Switches

Smart man and decisions and the way to do things correctly.  Glad to see this.

73

Bob, K4TAX


On 2/17/2019 9:38 AM, James F. Boehner MD via Elecraft wrote:
> I  use the Alpha Delta Series.  They have SO-239 and "N" connector models, 
> two position or four position.  For the price difference, I always get four 
> position.
>
> They are not only well built switches, but they do have surge protection 
> (gas) with a replaceable pill.  Their best feature is the very high isolation 
> they offer:
>
> 30 MHz  >60 dB
> 150 MHz >50 dB
> 450 MHz 50 dB
>
> And dB Loss:
>
> 30 MHz  0.1 dB
> 150 MHz 0.15 dB
> 450 MHz 0.5 dB
>
> So, I wish these could be remotable.  However, they are the best switches 
> I've found for a reasonable price, and I have many of them in my station.
>
> Oh yes, on the outside of my house, I have polyphasers.
>
> '73 de JIM N2ZZ
>
>
>
> I do use a number of Daiwa 2-position coax switches for various 
> purposes. Any comments on coax switches?
>
> Bill W2BLC K-Line
>
>

__
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 Message 
delivered to elecraft.l...@videotron.ca


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Coax Switches

[Bob McGraw K4TAX]

Smart man and decisions and the way to do things correctly.  Glad to see 
this.


73

Bob, K4TAX


On 2/17/2019 9:38 AM, James F. Boehner MD via Elecraft wrote:

I  use the Alpha Delta Series.  They have SO-239 and "N" connector models, two 
position or four position.  For the price difference, I always get four position.

They are not only well built switches, but they do have surge protection (gas) 
with a replaceable pill.  Their best feature is the very high isolation they 
offer:

30 MHz  >60 dB
150 MHz >50 dB
450 MHz 50 dB

And dB Loss:

30 MHz  0.1 dB
150 MHz 0.15 dB
450 MHz 0.5 dB

So, I wish these could be remotable.  However, they are the best switches I've 
found for a reasonable price, and I have many of them in my station.

Oh yes, on the outside of my house, I have polyphasers.

'73 de JIM N2ZZ



I do use a number of Daiwa 2-position coax switches for various
purposes. Any comments on coax switches?

Bill W2BLC K-Line




__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Clock battery in K3

[Dauer, Edward]

Thanks, George.  Since sending my earlier post I checked the date -- and it's 
off by 19 years.  It shows a date in '00.  I bought the rig in '13.  From that 
I'll bet the power to the calendar and the clock both just went out for a while 
and they reset to their defaults.

The Manual seems to say that the battery is used when the rig isn't powered on, 
which would explain a battery drain quicker than usual for me, though there is 
some ambiguity in the text.  Your experience suggests that may be right -- 
unless my rig experienced some other kind of problem.  The manual also says the 
battery should last two to ten years depending on the type of battery, with no 
mention of usage -- sort of wide error bars, methinks.

Cheers,

Ted, KN1CBR


On 2/17/19, 11:43 AM, "Kidder, George"  wrote:

Hi Ted,

My K3, built in September 2010, is still on its original battery, and 
keeping good time.  It is on about 12 hours a day, though - and I don't 
know if the clock runs on 12V when it is on, which would save the 
battery.  I hardly ever look at the clock, however, so maybe that is the 
difference!

George, W3HBM


__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Slip on adapters on PL259s

[Gmail - George]

Bill,
We used the "slip-ons" to have quick reconfiguration of monitors on a live 
remote (TV) truck when we were still using UHF connectors for video.
We had no failures that I remember - remote live trucks live in a very 
hostile environment!

We used the UHF slip-ons until the conversion to BNCs beginning in the early 
70s

73
George   AI4VZ

-Original Message- 
From: bill

Here comes the flames:  I use slip on adapters on my PL259s that connect
my rigs/tuners/etc. to the outside world on my bulkhead. I have been
using this method for over 30 years and NEVER had a connector associated
failure. It allows for quick connect/disconnect when shutting down for
thunderstorm related issues. I use RG8X for all indoor coax duties and
run the KPA500 - so no power levels requiring heavier cable. I do snug
PL259s on equipment slightly with pliers.

Fact is, the only coax failure I have had of recent note, was the poor
quality patch cable between the P3 and K3. It was long ago replaced with
a Mil Spec cable from my junk box.

I do use a number of Daiwa 2-position coax switches for various
purposes. Any comments on coax switches?

Bill W2BLC K-Line

__
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
Message delivered to arch...@mail-archive.com

[Elecraft] K3 Internal Battery and Clock, and one more K2 for sale

[Dauer, Edward]

Any experience with how long the K3’s internal battery should go before 
replacement?

My K3, assembled in late 2013, lost six hours on the clock over the last couple 
of weeks.  After correction it seems to be running well enough, but I wonder if 
this is an indication that the internal battery is due for replacement.  I 
would rather not open the case unless I have to.

In case it matters I leave the K3 powered off for weeks at a time – but I 
believe the internal battery is not rechargeable so that shouldn’t be the 
culprit . . .

In addition, I still have one K2/10 for sale as a result of my downsizing 
program.  Inquiries off-list, please.

Tnx, as always . . .

Ted, KN1CBR


__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Antennas for portable ops

[Rick Robinson]

I really like the Par HF omni’s. Mono band but so easy to swap out and swr
adjustment is so easy a caveman can do it. And they work great. I bought a
long gun case and store all the elements, band modules,coax, balun, and
tools. Just grab and go. No hiking, just drive up locations for these old
bones. Read EHam reviews and check Pars site for more info.

On Sat, Feb 16, 2019 at 11:19 PM Steve via Elecraft <
elecraft@mailman.qth.net> wrote:

> I just bought a KX-3 so I have a couple questions about antennas. I
> would like suggestions for man portable and portable fixed. I have
> received suggestions for end fed antennas for fixed ops but will
> entertain others. Thanks Steve kb1chu
>
> __
> 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
> Message delivered to rickw...@gmail.com
>
-- 
Rick Genesis 1-29
__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Removing/connecting PL-259s

[Eric Swartz - WA6HHQ, Elecraft]

Folks, let's close the PL259 threads now in the interest of reducing list email 
overload for the rest of our readers. 

73,
Eric
moderator, even on my days off..
elecraft.com
_..._

> On Feb 17, 2019, at 8:58 AM,   wrote:
> 
> I had that happen once too many years ago with an Amphenol PL-259.  Since
> then I make sure that they fit together before soldering!
> 
> John KK9A
__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] PL-259 threads closed.

[Eric Swartz - WA6HHQ, Elecraft]

Folks, let's close the PL259 threads now in the interest of reducing list email 
overload for the rest of our readers. 

73,
Eric
moderator, even on my days off..
elecraft.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Removing/connecting PL-259s

[john]

I had that happen once too many years ago with an Amphenol PL-259.  Since
then I make sure that they fit together before soldering!

John KK9A


Drew AF2Z wrote:
 

No, a bit paranoid perhaps but I disconnect the rig entirely, including 
p/s cable. It's not too bad since I'm mostly a CW operator and don't 
usually have a lot of other peripherals, SDR, computer, etc. connected 
to the K3.

BTW, I don't trust the Amphenol name particularly after getting a bad 
plug that wouldn't thread correctly (only realized after soldering the 
thing on the coax and trying to use it. Arggh!). Amphenol is offshore 
product now.

73,
Drew
AF2Z

__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] New KPA500/KAT500 question

[Dave Cole (NK7Z)]

Thanks Don, that was what I needed to hear on your first post.  After I 
figured out that nothing goes through the P3 from the K3 to the KAT500, 
things made a lot more sense...


What a nice setup I have now...  I will be selling my ALS-1306, and 
Palstar HF-AUTO as a result of getting this little amp...  Three db 
difference is nothing to worry about, so 500 watts is great...  Got a 
chance to use it today on the EU opening on 20...  How nice it is in 
CW...  I have never run full break-in, over the past 50 years of being a 
ham...  Should have tried it long ago!  :)


Thank you for the help!

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 2/17/19 6:29 AM, Don Wilhelm wrote:

Dave,

I see that you have it figured out.

As to your question - the K3 and P3 connect together using the IF out 
coax and the RS-232 connection.


The KAT500/KPA500 connect using the AUX cable - that is no 
interconnection between the P3 and the KAT500/KPA500, they are entirely 
separate.


73,
Don W3FPR

On 2/16/2019 9:06 PM, Dave Cole (NK7Z) wrote:




Can you expand on:

"There is no relationship between the K3 and P3 for considerations 
with the amplifier and ATU."


What does this mean exactly?


__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Antennas for portable ops

[Mike Morrow]

Steve,

For portable ops from a fixed location, consider a multi-band (through use of 
insulator links) resonant dipole.

High-performance antennas for camping and backpacking have been my principal 
interest in ham radio for 50 years.  Upon request, I can send a pdf file that 
describes a seven-band (40m to 10m) dipole that is easy and inexpensive to 
make, and durable for frequent set-up and take-down. I have used it in one form 
or another with great success for almost 40 years.

Mike / KK5F
DSW-20, -30, -40 1998
K1 #175 2000
KX2 #2211 2017

-Original Message-

>I just bought a KX-3 so I have a couple questions about antennas. I 
>would like suggestions for man portable and portable fixed. I have 
>received suggestions for end fed antennas for fixed ops but will 
>entertain others. Thanks Steve kb1chu
__
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
Message delivered to arch...@mail-archive.com

[Elecraft] Coax Switches

[James F. Boehner MD via Elecraft]

I  use the Alpha Delta Series.  They have SO-239 and "N" connector models, two 
position or four position.  For the price difference, I always get four 
position.

They are not only well built switches, but they do have surge protection (gas) 
with a replaceable pill.  Their best feature is the very high isolation they 
offer:

30 MHz  >60 dB
150 MHz >50 dB
450 MHz 50 dB 

And dB Loss:

30 MHz  0.1 dB
150 MHz 0.15 dB
450 MHz 0.5 dB

So, I wish these could be remotable.  However, they are the best switches I've 
found for a reasonable price, and I have many of them in my station.

Oh yes, on the outside of my house, I have polyphasers.

'73 de JIM N2ZZ



I do use a number of Daiwa 2-position coax switches for various 
purposes. Any comments on coax switches?

Bill W2BLC K-Line




__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Slip on adapters on PL259s

[John Simmons]

Yeah! I have a Daiwa CS401 that I wanted to use to switch an antenna 
between to K3s. The isolation is so poor that 95 watts from one radio 
activates the high RF receive level on the other. Substituting a DELTA-4 
solved the problem.


73,
-John NI0K

bill wrote on 2/17/2019 8:23 AM:
Here comes the flames:  I use slip on adapters on my PL259s that 
connect my rigs/tuners/etc. to the outside world on my bulkhead. I 
have been using this method for over 30 years and NEVER had a 
connector associated failure. It allows for quick connect/disconnect 
when shutting down for thunderstorm related issues. I use RG8X for all 
indoor coax duties and run the KPA500 - so no power levels requiring 
heavier cable. I do snug PL259s on equipment slightly with pliers.


Fact is, the only coax failure I have had of recent note, was the poor 
quality patch cable between the P3 and K3. It was long ago replaced 
with a Mil Spec cable from my junk box.


I do use a number of Daiwa 2-position coax switches for various 
purposes. Any comments on coax switches?


Bill W2BLC K-Line


__
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
Message delivered to jasimm...@pinewooddata.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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] New KPA500/KAT500 question

[Don Wilhelm]

Dave,

I see that you have it figured out.

As to your question - the K3 and P3 connect together using the IF out 
coax and the RS-232 connection.


The KAT500/KPA500 connect using the AUX cable - that is no 
interconnection between the P3 and the KAT500/KPA500, they are entirely 
separate.


73,
Don W3FPR

On 2/16/2019 9:06 PM, Dave Cole (NK7Z) wrote:




Can you expand on:

"There is no relationship between the K3 and P3 for considerations with 
the amplifier and ATU."


What does this mean exactly?


__
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
Message delivered to arch...@mail-archive.com

[Elecraft] Slip on adapters on PL259s

[bill]

Here comes the flames:  I use slip on adapters on my PL259s that connect 
my rigs/tuners/etc. to the outside world on my bulkhead. I have been 
using this method for over 30 years and NEVER had a connector associated 
failure. It allows for quick connect/disconnect when shutting down for 
thunderstorm related issues. I use RG8X for all indoor coax duties and 
run the KPA500 - so no power levels requiring heavier cable. I do snug 
PL259s on equipment slightly with pliers.


Fact is, the only coax failure I have had of recent note, was the poor 
quality patch cable between the P3 and K3. It was long ago replaced with 
a Mil Spec cable from my junk box.


I do use a number of Daiwa 2-position coax switches for various 
purposes. Any comments on coax switches?


Bill W2BLC K-Line


__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] KPA-1500 failed!

[Drew AF2Z]

Stiction of non lubricated threads can give a false sense of tight 
connection. PL259/SO239 in particular can have poor contact through the 
ground conductors while the thread seems tight.


When the threads are lubricated stiction does not occur and hand 
tightening always ensures that the front ring of the plug is butted 
against the mating surface on the SO239; and that the rear lip of the 
shell is firmly butted against the short threaded section at the back of 
the plug. These two narrow ring surfaces with relatively small contact 
area are essential to good ground connection in the PL259.


73,
Drew
AF2Z




On 02/16/19 23:22, Jim Brown wrote:

On 2/16/2019 3:07 PM, Drew AF2Z wrote:
This allows very tight snugging by hand, no need of wrenching. 


What's the logic behind that?

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
Message delivered to pu...@af2z.net



__
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
Message delivered to arch...@mail-archive.com

Re: [Elecraft] Antennas for portable ops

[ny9h]

Two picture examples are on the bottom of my QRZ page. 

1.  Just a wire up into the beach umbrella and over to a 16 foot fiberglass 
pole,with my counterpoise. South Carolina Ocean beach.

2.walking along Grismey Island, in the arctic circle with a mfj whip and 
counterpoise dragging.

Too bad nobody in EU I worked cared about IOTA.


Sent from Xfinity Connect Application

-Original Message-

From: steve...@effable.com
To: elecraft@mailman.qth.net
Sent: 2019-02-17 1:15:16 AM 
Subject: Re: [Elecraft] Antennas for portable ops

On 2/16/19 20:17 PM, Steve via Elecraft wrote:
> I just bought a KX-3 so I have a couple questions about antennas. I
> would like suggestions for man portable and portable fixed. I have
> received suggestions for end fed antennas for fixed ops but will
> entertain others. Thanks Steve kb1chu

It's really a question of how portable you want to be.

Do you want to travel super-light but you've got the luxury of time to
set-up? Or do you want to be able to make contacts when stopped just for
a minute or two? Or do you want to work QSOs while
pedestrian/bicycle/equestrian/etc. mobile?

For my KX2 I use everything from an MFJ multi-band pocket whip, a couple
of pieces of non-resonant-length wire, a magnetic loop, to a 26ga.
20m/40m/80m dipole I deploy on a 10m fiberglass pole.
__
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
Message delivered to n...@arrl.net
__
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
Message delivered to arch...@mail-archive.com