Re: [Elecraft] Silent power supply for a K3s

[Bob Nielsen - N7XY]

The Astrons are quiet and pretty reliable.  I have had a RS20 since 1980 
and the only problem I had was cured by replacing the regulator chip 
about 35 years ago.


Bob, N7XY

On 6/10/19 5:04 PM, Alan Corbeth wrote:

I have an Astron RS35 power Supply purchased in 1991.  There was a period where 
I didn’t use it for ten years.  Now it’s in use daily and so far it continues 
to be totally quiet.

Alan
K7FH


On Jun 10, 2019, at 3:56 AM, Bill  wrote:

I have several Power Werx switchers and prefer them for their size over the 
heavy analog supplies. Fans are not a problem (actually, I hear nothing from 
them at all) - IF you design your radio desk for proper equipment placement. 
Place the power supply at your right hand - and you WILL hear noise, XFMR, fan, 
etc.

It is amazing what proper station design/construction can do for making 
silence. Open faced metal shelving and bare desktops don't cut it.

Just for grins, I put one of those Nanoxia fans in my IC-7300 and silenced it 
completely. Worth the few dollars and effort. No temperature changes noted. 
Hmmm - KPA500?


__
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 acorb...@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 n...@n7xy.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] OT: Metric system

[Bob Nielsen - N7XY]

This was done by many stations when the price of gas first exceeded 
$1.00 per gallon the (all mechanical at the time) pumps couldn't handle 
3 digits.


Bob, N7XY

On 2/25/19 3:08 PM, ab2tc wrote:

Hi again,

Hopefully Eric will find it in his heart to let this thread continue.

Yes, we are. Booze and wine are now sold by the liter. Curiously beer is
generally not. In my opinion gas stations should be the next in line to
convert. I am sure modern pumps could easily be reprogrammed to display
liters instead of gallons. To the uneducated the price per liter would look
like  a bargain. Wow, less than a dollar! I don't think super markets would
encounter a huge cost converting from lbs to kilos either. Probably the road
signage would be the biggest cost problem.

AB2TC - Knut


k6dgw wrote

Yep, we're going metric ... inch by inch.

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County








On 2/25/2019 2:12 PM, Jim Rhodes wrote:

Well we first authorized use of the metric system in 1866, we are working
on getting around to it. Don't rush us!



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:
Elecraft@.qth
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html





--
Sent from: http://elecraft.365791.n2.nabble.com/
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] kpa1500

[Bob Nielsen - N7XY]

As I recall from school, Thomas Jefferson proposed that the U.S. switch 
to the metric system over 300 years ago.  Of course our reactionary 
Congress then, as now, dug in their feet and stopped it cold.


Bob, N7XY

On 2/23/19 7:03 PM, Kevin McQuiggin (SFU) wrote:

Technically, “Celsius” rather then centigrade!

We are more or less used to Deg C in Canada after about 40 years of using it.  
Deg F are still sometimes used though.  Older folks understand both while kids 
have no idea what a yard or a pound is!

Sent from my iPad


On Feb 23, 2019, at 17:43, Bob McGraw K4TAX  wrote:

My KPA500 displays the temperature in degrees Centigrade.   Just remember, 
small numbers cooler, larger numbers hotter.  Normal room temp is about 23 to 
25 degrees C.  The fan switches on at 50, steps up at 55, steps up at 60 and 
steps up at 65.as I recall.  The book says maximum temperature must be 
less than 90 degrees C.   To me, that is all one needs to know about Centigrade.

Just for the record:

23 C = 73.4F

25 C  = 77 F

50 C =  122F

55 C = 131F

60 C = 140F

65 C = 149F

90 C = 194F

Otherwise, [C x 9/5] + 32 = F degrees

73

Bob, K4TAX



On 2/23/2019 4:33 PM, John K4WJ wrote:
I agree. My SPE 2KFA gives me the choice.

de John/K4WJ


On 2/19/2019 12:26 PM, Courtney Judd wrote:
Just a short note to let you know I am really enjoying my KPA1500 it does 
all that is supposed to and more. I do have one suggestion that perhaps you 
could add to the menu would be ability to switch temp from C to F or what ever 
one wants. I personally just not in tune with C deg! Thanks, 73's Cort K4WI
__
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 k...@att.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


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] OT: Totally

[Bob Nielsen - N7XY]

I thought you lived out in the boondocks where traffic wouldn't be an issue.

Bob, N7XY

On 2/22/19 6:18 AM, Wes wrote:
This week it's rodeo days in Tucson.  A favorite of the snowbirds. 
This morning however, it seems the snowbirds brought the snow with 
them.  Yep, it's snowing in Tucson.  Not looking forward to "rush" hour.


Wes N7WS

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Re: [Elecraft] Tuners and spurious responses

[Bob Nielsen, N7XY]

DLW Associates makes a filter which has 40 dB rejection across the 
entire broadcast band.  It is available from DX Engineering.


On 12/22/18 7:20 PM, Al Lorona wrote:

  No, not a null, but a rolloff. When I quoted -40 dB I didn't mean a notch at 
one frequency, but the stopband level reached by the time you get well into the 
broadcast band. So that would be -40 dB on all AM stations below a certain 
frequency.
The K3 is a good receiver, but every receiver has its limits and certainly the 
K3 will suffer once an interfering signal gets above a certain level.
A trap or stub would work, but my point was that it would be unnecessary if 
using a link-coupled tuner. Attenuating a 50 kW station by 40 dB makes it  
sound like a 5 W station.
Al  W6LX




That said, is suppose it IS possible that a tuner/antenna combination
just happened to have a deep null right on the frequency of a nearby
broadcast station



   
__

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...@n7xy.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] wire for random wire antenna using kx3

[Bob Nielsen, N7XY]

I miss good old WIOU.  He had some technical insights which were unique, 
to say the least.


Bob, N7XY

On 12/17/18 11:03 AM, Fred Jensen wrote:

Larson E. Rapp is using an alias now?

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 12/17/2018 7:09 AM, Charlie T wrote:
Yes, but speaker wire is only good for audio up to about 25 kHz.  It 
has a
frequency limiting component in the wire alloy that must be removed 
in order

to use this type wire at RF.

This removal procedure is fairly easy to accomplish.  First, soak the 
wire
in a bucket of laundry detergent and water over night, then remove 
the wire

and rinse it thoroughly.
After assuring the wire is dry, place in an oven set to about 150 
degrees

for about 3 - 4 hours.
In lieu of the oven, you can also place the wire in an afternoon of 
summer

sun.
After that, place the wire on the ground and hold a 2 meter hand-held 
over
the wire, approximately a foot away and key up the radio for 20 
seconds at a

couple watts output.
If you see no reaction, sparking, especially tingling in your ears,  or
physical movement of the wire, it is now safe to use as an antenna.

Note this advice is given freely and may be disseminated with no 
intended

royalty charges or copyright infringements.

73, Charlie k3ICH



__
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...@n7xy.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] Elec raft, will I ever own one ?

[Bob Nielsen, N7XY]

I bought my K3S and KPA500 at 79 and hope to get many years of enjoyment 
from them.


73, Bob N7XY


On 11/16/18 7:49 AM, silve...@charter.net wrote:

I read the daily Elec raft  emails and get enjoyment from the various
comments, and I learn a few things as well. The saddest part is, at soon to
be 80, I wonder if I will ever get to own this excellent transceiver?  I
keep hoping for a time when I will have enough $$ to afford one.

  


73, Dick W1REJ

__
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...@n7xy.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] K3 : Rack Mount Option?

[Bob Nielsen - N7XY]

It's about 16.75 inches wide if you remove the handle and feet from the 
sides of the K3



On 9/21/18 2:36 PM, Clay Autery wrote:

I haven't measured lately...  Is a K3/P3 width too wide for a single 19" 3U 
rack unit?


Sent from my Verizon, Samsung Galaxy smartphone
 Original message From: Jim Rhodes  Date: 9/21/18  11:34  
(GMT-06:00) To: "Petr, OK1RP/M0SIS"  Cc: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] K3 : Rack Mount Option?
Novexcomm.com is all that I have seen. Looks like good stuff, but I haven't
ordered yet.


Jim Rhodes
K0XU

On Fri, Sep 21, 2018, 10:02 Petr, OK1RP/M0SIS  wrote:


Hi,

anything changed from 2007 already? :)

I am looking for 19' rack mount option for KPA500, KAT500, W2 as same as
PSU
and antennas multi-switch etc...

Thanks for info.





-
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to jimk...@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 k...@montac.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 n...@n7xy.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] K2 slug-tuned inductors

[Bob Nielsen - N7XY]

A metal screwdriver might affect the inductance.  There are several 
inexpensive tuning tools made with a plastic handle and a small thin 
metal blade, for example:


https://www.digikey.com/product-detail/en/bourns-inc/H-90/H90-ND/262571

I used a similar tool when I built my K2.

Bob, N7XY

On 9/21/18 7:41 AM, AE0MM via Elecraft wrote:

The green plastic tuning tool is too wide to fit in the slot of the narrow slot 
slug-tuned inductors. Is it safe to use a screwdriver on the small slot 1µH 
inductors?

Thanks,
--mark/ae0mm
__
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...@n7xy.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] Conditions, shmonditions: DXing anyway

[Bob Nielsen - N7XY]

I'm probably a bit psycho at times and studied acoustics in college over 
50 years ago.  Now I need to figure out how to combine the two.


73, Bob N7XY


On 9/20/18 8:07 PM, Wayne Burdick wrote:

On a related topic, I discovered that as a guy of a certain age, 400 Hz may be 
a better pitch for copying weak signals than my usual 550 Hz. This could be a 
well-understood psychoacoustic phenomenon, but it came as a pleasant surprise.



__
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] Enabling FM mode on K3S

[Bob Nielsen - N7XY]

Thanks. It wasn't the answer but got me looking in the right place.  I 
had to set CONFIG/FM MODE to ON.  I thought the setting in K3 Utility 
would handle it but I guess not.


Bob, N7XY


On 9/19/18 4:15 PM, Nr4c wrote:

Must enable FM in CONFIG/ BandMap. Look it up in the big “book”.

Sent from my iPhone
...nr4c. bill



On Sep 19, 2018, at 7:05 PM, Bob Nielsen - N7XY  wrote:

I'm still learning to use my new K3S but am already very impressed with the 
performance.  However, I am unable to switch to the FM mode.  I have installed 
and configured the 13 kHz filter and checked the K3 utility to verify that FM 
is enabled for that filter and that TX FM is enabled, but the mode switch will 
not select the FM mode.  Is there some additional step which I have missed?

Bob, N7XY

__
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...@widomaker.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] Enabling FM mode on K3S

[Bob Nielsen - N7XY]

I'm still learning to use my new K3S but am already very impressed with 
the performance.  However, I am unable to switch to the FM mode.  I have 
installed and configured the 13 kHz filter and checked the K3 utility to 
verify that FM is enabled for that filter and that TX FM is enabled, but 
the mode switch will not select the FM mode.  Is there some additional 
step which I have missed?


Bob, N7XY

__
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] [KX3] Great QSOs, 21st century

[Bob Nielsen, N7XY]

It's been quite a while, but Henry Radio was on Olympic Boulevard at 
that time, not Century.  I  visited there many times.


Bob, N7XY


On 9/14/18 8:38 PM, Robert Friess wrote:

I received my Novice license in 1953 at the age of 11.  I had a NC101X
receiver that my dad bought for me at Henry Radio on Century Blvd in LA for
$60.  While waiting for what seemed like decades for my license to arrive,
I built a 6AG7 crystal oscillator  for my transmitter.  I had one crystal
at 7085.  My license finally arrived and I was officially KN6HMO.  I called
CQ endlessly and no one answered.  I set up schedules with a few locals a
few miles away and they heard me, but no one else.  A few weeks later
someone gave me a 815 dual tetrode.  I went through my junk box and found
enough parts to build an amplifier.  I tested it by listening on my
receiver to make sure that the output was tuned to 40 and not some
harmonic.  The sun went down and I started sending CQ.  A station in Texas
returned my call.  It was a thrill that hasn't been repeated in the
following  65 years.

Bob, N6CM

On Fri, Sep 14, 2018 at 6:29 PM Alan James alanmja...@yahoo.com [KX3] <
kx3-nore...@yahoogroups.com> wrote:



I think it was Winston Churchill.

Alan KZ6B


--
*From:* "Charles Powell doctor...@yahoo.com [KX3]" <
kx3-nore...@yahoogroups.com>
*To:* Wayne Burdick 
*Cc:* Elecraft ; KX3 
*Sent:* Friday, September 14, 2018 3:37 PM
*Subject:* Re: [KX3] Great QSOs, 21st century


Well, S0 noise can be frightening because it makes one think the front end
has gone out on the radio.  But then I’m always duped when the first CW
signal comes in and blasts my ears out.

Today: SFI=69 and SN=0 (yes ZERO), but NEVER let that keep you off the
air.  I had some time this afternoon and managed to work Germany and France
with 5 watts.  Had it not been for QRM, I would have had a nice rag chew
with France.  Unfortunately the QRM kept stepping on my signal (I could
hear him as well.)

Other stations heard today include OJ0DX (Market Reef) and Kuwait.  Had
the other stations been a little more patient, I’m sure I could have worked
both.  I guess they thought they weren’t making enough contacts and moved
on to other bands/modes.

Never give up!  Never say die!  (Who knows the movie quote?)

72,

Charles - NK8O

On Sep 14, 2018, at 2:46 PM, Wayne Burdick n...@elecraft.com [KX3] <
kx3-nore...@yahoogroups.com> wrote:

Wow! Thanks for the nostalgic RF trip, everyone. Seriously...great stories.


Moving forward in time a bit, I wanted to note that RF miracles continue
to happen every day. (Well, most weekends in my case.) Last Saturday’s
physics-be-damned results: several solid SSB QSOs on 20 and 17 meters all
over the country, including KH6, with a prototype AX1 dual-band whip and a
KX2 used HT style.

What I need is an alarm app for my iPhone that tells me that HF conditions
are hot and it’s time to get out of the shack. Ring tone of choice: first
four bars of “Born to be Wild”.

Is it just me, or is there something life-changing about a noise level of
S0? It’s just a short drive away, even in Silicon Valley.

Wayne
N6KR




__._,_.___
--
Posted by: Alan James 
--
Reply via web post

• Reply to sender

• Reply to group

• Start a New Topic

• Messages in this topic

(3)
--
Have you tried the highest rated email app? 
With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email
app on the market. What are you waiting for? Now you can access all your
inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email
again with 1000GB of free cloud storage.
--
Visit Your Group



[image: Yahoo! Groups]

• Privacy  •
Unsubscribe  • Terms
of Use 

SPONSORED LINKS
.

__,_._,___

Re: [Elecraft] Craziest / most rewarding QSOs

[Bob Nielsen - N7XY]

The most rewarding QSO I DIDN'T have:

A few sunspot cycles ago I tuned around 10 meters from my then-QTH in 
California.  The ONLY signal I could hear on the entire band was from a 
beacon station on Reunion Island, very copyable.


73, Bob N7XY
__
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] Data transmission on 30 meters with PX3 problem

[Bob Nielsen, N7XY]

Back in my early days as a ham (1950s), I inadvertently discovered that 
the metal housing of a D104 microphone was very effective in performing 
such a touch test.


Bob, N7XY


On 9/2/18 7:19 AM, John Oppenheimer wrote:

On 09/02/2018 07:56 AM, Don Wilhelm wrote:

That W3EDP antenna is a strong suspect, as is any off-center fed antenna
or end fed antenna.  They can produce large amounts of RF in the shack.

Hi Gwen,

Don is correct. The W3EDP with a large choke Balun, as pictured, between
the Unun and KX3 is an OCF Doublet with a resonant frequency of 11 MHz.
It is rather difficult, if not impossible, to isolate a dipole end
impedance using a choke Balun. The KX3, being at the high impedance
point on 30 meters, will experience a rather high RF voltage.

A way to determine if the rig is part of the antenna is to use what I
call a "touch test." Observe SWR while transmitting, if touching the KX3
antenna BNC jack causes the SWR to change, then the KX3 is part of the
antenna. At the extreme, the touch results with a RF burn. I have
experience RF burn at 15 watts.

John KN5L
__
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...@n7xy.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] Bluetooth latency and CW reception

[Bob Nielsen, N7XY]

Thanks for that reply Phil.  Actually I also have Phonak hearing aids 
and a ComPilot II.  I will give that a try after I get my new K3S 
installed within the next few days.


I have only had the hearing aids for a few weeks but the improvement has 
exceeded my expectations.


73, Bob N7XY


On 8/19/18 11:40 AM, Phil Kane wrote:

On 8/17/2018 10:40 PM, Bob Nielsen, N7XY wrote:


Like many of us of a certain age, I have started wearing hearing aids

Welcome to the club.


Has anyone been able to use a bluetooth connection (such as bluetooth
headphones) successfully on CW?

My hearing aid devices (Phonax Audeo) use an around-the-neck pendant
adapter (Phonax ComPilot II) that does BT to and from my cell-phone but
couples to the hearing aid devices inductively.  It has a 3.5 mm  jack
that will feed external audio to the induction system as well.  Standard
3.5 mm M-M patch cord from the headphone lack on the radio or the
computer puts the audio sounds into my ears with no noticeable latency
problems, as tested with my K2.  They also make a BT adapter for
across-the-room TV sound use but I have never tried it because I have no
need for that.

Enjoy hearing again.

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

 From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to n...@n7xy.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] Bluetooth latency and CW reception

[Bob Nielsen, N7XY]

Like many of us of a certain age, I have started wearing hearing aids 
(actually I first tried one 20 years ago but since my hearing on one ear 
was still pretty good at the time I gave up on it soon after).  Now I 
have issues in both ears and am essentially deaf in one so I got aids 
with CROS technology to feed sound from both sides to my better ear.


Because of the technology involved in this, I was unable to get 
bluetooth capability in my hearing aid and have an adapter which 
receives bluetooth and  I have been told that it sends it to the aids 
with a very low power 10.6 MHz signal.  This works quite well but 
ordinary headphones aren't very comfortable when wearing the hearing 
aids and I would prefer to not have to remove them when operating.  I 
have been thinking about getting a bluetooth transmitter to connect to 
my K3S instead of using my headphones. However, I suspect that latency 
may be an issue and there might be an unacceptable delay between the 
keying input and the sidetone received by the hearing aids.  I N7XY'm 
also concerned that RF (especially on 30 meters) might saturate the 10.6 
MHz receiver inside the hearing aid.


Has anyone been able to use a bluetooth connection (such as bluetooth 
headphones) successfully on CW?


73, Bob N7XY

__
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