Re: [Elecraft] Elecraft Kit Assembly

[Nr4c]

Made one formyK3 build from piece of shrink-tubing. 

Sent from my iPhone
...nr4c. bill


> On Dec 2, 2020, at 3:41 PM, James Bennett via Elecraft 
>  wrote:
> 
> Yup, I still have mine from back in the late 60’s as a novice and use it 
> every time I build a kit!
> 
> Jim / W6JHB
> 
>> On Dec 2, 2020, at 12:35 PM, K9MA  wrote:
>> 
>> When assembling the KAT500 kit yesterday, I found it frustrating trying to 
>> get the nuts started on the connector screws. Then I remembered assembling 
>> Heathkits, like 50 years ago. Heathkit provided a little plastic tube thingy 
>> for starting hex nuts. (I'm sure some of you other OF's remember them. They 
>> were red.) I looked in the toolbox, and there were two of them! (They're 
>> still red.) Given all the hex nuts in the KAT500 kit, if I hadn't already 
>> had them, I'd have been glad to pay an extra 10 cents or so if one were 
>> included with the kit.
>> 
>> 73,
>> 
>> Scott K9MA
>> 
>> -- 
>> Scott  K9MA
>> 
>> k...@sdellington.us
>> 
>> __
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Re: [Elecraft] Arecibo antenna collapses

[Peter Hall]

Frank,

I was the foundation project engineer for the Square Kilometre Array (which 
your URL refers to), as well as leading much of the effort to get the SKA 
pathfinders on the ground here in Western Australia.  As you know, there's a 
complementary section of the Telescope in South Africa.  Naturally we're all 
excited about the prospects of the SKA, with the pathfinders having already 
done much good work.  However, despite many advances in signal processing over 
the years there is still a place for very large single aperture telescopes, 
such as the Chinese FAST instrument and (formerly) Arecibo.  I might add that a 
good deal of the impetus for FAST came from the Chinese participation in the 
SKA consortium, a body in which the US originally participated but later 
withdrew from.  While the millions of dollars do indeed mount up, the direct 
benefits and spin-offs from astronomy are substantial, even putting aside the 
basic science outcomes.  I certainly hope the US is able to continue on its 
distinguished path in radio astronomy and, SKA and FAST aside, there are many 
other prospects - on and off-shore - for ensuring that happens.  Like all 
science, though, it relies on the enlightened being able to spread the good 
word!

73, Peter (VK6HP).




-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Frank Stein
Sent: Thursday, 3 December 2020 10:20 AM
To: Wes 
Cc:  
Subject: Re: [Elecraft] Arecibo antenna collapses

There is also the Square kilometer array radio telescope:
https://secure-web.cisco.com/12MAQQcd67xMePXjKd5h8T5I3McR14SDT4pj4Zx1A9cA08lv5nb8kOz0ZNAvZX7GbXyBQ-YSj_PmhDxNs3AlPdEx8-DL3FE-ZfPRtfBQwb6L5l06oidXgV_pudn0RjC4twig28CEn5qf9qqWWAey1azWK0TGwqHtIzASG3YBZhyJ-xrGUpz2x6sMGYKEWlg0qj-bHsWpA0lzPav6HAYtn9zFUmFBkDedjsZ5VSdPKmJeEKouXEzLAHbNJ_HnJ6LqHZQDTDJ7jLRyZutzV23lOI6A3jj4Mcbuab07BQrN0VV-6bCdnPvNpZNDWRFczzGu-F1fGlvlfXCGhCTigYwsyERaQLafgwrCJVuKdKww-6uFBy9lftPLhRazSzlCZX7--hRyXLmaD4auG6WsEz1YUxd9moALrCA-7mNSRynjOZrLRm0AKYjyi5G0v7yfYkN9D_D79Bn8paF0SbEa7S7Y3i8zAevBzseCNeDmzNNp7EaU/https%3A%2F%2Fwww.skatelescope.org%2F

It could be ready to operate before the decade is out and is even bigger.

- frank
W4TG

On Wed, Dec 2, 2020 at 7:03 PM Wes  wrote:

> Did they show you the transmitter?
>
> Wes  N7WS
>
>
> On 12/2/2020 10:22 AM, Andrew Faber via Elecraft wrote:
> > This is certainly getting way off topic on the Elecraft reflector, 
> > but I
> can’t resist mentioning that I have visited the FAST telescope in 
> Guizhou Province.  Here is a brief explanation from my trip notes (we 
> were guests because my wife is an astronomer with many Chinese 
> colleagues).  It’s odd that they are creating a tourist destination, 
> since normally such telescopes are located to minimize RFI.
> >
> > “We were met by a driver from FAST in a Honda Odyssey for the 
> > two-hour
> drive to Pingtang, China’s self-proclaimed “Astronomy City.”  There is 
> a huge amount of new construction, as they try to take advantage of 
> the FAST to create a tourist destination. There are new shops and 
> hotels being built, and on the sides of the roads they even have 
> statues and bas reliefs of famous scientists and scientific 
> instruments.  FAST stands for “Five hundred meter Aperture Spherical 
> radio Telescope,” and that’s just what it is – outdoing the 300-meter 
> radio telescope at Arecibo, Puerto Rico by far.  It’s in a valley that 
> had a dozen or so homes before they houses were demolished.  It’s 500 
> meters across, and is partly steerable, since the panels can be 
> somewhat deformed by 4,000 actuators pulling on cables that tug on the 
> panels that comprise the reflective surface.  The receiving “cabin” is 
> suspended on cables attached to six huge (maybe 350-400 feet
> tall) towers.  So by moving the cabin and pulling on cables, they can 
> apparently track through about 20 degrees, unlike Arecibo, which is 
> fixed in a spherical shape.  The actuators that deform the mirror into 
> a parabola are hydraulic and need only pull about a foot and a half or 
> so on each cable.  Although it was late, we drove down for a quick 
> look at the telescope, since it wasn’t raining.  It’s an unbelievably 
> impressive mechanical construct.
> >
> > 73, andy ae6y
>
>
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Re: [Elecraft] Arecibo antenna collapses

[Frank Stein]

There is also the Square kilometer array radio telescope:
https://www.skatelescope.org/

It could be ready to operate before the decade is out and is even bigger.

- frank
W4TG

On Wed, Dec 2, 2020 at 7:03 PM Wes  wrote:

> Did they show you the transmitter?
>
> Wes  N7WS
>
>
> On 12/2/2020 10:22 AM, Andrew Faber via Elecraft wrote:
> > This is certainly getting way off topic on the Elecraft reflector, but I
> can’t resist mentioning that I have visited the FAST telescope in Guizhou
> Province.  Here is a brief explanation from my trip notes (we were guests
> because my wife is an astronomer with many Chinese colleagues).  It’s odd
> that they are creating a tourist destination, since normally such
> telescopes are located to minimize RFI.
> >
> > “We were met by a driver from FAST in a Honda Odyssey for the two-hour
> drive to Pingtang, China’s self-proclaimed “Astronomy City.”  There is a
> huge amount of new construction, as they try to take advantage of the FAST
> to create a tourist destination. There are new shops and hotels being
> built, and on the sides of the roads they even have statues and bas reliefs
> of famous scientists and scientific instruments.  FAST stands for “Five
> hundred meter Aperture Spherical radio Telescope,” and that’s just what it
> is – outdoing the 300-meter radio telescope at Arecibo, Puerto Rico by
> far.  It’s in a valley that had a dozen or so homes before they houses were
> demolished.  It’s 500 meters across, and is partly steerable, since the
> panels can be somewhat deformed by 4,000 actuators pulling on cables that
> tug on the panels that comprise the reflective surface.  The receiving
> “cabin” is suspended on cables attached to six huge (maybe 350-400 feet
> tall) towers.  So by moving the cabin and pulling on cables, they can
> apparently track through about 20 degrees, unlike Arecibo, which is fixed
> in a spherical shape.  The actuators that deform the mirror into a parabola
> are hydraulic and need only pull about a foot and a half or so on each
> cable.  Although it was late, we drove down for a quick look at the
> telescope, since it wasn’t raining.  It’s an unbelievably impressive
> mechanical construct.
> >
> > 73, andy ae6y
>
>
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[Elecraft] FW: Replacement headphone pads

[Mike Smith VE9AA]

de VE9AA.I don't know if the 2 pix imbedded will cross the reflector (they
didn't, this is my 2nd try), but if they don't, then the pads are "Brainwavz
Velour Ear pads" on Amazon.ca for $35.99 CDN and the picture of me..no loss
if you don't see me (big HI HI)

 

I love my Yamaha CM-500 headphones that a local originally did a group buy
for, 5 or 6 yrs ago(tnx), but the black vinyl(?) pads wore out.badly...black
flaky goo specks all over my ears and neck every contest recently, so I
bought these on Amazon and installed them a day before the CQWW contest.  I
believe they'll fit a wide range of popular headphones.  

 

They were very comfy to wear for 32-33hrs this past w/e but of course I
can't say how they'll be 6 yrs from now.  They are some kind of velour(ish?)
fabric with a PU leather (leatherette) piece that wraps around the actual
plastic speaker grill. Not especially easy to install (no pads will be for
that matter) but totally doable.

 

Me, still smilin' ~24hrs before CQWW CW..but pretty tired by Monday @ z
(and not smilin')(ok, pic didn't show but for you CWOps, it's on a thread
there)

 

Yes, red on black is a bit weird. Whatev's..hi.they do fit a bit better than
the pic indicates..I was just doing a quick selfie for my wife (who was at
work) when I told her I put red pads on black phones.  For the real radio
operation, I adjusted the headband better and these fit completely over my
ears and against my skull (for lack of a better description).  They are a
titch thicker than stock.

 

Again, for CWOps.pix came through there OK.

 

Mike VE9AA

 

Keswick Ridge, NB

 

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Re: [Elecraft] Elecraft Kit Assembly

[Rob, N9DTT via Elecraft]

A reasonable alternative can be made with a pencil or dowel stock and some 
non-adhesive shrink tubing.


—
Rob
N9DTT

Sent with ProtonMail Secure Email.

‐‐‐ Original Message ‐‐‐
On Wednesday, December 2, 2020 2:53 PM, KENT TRIMBLE  wrote:

> That's been suggested to Elecraft many times over the past 21 years.
>
> Wonder if anyone still makes them.
>
> My three sleep in their own bin!
>
> 73,
>
> Kent  K9ZTV
>
> On 12/2/2020 2:35 PM, K9MA wrote:
>
> > When assembling the KAT500 kit yesterday, I found it frustrating
> > trying to get the nuts started on the connector screws. Then I
> > remembered assembling Heathkits, like 50 years ago. Heathkit provided
> > a little plastic tube thingy for starting hex nuts. (I'm sure some of
> > you other OF's remember them. They were red.) I looked in the toolbox,
> > and there were two of them! (They're still red.) Given all the hex
> > nuts in the KAT500 kit, if I hadn't already had them, I'd have been
> > glad to pay an extra 10 cents or so if one were included with the kit.
> > 73,
> > Scott K9MA
>
> --
>
> This email has been checked for viruses by AVG.
> https://www.avg.com
>
> Elecraft mailing list
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Re: [Elecraft] KPA500/KAT500 and RTTY

[Dave Cole]

Thank you Richard.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 3:50 PM, DC wrote:

I run 500 watts FT8 6 through 80 meters with a maximum SWR of 1.2 to 1 into an 
80 meter full wave loop and a 6 meter beam.  Even on the hottest of days I have 
never seen 70 degrees on the KPA500 utility.  BTW, I use it 95% remote and it 
works great.

If I ever saw over 70 degrees I would let it cool down and look for a problem.  
 The utility is great for remote operation with a program like team viewer or 
Google Remote.

Richard
K6VV


Sent from my iPhone


On Dec 2, 2020, at 3:02 PM, Dave Cole  wrote:

Thank you Bob, getting some actual numbers helps...  I cut off operations at 
70C.  In fact, if it starts getting above 65, I will terminate ASAP.  Knowing 
it could get to 90C makes me feel a lot better!

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources


On 12/2/20 1:25 PM, Bob McGraw K4TAX wrote:
While I don't often run RTTY, I do run a good bit of PSK-31, WSJT-X FT-8 and 
MSK-144 along with CW and SSB modes.   I do watch the PA temp, specially as it 
nears 65 to 70 degrees C.   I also run with the Fan on #1 or #2 for starters.   
 I know some will say it doesn't make a difference while others say it will.   
As to me, I know that heat is the downfall of solid state electronics.  Cool is 
always better.
For the above, I normally run 400 to 500 watts, depending which power indicator 
I choose.  And, a very important point,  at any time I never exceed 500 watts 
into a well matched load.   I do have a Bird 43P with a 500 watt, 2 - 30 MHz, 
element in-line between the amp output and ATU input.   I also have a 500 watt 
element, 25 - 60 MHz, for 6 meters.
Two facts to which I view one must pay attention:  {per the KPA500 manual}
(a) Duty Cycle a 500 watts = 10 minutes key down / 5 minutes standby
(b) Heat Sink Temp = 90°C Maximum  {194° F}
I view if one exceeds either of these two items abovethey just became a 
very underpaid design and test engineer.
73
Bob, K4TAX
Message: 1
Date: Wed, 2 Dec 2020 08:36:54 -0800
From: Dave Cole
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/KAT500 and RTTY
Thanks sir...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 8:24 AM, Gordon LaPoint wrote:
Dave,

I have done many RTTY contests and regular qso's using the
KPA500/KAT500/K3 over the last few years. I run full 500 watts with no
problems, the temp gets up to the 60 to 65 range a lot when calling CQ
in a contest, or during a 10 minute tx.? If the temp gets to 70 then the
fan kicks into high gear and is very noisy, but still within specs.
Gordon - N1MGO


On 12/2/2020 9:57 AM, Dave Cole wrote:
Hi,

Any recommendations as to the max power I might run using a KPA500 and
KAT500, on say, a three to five minute transmission?

Also, what is the recommended max temp for the PA on this device as
measured by the KPA500?


_

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Re: [Elecraft] Elecraft Kit Assembly

[Harry Yingst via Elecraft]

 If you search for "Menda 35120" you will find other vendors selling them
Mouser, Newark< Digi-Key, etc


On Wednesday, December 2, 2020, 07:16:02 PM EST, Joe K2UF  
wrote:  
 
 And $9.00 shipping + tax 

73,  joe K2UF

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of K9MA
Sent: Wednesday, December 2, 2020 3:57 PM
To: Harry Yingst; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft Kit Assembly

And a whole $2.00!

That's pretty much what the Heathkit one looks like, only red.

73,
Scott K9MA

On 12/2/2020 3:56 PM, Harry Yingst wrote:
> Looks like Jenson Tools sells them
>
> Look Here
> https://www.jensentools.com/menda-35120-four-way-nut-starter/p/758ie35
> 1
>
>
>
>
>
>
> On Wednesday, December 2, 2020, 03:37:55 PM EST, K9MA 
>  wrote:
>
>
> When assembling the KAT500 kit yesterday, I found it frustrating 
> trying to get the nuts started on the connector screws. Then I 
> remembered assembling Heathkits, like 50 years ago. Heathkit provided 
> a little plastic tube thingy for starting hex nuts. (I'm sure some of 
> you other OF's remember them. They were red.) I looked in the toolbox, 
> and there were two of them! (They're still red.) Given all the hex 
> nuts in the KAT500 kit, if I hadn't already had them, I'd have been 
> glad to pay an extra 10 cents or so if one were included with the kit.
>
> 73,
>
> Scott K9MA
>
> --
> Scott  K9MA
>
> k...@sdellington.us 
>
> __
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> 
>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> hlyin...@yahoo.com 


--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] Elecraft Kit Assembly

[Joe K2UF]

And $9.00 shipping + tax 

73,  joe K2UF

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of K9MA
Sent: Wednesday, December 2, 2020 3:57 PM
To: Harry Yingst; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft Kit Assembly

And a whole $2.00!

That's pretty much what the Heathkit one looks like, only red.

73,
Scott K9MA

On 12/2/2020 3:56 PM, Harry Yingst wrote:
> Looks like Jenson Tools sells them
>
> Look Here
> https://www.jensentools.com/menda-35120-four-way-nut-starter/p/758ie35
> 1
>
>
>
>
>
>
> On Wednesday, December 2, 2020, 03:37:55 PM EST, K9MA 
>  wrote:
>
>
> When assembling the KAT500 kit yesterday, I found it frustrating 
> trying to get the nuts started on the connector screws. Then I 
> remembered assembling Heathkits, like 50 years ago. Heathkit provided 
> a little plastic tube thingy for starting hex nuts. (I'm sure some of 
> you other OF's remember them. They were red.) I looked in the toolbox, 
> and there were two of them! (They're still red.) Given all the hex 
> nuts in the KAT500 kit, if I hadn't already had them, I'd have been 
> glad to pay an extra 10 cents or so if one were included with the kit.
>
> 73,
>
> Scott K9MA
>
> --
> Scott  K9MA
>
> k...@sdellington.us 
>
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> hlyin...@yahoo.com 


--
Scott  K9MA

k...@sdellington.us

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[Elecraft] Arecibo

[edauer]

A postscript to my previous post -- the SETI discussion titled "Radio
Astronomy: The End of Big Dishes? " is still available online at
https://www.seti.org/event/seti-talks-radio-astronomy-end-big-dishes.  

Another SETI event, which may even be this week or next, is a discussion of
the science and the background of the Parkes (Australia) dish, including a
showing of the movie "The Dish" about the Parkes' facility's role in the
Apollo 11 landing.

Ted, KN1CBR

Edward A. Dauer
eda...@aya.yale.edu

-Original Message-
From: eda...@aya.yale.edu  
Sent: Wednesday, December 2, 2020 2:15 PM
To: elecraft@mailman.qth.net
Subject: RE: Elecraft Digest, Vol 200, Issue 3

Just before the cable failures a few weeks ago SETI did a webinar on the
very subject.  What I took away from it was that the future of radio
astronomy lies in VLBI arrays rather than wide-diameter dishes, and that for
economic as well as electronic reasons the direction is toward more numerous
much smaller antennas and lots of enhancements in data processing.  In
response to a question I put during the Q, the presenters' answer was yes,
that direction in radio astronomy's evolution will increase the potential
for amateurs to contribute to the kind of research large dishes have been
doing.

I too regret the catastrophe at Arecibo.  In fact, I took the occasion to
rewatch "Contact," in which Ellie Arroway as a young girl, signing W9GFO and
frustrated at her inability to reach her father on (I assume HF) SSB said
wistfully, "I need a bigger antenna."  The next scene was the more mature
Ellie standing at the edge of Arecibo.  

But despite the loss of a legendary facility, if what I heard at the SETI
event was correct, there will not likely be any serious effort to rebuild
it.

Ted, KN1CBR 


From: elecraft-boun...@mailman.qth.net  on
behalf of Grant Youngman 
Sent: Wednesday, December 2, 2020 11:47 AM
To: Elecraft Refl 
Subject: Re: [Elecraft] Arecibo antenna collapses

I suppose the question is why not rebuild it if the capability (or an
upgraded capability) remains of consequential value to the scientific
community and there is no existing capability that can be cobbled together
elsewhere to match it.  I don?t know what it would cost, but consider that
one Virginia-class submarine costs well over $3B.  We build those, even if
it is in small numbers.  It?s a matter of priorities ? and pretty small $$
in the big picture.

Grant NQ5T

> 


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Re: [Elecraft] Arecibo antenna collapses

[Wes]

Did they show you the transmitter?

Wes  N7WS


On 12/2/2020 10:22 AM, Andrew Faber via Elecraft wrote:

This is certainly getting way off topic on the Elecraft reflector, but I can’t 
resist mentioning that I have visited the FAST telescope in Guizhou Province.  
Here is a brief explanation from my trip notes (we were guests because my wife 
is an astronomer with many Chinese colleagues).  It’s odd that they are 
creating a tourist destination, since normally such telescopes are located to 
minimize RFI.

“We were met by a driver from FAST in a Honda Odyssey for the two-hour drive to 
Pingtang, China’s self-proclaimed “Astronomy City.”  There is a huge amount of 
new construction, as they try to take advantage of the FAST to create a tourist 
destination. There are new shops and hotels being built, and on the sides of 
the roads they even have statues and bas reliefs of famous scientists and 
scientific instruments.  FAST stands for “Five hundred meter Aperture Spherical 
radio Telescope,” and that’s just what it is – outdoing the 300-meter radio 
telescope at Arecibo, Puerto Rico by far.  It’s in a valley that had a dozen or 
so homes before they houses were demolished.  It’s 500 meters across, and is 
partly steerable, since the panels can be somewhat deformed by 4,000 actuators 
pulling on cables that tug on the panels that comprise the reflective surface.  
The receiving “cabin” is suspended on cables attached to six huge (maybe 
350-400 feet tall) towers.  So by moving the cabin and pulling on cables, they 
can apparently track through about 20 degrees, unlike Arecibo, which is fixed 
in a spherical shape.  The actuators that deform the mirror into a parabola are 
hydraulic and need only pull about a foot and a half or so on each cable.  
Although it was late, we drove down for a quick look at the telescope, since it 
wasn’t raining.  It’s an unbelievably impressive mechanical construct.

73, andy ae6y



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Re: [Elecraft] Used antenna - Arecio antenna collapses

[Edward R Cole]

Really a shame to see its demise.  It might not be re-built in Puerto 
Rico due to exposure to Hurricanes and encroaching civilization 
threatens the radio quiet area for useful radio astronomy.  Wonder if 
a new site might be chosen (someday)?


I copied the 432 MHz SSB signal from Arecibo using my 16-foot dish 
and a hastily made 432 feed.  I tried sending JT65 signals at 100w 
but never got a reply.


In my college years radio astronomy was one of my career choices and 
I even got an invite to do Master's study at Ohio State with Dr. John 
Kraus-W8JK (who built the "Big Ear" radiotelescope).  But was not to 
be - I moved to LA in Nov. 1968 to start work with Hughes Aircraft on 
military projects. (don't ask)


Later in 1972, I did some minor radio astronomy using a 26m dish at Goldstone.

A lot of neat science was done at Arecibo.  Always wanted to  visit 
(too late now).  I did get to see the Big  Ear about 3-months before 
is was torn down to build a golf course.


This where I could make a political joke (but won't).

73, Ed - KL7UW

Date: Wed,  2 Dec 2020 14:51:02 -0500
From: Bill Frantz 
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Used antenna - Arecio antenna collapses

There are some interesting tidbits about Arecibo:

Joe Taylor, K1JT, or wsjt-x fame, did some of the work that lead
to his Nobel Prize at Arecibo. His also mounted an 'expedition'
in April 2010 to use the Arecibo Radio Telescope to conduct
moonbounce with Amateurs around the world using voice, Morse
code, and digital communications. [Wikipedia]

The Arecibo radio telescope was used as a powerful radar to
study other objects in the solar system. Things at certain
distances could not be studied because by the time the
transmitted signal reflected back, the Earth had turned enough
that the radio telescope was pointed in the wrong direction.

It's definitely a sad occurence. I sympathize with the people
who use black humor to handle their sadness.

73 Bill AE6JV


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] Elecraft Kit Assembly

[K9MA]

And a whole $2.00!

That's pretty much what the Heathkit one looks like, only red.

73,
Scott K9MA

On 12/2/2020 3:56 PM, Harry Yingst wrote:

Looks like Jenson Tools sells them

Look Here 
https://www.jensentools.com/menda-35120-four-way-nut-starter/p/758ie351







On Wednesday, December 2, 2020, 03:37:55 PM EST, K9MA 
 wrote:



When assembling the KAT500 kit yesterday, I found it frustrating trying
to get the nuts started on the connector screws. Then I remembered
assembling Heathkits, like 50 years ago. Heathkit provided a little
plastic tube thingy for starting hex nuts. (I'm sure some of you other
OF's remember them. They were red.) I looked in the toolbox, and there
were two of them! (They're still red.) Given all the hex nuts in the
KAT500 kit, if I hadn't already had them, I'd have been glad to pay an
extra 10 cents or so if one were included with the kit.

73,

Scott K9MA

--
Scott  K9MA

k...@sdellington.us 

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--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] Elecraft Kit Assembly

[Phil Kane]

On 12/2/2020 1:56 PM, Harry Yingst via Elecraft wrote:


  Looks like Jenson Tools sells them
Look Here  
https://www.jensentools.com/menda-35120-four-way-nut-starter/p/758ie351


You made me do it!  I couldn't find mine from my Heathkit days, so I 
ordered two - one to use, one to lose.  :)


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

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon

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Re: [Elecraft] KPA500/KAT500 and RTTY

[DC]

I run 500 watts FT8 6 through 80 meters with a maximum SWR of 1.2 to 1 into an 
80 meter full wave loop and a 6 meter beam.  Even on the hottest of days I have 
never seen 70 degrees on the KPA500 utility.  BTW, I use it 95% remote and it 
works great. 

If I ever saw over 70 degrees I would let it cool down and look for a problem.  
 The utility is great for remote operation with a program like team viewer or 
Google Remote.

Richard
K6VV


Sent from my iPhone

> On Dec 2, 2020, at 3:02 PM, Dave Cole  wrote:
> 
> Thank you Bob, getting some actual numbers helps...  I cut off operations at 
> 70C.  In fact, if it starts getting above 65, I will terminate ASAP.  Knowing 
> it could get to 90C makes me feel a lot better!
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> 
>> On 12/2/20 1:25 PM, Bob McGraw K4TAX wrote:
>> While I don't often run RTTY, I do run a good bit of PSK-31, WSJT-X FT-8 and 
>> MSK-144 along with CW and SSB modes.   I do watch the PA temp, specially as 
>> it nears 65 to 70 degrees C.   I also run with the Fan on #1 or #2 for 
>> starters.I know some will say it doesn't make a difference while others 
>> say it will.   As to me, I know that heat is the downfall of solid state 
>> electronics.  Cool is always better.
>> For the above, I normally run 400 to 500 watts, depending which power 
>> indicator I choose.  And, a very important point,  at any time I never 
>> exceed 500 watts into a well matched load.   I do have a Bird 43P with a 500 
>> watt, 2 - 30 MHz, element in-line between the amp output and ATU input.   I 
>> also have a 500 watt element, 25 - 60 MHz, for 6 meters.
>> Two facts to which I view one must pay attention:  {per the KPA500 manual}
>> (a) Duty Cycle a 500 watts = 10 minutes key down / 5 minutes standby
>> (b) Heat Sink Temp = 90°C Maximum  {194° F}
>> I view if one exceeds either of these two items abovethey just 
>> became a very underpaid design and test engineer.
>> 73
>> Bob, K4TAX
>> Message: 1
>> Date: Wed, 2 Dec 2020 08:36:54 -0800
>> From: Dave Cole
>> To:elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] KPA500/KAT500 and RTTY
>> Thanks sir...
>> 73, and thanks,
>> Dave (NK7Z)
>> https://www.nk7z.net
>> ARRL Volunteer Examiner
>> ARRL Technical Specialist, RFI
>> ARRL Asst. Director, NW Division, Technical Resources
>>> On 12/2/20 8:24 AM, Gordon LaPoint wrote:
>>> Dave,
>>> 
>>> I have done many RTTY contests and regular qso's using the
>>> KPA500/KAT500/K3 over the last few years. I run full 500 watts with no
>>> problems, the temp gets up to the 60 to 65 range a lot when calling CQ
>>> in a contest, or during a 10 minute tx.? If the temp gets to 70 then the
>>> fan kicks into high gear and is very noisy, but still within specs.
>>> Gordon - N1MGO
>>> 
 On 12/2/2020 9:57 AM, Dave Cole wrote:
 Hi,
 
 Any recommendations as to the max power I might run using a KPA500 and
 KAT500, on say, a three to five minute transmission?
 
 Also, what is the recommended max temp for the PA on this device as
 measured by the KPA500?
 
>>> _
>> __
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>> Post: mailto:Elecraft@mailman.qth.net
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>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to d...@nk7z.net
> __
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> Message delivered to vetteresto...@gmail.com
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Re: [Elecraft] KPA500/KAT500 and RTTY

[Dave Cole]

Thank you Bob, getting some actual numbers helps...  I cut off 
operations at 70C.  In fact, if it starts getting above 65, I will 
terminate ASAP.  Knowing it could get to 90C makes me feel a lot better!


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 1:25 PM, Bob McGraw K4TAX wrote:
While I don't often run RTTY, I do run a good bit of PSK-31, WSJT-X FT-8 
and MSK-144 along with CW and SSB modes.   I do watch the PA temp, 
specially as it nears 65 to 70 degrees C.   I also run with the Fan on 
#1 or #2 for starters.    I know some will say it doesn't make a 
difference while others say it will.   As to me, I know that heat is the 
downfall of solid state electronics.  Cool is always better.


For the above, I normally run 400 to 500 watts, depending which power 
indicator I choose.  And, a very important point,  at any time I never 
exceed 500 watts into a well matched load.   I do have a Bird 43P with a 
500 watt, 2 - 30 MHz, element in-line between the amp output and ATU 
input.   I also have a 500 watt element, 25 - 60 MHz, for 6 meters.


Two facts to which I view one must pay attention:  {per the KPA500 manual}

(a) Duty Cycle a 500 watts = 10 minutes key down / 5 minutes standby

(b) Heat Sink Temp = 90°C Maximum  {194° F}

I view if one exceeds either of these two items abovethey just 
became a very underpaid design and test engineer.


73

Bob, K4TAX

Message: 1
Date: Wed, 2 Dec 2020 08:36:54 -0800
From: Dave Cole
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/KAT500 and RTTY


Thanks sir...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 8:24 AM, Gordon LaPoint wrote:


Dave,

I have done many RTTY contests and regular qso's using the
KPA500/KAT500/K3 over the last few years. I run full 500 watts with no
problems, the temp gets up to the 60 to 65 range a lot when calling CQ
in a contest, or during a 10 minute tx.? If the temp gets to 70 then the
fan kicks into high gear and is very noisy, but still within specs.
Gordon - N1MGO

On 12/2/2020 9:57 AM, Dave Cole wrote:

Hi,

Any recommendations as to the max power I might run using a KPA500 and
KAT500, on say, a three to five minute transmission?

Also, what is the recommended max temp for the PA on this device as
measured by the KPA500?


_

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Re: [Elecraft] Elecraft Kit Assembly

[Harry Yingst via Elecraft]

 Looks like Jenson Tools sells them
Look Here 
https://www.jensentools.com/menda-35120-four-way-nut-starter/p/758ie351





On Wednesday, December 2, 2020, 03:37:55 PM EST, K9MA  
wrote:  
 
 When assembling the KAT500 kit yesterday, I found it frustrating trying 
to get the nuts started on the connector screws. Then I remembered 
assembling Heathkits, like 50 years ago. Heathkit provided a little 
plastic tube thingy for starting hex nuts. (I'm sure some of you other 
OF's remember them. They were red.) I looked in the toolbox, and there 
were two of them! (They're still red.) Given all the hex nuts in the 
KAT500 kit, if I hadn't already had them, I'd have been glad to pay an 
extra 10 cents or so if one were included with the kit.

73,

Scott K9MA

-- 
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] Elecraft Kit Assembly

[Jim Brown]

On 12/2/2020 12:35 PM, K9MA wrote:
I looked in the toolbox, and there were two of them! (They're still 
red.) 


Me too.

Given all the hex nuts in the KAT500 kit, if I hadn't already had
them, I'd have been glad to pay an extra 10 cents or so if one were 
included with the kit.


Me too!

73, Jim K9YC

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[Elecraft] KPA500/KAT500 and RTTY

[Bob McGraw K4TAX]

While I don't often run RTTY, I do run a good bit of PSK-31, WSJT-X FT-8 
and MSK-144 along with CW and SSB modes.   I do watch the PA temp, 
specially as it nears 65 to 70 degrees C.   I also run with the Fan on 
#1 or #2 for starters.    I know some will say it doesn't make a 
difference while others say it will.   As to me, I know that heat is the 
downfall of solid state electronics.  Cool is always better.


For the above, I normally run 400 to 500 watts, depending which power 
indicator I choose.  And, a very important point,  at any time I never 
exceed 500 watts into a well matched load.   I do have a Bird 43P with a 
500 watt, 2 - 30 MHz, element in-line between the amp output and ATU 
input.   I also have a 500 watt element, 25 - 60 MHz, for 6 meters.


Two facts to which I view one must pay attention:  {per the KPA500 manual}

(a) Duty Cycle a 500 watts = 10 minutes key down / 5 minutes standby

(b) Heat Sink Temp = 90°C Maximum  {194° F}

I view if one exceeds either of these two items abovethey just 
became a very underpaid design and test engineer.


73

Bob, K4TAX

Message: 1
Date: Wed, 2 Dec 2020 08:36:54 -0800
From: Dave Cole
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500/KAT500 and RTTY


Thanks sir...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 8:24 AM, Gordon LaPoint wrote:


Dave,

I have done many RTTY contests and regular qso's using the
KPA500/KAT500/K3 over the last few years. I run full 500 watts with no
problems, the temp gets up to the 60 to 65 range a lot when calling CQ
in a contest, or during a 10 minute tx.? If the temp gets to 70 then the
fan kicks into high gear and is very noisy, but still within specs.
Gordon - N1MGO

On 12/2/2020 9:57 AM, Dave Cole wrote:

Hi,

Any recommendations as to the max power I might run using a KPA500 and
KAT500, on say, a three to five minute transmission?

Also, what is the recommended max temp for the PA on this device as
measured by the KPA500?


_

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Re: [Elecraft] Elecraft Digest, Vol 200, Issue 3

[edauer]

Just before the cable failures a couple of weeks ago SETI did a webinar on
the very subject.  What I took away from it was that the future of radio
astronomy lies in VLBI arrays rather than wide-diameter dishes, and that for
economic as well as electronic reasons the direction is toward more numerous
much smaller antennas and lots of enhancements in data processing.  In
response to a question I put during the Q, the presenters' answer was yes,
that direction in radio astronomy's evolution will increase the potential
for amateurs to contribute to the kind of research large dishes have been
doing.

I too regret the catastrophe at Arecibo.  In fact, I took the occasion to
rewatch "Contact," in which Ellie Arroway as a young girl, signing W9GFO and
frustrated at her inability to reach her father on (I assume HF) SSB said
wistfully, "I need a bigger antenna."  The next scene was the more mature
Ellie standing at the edge of Arecibo.  

But despite the loss of a legendary facility, if what I heard at the SETI
event was correct, there will not likely be any serious effort to rebuild
it.

Ted, KN1CBR 


From: elecraft-boun...@mailman.qth.net  on
behalf of Grant Youngman 
Sent: Wednesday, December 2, 2020 11:47 AM
To: Elecraft Refl 
Subject: Re: [Elecraft] Arecibo antenna collapses

I suppose the question is why not rebuild it if the capability (or an
upgraded capability) remains of consequential value to the scientific
community and there is no existing capability that can be cobbled together
elsewhere to match it.  I don?t know what it would cost, but consider that
one Virginia-class submarine costs well over $3B.  We build those, even if
it is in small numbers.  It?s a matter of priorities ? and pretty small $$
in the big picture.

Grant NQ5T

> 

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Re: [Elecraft] Elecraft Kit Assembly

[Drew AF2Z]

I can't speak to the KAT500 kit but for other Elecraft kits I have found 
that magnetized screwdrivers and/or nut drivers really help you breeze 
through the assembly.


73,
Drew
AF2Z


On 12/02/20 15:35, K9MA wrote:
When assembling the KAT500 kit yesterday, I found it frustrating trying 
to get the nuts started on the connector screws. Then I remembered 
assembling Heathkits, like 50 years ago. Heathkit provided a little 
plastic tube thingy for starting hex nuts. (I'm sure some of you other 
OF's remember them. They were red.) I looked in the toolbox, and there 
were two of them! (They're still red.) Given all the hex nuts in the 
KAT500 kit, if I hadn't already had them, I'd have been glad to pay an 
extra 10 cents or so if one were included with the kit.


73,

Scott K9MA


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Re: [Elecraft] Elecraft Kit Assembly

[Don Wilhelm]

Kent,

I bought some on Ebay about 3 years ago.
The old ones from my Heathkit days were split and no longer held the nuts.

73,
Don W3FPR

On 12/2/2020 3:53 PM, KENT TRIMBLE wrote:

That's been suggested to Elecraft many times over the past 21 years.

Wonder if anyone still makes them.

My three sleep in their own bin!

73,

Kent  K9ZTV


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Re: [Elecraft] Arecibo antenna collapses

[David Woolley]

Arecibo was steerable by moving the feed point.  They compensated for 
spherical aberration by using a travelling wave antenna for the feed, 
and later by using a series of sub-reflectors, the latter in the 
gondola.  The spherical aberration is independent of pointing direction, 
which, I believe, is why they went for a spherical, rather than a 
parabolic, shape.


--
David Woolley


On 02/12/2020 17:22, Andrew Faber wrote:

So by moving the cabin and pulling on cables, they can apparently track through 
about 20 degrees, unlike Arecibo, which is fixed in a spherical shape.


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Re: [Elecraft] Elecraft Kit Assembly

[Joe K2UF]

I use mine all the time for 4-40 nuts.  It must be 50+ years old and it has
seen better days.  Getting a little loose and fuzzy on the end.  Tried
finding them on the internet machine.  I have used small stiff tubing for
various size nuts but not the same thing.

Good luck,

73 Joe K2UF 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of K9MA
Sent: Wednesday, December 2, 2020 12:36 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Elecraft Kit Assembly

When assembling the KAT500 kit yesterday, I found it frustrating trying to
get the nuts started on the connector screws. Then I remembered assembling
Heathkits, like 50 years ago. Heathkit provided a little plastic tube thingy
for starting hex nuts. (I'm sure some of you other OF's remember them. They
were red.) I looked in the toolbox, and there were two of them! (They're
still red.) Given all the hex nuts in the KAT500 kit, if I hadn't already
had them, I'd have been glad to pay an extra 10 cents or so if one were
included with the kit.

73,

Scott K9MA

--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] Elecraft Kit Assembly

[KENT TRIMBLE]

That's been suggested to Elecraft many times over the past 21 years.

Wonder if anyone still makes them.

My three sleep in their own bin!

73,

Kent  K9ZTV



On 12/2/2020 2:35 PM, K9MA wrote:
When assembling the KAT500 kit yesterday, I found it frustrating 
trying to get the nuts started on the connector screws. Then I 
remembered assembling Heathkits, like 50 years ago. Heathkit provided 
a little plastic tube thingy for starting hex nuts. (I'm sure some of 
you other OF's remember them. They were red.) I looked in the toolbox, 
and there were two of them! (They're still red.) Given all the hex 
nuts in the KAT500 kit, if I hadn't already had them, I'd have been 
glad to pay an extra 10 cents or so if one were included with the kit.


73,

Scott K9MA





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Re: [Elecraft] Kinda cool graphic of solar activity

[Louandzip via Elecraft]

 It's just a pretty picture.  Not useful for predicting propagation. 

W7HV

On Wednesday, December 2, 2020, 9:35:46 AM MST, Michael Walker 
 wrote:  
 
 If you really want to learn about the Solar Forecast, watch this.
This is all new science to solar storms and the talk directly impacts HF 
operators.
I won't spoil the ending, but if you want to see 10M open 24 hrs/day, it is 
worth watching.
https://youtu.be/lRNJPkQPo_g

Mike va3mw

On Wed, Dec 2, 2020 at 11:17 AM Louandzip via Elecraft 
 wrote:

From ESA
http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2020/11/soho_25_years_of_solar_imaging/22352502-1-eng-GB/SOHO_25_years_of_solar_imaging_pillars.jpg
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Re: [Elecraft] Elecraft Kit Assembly

[Ron Manfredi]

Probably one of Heath's greatest 'inventions.'   I also have one or two 
and they do come in handy.


Enjoy the new amp!

73,  Ron   WA2EIO



On 12/2/2020 3:35 PM, K9MA wrote:
When assembling the KAT500 kit yesterday, I found it frustrating 
trying to get the nuts started on the connector screws. Then I 
remembered assembling Heathkits, like 50 years ago. Heathkit provided 
a little plastic tube thingy for starting hex nuts. (I'm sure some of 
you other OF's remember them. They were red.) I looked in the toolbox, 
and there were two of them! (They're still red.) Given all the hex 
nuts in the KAT500 kit, if I hadn't already had them, I'd have been 
glad to pay an extra 10 cents or so if one were included with the kit.


73,

Scott K9MA


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Re: [Elecraft] Elecraft Kit Assembly

[James Bennett via Elecraft]

Yup, I still have mine from back in the late 60’s as a novice and use it every 
time I build a kit!

Jim / W6JHB

> On Dec 2, 2020, at 12:35 PM, K9MA  wrote:
> 
> When assembling the KAT500 kit yesterday, I found it frustrating trying to 
> get the nuts started on the connector screws. Then I remembered assembling 
> Heathkits, like 50 years ago. Heathkit provided a little plastic tube thingy 
> for starting hex nuts. (I'm sure some of you other OF's remember them. They 
> were red.) I looked in the toolbox, and there were two of them! (They're 
> still red.) Given all the hex nuts in the KAT500 kit, if I hadn't already had 
> them, I'd have been glad to pay an extra 10 cents or so if one were included 
> with the kit.
> 
> 73,
> 
> Scott K9MA
> 
> -- 
> Scott  K9MA
> 
> k...@sdellington.us
> 
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[Elecraft] Elecraft Kit Assembly

[K9MA]

When assembling the KAT500 kit yesterday, I found it frustrating trying 
to get the nuts started on the connector screws. Then I remembered 
assembling Heathkits, like 50 years ago. Heathkit provided a little 
plastic tube thingy for starting hex nuts. (I'm sure some of you other 
OF's remember them. They were red.) I looked in the toolbox, and there 
were two of them! (They're still red.) Given all the hex nuts in the 
KAT500 kit, if I hadn't already had them, I'd have been glad to pay an 
extra 10 cents or so if one were included with the kit.


73,

Scott K9MA

--
Scott  K9MA

k...@sdellington.us

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Re: [Elecraft] Used antenna - Arecio antenna collapses

[Bill Frantz]

There are some interesting tidbits about Arecibo:

Joe Taylor, K1JT, or wsjt-x fame, did some of the work that lead 
to his Nobel Prize at Arecibo. His also mounted an 'expedition' 
in April 2010 to use the Arecibo Radio Telescope to conduct 
moonbounce with Amateurs around the world using voice, Morse 
code, and digital communications. [Wikipedia]


The Arecibo radio telescope was used as a powerful radar to 
study other objects in the solar system. Things at certain 
distances could not be studied because by the time the 
transmitted signal reflected back, the Earth had turned enough 
that the radio telescope was pointed in the wrong direction.


It's definitely a sad occurence. I sympathize with the people 
who use black humor to handle their sadness.


73 Bill AE6JV

On 12/2/20 at 8:59 AM, weave...@usermail.com wrote:


EME (Earth - Mars - Earth) ? :-)

73,
Bill WE5P

Comfortably Numb


---
Bill Frantz| When all else fails:  | Periwinkle
(408)348-7900  | Voice and CW. | 150 Rivermead 
Rd #235
www.pwpconsult.com |   | Peterborough, 
NH 03458


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Re: [Elecraft] K4 Reports

[KENT TRIMBLE]

I don't recall an avalanche of questions with the K3, but I do recall a 
lot of impatient purchasers.  Once shipments began, they proceeded in 
fairly good numbers which quieted things down and I suspect the same 
thing will happen when the K4 ships.  Nor is there much need to flood 
the reflector when within 60-90 days Rob Sherwood, QST, and others will 
have technical reviews far superior to what most new owners might 
provide.  Moreover, initial reports are often misleading because 90% of 
the supposed problems stem from not reading and/or misunderstanding the 
manual.


73,

Kent  K9ZTV
(K3 21)




On 12/2/2020 12:50 PM, Terry Brown wrote:

My guess is a few of us have received their K4’s but are reluctant to post 
anything about them because of the avalanche of questions that will flood their 
inboxes.  I wasn’t an Elecraft user when the K3 came out, but I suspect the 
same thing happened then.  It sure would be nice to find some way to get user 
reports of the K4 without subjecting the poster with a flood of questions.






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Re: [Elecraft] K4 Reports

[Paul Van Dyke]

Hi Terry

Roughly 2 weeks ago I sent this out.
"12 + hours ago, I was lippy toward Elecraft and ate my words 20 minutes
later when I was told that my K4 was on a bench getting final upgrades and
the thought that it should be out the week AFTER Thanksgiving..  Then next
morning I woke up to 80 messages asking me for numbers...  The DAY after
Thanksgiving I had 10 people write to me and ask if the K4 was here and how
it was."

   As with the unboxing of one of the 1st KX3's, when the K4 comes in, I
will post pictures.

  Be well

Paul  KB9AVO

On Wed, Dec 2, 2020 at 1:51 PM Terry Brown  wrote:

> I know that this group consists of many of us who are very loyal Elecraft
> customers, many who ordered a K4 in the first hours orders were being
> taken.  My order went in Oct. 1, 2019,  so it may be March before I see
> mine.
>
> My guess is a few of us have received their K4’s but are reluctant to post
> anything about them because of the avalanche of questions that will flood
> their inboxes.
>
> I wasn’t an Elecraft user when the K3 came out, but I suspect the same
> thing happened then.
>
> It sure would be nice to find some way to get user reports of the K4
> without subjecting the poster with a flood of questions.
>
> 73,
>
> Terry
> N7TB
>
>
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[Elecraft] Another perspective on the Arecibo Telescope

[John Gibson]

To see another perspective on the Arecibo radio telescope, read



73,

John Gibson, no8v
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[Elecraft] K4 Reports

[Terry Brown]

I know that this group consists of many of us who are very loyal Elecraft 
customers, many who ordered a K4 in the first hours orders were being taken.  
My order went in Oct. 1, 2019,  so it may be March before I see mine. 

My guess is a few of us have received their K4’s but are reluctant to post 
anything about them because of the avalanche of questions that will flood their 
inboxes.   

I wasn’t an Elecraft user when the K3 came out, but I suspect the same thing 
happened then.  

It sure would be nice to find some way to get user reports of the K4 without 
subjecting the poster with a flood of questions. 

73,

Terry
N7TB

 
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[Elecraft] re Arecibo antenna collapses

[john]

Andy's wife is a very famous astronomer!
https://en.wikipedia.org/wiki/Sandra_Faber

John KK9A





Andrew FaberAE6Y wrote:

This is certainly getting way off topic on the Elecraft reflector, but  
I can’t resist mentioning that I have visited the FAST telescope in  
Guizhou Province.  Here is a brief explanation from my trip notes (we  
were guests because my wife is an astronomer with many Chinese  
colleagues).  It’s odd that they are creating a tourist destination,  
since normally such telescopes are located to minimize RFI.



73, andy ae6y

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[Elecraft] Elecraft K3s For Sale

[Irwin Darack]

 i am selling my Elecraft K3s and will post here before placing on Ebay.

Elecraft K3s - this radio was built by kit and is in excellent condition.

   - Serial # 10354
   - 100W Upgrade
   - Filters are: 2.7kHz, 2.1 kHz & 400 Hz.
   - Digital Voice Recorder
   - ATU - Antenna Tuner
   - Kit Manual & Owners Manual
   - Power Cord

I am also including the following books.
Fred Cady's ' The Elecraft K3s and P3 Manual'
Fred Cady's 'Elecraft Macro Programming Manual'

I am asking $2,500 (or best reasonable offer) with Free Shipping to
Continental US. Pick up or  local delivery from Doylestown, PA (-$100).

If interested, please contact me off reflector.
-- 
Irwin KD3TB
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[Elecraft] [OT] Re: Arecibo antenna collapses

[Kevin Cozens]

On 2020-12-02 11:06 a.m., j...@kk9a.com wrote:

I concur, it is sad that Arecibo will not be rebuilt.
I just saw the pictures of it on the BBC website. It looks like a complete 
write off based on the posted image.


https://www.bbc.com/news/world-us-canada-55147973

--
Cheers!

Kevin.

http://www.ve3syb.ca/   | "Nerds make the shiny things that
https://www.patreon.com/KevinCozens | distract the mouth-breathers, and
| that's why we're powerful"
Owner of Elecraft K2 #2172  |
#include  | --Chris Hardwick
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Re: [Elecraft] Arecibo antenna collapses

[William Hammond via Elecraft]

Indeed they do: https://www.nature.com/articles/d41586-019-02790-3 


73, Bill-AK5X

> On Dec 2, 2020, at 11:56 AM, Fred Jensen  wrote:
> 
> "A billion here, a billion there ... pretty soon you're talking about real 
> money."
> 
> Everett M. Dirksen [SK]
> Senator
> 
> I believe there's a larger [and newer] one in China.  Andy's [AE6Y] wife is 
> an astronomer and astrophysicist and I she mentioned it in a really cool 
> presentation to the Northern California Contest Club awhile back.
> 
> 73,
> 
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
> 
> On 12/2/2020 8:47 AM, Grant Youngman wrote:
>> I suppose the question is why not rebuild it if the capability (or an 
>> upgraded capability) remains of consequential value to the scientific 
>> community and there is no existing capability that can be cobbled together 
>> elsewhere to match it.  I don’t know what it would cost, but consider that 
>> one Virginia-class submarine costs well over $3B.  We build those, even if 
>> it is in small numbers.  It’s a matter of priorities … and pretty small $$ 
>> in the big picture.
>> 
>> Grant NQ5T
>> 
> 
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Re: [Elecraft] K4D questions - diversity, HDMI, Ref In

[William Hein]

Thanks again, Wayne.

I see a K4HD in my future...

73
Bill AA7XT

*Bill Hein*
*Sound Business Strategies, LLC*
*m 970-628-5120*
*b...@soundbusiness.us *



*The information contained in this transmission may contain privileged and
confidential information, including patient information protected by
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*Please help reduce paper and ink usage. Print only if necessary.*


On Wed, Dec 2, 2020 at 10:47 AM Wayne Burdick  wrote:

>
> > On Dec 2, 2020, at 9:23 AM, William Hein  wrote:
> >
> > Back to the phase locked receivers in the K4D. Does the K4HD retain this
> feature? I am wondering if the Superhet circuitry would mess up the phase
> coherence?
>
>
> The HDR (superhet) module is phase-locked at the IF. At the LO injection
> it's frequency-locked to a small fraction of a Hz. This results in very
> slow (mutliple-second) phase precessing when using diversity mode, which in
> our experience has no impact, given that atmospheric phase changes occur
> much more rapidly.
>
>
> > ...is there a way to bypass the K4HD Superhet circuits when not (for
> example) operating in a HF contest M2 or MM?
>
> Yes. There will be a top-level control for this purpose.
>
> 73,
> Wayne
> N6KR
>
>
> >
> > 73
> > Bill AA7xT
> >
> >
> > Bill Hein
> > Sound Business Strategies, LLC
> > m 970-628-5120
> > b...@soundbusiness.us
> >
> >
> >
> > The information contained in this transmission may contain privileged
> and confidential information, including patient information protected by
> federal and state privacy laws. It is intended only for the use of the
> person(s) named above. If you are not the intended recipient, you are
> hereby notified that any review, dissemination, distribution, or
> duplication of this communication is strictly prohibited. If you are not
> the intended recipient, please contact the sender by reply email and
> destroy all copies of the original message.
> >
> > Please help reduce paper and ink usage. Print only if necessary.
> >
> >
> > On Sat, Nov 21, 2020 at 5:53 PM Wayne Burdick  wrote:
> > Then yes, this should work. I had assumed it was producing a 1-Hz square
> wave.
> >
> > Wayne
> >
> > 
> > elecraft.com
> >
> >> On Nov 21, 2020, at 3:20 PM, William Hein 
> wrote:
> >>
> >> 
> >> Hi, Wayne!
> >>
> >> I'm very happy about the phase sync between the two rxs, that will be a
> lot of fun!
> >>
> >> FYI - The Bodnar GPS unit outputs a programmable output including 10
> MHz at various levels:
> >>
> >> Low-jitter GPS-locked precision frequency reference
> >> 450 Hz to 800 MHz output
> >> This device outputs two synchronised low-jitter reference clocks locked
> to GPS signal.
> >> Long term stability of output signal is defined by high accuracy of GPS
> Caesium references and theoretically approaches 1x10-12.
> >> Short term signal quality is defined by internal TCXO clock source
> providing high-quality, low phase noise clock signal with sub-picosecond
> RMS jitter.
> >> Digital PLL allows main output reference frequency to have almost any
> value between 450Hz and 800MHz.
> >> The second output frequency depends on the first output due to a common
> internal clock, if you need individual flexibility, multiple mini GPS units
> may be a better choice. If both outputs have the same frequency their
> relative phase shift can be adjusted. This can be used, for example, to
> generate two signals with 90° phase shift for use in I/Q mixer.
> >> Both output signals square wave at 3.3V CMOS levels with 50 Ohms
> characteristic impedance. Their output drive levels can be adjusted and
> outputs can be enabled and disabled independently.
> >> Output power level (measured at 10MHz, fundamental power channel):
> >> +13.3dBm, drive setting 32mA
> >> +12.7dBm, drive setting 24mA
> >> +11.4dBm, drive setting 16mA
> >>
> >> Bill Hein
> >> Sound Business Strategies, LLC
> >> m 970-628-5120
> >> b...@soundbusiness.us
> >>
> >>
> >>
> >> The information contained in this transmission may contain privileged
> and confidential information, including patient information protected by
> federal and state privacy laws. It is intended only for the use of the
> person(s) named above. If you are not the intended recipient, you are
> hereby notified that any review, dissemination, distribution, or
> duplication of this communication is strictly prohibited. If you are not
> the intended recipient, please contact the sender by reply email and
> destroy all copies of the original message.
> >>
> >> Please help reduce paper and ink usage. Print only if necessary.
> >>
> >>
> >> On Sat, Nov 21, 2020 at 2:46 PM Wayne Burdick 
> wrote:
> >>
> >> > On Nov 

Re: [Elecraft] Arecibo antenna collapses

[Fred Jensen]

"A billion here, a billion there ... pretty soon you're talking about 
real money."


Everett M. Dirksen [SK]
Senator

I believe there's a larger [and newer] one in China.  Andy's [AE6Y] wife 
is an astronomer and astrophysicist and I she mentioned it in a really 
cool presentation to the Northern California Contest Club awhile back.


73,

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

On 12/2/2020 8:47 AM, Grant Youngman wrote:

I suppose the question is why not rebuild it if the capability (or an upgraded 
capability) remains of consequential value to the scientific community and 
there is no existing capability that can be cobbled together elsewhere to match 
it.  I don’t know what it would cost, but consider that one Virginia-class 
submarine costs well over $3B.  We build those, even if it is in small numbers. 
 It’s a matter of priorities … and pretty small $$ in the big picture.

Grant NQ5T



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Re: [Elecraft] K4D questions - diversity, HDMI, Ref In

[Wayne Burdick]

> On Dec 2, 2020, at 9:23 AM, William Hein  wrote:
> 
> Back to the phase locked receivers in the K4D. Does the K4HD retain this 
> feature? I am wondering if the Superhet circuitry would mess up the phase 
> coherence?


The HDR (superhet) module is phase-locked at the IF. At the LO injection it's 
frequency-locked to a small fraction of a Hz. This results in very slow 
(mutliple-second) phase precessing when using diversity mode, which in our 
experience has no impact, given that atmospheric phase changes occur much more 
rapidly.


> ...is there a way to bypass the K4HD Superhet circuits when not (for example) 
> operating in a HF contest M2 or MM?

Yes. There will be a top-level control for this purpose.

73,
Wayne
N6KR


> 
> 73
> Bill AA7xT
> 
> 
> Bill Hein
> Sound Business Strategies, LLC
> m 970-628-5120
> b...@soundbusiness.us
> 
> 
> 
> The information contained in this transmission may contain privileged and 
> confidential information, including patient information protected by federal 
> and state privacy laws. It is intended only for the use of the person(s) 
> named above. If you are not the intended recipient, you are hereby notified 
> that any review, dissemination, distribution, or duplication of this 
> communication is strictly prohibited. If you are not the intended recipient, 
> please contact the sender by reply email and destroy all copies of the 
> original message.
> 
> Please help reduce paper and ink usage. Print only if necessary.
> 
> 
> On Sat, Nov 21, 2020 at 5:53 PM Wayne Burdick  wrote:
> Then yes, this should work. I had assumed it was producing a 1-Hz square 
> wave. 
> 
> Wayne
> 
> 
> elecraft.com
> 
>> On Nov 21, 2020, at 3:20 PM, William Hein  wrote:
>> 
>> 
>> Hi, Wayne!
>> 
>> I'm very happy about the phase sync between the two rxs, that will be a lot 
>> of fun!
>> 
>> FYI - The Bodnar GPS unit outputs a programmable output including 10 MHz at 
>> various levels:
>> 
>> Low-jitter GPS-locked precision frequency reference
>> 450 Hz to 800 MHz output
>> This device outputs two synchronised low-jitter reference clocks locked to 
>> GPS signal.
>> Long term stability of output signal is defined by high accuracy of GPS 
>> Caesium references and theoretically approaches 1x10-12.
>> Short term signal quality is defined by internal TCXO clock source providing 
>> high-quality, low phase noise clock signal with sub-picosecond RMS jitter.
>> Digital PLL allows main output reference frequency to have almost any value 
>> between 450Hz and 800MHz.
>> The second output frequency depends on the first output due to a common 
>> internal clock, if you need individual flexibility, multiple mini GPS units 
>> may be a better choice. If both outputs have the same frequency their 
>> relative phase shift can be adjusted. This can be used, for example, to 
>> generate two signals with 90° phase shift for use in I/Q mixer.
>> Both output signals square wave at 3.3V CMOS levels with 50 Ohms 
>> characteristic impedance. Their output drive levels can be adjusted and 
>> outputs can be enabled and disabled independently.
>> Output power level (measured at 10MHz, fundamental power channel):
>> +13.3dBm, drive setting 32mA
>> +12.7dBm, drive setting 24mA
>> +11.4dBm, drive setting 16mA
>> 
>> Bill Hein
>> Sound Business Strategies, LLC
>> m 970-628-5120
>> b...@soundbusiness.us
>> 
>> 
>> 
>> The information contained in this transmission may contain privileged and 
>> confidential information, including patient information protected by federal 
>> and state privacy laws. It is intended only for the use of the person(s) 
>> named above. If you are not the intended recipient, you are hereby notified 
>> that any review, dissemination, distribution, or duplication of this 
>> communication is strictly prohibited. If you are not the intended recipient, 
>> please contact the sender by reply email and destroy all copies of the 
>> original message.
>> 
>> Please help reduce paper and ink usage. Print only if necessary.
>> 
>> 
>> On Sat, Nov 21, 2020 at 2:46 PM Wayne Burdick  wrote:
>> 
>> > On Nov 21, 2020, at 1:38 PM, William Hein  wrote:
>> > 
>> > The K4D looks like an amazing radio! I am interested in diversity rx,
>> > primarily on 50 MHz. A few questions:
>> > 
>> > (1) Are the two K4D receivers phase coherent (in sync)?
>> 
>> Yes.
>> 
>> 
>> > 
>> > (2) What is the resolution of the HDMI video output?
>> 
>> Up to 4K.
>> 
>> 
>> > 
>> > (3) Will the Ref In work with something like the Bodnar GPS reference 
>> > clock?
>> 
>> REF IN requires a 10 MHz signal, not a GPS pulse.
>> 
>> 
>> 73,
>> Wayne
>> N6KR
>> 

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Re: [Elecraft] Arecibo antenna collapses

[Alan Bloom]

On 12/2/2020 9:06 AM, j...@kk9a.com wrote:
I concur, it is sad that Arecibo will not be rebuilt. The director of 
operations is WP3R.  I worked him in the Sweepstakes contest a couple 
of weeks ago.


Yes, I met Sr. Vazquez WP3R when I visited Arecibo during a bicycle tour 
5 years ago.  A really nice guy.  He gave me a guided tour of the facility:


http://n1al.net/bike/pr_tour/day11.htm

So sad that the Arecibo dish is no more!

Alan N1AL


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[Elecraft] K3s / P3 For Sale

[William C. Johnson via Elecraft]

For Sale Elecraft K3s with P3/SVGA

$2995.00 USPS Money Order
Split Shipping to Lower 48Negotiate Other Shipping
Serial #10939

K3s 100 watt - KAT3A internal tuner
Filters: Slot #1 INRAD 13 KHZ  - Slot #2 open - Slot #3 KFL3A  2.7 KHZ Elecraft 
 Slot #4 KFL3A  2.1 KHZ Elecraft by INRAD  - Slot #5 KFL3A  500HZ Elecraft  
KBPF3A General Coverage Receiver

Elecraft Factory Box for K3s
MH-4 Microphone
K3s connecting cables to P3
P3 with SVGA Card 
Documentation 
Bill K7BRR


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Re: [Elecraft] Kinda cool graphic of solar activity

[Dave Cole]

THANK YOU for that link!  I saw a post, and emptied my trash on a 
different list, and deleted the post, then closed my browser...  I have 
been looking for it for a bit!


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 8:35 AM, Michael Walker wrote:

If you really want to learn about the Solar Forecast, watch this.

This is all new science to solar storms and the talk directly impacts HF
operators.

I won't spoil the ending, but if you want to see 10M open 24 hrs/day, it is
worth watching.

https://youtu.be/lRNJPkQPo_g

Mike va3mw


On Wed, Dec 2, 2020 at 11:17 AM Louandzip via Elecraft <
elecraft@mailman.qth.net> wrote:


 From ESA

http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2020/11/soho_25_years_of_solar_imaging/22352502-1-eng-GB/SOHO_25_years_of_solar_imaging_pillars.jpg
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Re: [Elecraft] K4D questions - diversity, HDMI, Ref In

[William Hein]

Wayne,

Back to the phase locked receivers in the K4D. Does the K4HD retain this
feature? I am wondering if the Superhet circuitry would mess up the phase
coherence? If so, is there a way to bypass the K4HD Superhet circuits when
not (for example) operating in a HF contest M2 or MM?

73
Bill AA7xT


*Bill Hein*
*Sound Business Strategies, LLC*
*m 970-628-5120*
*b...@soundbusiness.us *



*The information contained in this transmission may contain privileged and
confidential information, including patient information protected by
federal and state privacy laws. It is intended only for the use of the
person(s) named above. If you are not the intended recipient, you are
hereby notified that any review, dissemination, distribution, or
duplication of this communication is strictly prohibited. If you are not
the intended recipient, please contact the sender by reply email and
destroy all copies of the original message.*
*Please help reduce paper and ink usage. Print only if necessary.*


On Sat, Nov 21, 2020 at 5:53 PM Wayne Burdick  wrote:

> Then yes, this should work. I had assumed it was producing a 1-Hz square
> wave.
>
> Wayne
>
> 
> elecraft.com
>
> On Nov 21, 2020, at 3:20 PM, William Hein  wrote:
>
> 
> Hi, Wayne!
>
> I'm very happy about the phase sync between the two rxs, that will be a
> lot of fun!
>
> FYI - The Bodnar GPS unit outputs a programmable output including 10 MHz
> at various levels:
>
> Low-jitter GPS-locked precision frequency reference
> 450 Hz to 800 MHz output
>
> This device outputs two synchronised low-jitter reference clocks locked to
> GPS signal.
>
> Long term stability of output signal is defined by high accuracy of GPS
> Caesium references and theoretically approaches 1x10-12.
>
> Short term signal quality is defined by internal TCXO clock source
> providing high-quality, low phase noise clock signal with sub-picosecond
> RMS jitter.
>
> Digital PLL allows main output reference frequency to have almost any
> value between 450Hz and 800MHz.
>
> The second output frequency depends on the first output due to a common
> internal clock, if you need individual flexibility, multiple mini GPS units
> may be a better choice. If both outputs have the same frequency their
> relative phase shift can be adjusted. This can be used, for example, to
> generate two signals with 90° phase shift for use in I/Q mixer.
>
> Both output signals square wave at 3.3V CMOS levels with 50 Ohms
> characteristic impedance. Their output drive levels can be adjusted and
> outputs can be enabled and disabled independently.
>
> Output power level (measured at 10MHz, fundamental power channel):
> +13.3dBm, drive setting 32mA
> +12.7dBm, drive setting 24mA
> +11.4dBm, drive setting 16mA
>
> *Bill Hein*
> *Sound Business Strategies, LLC*
> *m 970-628-5120*
> *b...@soundbusiness.us *
>
>
>
> *The information contained in this transmission may contain privileged and
> confidential information, including patient information protected by
> federal and state privacy laws. It is intended only for the use of the
> person(s) named above. If you are not the intended recipient, you are
> hereby notified that any review, dissemination, distribution, or
> duplication of this communication is strictly prohibited. If you are not
> the intended recipient, please contact the sender by reply email and
> destroy all copies of the original message.*
> *Please help reduce paper and ink usage. Print only if necessary.*
>
>
> On Sat, Nov 21, 2020 at 2:46 PM Wayne Burdick  wrote:
>
>>
>> > On Nov 21, 2020, at 1:38 PM, William Hein 
>> wrote:
>> >
>> > The K4D looks like an amazing radio! I am interested in diversity rx,
>> > primarily on 50 MHz. A few questions:
>> >
>> > (1) Are the two K4D receivers phase coherent (in sync)?
>>
>> Yes.
>>
>>
>> >
>> > (2) What is the resolution of the HDMI video output?
>>
>> Up to 4K.
>>
>>
>> >
>> > (3) Will the Ref In work with something like the Bodnar GPS reference
>> clock?
>>
>> REF IN requires a 10 MHz signal, not a GPS pulse.
>>
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
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Re: [Elecraft] Arecibo antenna collapses

[Andrew Faber via Elecraft]

This is certainly getting way off topic on the Elecraft reflector, but I can’t 
resist mentioning that I have visited the FAST telescope in Guizhou Province.  
Here is a brief explanation from my trip notes (we were guests because my wife 
is an astronomer with many Chinese colleagues).  It’s odd that they are 
creating a tourist destination, since normally such telescopes are located to 
minimize RFI.

“We were met by a driver from FAST in a Honda Odyssey for the two-hour drive to 
Pingtang, China’s self-proclaimed “Astronomy City.”  There is a huge amount of 
new construction, as they try to take advantage of the FAST to create a tourist 
destination. There are new shops and hotels being built, and on the sides of 
the roads they even have statues and bas reliefs of famous scientists and 
scientific instruments.  FAST stands for “Five hundred meter Aperture Spherical 
radio Telescope,” and that’s just what it is – outdoing the 300-meter radio 
telescope at Arecibo, Puerto Rico by far.  It’s in a valley that had a dozen or 
so homes before they houses were demolished.  It’s 500 meters across, and is 
partly steerable, since the panels can be somewhat deformed by 4,000 actuators 
pulling on cables that tug on the panels that comprise the reflective surface.  
The receiving “cabin” is suspended on cables attached to six huge (maybe 
350-400 feet tall) towers.  So by moving the cabin and pulling on cables, they 
can apparently track through about 20 degrees, unlike Arecibo, which is fixed 
in a spherical shape.  The actuators that deform the mirror into a parabola are 
hydraulic and need only pull about a foot and a half or so on each cable.  
Although it was late, we drove down for a quick look at the telescope, since it 
wasn’t raining.  It’s an unbelievably impressive mechanical construct.  

73, andy ae6y

Sent from Mail for Windows 10

From: AB2E Darrell
Sent: Wednesday, December 2, 2020 8:54 AM
To: Elecraft Refl
Subject: Re: [Elecraft] Arecibo antenna collapses

I

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Re: [Elecraft] Arecibo antenna collapses

[AB2E Darrell]

It will indeed be  interesting to see if Arecibo is rebuilt.
However, the Chinese have built and opened one twice the capacity of Arecibo 
and it is open to the scientific community of the world.
This was posted by Steve WX2S on another reflector.
73 Darrell AB2E

https://www.nature.com/articles/d41586-019-02790-3

[https://media.nature.com/lw1024/magazine-assets/d41586-019-02790-3/d41586-019-02790-3_17178388.jpg]
Gigantic Chinese telescope opens to astronomers 
worldwide
FAST has superior sensitivity to detect cosmic phenomena, including fast radio 
bursts and pulsars.
www.nature.com



From: elecraft-boun...@mailman.qth.net  on 
behalf of Grant Youngman 
Sent: Wednesday, December 2, 2020 11:47 AM
To: Elecraft Refl 
Subject: Re: [Elecraft] Arecibo antenna collapses

I suppose the question is why not rebuild it if the capability (or an upgraded 
capability) remains of consequential value to the scientific community and 
there is no existing capability that can be cobbled together elsewhere to match 
it.  I don’t know what it would cost, but consider that one Virginia-class 
submarine costs well over $3B.  We build those, even if it is in small numbers. 
 It’s a matter of priorities … and pretty small $$ in the big picture.

Grant NQ5T

> On Dec 2, 2020, at 11:06 AM, j...@kk9a.com wrote:
>
> I concur, it is sad that Arecibo will not be rebuilt. The director of 
> operations is WP3R.  I worked him in the Sweepstakes contest a couple of 
> weeks ago.
>
> John KK9A
>
> Michael Walker va3mw wrote:
>
> Sorry, not funny.
>
> Arecibo was a great site and there are a number of Hams that are part of
> the dish and who were employed thanks to the installation.
>
> It is a pretty sad day, not only for the loss of technology, but also their
> livelihood.
>
> Mike va3mw
>
>

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[https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png]
 Virus-free. 
www.avg.com
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Re: [Elecraft] Arecibo antenna collapses

[Grant Youngman]

I suppose the question is why not rebuild it if the capability (or an upgraded 
capability) remains of consequential value to the scientific community and 
there is no existing capability that can be cobbled together elsewhere to match 
it.  I don’t know what it would cost, but consider that one Virginia-class 
submarine costs well over $3B.  We build those, even if it is in small numbers. 
 It’s a matter of priorities … and pretty small $$ in the big picture.

Grant NQ5T

> On Dec 2, 2020, at 11:06 AM, j...@kk9a.com wrote:
> 
> I concur, it is sad that Arecibo will not be rebuilt. The director of 
> operations is WP3R.  I worked him in the Sweepstakes contest a couple of 
> weeks ago.
> 
> John KK9A
> 
> Michael Walker va3mw wrote:
> 
> Sorry, not funny.
> 
> Arecibo was a great site and there are a number of Hams that are part of
> the dish and who were employed thanks to the installation.
> 
> It is a pretty sad day, not only for the loss of technology, but also their
> livelihood.
> 
> Mike va3mw
> 
> 

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Re: [Elecraft] KPA500/KAT500 and RTTY

[Dave Cole]

Thanks sir...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 12/2/20 8:24 AM, Gordon LaPoint wrote:

Dave,

I have done many RTTY contests and regular qso's using the 
KPA500/KAT500/K3 over the last few years. I run full 500 watts with no 
problems, the temp gets up to the 60 to 65 range a lot when calling CQ 
in a contest, or during a 10 minute tx.  If the temp gets to 70 then the 
fan kicks into high gear and is very noisy, but still within specs.

Gordon - N1MGO

On 12/2/2020 9:57 AM, Dave Cole wrote:

Hi,

Any recommendations as to the max power I might run using a KPA500 and 
KAT500, on say, a three to five minute transmission?


Also, what is the recommended max temp for the PA on this device as 
measured by the KPA500?




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Re: [Elecraft] Kinda cool graphic of solar activity

[Michael Walker]

If you really want to learn about the Solar Forecast, watch this.

This is all new science to solar storms and the talk directly impacts HF
operators.

I won't spoil the ending, but if you want to see 10M open 24 hrs/day, it is
worth watching.

https://youtu.be/lRNJPkQPo_g

Mike va3mw


On Wed, Dec 2, 2020 at 11:17 AM Louandzip via Elecraft <
elecraft@mailman.qth.net> wrote:

> From ESA
>
> http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2020/11/soho_25_years_of_solar_imaging/22352502-1-eng-GB/SOHO_25_years_of_solar_imaging_pillars.jpg
> __
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>
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> Message delivered to va...@portcredit.net
>
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Re: [Elecraft] KPA500/KAT500 and RTTY

[Gordon LaPoint]

Dave,

I have done many RTTY contests and regular qso's using the 
KPA500/KAT500/K3 over the last few years. I run full 500 watts with no 
problems, the temp gets up to the 60 to 65 range a lot when calling CQ 
in a contest, or during a 10 minute tx.  If the temp gets to 70 then the 
fan kicks into high gear and is very noisy, but still within specs.

Gordon - N1MGO

On 12/2/2020 9:57 AM, Dave Cole wrote:

Hi,

Any recommendations as to the max power I might run using a KPA500 and 
KAT500, on say, a three to five minute transmission?


Also, what is the recommended max temp for the PA on this device as 
measured by the KPA500?




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Re: [Elecraft] Used antenna - Arecio antenna collapses

[Drew AF2Z]

Tragic. Anyone who has visited it in the past will be saddened to see 
its condition now.


I was there in the 80's. I went on a lark, traveling by "publico" from 
San Juan where my ship was docked for a few hours. I had trouble even 
finding the place until I found out it was referred to by locals as 
"Esperanza radar". The trip and the view were memorable; seeing that 
gleaming-white symbol of advanced technology filling the valley was so 
impressive!


I used to tell people traveling to Puerto Rico to make sure and see 
Arecibo. Now I guess I can tell them to go see the ruins.



73,
Drew
AF2Z



On 12/02/20 10:12, Michael Walker wrote:

Sorry, not funny.

Arecibo was a great site and there are a number of Hams that are part of
the dish and who were employed thanks to the installation.

It is a pretty sad day, not only for the loss of technology, but also their
livelihood.

Mike va3mw


On Wed, Dec 2, 2020 at 9:01 AM weave...@usermail.com 
wrote:


EME (Earth - Mars - Earth) ? :-)

73,
Bill WE5P

Comfortably Numb


On Dec 2, 2020, at 08:43, Dave Sublette  wrote:

Pick up only.  Bring a big truck.

K4TO


On Wed, Dec 2, 2020 at 5:52 AM Douglas Hudson 

wrote:


If you want a good buy on a used, high gain antenna, the Arecibo radio
astronomy antenna will soon be up for grabs.  Sold as is, where is.

Some

assembly required.




https://www.npr.org/2020/12/01/940767001/arecibo-observatory-telescope-collapses-ending-an-era-of-world-class-research



Doug
K7CUU
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[Elecraft] Kinda cool graphic of solar activity

[Louandzip via Elecraft]

>From ESA
http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2020/11/soho_25_years_of_solar_imaging/22352502-1-eng-GB/SOHO_25_years_of_solar_imaging_pillars.jpg
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Re: [Elecraft] Arecibo antenna collapses

[john]

I concur, it is sad that Arecibo will not be rebuilt. The director of  
operations is WP3R.  I worked him in the Sweepstakes contest a couple  
of weeks ago.


John KK9A

Michael Walker va3mw wrote:

Sorry, not funny.

Arecibo was a great site and there are a number of Hams that are part of
the dish and who were employed thanks to the installation.

It is a pretty sad day, not only for the loss of technology, but also their
livelihood.

Mike va3mw


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[Elecraft] Arecibo radio telescope

[John Gibson]

For another perspective on the loss of the Arecibo radio telescope, see

https://tinyurl.com/y4u3dm88

73,

John Gibson, no8v
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Re: [Elecraft] KX2 & FT8

[Rich NE1EE]

Rick,
Thanks for the post. I don't need real time "time" for things these days...if I 
do, I turn to an RTOS...but I am naive in this area.
Since reconfiguring my Windows time specs, including not using the windows.time 
server, I have not seen a time offset exceeding 0.5s...in fact, the highest I 
recall is 0.3s...that is 10X the error you report for Meinberg

I visited the site, and found
https://www.meinbergglobal.com/english/info/ntp.htm
https://www.meinbergglobal.com/english/sw/ntp.htm#ntp_stable

so it appears that there is a software-only solution? I don't need to support 
one more piece of hardware, because my timing needs are not that great now. 
Thanks for the suggestion...I had not heard of Meinberg previously.

~R~
72/73 de Rich NE1EE
The Dusty Key
On the banks of the Piscataqua

On 2020-12-01 16:46:-0800, Rick Bates, NK7I wrote:
>Rich,
>You WANT to change what Windows does because a generation ago, to allow their 
>server software to function, they increased the error gap in the NTP system.�  
>It allows WAY too much drift and they've never cleaned that up (because most 
>users don't care).
>
>I use and suggest Meinberg; which can replace the Windows NTP service.�  It's 
>free and keeps my computers within .03 seconds to standard (on very slow 
>Internet) without requiring high overhead (it just works and well).
>
>73,
>Rick NK7I

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Re: [Elecraft] Used antenna - Arecio antenna collapses

[Michael Walker]

Sorry, not funny.

Arecibo was a great site and there are a number of Hams that are part of
the dish and who were employed thanks to the installation.

It is a pretty sad day, not only for the loss of technology, but also their
livelihood.

Mike va3mw


On Wed, Dec 2, 2020 at 9:01 AM weave...@usermail.com 
wrote:

> EME (Earth - Mars - Earth) ? :-)
>
> 73,
> Bill WE5P
>
> Comfortably Numb
>
> > On Dec 2, 2020, at 08:43, Dave Sublette  wrote:
> >
> > Pick up only.  Bring a big truck.
> >
> > K4TO
> >
> >> On Wed, Dec 2, 2020 at 5:52 AM Douglas Hudson 
> wrote:
> >>
> >> If you want a good buy on a used, high gain antenna, the Arecibo radio
> >> astronomy antenna will soon be up for grabs.  Sold as is, where is.
> Some
> >> assembly required.
> >>
> >>
> >>
> https://www.npr.org/2020/12/01/940767001/arecibo-observatory-telescope-collapses-ending-an-era-of-world-class-research
> >>
> >>
> >> Doug
> >> K7CUU
> >> __
> >> Elecraft mailing list
> >> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> >> Help: http://mailman.qth.net/mmfaq.htm
> >> Post: mailto:Elecraft@mailman.qth.net
> >>
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> >> Message delivered to k...@arrl.net
> >>
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[Elecraft] KPA500/KAT500 and RTTY

[Dave Cole]

Hi,

Any recommendations as to the max power I might run using a KPA500 and 
KAT500, on say, a three to five minute transmission?


Also, what is the recommended max temp for the PA on this device as 
measured by the KPA500?


--
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
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Re: [Elecraft] Used antenna - Arecio antenna collapses

[weave...@usermail.com]

EME (Earth - Mars - Earth) ? :-)

73,
Bill WE5P

Comfortably Numb

> On Dec 2, 2020, at 08:43, Dave Sublette  wrote:
> 
> Pick up only.  Bring a big truck.
> 
> K4TO
> 
>> On Wed, Dec 2, 2020 at 5:52 AM Douglas Hudson  wrote:
>> 
>> If you want a good buy on a used, high gain antenna, the Arecibo radio
>> astronomy antenna will soon be up for grabs.  Sold as is, where is.  Some
>> assembly required.
>> 
>> 
>> https://www.npr.org/2020/12/01/940767001/arecibo-observatory-telescope-collapses-ending-an-era-of-world-class-research
>> 
>> 
>> Doug
>> K7CUU
>> __
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Re: [Elecraft] Used antenna - Arecio antenna collapses

[Dave Sublette]

Pick up only.  Bring a big truck.

K4TO

On Wed, Dec 2, 2020 at 5:52 AM Douglas Hudson  wrote:

> If you want a good buy on a used, high gain antenna, the Arecibo radio
> astronomy antenna will soon be up for grabs.  Sold as is, where is.  Some
> assembly required.
>
>
> https://www.npr.org/2020/12/01/940767001/arecibo-observatory-telescope-collapses-ending-an-era-of-world-class-research
>
>
> Doug
> K7CUU
> __
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[Elecraft] Used antenna - Arecio antenna collapses

[Douglas Hudson]

If you want a good buy on a used, high gain antenna, the Arecibo radio 
astronomy antenna will soon be up for grabs.  Sold as is, where is.  Some 
assembly required.

https://www.npr.org/2020/12/01/940767001/arecibo-observatory-telescope-collapses-ending-an-era-of-world-class-research


Doug
K7CUU
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Re: [Elecraft] KX3 turns itself off randomly.

[Adrian]

Looking through archives for Elecraft , I found this ;

http://elecraft.365791.n2.nabble.com/KX3-Shutdown-td7593697.html

It matches my setup and symptoms. I will turn the PA parameter off,

and test without the KXPA100 online.


Adrian Fewster



On 1/12/20 12:58 am, David Haines wrote:
I had that same problem.  Check that you haven't set the timer to turn 
off the radio after a certain period.


david
KC1DNY


On 11/30/2020 7:01 AM, Adrian wrote:
I have a KX3 that sometimes just turns off, after sitting idle. and 
sometime 2-3 beeps are heard prior.


Have done much googling and can't find this scenario. Has anyone seen 
this   ?


Power supply is good at 15v solid from a battery bank, so there is no 
supply power interruption.


It may turn off after 1/2 hour, and subsequently 2 hours or not at 
all, but seems to happen not long after first powerup.


There is also a KXPA100 connected on the same power supply.


Adrian Fewster


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