I think I overheard at Visalia that the KPA500 draws only 1 kW from the
AC power line with 500W out. It uses a high-efficiency toroidal power
transformer. I doubt that a switching power supply would do any better
than that.
The total weight is about 22 pounds I believe. Less than many
How would $400-450 for a 200-300w linear sound?
I am building up such a linear amp 12w -- 200w on 2-30 MHz. If it
tests out well, I am thinking their may be a market for this. I
understand that the FCC has to accept the unit, but I wonder if it is
only available as a kit if that applies?
Fellow Elecrafters:
Normally I don't enter into conversations like this one. In this case I feel
obligated.
I have known Don, through the reflector for many years. He is probably the
largest source of Elecraft knowledge on the reflector. He is also a gentleman.
In the many years I
Switching supply can do much better than 50% efficiency, I've designed
several for use in PA's that are close to 95% efficient. The
dominating inefficiency is usually in the PA
Matt
W8ESE
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I will back you up 300% Alan.
Don is a clear example of a gentleman,he is not only the most trustable source
of information on Elecraft radios but also a decent business man,I had the
chance once in the past to let him tune my K2 and he did a great job in a short
time and with a decent
Ok, I can finally get to the site to comment...I did my inventory on the K1
when it arrived, but missed the filter board. Elecraft promptly sent me a
new one (yea) While waiting, I built part of the front panel but got to the
point in the build (lcd backlight) where I need to hook up to the
I did a calculation of how many feet of heavy gauge wire would be
required to do this grounding.
Glad it isn't necessary.
For some stations one would be talking thousands of feet of wire to tie
all the RX antenna grounds to the mains ground.
One wants to keep the RX antennas well away from TX
Hi,
Is it ok to have a K3 inside hand luggage on US flights? Or can one have
problems with TSA?
73 TU,
Felipe - PY1NB
--
Felipe Ceglia - PY1NB
-
PR1T team member /// Rio DX Group member /// Araucaria DX Group
I have a wheeled carrier for my K3 and laptop. Take both out for the x-ray
machine. No problems to date.
Tony
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Felipe Ceglia - PY1NB
Sent: Monday, April 19, 2010 8:25 AM
To:
So did anyone get any video or more info on the P3 over the weekend?
Tnx es 73,
LS
W5QD
--
View this message in context: http://n2.nabble.com/P3-tp4914382p4924961.html
Sent from the [K3] mailing list archive at Nabble.com.
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We have one seat left open at our table, so far we have: W5MX and wife,
WB8JUI, AB4GG, W4KRY, WF7T, UA3AGW, NP3D and N2WN...
This happens Saturday night. If anyone would like to join us, please contact
me off list.
Hope to see a bunch of fellow Elecrafter's there, and think we'll be adding
one
What a sad and angering situation to find when Rose and
I checked into a motel on the way home from Visalia and
logged on for our e-mail. I've stewed about the issue most
of the night.
A post from Don, regardless of subject, was a -must- read.
There's almost always learning to be gleaned and
I am building up such a linear amp 12w -- 200w on 2-30 MHz.
If it
tests out well, I am thinking their may be a market for
this. I
understand that the FCC has to accept the unit, but I wonder
if it is
only available as a kit if that applies? This is a 28-volt
transistor so a 28 volt 20A supply
Is there some obvious reason why the FCC chose 15dB as the gain limit?
73
jim ab3cv
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While I don't have any desire for a KPA500, I am EXTREMELY happy that it is
in the pipeline because I can continue holding out hope that Elecraft's RD
continues on a KPA1500...which is the one I can't wait to buy. My pair of
Alpha 76CAs are getting long in the tooth and if the KPA500 sells like
Jim -
I believe it was to make CB amps illegal and unprofitable. Also, Ham amps
were not permitted to operate on 10 meters for the same reason - to make
them unattractive to CB operators.
Monty K2DLJ
Is there some obvious reason why the FCC chose 15dB as the gain limit?
73
jim ab3cv
Don,
You are indeed correct...thanks for enlightening me!
--
View this message in context:
http://n2.nabble.com/K1-LED-backlight-anode-annotation-tp4917968p4925395.html
Sent from the [K1] mailing list archive at Nabble.com.
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2SC372Y and 2SK19GR
OR
NTE85 and NTE133 (same pair cross referenced to NTE
Into a common part that I could get at RF Parts?
These are old FT101 FET's and they might be common under some
newer name.
Thanks,
Don
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Ken Kopp wrote:
I've 'stewed' about the issue most
of the night.
Me too, Ken. Don helped me a lot when I was assembling my KX1 and K2.
The impatient K2 builder says he doesn't care at all about feelings; yet he
also claims
to have an EET degree. I taught for many years in a community
The 15 dB gain limitation made more sense when Part 97.317 included a
companion restriction of requiring not less than 50-watts drive power to
attain the amp's rated output power. If a Part 95 user had the wherewithal
to somehow modify a recently manufactured QRP-input type amp, 15 dB still
Hello all:
Perhaps I missed it in earlier discussions but can anyone tell me
what bands the KPA500 will cover? I assume 160 is the low end but will it
cover 6 meters as well? Thanks. Chris Patterson W3CMP
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Elecraft
I believe that TSA requires laptops, digital movie cameras, and other large
electronics items to be removed from their carrying cases and placed in a
separate bin to go through xray. practices vary a little from airport to
airport, but it certainly does not hurt to at least inform TSA what's
On 4/19/2010 7:46 AM, w3...@aol.com wrote:
Hello all:
Perhaps I missed it in earlier discussions but can anyone tell me
what bands the KPA500 will cover? I assume 160 is the low end but will it
cover 6 meters as well? Thanks. Chris Patterson W3CMP
Yes, it covers 1.8 - 54 MHz.
--
My experience with the K3 as hand luggage has been good. I have been taking
my K3 to and from Aruba for 2 1/2 years. At SFO, about half the time I have
to take it out of the backpack for it to be checked. They then swab it
briefly for explosives and usually run it through the x-ray machine
Hi Don from Mike WB9GZL (K2 #4206). I don't always have the time to read the
Elecraft email reflector each day, and I just stumbled across your
week-old-or-so post looking to sell your SCAF-1. I would be interested if you
still have it. Thanks Don, and thanks too for your contributions to the
Thanks to Bob, N6TV, there are some good quality photos of the KPA500
available here and ff.
http://picasaweb.google.com/lh/sredir?uname=rawilsontarget=PHOTOid=5461795475230448002aid=5461794434122956513authkey=Gv1sRgCIb8gL7YncDB2gEfeat=email
73, doug
And too quiet!
It would not be advisable to operate a linear supply in close proximity to
the K3 or the K2. The resulting unwanted modulations have been discussed
previously.
Jerry AI6L
-Original Message-
From: Bob McGraw - K4TAX [mailto:rmcg...@blomand.net]
Sent: Sunday, April 18,
On Sun, 18 Apr 2010 19:00:26 -0400, Bill Coleman wrote:
There are hair dryers that draw more current than this. At 1500 watt draw is
not unreasonable from a 120v outlet.
Yes and no. The current drawn by power supplies is NOT sinusoidal, it is a
series of pulses at the positive and negative
On 4/19/2010 9:05 AM, Jerry T. Dowell wrote:
And too quiet!
It would not be advisable to operate a linear supply in close proximity to
the K3 or the K2. The resulting unwanted modulations have been discussed
previously.
Obviously I haven't tried it (!) but I suspect that the external
The seat has been spoken for...
Thanks!
-
Julius Fazekas
N2WN
Tennessee Contest Group
http://www.k4ro.net/tcg/index.html
Tennessee QSO Party
http://www.tnqp.org/
Elecraft K2/100 #4455
Elecraft K3/100 #366
Elecraft K3#1875
--
View this message in context:
I don't understand the too quiet comment, if it's intended to be
serious.
As for the unwanted modulations, that's probably why they've chosen
a toroidal power transformer.
73
--
Joe KB8AP
On Apr 19, 2010, at 9:05 AM, Jerry T. Dowell wrote:
And too quiet!
It would not be advisable to
Okay, enough is enough.. This has become SO out of control for no reason!
Why do you feel that it's necessary to send this out to the group No one
said that there was anything wrong with Don or how helpful he his. Don made a
simple mistake of outing someone's call sign and name on the
On Sun, 18 Apr 2010 19:00:19 -0400, Bill Coleman wrote:
I found that putting a snap-on ferrite core around the power cord reduced
the spur to an S5 indication. A similar reduction could be had by placing
snap-on ferrite around the power output leads.
Study my tutorial on RFI and ferrites.
Kits for sale by are specifically -included- in the FCC certification
requirements.
73, Eric WA6HHQ
On 4/19/2010 7:50 AM, Paul Christensen wrote:
As to HF amp kits requiring certification, I see no dispositive section in
the CFR that affirmatively compels certification of a kit for
I sold most of my ham gear, including my K2/100 and KAT100 in EC2 case, 2+
years ago to take up motorcycling. Now, I've gotten back into ham radio and
purchased another K2/100. Started back reading the Reflector and enjoying
the most-helpful posts of Don Wilhelm. Now, this mess happens; I
On Sun, 18 Apr 2010 16:16:58 -0400, Terry Posey wrote:
ALS600 with the Linear Power supply, AD5X Full Break In mod and an
external bandswitching accessory plus an MFJ998 would come in considerably
under the $2,000 price.
Do I understand that you are equating MFJ with Elecraft? That's quite a
It is not jacketed, but submersible water pump wire is often twisted
and in sizes as large as one could reasonably wish. Here is one
example:
http://www.deanbennett.com/submersible-pump-wire.htm
David K0LUM
At 9:37 AM -0700 4/19/10, Jim Brown wrote:
Another point. It has LONG been known
G! This is driving me nuts. Don did NOT out someones call!!!
The person in question put his callsign in the subject line of the
message. Foxjazz did that himself. Don didn't do it. All Don did
was look up the call on QRZ.com to associate a name with the call.
I WILL continue to
As if it's your duty to do that
NOT
I didn't realize your name was ERIC
NOT
So it wasn't up to you to point anything out !Was it ?
IF there is a lesson to be learned here, open your eyes and realize it's
you that should be learning.
73 JerryN0JRN
On
Guys - Let's end this thread and all related ones now.
73, Eric
Elecraft List Moderator
(I go out of town for a show and the list goes crazy! ;-)
On 4/19/2010 9:37 AM, The Smiths wrote:
Okay, enough is enough.. This has become SO out of control for no reason!
Don will be back shortly. :-) We all have 'bad hair days' and
occasionally hit 'send' too quickly.
Folks, As just posted, this thread is now ended.
(Mus be the lack of sunspots that has people going a little crazy.. ;-)
73, Eric
Elecraft List moderator
On 4/19/2010 9:52 AM, Mark -
Folks - PLEASE, no more postings on this subject.
73, Eric
Elecraft List Moderator - really!
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Post:
Wow. After looking at all those photos I think I'm going to go on a diet. (I
can't do a thing about the being old part).
Wes N7WS
--- On Mon, 4/19/10, Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com wrote:
From: Doug Faunt N6TQS +1-510-655-8604 fa...@panix.com
Subject: [Elecraft] Good
Another solution is to take the zip cord and pull it apart, chuck two
ends
in a variable speed drill and turn slowly, it will make a very nice
twisted
pair out of any guage. Just be sure to use a length longer than what
you need
as it looses length as it is twisted of course.
To keep it in
Here are a few Visalia 2010 photos of the P3 and KPA500 taken by Bo
N7BK:
http://pbckt.com/sQ.dJyP
73 and enjoy
Tony VE3QF
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Help:
On Apr 19, 2010, at 8:34 AM, Vic K2VCO wrote:
Yes, it covers 1.8 - 54 MHz.
AND if you press the band button on the KPA500, it will also switch the band on
the K3.
73 - Steve WB6RSE
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Jim Brown wrote
I just returned from Visalia. The exhibit hall included large booths
showing Icom and Yaesu rigs. The Elecraft booth was JAMMED from the minute
the doors opened until they closed. The Yaesu and Icom booths had only
modest traffic, and were oftn next to deserted.
Now THAT is
Eric:
The term kit has indeed been omitted from the rule. I had to take another
look at the rule and track the changes of the CFR. Before mid-2006, Section
2.815(b) had read:
(b) After April 27, 1978, no person shall manufacture, sell or lease, offer
for sale or lease (including advertising
Band switching - Now that is a great feature.
Gary
vk4fd
On Tue, Apr 20, 2010 at 3:41 AM, wb6r...@mac.com wrote:
On Apr 19, 2010, at 8:34 AM, Vic K2VCO wrote:
Yes, it covers 1.8 - 54 MHz.
AND if you press the band button on the KPA500, it will also switch the
band on the
A button for TUNE and a Hold for ANT might suggest a post KPA500 Tuner with
Antenna Switching.
73,
Dick - KA5KKT
Here are a few Visalia 2010 photos of the P3 and KPA500 taken by Bo
N7BK:
Ooops...make that ATU, not Tune.
A button for TUNE and a Hold for ANT might suggest a post KPA500 Tuner with
Antenna Switching.
73,
Dick - KA5KKT
Dick,
IF the Remote Tuner becomes a reality, I wonder if it will handle Balanced
AND Unbalanced feedline?
I would be VERY hopeful that it would.
For my type of operation it would be Heaven Sent
Oh well, back to dreaming of the futureand setting aside some more
Pennies into my E -
I'm hearing birdies in the following frequencies:
28.443
21.273,1
14.186.6 (the most important one with s3)
7.068.5
3.583,2/3.786.0
Also I've done the VCO calibration but the birdies in main and
sub.receiver remains.
S/N: 38xx.
Anybody has the same birdies, any advice to fix it?.
Advanced
Sorry about the cut paste error which resulted in the wrong subject line.
-Original Message-
From: Gary Hvizdak [mailto:garyhviz...@cfl.rr.com]
Sent: Monday 19 April 2010 1434
To: 'ea...@yahoo.es'
Cc: 'elecraft@mailman.qth.net'
Subject: RE: any advice to fix it?
On Mon Apr 19 2010 at
Yup - I read the same section again this morning. My discussions with
them have indicated that they now consider 'amplifier', as referred to
on their rules, to encompass any amplifier - kit or built.
We'll be offering the KPA-500 both ways. (FCC Certified.)
73, Eric WA6HHQ
On 4/19/2010
The P3 controls sure don't look simple to me. Then again, this may be the Ten
Tec version since it has Orion on it.
http://www.shutterpoint.com/Photos-ViewPhoto.cfm?id=668020
W3OU, Steve
-Original Message-
From: Al Lorona alor...@sbcglobal.net
To: elecraft@mailman.qth.net
Sent:
Thanks to Harry, WE1X, for letting me know of a similar button problem he had.
It is most likely my problem is not caused by the components I suspected, but
rather by the failure of the switch inside the encoder for Speed/Mic.
I was thinking only of the rubber-covered buttons, which cannot
Thanks for the interest, the seat has been spoken for...
Julius Fazekas
N2WN
Tennessee Contest Group
http://www.k4ro.net/tcg/index.html
http://groups.google.com/group/tcg1?hl=en
Tennessee QSO Party
http://www.tnqp.org/
Elecraft K2 #4455
Elecraft K3/100 #366
Elecraft K3/100
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Please help support this email list:
I have:
28.443 - (S3)
21.273 - (S4)
7.0685 +/- (S7)
3.580 + (S4)
Wes N7WS
--- On Mon, 4/19/10, Eugeni - EA3QP ea...@yahoo.es wrote:
From: Eugeni - EA3QP ea...@yahoo.es
Subject: [Elecraft] K3 birdies
To: elecraft@mailman.qth.net
Date: Monday, April 19, 2010, 12:19 PM
I'm hearing birdies
Hi Eugeni:
You can reduce and sometimes remove birdies just by moving the black
shielded cables around inside the radio. Remove the top cover, turn on the
power, tune the radio to a birdie, move the cables. I used some tape to hold
the longer cables in position once I found a good spot.
I
Thanks for the informative discourse on the FCC. My intent in my
original posting was to merely test the waters - see if the idea had
any interest or merit. I am building one of the CCI kits
(EB-27A). So this is not a new design approach. I wondered if there
might be interest being able to
Al Lorona wrote:
That is really pretty, but my prevailing thought was that perhaps
it's just too much eye candy-- which really doesn't make interpreting
the data any easier. The spectrum readout-- arguably the most
important area of the screen-- is difficult to concentrate on with
the
Nice looking amp! I'm curious about what the display is reading? And yes I
also see the ATU button in this photo, which I suppose may or may not be for
real...
73,
LS
W5QD
--
View this message in context:
http://n2.nabble.com/Good-photos-of-KPA500-tp4926192p4928301.html
Sent from the Elecraft
Hi Eric,
Might you add to our better understanding of the ATU button appearing on
the KPA 500 in some of the jpegs from Visalia?
Are you planning to offer an outboard companion tuner with the amp or
planning to support one of another vendor such a LDG?
Thanks in advance for any insight.
de
Yes, good questions.
If a tuner is in the works please have the amp automatically bypassed
when a tuning cycle takes place.
Rich - N5ZC
On 4/19/2010 5:48 PM, David and Dianne on Comcast wrote:
Hi Eric,
Might you add to our better understanding of the ATU button appearing on
the KPA 500 in
Thank you all for the replies!
73,
--
Felipe Ceglia - PY1NB
-
PR1T team member /// Rio DX Group member /// Araucaria DX Group member
http://www.dxwatch.com /// http://reversebeacon.net ///
sri, this is test message
Atsu, JE1TRV
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Help please - in this diagram, the bottom most drawing shows the Source Drain
and Gate in a triangle configuration.
http://www.nteinc.com/specs/100to199/pdf/nte133.pdf
Is the view from top down or looking from below the circle that is the
transistor case?
tia...
To Tom, Bill and all:
I never said anything about a direct strike. Don't bother trying to
protect for a direct strike. Nothing will survive a direct strike.
The problem is two ground points, separated by some distance of earth be it
5 ft, 50 ft or 500 ft. During a nearby strike the energy
Don Rasmussen wrote:
Help please - in this diagram, the bottom most drawing shows the Source Drain
and Gate in a triangle configuration.
http://www.nteinc.com/specs/100to199/pdf/nte133.pdf
Is the view from top down or looking from below the circle that is the
transistor case?
just
Don't bet on it. :-)
- Original Message -
From: Vic K2VCO v...@rakefet.com
Obviously I haven't tried it (!) but I suspect that the
external magnetic field from a
toroidal transformer is much less extensive than that of the
usual laminated type.
On Mon, 19 Apr 2010 19:36:29 -0500, Bob McGraw - K4TAX wrote:
Now, with the radio connected between the receiving
antenna and the AC mains, the path for the current difference is through the
radio and power supply.
I'm with Tom on this one. Here's why. First, remember that lightning is NOT
We've now recovered from the Visalia DX convention and have uploaded the
P3 Panadapter information page to the Elecraft web page.
The direct P3 info page link is:
http://www.elecraft.com/P3/p3.htm
73, Eric WA6HHQ
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Hi friends
today the K2 ATU behaved in crazy way. But that is another problem!
After 2 second tuning (always swr=5) , the k2 switched off.
I switched on again the radio but now the power control does not work.
In qrp mode it give 20 watts , in qro mode give 100 watts. no way to control
the power
Hi Tom,
Please expand on your comment. I had the same thought as Vic. Why
wouldn't a toroidal power transformer have less magnetic field
coupling to external circuits than a conventional E/I core transformer?
73
--
Joe KB8AP
On Apr 19, 2010, at 5:38 PM, Tom W8JI wrote:
Don't bet on it.
Refer to the NEC. It's their rule.
As a side note, a loss of property covered by insurance may be dissallowed
if they find improper grounding contributed to the damage. And they
reference the NEC with regard to proper.
73
Bob, K4TAX
- Original Message -
From: Jim Brown
Are the screen colors be user selectable?
--- On Mon, 4/19/10, Eric Swartz - WA6HHQ, Elecraft e...@elecraft.com wrote:
From: Eric Swartz - WA6HHQ, Elecraft e...@elecraft.com
Subject: [Elecraft] P3 Information Page now on Elecraft Web Page
To: Elecraft Reflector elecraft@mailman.qth.net
Not at this time.
73, Eric
On 4/19/2010 6:23 PM, Wes Stewart wrote:
Are the screen colors be user selectable?
--- On Mon, 4/19/10, Eric Swartz - WA6HHQ, Elecrafte...@elecraft.com wrote:
From: Eric Swartz - WA6HHQ, Elecrafte...@elecraft.com
Subject: [Elecraft] P3 Information Page
I noticed the other night while listening to the gran ole opry on the k3,
that when I pressed the a/b (keypad 1) button to switch to radio havana on
5970, got a longer beep and nothing happened.
But, when on a ham band, a/b worked fine.
Am I missing something, or is this a bug?
In this drawing the dashed line is a dimension line.
Paul K7PM
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for those of us who already first day ordered our P3s, when might we
anticipate their shipping?
Or, failing that, when might we see the P3 added to th shipping status page?
Not trying to rush things, just being curious.
73 de Dave, W5SV
Hi Fred,
I thought for quite awhile about what to do about vision-impaired users
of the P3. I couldn't think of any way that a blind or severely
visually-impaired person would be able to get any significant benefit
from a panadapter so I finally decided not to attempt to make it usable
by the
According to the order page:
http://www.elecraft.com/elecraft_prod_list.htm#k3
they start shipping July 15th.
Bob NW8L
On Mon, Apr 19, 2010 at 8:33 PM, David F. Reed w5sv.d...@gmail.com wrote:
for those of us who already first day ordered our P3s, when might we
anticipate their shipping?
All of the above (below actually) for me as well, but please, not just a 500W
model. Way too expensive. Looking at SGC's website as an example, a 500W
remote autotuner costs 3 times as much as a 100W model and twice as much as a
200W unit.
Maybe you can make power rating an option...with the
Hi Ken.
Do you think it is possible for Elecraft to acquire influence with a not yet
mature autotuner manufacturer and provide guidance in a manner beneficial to
Elecraft enthusiasts?
73,
Dick - KA5KKT
On Apr 19, 2010, at 12:37 PM, Jim Brown wrote:
On Sun, 18 Apr 2010 19:00:19 -0400, Bill Coleman wrote:
I found that putting a snap-on ferrite core around the power cord reduced
the spur to an S5 indication. A similar reduction could be had by placing
snap-on ferrite around the power
Very nicely done. Thanks for sharing the thought that went into it.
David Wilburn
NM4M
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Alan Bloom n...@cds1.net
Date: Mon, 19 Apr 2010 19:41:22
To: k6...@foothill.net
Cc: Elecraft Reflectorelecraft@mailman.qth.net
I wrote that statement, Jim:
I'm just stating my opinion that, in the big picture, the price point for
the KPA500 seems a bit on the high side for what you get. Now seeing
photos, its certainly better looking than my ALS600. And the build quality
is probably better than my Ameritron product,
This web page is intended for web designers, but is useful for designing any
color based user interface:
http://www.iamcal.com/toys/colors/
It lets a person with normal color vision see what people with various color
deficiencies see.
For example, when you check the various common anomalies
On Apr 19, 2010, at 11:56 PM, Kok Chen wrote:
Most users, unless they read the source code, probably doesn't know that
there is some method to the madness of the color scheme.
No, but those of us that have read the code in the process of writing our own
waterfalls appreciate the careful
On Mon, 19 Apr 2010 23:51:08 -0400, Luis V. Romero wrote:
Maybe I'm cheap, maybe not.
Almost all of us have had to get by with what we could afford for
most, if not all, of our lives, and most of us still do. I've been
a ham since 1955. The first rig I bought new was a Heath Apache in
1958
That version of PowerSDR is not optimized for panadapter use. Like
anything, there are a variety of SDR programs around. The latest
PowerSDR/IF Stage svn from WU2X W1CEG can fill the screen with just
the pan display (or waterfall or panafall). You can also add a
VFO/S-Meter strip and/or
On Mon, 19 Apr 2010 23:51:08 -0400, Luis V. Romero wrote:
Maybe I'm cheap, maybe not.
Certainly, for some of us, the small size is worth some premium.
Those who are comparing the KPA500 to a ALS-600 should take note that
it's less than 1/3 the volume, and about the same weight as the
Woohoo! Has a time line been set for when the P3's assembly manual will be
posted on the website?
k6osx
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