First off, I am not using an amplified speaker; it is a National
Receiver speaker from circa 1950's. I have used it with my FT-847
for years before getting the K3 (#4340) in 2010. Never popped like
the K3. In fact none of the ham radios that I have owned since my
first one in 1958 ever did
Please disregard. Am testing Gmail to Reflector.
--
73 de Dick, ka1oz
Elecraft K3/100
GAP Titan-DX Antenna
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[K3] FS: Elecraft K3/10-F. One week old. Bought new, factory assembled, on
August 26, 2011. The list of options is below. The K3 is in perfect
condition. Also includes a K3 Nifty Mini-Manual. Asking $2,350, delivered
and insured via USPS Priority Mail, CONUS only. USPS Money Order only.
Please
Can someone point me to the documentation for this modification? I
want to use my SCS Pactor modem with my K2 and was hoping to use the
mic jack for audio in AND out.
Thanks.
-Scott N3SW-
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Scott,
Take a look at the Fixed Audio Output mod on my website www.w3fpr.com.
There are no boards available now, but the circuit is easy enough to
assemble on perfboard (as I did for the prototype).
Additional suggestions:
If you lay the components down flat, the board can be mounted between
Happy Labor Day!
In anticipation of the upcoming price increases, I thought I'd add a P3 to my
K3 (#3497), but the order form will not accept any UPS options. It readily
accepts and of the postal service options. Am I the only one having this
problem?
73
Tom K4AEN
UPS was hacked over the weekend and still off-line. Not sure if this is a cause.
Howard..K2HK
From: k4...@me.com
Date: Mon, 5 Sep 2011 10:39:18 -0400
To: elecraft@mailman.qth.net
Subject: [Elecraft] UPS Shipping options not available?
Happy Labor Day!
In anticipation of the
For what it's worth there was an alert a few weeks back that someone
purchased a large quantity of UPS uniforms. The warning had to do with
being cautious/suspicious of any unexpected packages delivered to you.
As I said -- For what it's worth.
Tom
wb2qdg
K2 1103
On 9/5/2011 10:42 AM, Howard
On 09/04/2011 08:07 PM, Mark Bayern wrote:
I am aware of transformer supplies. I was referencing to switch-mode
supplies (transformer less). I believe they have isolation between
primary and secondary.
Without a transformer? How are they getting any galvanic isolation? The
transformer-less
I'm building KPA500 #370 for a friend. On p. 23 of the assembly manual,
2nd step says DMM should read same as if the probes are not touching
(10.0 Mohm), but all four readings are several hundred (300 - 600)
Kohms. Problem???
73,
Randy, KS4L
Never mind! I reversed the DMM leads and got the desired reading!
On 9/5/2011 10:05 AM, Randy Moore wrote:
I'm building KPA500 #370 for a friend. On p. 23 of the assembly
manual, 2nd step says DMM should read same as if the probes are not
touching (10.0 Mohm), but all four readings are
Have you tried reversing the leads? That often helps.
73,
Don W3FPR
On 9/5/2011 11:05 AM, Randy Moore wrote:
I'm building KPA500 #370 for a friend. On p. 23 of the assembly manual,
2nd step says DMM should read same as if the probes are not touching
(10.0 Mohm), but all four readings are
Hey Don,
That fixed it, thanks!! I had the wrong value for C52--close, but no
cigar. Now to do final assembly, work a few contacts, then build the
antenna tuner. Happy, happy!
73,
John K6YLG
On 9/4/2011 4:19 PM, Don Wilhelm wrote:
John,
Sorry that I could not help before the Labor Day
On 9/4/2011 5:22 PM, Johnny Siu wrote:
Hello Jim,
Thanks for your reply.
Yes, I understand the rationale behind. However, I don't understand
why the green ground wire is so specifically linking the AC Earth
Terminal to the case of RF output socket instead of other metal part
of the
On 9/4/2011 5:36 PM, Torsten Clay wrote:
I use a simple (1 transistor) homebrew mic preamp
between the microphone (Heil dynamic headset) and the computer audio in.
Audio out from the computer goes straight to the back of the K3.
I can't think of a reason why that should be required unless the
Hy to all, just done the tx gain calibration for low power and i have a reading
of exactly 5 watts on all bands but 6 meters on which i read 16 watts. What's
wrong about this???
Tnx for help as usual
Pippo
IZ2NYY
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Hello Bob,
I have the internal battery option installed on my K1-4. I searched for
batteries online and at Radio Shack. Elecraft recommends Radio Shack brand
batteries, but warns that they must not be larger than 0.55 (14 mm). I
need 8 NiMh 1.2 volt cells. The RS batteries do not specify the
It sounds like there may be an intermittent short, would be a serious issue,
or the DMM probe was touching the wrong place.
The orientation of the DMM probes should not matter. That check is simply
verifying that the insulators between the metal tab of each rectifier and
the metal heat sink are
One feature the KX3 will have that the K3 does not is dual watch
capability.
73,
Drew
AF2Z
On Sun, 04 Sep 2011 14:24:53 -0700 (PDT), KC6CNN wrote:
The KX3 and K3 have different engineering for the receive.
Can someone explain the difference and which one would be better?
Thanks.
I was just on Elecraft's website looking at the K3 mods and parts order
pages.
Is there a list showing which mods were installed in reference by serial
number or build dates?
The parts order page only indicates that these mods are included on all
new K3's.
I have factory-built serial number
Here I am using the K3 with the KPA500 and P3. Everything works great. But I
have notice that when I am using the 2.7 filter and cw, and the power set
on the K3 is 80 watts, the watt meter on the Kpa shows 60 watts. If use the
500hz filter (on the K3) the kpa watt meter shows 80 watts. Also
drewko wrote:
One feature the KX3 will have that the K3 does not is dual watch
capability.
The KX3 will have dual watch over a limited range, possibly as small
as 10 kHz, though we'll aim for something wider. This would be enough
for CW split operation. Filter bandwidths and certain
If you have trouble using the UPS ordering option, please select a
different ordering method, for now, then let us know you'd like to use
UPS.
For a new order you're entering, you could mention this in the notes
field. For an order you've already placed, send an email to sales at
elecraft
Ron, you have me worried. I had already connected the transformer
secondary leads to the board, but I disconnected them and measured
again. This time, I get an open circuit (as required) no matter which
way I orient the DMM probes. I've checked 4-5 times - same result
either way. Touching
whose output transformer is very small with few windings ...
But that is not a transformer-less SMPS. It does have a transformer.
I'm done with this discussion.
Mark
On Mon, Sep 5, 2011 at 10:05 AM, ron ronc...@verizon.net wrote:
On 09/04/2011 08:07 PM, Mark Bayern wrote:
I am aware of
Certainly, that list exists. On the opening screen (or any others) of
the Elecraft site, click on K3 Mods + App Notes.
If the information listed in the 3rd column is ambiguous, look to the
4th column, You may have to open the application note listed and read
the contents to determine if it
Hello K3 users,
I am using PSK D Mode on my K3 along with the K3's Utilities Terminal
Program and have a few questions:
Threshold does not seem to work in TEXT DEC. I still get many characters
coming thru in the Terminal Program's receive window. I have tried a thr
30 and it doesn't
Michael,
Threshold is not used in the present DSP firmware for PSK D mode.
Squelch is applied to the audio after the PSK detector, so it also has
no effect.
Thanks you for these reminders, I'll look at improving this in the DSP
firmware.
73,
Lyle KK7P
Hello K3 users,
I am using PSK D
You are good to go, Randy, especially since checking the shoulder washers.
That's why the procedure said to check for shorts *before* attaching the
transformer leads. Checking *after* connecting the transformer leads did
provide a circuit path for the DMM that accounts for what you saw.
Why
On 9/5/2011 11:30 AM, Mark Bayern wrote:
whose output transformer is very small with few windings ...
But that is not a transformer-less SMPS. It does have a transformer.
No magic here. Aircraft AC power used to be 400 Hz, and may still be.
It was[is] pretty simple. At 400 Hz, you need a
AC6JA wrote:
I was just on Elecraft's website looking at the K3 mods and parts order
pages.
Is there a list showing which mods were installed in reference by serial
number or build dates?
The parts order page only indicates that these mods are included on all
new K3's.
I have
SOLD. pending receipt of funds.
[K3] FS: Elecraft K3/10-F. One week old. Bought new, factory assembled, on
August 26, 2011. The list of options is below. The K3 is in perfect
condition. Also includes a K3 Nifty Mini-Manual. Asking $2,350, delivered
and insured via USPS Priority Mail, CONUS only.
You may also need K3VFOFILTERKIT K3 VFO Tuning Noise Filter Kit which was
implemented in August 2009...again easy to determine by inspection of the RF
board mentioned below.
73, Bill
Bill W4ZV wrote:
AC6JA wrote:
I was just on Elecraft's website looking at the K3 mods and parts order
Thanks for the help!
Mike AC6JA
In a message dated 9/5/2011 12:51:15 P.M. Pacific Daylight Time,
btipp...@alum.mit.edu writes:
You may also need K3VFOFILTERKIT K3 VFO Tuning Noise Filter Kit which was
implemented in August 2009...again easy to determine by inspection of the
RF
board
I just received my KPA500 (s/n 376) and am very pleased with it. What is
the power limitation, if any, for operating the KPA500 on RTTY? I gather
from the specs that perhaps it is 500 w as long as the duty cycle does not
exceed 10 minutes operate/ 5 minutes standby. Is this correct?
Bob
Yes, 500 watts PEP regardless of mode. This is thus 500W RTTY/FM/CW
(key down :-) etc.
If the amplifier gets too hot, it will let you know in a safe,
non-spectacular way.
73,
Lyle KK7P
I just received my KPA500 (s/n 376) and am very pleased with it. What is
the power limitation, if
On 9/5/2011 2:17 PM, Robert S. McCuskey wrote:
What is
the power limitation, if any, for operating the KPA500 on RTTY?
I run my KPA500 with all the lights lit on RTTY in contests, and with
FSK441, ISCAT, and JT65 on VHF and HF. This gives me 540W out on 6M
and 650-675W on the HF bands. It
If the amplifier gets too hot, it will let you know in a safe,
non-spectacular way.
How boring. 8-)
My KPA500 has been remarkably quiet and has never done anything spectacular.
Except of course, play in a very well-behaved manner with my K3. It slumbers
there until I need it, and then it
Gone are the days when we could judge proper duty cycle and power output by
the red or yellow glow of the final amplifier tube plates.
And of course one always had spares because there was no fancy automatic
monitoring system to intervene if we overdid it.
First technology hid the plates
Now all we need is an add-on RF boardGrin
I assume this will happen as I have tried to get spectacular results but so
far it is flawless despite my failing memory at times...:-)
Of course we may put on a little weight as Elecraft have made operating the
K3-KPA a 'lazy mans' dream.
Gary
On
That removes some of the fun of radio!
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org
On 9/5/2011 2:34 PM, Lyle Johnson wrote:
If the amplifier gets too hot, it will let you know in a safe,
non-spectacular way.
On Mon, Sep 5, 2011 at 5:45 PM, Bruce Beford
bruce.bef...@myfairpoint.netwrote:
If the amplifier gets too hot, it will let you know in a safe,
non-spectacular way.
How boring. 8-)
Indeed boring. MUCH more interesting:
Exploding electrolytic capacitors.
3-1000Z meltdown and implosion.
Boring?..how about an Ole Drake L4B and you are enjoying a nice QSO when
the power supply Carbon Resistor decides it don't want to play the game
anymore...after my Out Of Body Experience I departed the room post
hasteneedless to say my darling wife (VK4JLG) was seen rolling around
the
How about the excitement of drawing an arc off the plate caps of the PA
tubes with a pencil (keep your fingers on the wood). That used to be
part of the excitement of ham radio. Lots of these exciting things have
been lost due to the advent of solid state devices and operating
convenience.
Now that's entertainment.
Also fun is: Applying HV to a kilowatt class amp for 70cm on a cool,
misty, damp, dewy morning after sleeping in a trailer together with all
of the equipment.
The result is one very big and very loud bang.
vy 73 de toby, DD5FZ
I see these receivers and think back
to that time when I wanted one, but I resist the temptation, the new
solid state gear has much better specs and reviews,
Old gear is about ... well ... old gear, and love for it. It has nothing to do
with specs. Restoration is literally an act of love
Thats GREAT! My R4s a,b,c all sound better on SSB then my K2! But I love my K2.
Kurt, W7QHD
From: n...@tx.rr.com
Date: Mon, 5 Sep 2011 19:27:48 -0500
To: elecraft@mailman.qth.net
Subject: [Elecraft] Old Gear was Re: KPA500
I see these receivers and think back
to that time when I
Hello,
I have lost 80m receive on my K2 S/N:7012. I had this problem during the build
but it fixed itself by the time I sorted out some other problems. 80m was
working just fine for 6-7 months. The problem has returned.
Injecting a signal starting at the antenna, I get nothing on either
There is, a portion of the brain, that gets satisfaction by enjoying and
reliving a distant past memory. For my part, it is getting into AM again with
fever. Yes, the newer K3 gear takes the center position in the ham/computer
room. However, down in the winecellar, lurks a Bauer 707 with is
The KPA500 built for my friend (I'm very envious!) is working great!
I'm only able to test it up to about 200w due to dummy load, ATU and
balun limitations, but 2 QSOs tonight reported strong, clean signal!
I have observed something, however. I was using 5w from my K3, through
the KPA, to my
Alan,
First of all, transmission at a fixed frequency of 3712 is indicative of
a problem with the VCO/PLL.
Are the R30 (VCO voltage) values within range on all bands? That is the
starting point.
Next put the internal probe into TP1 and measure the frequency when the
K2 is tuned to 3500, and
Randy,
Under those conditions, your results are to be expected. The KPA500
shut down due to the REFL HI, so the K3 reverted to the non-KPA500
connected and ready state.
73,
Don W3FPR
On 9/5/2011 9:01 PM, Randy Moore wrote:
The KPA500 built for my friend (I'm very envious!) is working great!
About 10 years ago I collected all the parts for a 100 watt tube amp running
a pair of 807's. I was planning to drive it with my K2, which back then ran
10 watts output. Then Elecraft released the KPA100 and I, to, was seduced by
the dark side (literally!)
Still have the parts. Still occasionally
Alan,
Additional information:
The fact that it failed at one point earlier, and fixed itself for a
while strongly suggests a bad solder connection in the PLL/VCO area. It
works one time and not another is usually an intermittent solder
connection problem.
73,
Don W3FPR
On 9/5/2011 8:40 PM,
Yep, some of the old stuff was the subject of dreams of the teenage ham. I
will never give up my Collins 75A4.
Bob
On Mon, Sep 5, 2011 at 6:10 PM, Ron D'Eau Claire r...@cobi.biz wrote:
About 10 years ago I collected all the parts for a 100 watt tube amp
running
a pair of 807's. I was
Ron,
I have a pair of 6146 tubes that suffered the same aspirations and destiny.
I now am working on a WA6EBY amplifier to augment my QRP rigs - it runs
on 24 volts, much safer than fooling with a 750 volt supply., and will
work fine for mobile with a 12 volt input. Besides that, transformers
Great idea. I tested as you suggested and with the jumper in and the back cover
on everything works normally. RF display = 1 bar. Wattmeter = 3 watts into a
dummy load on 12 volts.
I will check all my solder connections on the KXAT board and post again.
Keith, WA5LPW
What is the firmware version of your KRC2? I have this problem with 1.5
when I upgraded the KRC2 to 1.6 the software worked fine.
Rich
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Hi All,
I have tried to download the KPA500 kit assembly manual off the elecraft site
but I am unable to get all of the PDF. The download stops about page 6. Is
there a problem?
Thanks,
Dave K4SV
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On Mon, Sep 5, 2011 at 7:14 PM, Guy Olinger K2AV olin...@bellsouth.netwrote:
Exploding electrolytic capacitors.
3-1000Z meltdown and implosion
Not to mention the parasitic choke gadgets attached to the plate caps
suddenly going off like grenades
Tony KT0NY
Not to mention the time one of the diodes in my Drake L-4B amplifier
power supply decided to let go under load - - sounded like someone had
let loose a 12-gauge under the operating desk. We're talking LOUD!
Or the time one of the (tube) finals in a Drake T-4XC went South - I
was on 20
Just tried both manuals and got all of both.
bill nr4c
-Original Message-
From: Dave [mailto:davek...@yahoo.com]
Sent: Monday, September 05, 2011 9:55 PM
To: Elecraft
Subject: [Elecraft] KPA500 kit manual PDF
Hi All,
I have tried to download the KPA500 kit assembly manual off the
What I find saddest is that I can't fire up my S-40 and swing down into the
broadcast band to catch a Jack Benny program or an next episode of The
Green Hornet...
So I passed it onto a younger fellow who doesn't remember those programs.
73,
Ron AC7AC
-Original Message-
Old gear is
Speaking of the Green Hornet, has anyone watched that movie yet?
I saw it a few weeks ago, its not too shabby at all.
I don't remember that radio series but I do remember listening to The Goon
Show and Flash Gordon on the radio in the kitchen whilst mum and dad were
making dinner.
I am however
I love old gear. I have lots. But it does take some maintenance and time and
tender loving care. Yes there is great audio and lots of knobs to twiddle.
But you wonder, with the complexity of some of the old radios, why the MTBF
isn't 10 seconds. Still when puttering in the shack, I turn on
Hi
Where does one get FW version 1.6?
The one on the EleCraft site is 1.5
TIA de Joe
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Post:
When I attach the aux cable from the KPA500 to K3 I lose audio in one ear and
the speaker is no longer muted. As soon as I remove the aux cable all returns
to normal. Applies to front and rear phone connection. Speaker setting is on
SPKR + PH NO
Have probably changed a setting but can't see
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