Same here. I have two of these supplies, and have yet to hear a
peep of RF noise from them.
73
Stewart G3RXQ
On Mon, 7 Jul 2008 21:50:08 -0400, Bruce McLaughlin wrote:
I am having very good performance from the SEC 1223 which is the
same supply
I use with the K2/100. If it does generate any
Thomas Kuehl wrote:
small size as well. Switching supplies have come a long way relative to
the RF hash generation issue and I am considering going that route. I sure
don't want to degrade the K3'3 outstanding performance with a noisy
supply, so I am still cautious.
I don't like
I still have problems with my K3.The sensitivity is very low and I
can´t do the low power tx calibration.
I loaded the latest
firmware and checked all the settings again and
again.
Gary Surrency, from the elecraft support, suggested to do a few
measurements.These are the results.A friend
Pardon me if someone has already pointed this out (I have not followed the
entire thread)- my past experience with linear supplies reveals an all too
often failure mode of either shorted pass transistors or blown control chips
(LM-723). In either case the output voltage from the supply can
Same here - nice quiet PSU. I would buy one again without any hesitation.
Simon Brown, HB9DRV
--
From: G4ILO [EMAIL PROTECTED]
I don't like switchers. I have a Diamond GSV3000 25A linear supply.
___
Read Twice, assemble once.
My K3 is getting closer to ship time. I plan on stretching out the assembly
time over two days. I believe anomolies experienced by some are from small
assembly errors like washers and the like, or touching an RF sensitive
component during assembly.
Based on my own personal experience, I would recommend a linear supply. I
use the Astron RS-35A. Yes, it is as big as the K3, but it is rock solid,
well-filtered, and RFI-free, and has over-voltage and over-current
protection. In addition, the Astron has heavy-duty output terminals that
will
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Erik N Basilier
My K3 ... interesting to do an A/B comparison to see how the receiver
sounds with/without the narrow crystal filter for a given bandwidth.
...
What has been observed by the group?
I have 2 SEC1223's and no hash. I also have an Astron RS35 and RS50 linear
supplies. Sometimes the magnetic hum from them drives me crazy. The little
cork pads Astron puts in them to alleviate this
does not help much. I keep them under the closed console on the floor.
Darwin, Keith wrote:
each step. When I step to 500 Hz and the narrow roofing filter kicks
in, I can hear a distinct change, more than just the DSP narrowing I'd
heard while stepping from 1000 Hz to 550 Hz. The effect is very
noticeable.
- Keith N1AS -
- K3 711 -
Keith,
Can you describe this
Thanks Don,
I checked the diodes and D12 and D14 in the switching circuit tested bad
along with D10 in the 12V line. However when I took them out they all
tested OK. I replaced them with new and now D12 and D14 tst OK in circuit
but D10 still shows bad but is OK once taken out of circuit.
Mike Penkas wrote:
I have 2 SEC1223's and no hash. I also have an Astron RS35 and RS50
linear supplies. Sometimes the magnetic hum from them drives me crazy.
The little cork pads Astron puts in them to alleviate this
does not help much. I keep them under the closed console on the floor.
Thomas Kuehl wrote:
Hi,
I am back on the Elecraft list after being gone for quite a while. I have
a K3/100 coming in the next month or 2, and now I am thinking about how it
is best to power it.
Thanks, Thomas - AC7A
I bought the Alinco DM-330MW to power my K3. It's pretty small
Keith Darwin wrote:
each step. When I step to 500 Hz and the narrow roofing filter kicks
in, I can hear a distinct change, more than just the DSP narrowing
I'd
heard while stepping from 1000 Hz to 550 Hz. The effect is very
noticeable.
Jim replied:
Keith, Can you describe this change
I believe that all new SEC1223's have the mods fitted.
73
Stewart G3RXQ
On Tue, 08 Jul 2008 14:40:27 +0200, Jan Erik Holm wrote:
Mike Penkas wrote:
I have 2 SEC1223's and no hash. I also have an Astron RS35 and
RS50
linear supplies. Sometimes the magnetic hum from them drives
me crazy.
The
Darwin, Keith wrote:
I've not attempted such a complex test as you described (which I snipped
out). I have the 500 Hz filter in my rig. As I narrow the DSP from 2
KHz to 550 Hz, I can hear a predictable narrowing of the passband with
each step. When I step to 500 Hz and the narrow
- Original Message -
From: Jan Erik Holm [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Sent: Tuesday, July 08, 2008 8:31 AM
Subject: Re: [Elecraft] Hearing the effect of narrower roofing filter
Darwin, Keith wrote:
each step. When I step to 500 Hz and the narrow roofing filter
Subject: K3 and Transverters
Hi I wonder if the powers that be have thought about doing a few elecraft
transverters in K3 Black to match K3's? Also how easy/hard would it be to
change the 50 MHz transverter over to 70 MHz? the 4 meter band is quite
popular over here in Europe, there
I have a GSV3000 as well and can confirm the lack of rfi. In my opinion switch
mode
supplies have no place anywhere near the ham shack - its bad enough the
neighbours
having them all over the place but they don't know or care - we should know
better.
As an aside if anyone has any doubts
Wayne did say last year there would be black enclosures, but not
specifically that they would do black panel XVs.
The size is different too. - I bought an XV144
There was something on here some months ago about converting XV50 to
XV70 and its in the mail archives and attached what I saved
Same here. I have two of these supplies, and have yet to hear a
peep of RF noise from them. 73 Stewart G3RXQ
I am having very good performance from the SEC 1223 which is the
same supply I use with the K2/100. If it does generate any noise I have yet
to hear it. Bruce-W8FU
I'm using a
The early Samlex switching power supplies were on the noisy side but they have
corrected that problem years ago. I personally use the Samlex SEC 1235M
switching supply with my K3 and certainly do not get any noise from it.
73 from Fern VE7GZ with K3 #412
- Original Message -
Fine observations when you change the filter setting knob, but what makes you
think you are hearing the effect of the roofing filter and not the dsp filter?
David
G3UNA
From: hank k8dd [EMAIL PROTECTED]
Date: 2008/07/08 Tue PM 02:29:08 BST
To: Jan Erik Holm [EMAIL PROTECTED]
CC:
I need to pay for my K3. I have for sale a K2/100:
S/N 6194
KSB2
KPA100
KNB2
FDIMP
K8ZOA Z1 IF buffer amp and Softrock IF receiver for K2.
(These are assembled, the buffer amp is installed, but I have not yet tested
them.
No sound card that works well enough yet)
I would like $1150
Just completed LP-PAN Software Defined IQ Panadapter for the K-3. All initial
checks are okay. Sep-up and interface is too much for me without a better
sound board. Asking $175 shipped in the lower 48, or consider optional 8-pole
filters for the K-3 in trade. Contact off list please. Bob,
Not sure, David, if your Q was to me or to Hank. I can only answer for
me.
When I adjust the filter width knob, I'm most definitely hearing the
combined effect of the DSP bandwidth reduction and the change in roofing
filters. But, since I can change DSP without changing the roofing
filter (by
Joe Subich, W4TV-3 wrote:
This is not the case based on careful measurements. The problem
is 'skirt sharpening' when multiple filters are cascaded. Where
a single filter might have a 6dB bandwidth of 225 Hz (200 Hz
roofing fitter), when combined with the 200 Hz DSP filter the
A couple of related points, which may not be new news to anyone:
You can set the K3's filter bandwidth configuration to cause the roofing
filter to switch at points other than the bandwidth printed on the filter.
Maybe you would like your (nominally) 500 Hz filter to switch in at 450 or
550 Hz.
This is in a completely different area but trust me on this one... See
if you can find R66 on t he bottom of the RF board toward the right side
of the unit when you're looking at the unit from the front. Its just
above Q8 and Q9. Measure the resistance of R66 and post that here.
On Tue,
K6KR wrote:
I notice a definite qualitative change as the narrower filters switch in.
It
sounds quieter, and it seems like the volume is being turned down. I think
I'm responding to the reduced low and high frequency components that are
supposed to be cut off. The DSP-related changes seem more
Hello Group,
I saw some posts in the past about converting a XV50 into 70mhz operation. I
would wonder whether Elecraft will consider preparing an official conversion
kit for such purpose. With minimal amount of RD expenses, Elecraft will then
in fact further expand their product line.
For
I agree with this assessment and when I get my rig back plan on upping
my 250 filter to kick in at 350. But I had 4dB of gain on the 250 and
it still seemed like things got a lot quieter when switching to the 250.
I'd have to measure and see if I had the actual same level there (and I
can do that
This is in a completely different area but trust me on this one... See
if you can find R66 on t he bottom of the RF board toward the right side
of the unit when you're looking at the unit from the front. Its just
above Q8 and Q9. Measure the resistance of R66 and post that here.
Hi Brett,
The reason I'm particularly interested is because I fancy doing diversity
reception and de-select my roofing filters in the main rx so there is no
phase shifting relative to the second rx without filters.
Have you de-selected the roofing filters to do a comparison with and
without?
David
But if you leave the setting at its nominal, can you hear the difference as
that bandwidth is selected? I'm not sure I understand the advantage you are
gaining by bringing the crystal filter in later; I'll do if there's
something to be gained, it sounds an interesting approach.
David
G3UNA
Ok then so you don't have that problem... Do you have an oscilloscope
handy? Or can you take a measurement with your RF probe on pin 6 of the
reference board? Take a measurement on both pin 6 and pin 8 of the
connector where the reference board meets up with the RF board if you can...
Nope, I have not. My operating (near zero right now due to life
getting in the way) is 99.9% CW, old school, with manual keys. I'm not
pushing the envelop so I'm not trying new novel things. These days, I
pretty much just use my rig rather than playing testing with it.
- Keith N1AS -
- K3
I'm not completely sure what to do with this capability, other than perhaps
have the switchover occur at a bandwidth that more closely matches the
filter you actually have. What I've done is tell the K3 that my 250 Hz
filter is really 300 Hz (it's really probably more like 370 Hz).
I also have
Howard,
I don´t have one here, but I could ask a friend, but that will take some
time...if I measure, should I turn on the rig or even transmitt(low power)?
--
View this message in context:
http://www.nabble.com/Low-sensitivity-and-low-power-calibration-failure-tp18335793p18345022.html
Sent
John King wrote:
I'm sorry to hear about your failure at FD. I have heard no other
reports of FD failures, and to my knowledge the VP6DX crew had
no failures during their operation earlier this year. It may be
of small comfort to you, but I regard your failure as an anomaly
- stuff happens.
Did you get a reduction in RX sensitivity? What happens if you try to do a
tune when set to 5.0 watts?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Philip Leonard WVØT
Sent: Tuesday, July 08, 2008 11:11 AM
To: Elecraft Reflector
Subject: Re:
Hi all . . .
Tom is being released from the hospital this afternoon (Tuesday).
Thanks be to God who walks us through dark valleys.
And thanks to all of you for your prayers and concern.
73,
Kent Trimble, K9ZTV
President
Mid-MO Amateur Radio Club
Jefferson City, MO
Please excuse the bandwidth just wanted to test
73 Peter.
--
View this message in context: http://n2.nabble.com/Nabble-2-tp395610p395610.html
Sent from the Elecraft mailing list archive at Nabble.com.
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K3/10 Kit, KAT3, KBPF3, KFL3A-1.0K, KFL3A-2.8K, KFL3A-250, KFL3A-400, KUSB
Ordered: 2/19/08
Katiegram: 7/2/08
Arrived via UPS: 7/8/08
Inventory tonight but assembly will be delayed family events. Expect power
on in about a week.
pumped!
jim ab3cv
The LP-PAN panadapter listed by k9foh has been spoken for. Thanks, Bob
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That is great news, I'm very glad he has done well and wish him a most
speedy recovery.
73 de M0XDF
--
There is no limit to what you can accomplish if you don't care who
gets the credit. --Ronald Reagan
On 8 Jul 2008, at 19:25, K9ZTV wrote:
Hi all . . .
Tom is being released from the
If you like to operate portable, maybe you would be interested in this
club.
http://www.wa3wsj.org/GORC.html
72,
Ed, WA3WSJ
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So, it appears that my other option is a Vista PC - and I have
the same questions - what ham SW runs or doesn't run under Vista:
logging programs, K2 rig control programs, SDR programs, EZNEC,
transmission line programs, etc.?
Thanks.
Bob W1SRB
Bob,
I'd avoid Vista even if
What can be done with the AGC is simply marvelous. I have put the THR and the
SLP on the PF buttons for now.
BUT...
I can adjust these settings easily now for the band condition and the signal I
am listening to. However, I don't necessarily have a good feel at all for what
I have actually
The high prices of the roofing filters for the K3 and optional filters for
other rigs reminds me of a little history.
I want Elecraft to make a good profit so they'll remain in business
to support me, if needed, down the road.
You can't remain in business without making a good profit.
I have read the Elecraft write-up and have questions. I am on 14.070
and get some data, but not human readable. Using sound card in by
Compaq Deskpro computer.
1. Do I use a stereo or mono plug for line out? Using stereo now.
2. Do I use BPSK31 or QPSK31? Using BPSK31 now.
3. Assume the K3
I tried to interface the K3 with my 425 amp as suggested by TenTec. That
did not work.
Has someone done this and if so what did you do.
Now I have the K3 key out going to 425 PTT in and the amp if following
the keying.
In the Ten Tec method, you connect the key to to amp and have it send a
M0CDL wrote:
Hi I wonder if the powers that be have thought about doing a few elecraft
transverters in K3 Black to match K3's?
When I ordered my K3 a year ago I sent an email to Elecraft regarding this
same issue. I suggested that they consider having black housings available
for the KXV
I have a new k2 that is all but useless as a CW rig because of audio pops when
transition from tx to rx. Pop is also present when power on or pwr off, vol
setting no difference in level of pop. Worse with NR off.
There is mention of this problem in years past, but nothing recent, and no good
Joe,
What data mode are you in - it must be DATA A (press the AFX/DATA MD
button and turn VFOB to change.
Are you in USB with both Digipan and the K3 data mode - press AFX/DATA
MD button and hold ALT to toggle between USB to LSB if you need to
change the K3.
Yes, BPSK should work, and the
This discussion gives me the opportunity to correct an opinion that I
earlier posted on this list. Some long time ago I said I didn't much
like the Watson W25-XM switched supply because of RF noises which
always contrive to arrive on frequency at the worst possible
moment. I advised someone
Trevor Smithers wrote:
supplies have no place anywhere near the ham shack - its bad enough the neighbours
having them all over the place but they don't know or care - we should know better.
But we should also know about conversion efficiencies, power factors and
power line harmonics!
As
I also have an Astron RS35 and RS50 linear
supplies. Sometimes the magnetic hum from them drives me crazy. The little
cork pads Astron puts in them to alleviate this
does not help much. I keep them under the closed console on the floor.
Mike WA8EBM
- Original Message
I was wondering if we could get CW speed selections of 31.415926535 or
27.18281828 words per minute, not exactly you understand. I find that ten Pi
or ten e fits my mood and I am a happier when I am irrational.
Ten times the square root of 3 is a nice speed and kind of looks like George
Hello all,
I am using the MFJ-4125 25A switcher with my K3. I have no RF hash or
birdies from the power supply at all. I find it unbelievable that popular
and supposedly quality power supplies like the Astron would leave exposed
transistor cases at elevated voltage above ground. The MFJ fan,
Here's a plug for the MFJ-4225MV which I'll be using with my K3 any day
now ...
It should go well because it's small and light (I guess most switchers
can make that claim though). I have not noticed any RF noise when using
it with my IC-706 or alongside my now departed FT-1000.
It has a
To the Group:
Having ordered a K3 at Dayton, I've been following the recent discussion on
DSP vs. Roofing Filter for bandpass width determination with great interest.
In that regard, I have a quick question - what is the width increment
available by adjusting the DSP. Based on some of the
Yes its 50Hz.
On Tue, 2008-07-08 at 20:55 -0400, Doug Joyce wrote:
To the Group:
Having ordered a K3 at Dayton, I've been following the recent discussion on
DSP vs. Roofing Filter for bandpass width determination with great interest.
In that regard, I have a quick question - what is the
Wayne,
I would like to be able to erase entries from PF1 and PF2 instead of having to
overwrite these memories. Please consider putting this on the list. Thanks
Roy Morris W4WFB
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You must
Inventory done with all sub assys present.
Almost missed the mixer since it was so tiny.
Didn't count all the screws in the parts bags.
Life is good.
K2 is working the QRP foxhunt now.
73
jim ab3cv
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Hi Elecrafters,
Something strange (?) is happening with my T1 and a Yaesu FT817 using the
cable. I tune a band, work it, then go to another one.
If I return to the previous band, the yellow light is flashing instead of the
green one, as it is supposed to do. Sometime, the green light flashes
I am a cw guy and use the standard 2.7 kHz 5-pole filter and the 400 Hz
8-pole filter. I find them to be an excellent combination.
73, Norm - W1MO
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Congrats! Have fun putting her together!
On Tue, 2008-07-08 at 21:28 -0400, Jim Miller wrote:
Inventory done with all sub assys present.
Almost missed the mixer since it was so tiny.
Didn't count all the screws in the parts bags.
Life is good.
K2 is working the QRP foxhunt now.
When I try to scan between two frequencies on 6m I get the message Scanning
not allowed on this band.
I'm using the procedure described on page 37 of my manual. Am I missing
something? Why is scanning not allowed on six meters?
Thanks.
___
Elecraft
From what I understand its an FCC/legal type of thing...
On Tue, 2008-07-08 at 22:21 -0500, Dave Quick - KØEKL wrote:
When I try to scan between two frequencies on 6m I get the message Scanning
not allowed on this band.
I'm using the procedure described on page 37 of my manual. Am I
On Tue, 8 Jul 2008 17:13:49 -0400, Jack Colson wrote:
I tried to interface the K3 with my 425 amp as suggested by TenTec. That
did not work.
Has someone done this and if so what did you do.
I did this with other rigs, but have not needed to do it with the K3.
Now I have the K3 key out going
It's sooo nice to write this quick note for the benefit of those who are
still in the queue:
K3/100 kit ordered 2/17/08
Katiegram received 6/29/08
Received package 7/8/08 (4 months, 3 weeks!)
(6 kHz AM filter and KRX3 subreceiver backordered)
My K3 is s/n 1206 (easy to remember if you're into
I find the fan noise on my MFJ-4125 unacceptable.
If I ever use it again it will have to be put behind the desk.
73,
Tony W7GO
ab2tc wrote:
Hello all,
I am using the MFJ-4125 25A switcher with my K3. I have no RF hash or
birdies from the power supply at all. I find it unbelievable that
On Tue, 2008-07-08 at 17:02, ab2tc wrote:
Hello all,
I am using the MFJ-4125 25A switcher with my K3. I have no RF hash or
birdies from the power supply at all. I find it unbelievable that popular
and supposedly quality power supplies like the Astron would leave exposed
transistor cases at
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