I would suggest the TE Systems 1452G.
Same here on the K144XV power out. 6 - 8 watts max which is fine for this
amplifier.
I have found that all the TES amps don't need anywhere near their rated max
input to achieve full output.
73, Charlie k3ICH
- Original Message -
From:
I suppose an old base K3 in an opened box for good discount would do.
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The TE Systems 1452G is a great amp but it takes a large power supply. If
you want to keep it simple and only need around 100 watts the Mirage B-310-G
is a good choice.
Keith, XE3/K5ENS
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Hi Thanks for all the suggestions.
I cannot re-create the effect on any other band but 10M.
I have checked the PSU and its voltage O/P is stable @13.8V ish, (read
on the K3)
Although I shall stick some ferrites on the leads and keep my fingers
crossed, (I am some way from my antenna) I
During a recent firmware update of a new (to me) K3/100, I noticed a brief
message scroll across the screen indicating a PA Error. If I recall correctly
it occurred during the DSP update. I rarely look at the computer or radio when
updating an Elecraft product until it's completed because it
If you want to understand the inter-radio interference issues you face, the
potential for damage they may cause, techniques to measure their magnitude,
and measures you can take to minimize them, I suggest you get a copy of
Managing Interstation Interference by George Cutsogeorge, W2VJN. It is
Thanks to those who wrote me privately as well as those who replied on this
list (KL7UW and K4NH ) regarding the possibility of damage to one radio
from another radio transmitting on a nearby antenna. For the benefit of all
I am pasting below highlights of the useful information I received.
MANY
Connect a grain-of-wheat light bulb across the unused coax and gradually
increase transmit power.
I know this is a rather un-scientific, crude test, but simply put, you're in
big trouble when it glows!
I tried this with a 600 foot Beverage that is, at it's closest point, 50
feet from any
Noticed this morning when turning on the K3 for the first time after
being off all night, that the fans were on and changing speed
rapidly. The fan would run between low and the 3rd speed back
and forth.
Checking the PA temp it was jumping from 25C to 60C back and
forth, thus the reason the
At the risk of blowing our own trumpet here:
http://www.thedxshop.com/linear-amp-uk-linear-amplifiers/gemini-50mhz-70mhz-144mhz-432mhz-solid-state-linear-amplifiers/linear-amp-gemini-2-144mhz-300w-solid-state-linear-amplifier.html
We can supply it to order configured for 110-120V mains input.
Is this a widespread problem? Mine is okay now but I have heard there have
been a few failures.
73,
John N1JM
-
73, John N1JM
K3 #5986
P3 #1752
KPA500 #596
KX3 #926
XG3
XG1
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Quite so.
Forty years ago the FT101 had a front end protection circuit that
included a light bulb. When I was in the Antarctic, location doesn't
really matter, my antennas were reasonably close and when I keyed the
main TX at 1500W the rear of the '101 would flash with the keying.
Never
I have been trying to get my VFO aligned by adjusting C22 based on the methods
recommended by N6KR and as posted in the app notes on the Elecraft website -
http://www.elecraft.com/Apps/notes_on_adjusting_c22.htm.
I can never get it closer than 70 Hz. I am using the 10MHz WWV signal for
Guys,
There is no substitute for a measurement. There is no global answer to
how close is too close or how much power is too much power.
Measurement process is simple:
1) Run one rig at 1 to 5 watts
2) Look at the S-meter on the other.
3) Scale the results upward by adding the number of dB to
Nice. A little pricey but nice.
Keith
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__
Elecraft
John -
I am curious. Where did you hear of such failures, and under what
circumstances? I have not heard of any.
Dave - K9FN
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Help:
If this results in something 80db over S9 then be concerned. Consider
RX protection.
Elecraft should be able give us a figure on the RF protection that the K3
and KX3 have built in.
I'm sure it would be in the design. Wayne? Eric?
Keith, XE3/K5ENS
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What makes you suggest that it is, John?
Phil w7ox
On 4/16/14, 9:59 AM, John_N1JM wrote:
Is this a widespread problem? Mine is okay now but I have heard there have
been a few failures.
73,
John N1JM
-
73, John N1JM
K3 #5986
P3 #1752
KPA500 #596
KX3 #926
XG3
XG1
I want to mount a sealed lead acid battery under the seat of my power
wheelchair. There is limited space which would require the battery be mounted
on it's side. Would this cause any problem/danger if proper insulating
techniques are utilized?
I want to power my 2mtr mobile unit for emcomm use
On 4/16/2014 11:08 AM, Thomas Taylor wrote:
I want to mount a sealed lead acid battery under the seat of my power
wheelchair. There is limited space which would require the battery be mounted
on it's side. Would this cause any problem/danger if proper insulating
techniques are utilized?
A
The problem with most 2 meter brick type amplifiers, is that while they
may have an SSB switch position, it generally only changes the TR
switching method, and doesn't make them linear. The only medium-power 2 M
amp I found that was linear, while we were testing them for QST was the
Tokyo Hy-Power
Hello,
For the sake of future searchers etc, this problem was solved by winding
the 12V PSU lead through a toroid or two, as per one of the suggestions
from the list.
I was surprised as I am well away form my antenna. (Windom)
It seems a few people had this issue on 10M TX and I know
I second Joel's comments - it is a fun amp to build and operate. I put mine
together last year and it has been a nice addition to my station. I drive it
with my K3.
Jim / W6JHB
On Wednesday, Apr 16, 2014, at Wednesday, 11:28 AM, Joel Hallas wrote:
The problem with most 2 meter brick type
Sean,
If the BFO (TP2) is at 4913.05 and the VFO (TP1) is at 14912.97, then
the frequency read at TP1 must come *up* in frequency by 9 to 10 Hz.
In other words, the count *must* rise.
From what you said, the count will rise above 14912,97, and that is
exactly what you want.
The count for the
My KPA500 T/R switch failed after two weeks of operation. Can not pinpoint any
reason why it should fail. It was repaired by Elecraft under warranty in Italy
and has now worked 10 weeks with no problem.
I now always check VSWR on K3 and on KPA with KPA in STBY whenever i operate on
a new band
Strange question, I have not seen or heard of such an issue or on this
reflector from memory.
Curious to hear what the replies are.
Gary
On 17 April 2014 03:43, Phil Wheeler w...@socal.rr.com wrote:
What makes you suggest that it is, John?
Phil w7ox
On 4/16/14, 9:59 AM, John_N1JM wrote:
Don,
Thanks for the quick response.
I gave this a try and went the other direction with the counter. Now after
running PLL, my offset is further off (120Hz).
I am still not able to get the BFO and VFO counters to line up. Turning the
other direction put me closer the 120Hz offset above.
I have
Nice but a bit more than I need
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Elecraft
My KPA500 kit did not work from the get go, this was also due to a
faulty relay. The amp was repaired under warranty in Italy where I had
excellent support and communication but the postage was horrendous,
nearly £200, and it was sent without the transformer!
73
Roger MW0IDX
On 16/04/2014
Sean,
Check the value of C21 - if should be a 33 pF disc ceramic capacitor.
If you put the blue capacitor labeled 331 into the C21 position, the 4
MHz reference frequency will be too low and you will not be able to get
the counters to match.
Your BFO and VFO frequencies are within the
A friend in the Philippines KPA500 failed and he said that he heard others
with early serial numbers had failed.
David Bunte wrote
John -
I am curious. Where did you hear of such failures, and under what
circumstances? I have not heard of any.
Dave - K9FN
I operated as W1AW/5 from here on the Mississippi Gulf Coast last night
on 160 CW from 03-04z, and today on 30 CW from 13-15z and on 17 CW from
17-19z.
It was my first experience running stations split. What a pleasure with
a K3, P3, and KPA500! I logged 555 QSO's in total.
I hope I
Hi All,
The radio arrived, all is working well! The book by KE7X arrived a day
later...
I have the rig on air, and it appears to be working great. Quite a
learning curve... But I am taking it one step at a time, getting each
function working, then rewiring the shack to accommodate.
I
David,
You mentioned AC power - you should power all of your station from the
same AC receptacle (exception is a 230 VAC power for amplifiers). That
assures you that the AC mains ground comes to one point rather than
wandering 'willy-nilly' around the green wire ground connecting the
Hi all,
I have had exactly the same problem on my K3 (4520) It is
intermittent and ahs been that way fo a couple of years! Not causing any
operational issues except for 160M AM net when it causes the K3 to drop
back to 5 watts use it to drive a linear with the power out set to
Sounds good, David. I've done substantial rework,
too -- but mostly due to the KPA500 (needed RG-213
to replace RG-8X runs in the shack -- and added
switches so I can use 3/4 antennas with K3/500 or
other rigs, like K1, KX1, K2/100 and KX3).
I'm never likely to post pictures of my shack: It
I tried to bust through the pileup to you on 20m last night.
No such luck. Not with my SPT-500 Penetrator antenna for 10m.
Some pileup you created...
Slava B
W2RMS
On Apr 16, 2014, at 7:59 PM, Bill Breeden breede...@cableone.net wrote:
I operated as W1AW/5 from here on the Mississippi Gulf
Hi Don,
Thank you for that info, I have powered everything, (except for the
amp), off a single largish UPS, that way the grounds are the same, and I
get a few minutes to kill power of the commercial power dies...
I will be adding a new ground rod to the house ground system, and
bonding that to
David,
If you add ground rods, know that all ground rods should be tied back to
the Utility ground rod by a large conductor (#6 wire is the minimum
size). That is not only a requirement of NEC safety rules, but also a
safety consideration for your station. All driven ground rods must be
Hi Don,
That is the plan... I just want to add one more, as I have one, the
weather is not bad, I need the exercise, and a bit better ground can't
hurt.
Thanks for the heads up on making sure it is tied to teh house ground.
Our ground is getting close to 20 years old, so I am pretty sure it
On 4/16/2014 5:24 PM, Don Wilhelm wrote:
You mentioned AC power - you should power all of your station from the
same AC receptacle
Yes.
(exception is a 230 VAC power for amplifiers).
The green wire for the 240V outlet should either be the same wire as for
the 120V outlet, OR the green
Here is the SSB net report for April 6, 2014. We had 32 participants.
Station NameQTH Rig S/N
W0CZKen ND K3 457
KM4IK Ian GA K3 281
Right on Doug. I love my K-Line. Best rig I've ever had, and like you, until
the K4, I won't have another. Unless I add a KX3, or K1. Nothing like having
a rig you can tailor to your personal operating preferences. Thank you
Elecraft!! Now, I, for sure, would buy that new K3 transmit signal
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