Re: [Elecraft] New Eham.net K3 review by QRPNEW

[Samir Popaja]

I made some A/B testing in CQ160 last weekend, between K2 and TS-850S. They 
hear pretty good the same but it's much easier to copy week signals with K2 if 
you have S9+ signal close to you. 

I suppose that K3 is even better...

Samir, 7S7V



Message: 29
Date: Mon, 26 Jan 2009 11:55:52 -0500
From: Randy Downs 
Subject: Re: [Elecraft] New Eham.net K3 review by QRPNEW
To: "Kenneth E. Harker" ,
Elecraft@mailman.qth.net
Message-ID:
<97f678d20901260855x6760c92cle536d9ef305e9...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Actually when 10 meters opened up last Saturday I fired up my 850 for a
while on SSB. I went back to the K3. I could get much closer to signals with
the K3 without desense. I have been very happy with the K3 using the N8LP
Panadaptor. I've been able to get very close to 40 over signals with no
problems. My other rigs won't. I use the K3 rx not  PwrSdr. I drive the K3
from the PC though. I do wish the K3 was like my Ft2000 was as far as size,
etc. BUT I would not go back. On 160 phone I see 40 over signals all of the
time with no problems at all. I run phone  most of the time. I'm very happy
with the K3.
Randy
K8RDD

On Mon, Jan 26, 2009 at 11:40 AM, Kenneth E. Harker  wrote:

> On Mon, Jan 26, 2009 at 08:00:41AM -0700, Jim  Garland wrote:
> >
> >
> > >
> > > I see that a new review of the K3 has appeared on Eham.net which will
> no
> > > doubt raise the hackles of the paid-up members of the Elecraft fan
> club,
> > > and
> > > cause nods of agreement from many others.
> > >
> > > http://www.eham.net/reviews/detail/6673
> > >
> > > -
> > > Julian, G4ILO. K2 #392  K3 #222.
> >
> > I read the review, and while "QRPNEW" took a few unwarranted pot shots at
> > the K3, I also thought he made some interesting and valid points. The
> gist
> > of his comments is that the K3 can't quite decide whether it wants to be
> a
> > small portable transceiver, or a full-sized full-featured base station
> > transceiver, and in trying to be both it falls short in several respects.
>
> Well said.
>
> Another thing to consider is that a lot of the review is related to the
> use of the radio on SSB rather than CW.  Elecraft has never had the same
> overall high-end achievement for phone operation as it has had for CW
> operation.  A $700 used Kenwood TS-850 stands up pretty well against an
> Elecraft K3 in a phone contest.
>
> --
> Kenneth E. Harker WM5R
> kenhar...@kenharker.com
> http://www.kenharker.com/
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[Elecraft] HEIL BM-10 or HEIL Traveler for K2

[Samir Popaja]

Hello,

I'm in process to buy light headset for K2. I'm primary contester. Which
microphone element I should choose for K2?

Any comments about quality of sound and comfort (24h or 48h contest),
BM-10 vs Traveler?

Thank You
7S7V (SM7VZX)
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[Elecraft] W2 and VHF coupler

[Samir Popaja]

Hello Elecraft,

Is any plans for this kind of coupler (DCV/U-200 144-450 MHz, .1- 200W) but
in 1KW range?

Thanks
Samir, 7S7V
 

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Re: [Elecraft] Elecraft Amps

[Samir Popaja]

I think that is market for VHF amplifiers too...Look at this site,
http://www.i0jxx.com/index.php?cPath=18_34, it's some kind of modular
approach but without good manuals...

Samir, 7S7V
 

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[Elecraft] External 2 meter amplifier alternatives

[Samir Popaja]

Hello,

Look at this, http://www.eham.net/reviews/detail/6437:
http://www.rlham.com/cgi-bin/shop/modellookup.dbw?MODEL=1410G
maybe little over your $400 but much better quality then others

maybe best quality you will get from TOKYO HY-POWER, but you need to pay
little more...

Best Regards
Samir, 7S7V (SM7VZX)
www.qsl.net/7s7v




Message: 19
Date: Sat, 20 Feb 2010 20:35:58 -0800
From: Lew Phelps K6LMP 
Subject: [Elecraft] External 2 meter amplifier alternatives
To: elecraft@mailman.qth.net
Message-ID: <30bab18d-add6-4287-9b15-05cc6aa36...@me.com>
Content-Type: text/plain; charset=us-ascii

I have on order -- and hope to receive in about 3 weeks -- Elecraft's K144XV
2 meter internal transverter module for my K3. I'm beginning to look at
available alternatives for an external 2 meter amplifier, and would
appreciate any experience anyone on the list has with any of the following:

1. Communications Concepts 875A (10 watts in, nominal 75 watts out, $120 for
a complete kit, $160 assembled)
2. Mirage B1018G (10 watts in, nominal 160 watts out, $350 new from some
dealers)
3. Maha MH-A103 (5 watts in, nominal 50 watts out, several used units
currently available on eBay under $100)
4. KLM PA 2-70BL (4 watts in, nominal 70 watts out, one used currently
available on eBay, BIN of $100)

Any other amps I should be considering?

"Must have" criteria: will operate on 13.8VDC power, requires no more than
10 watts input to achieve maximum rated output, interface easily with
K144XV.

Nice to have criteria:  compact, quiet, less than $400 street price.

Max power output isn't all that critical to me; this will be used for VHF
contesting, not EME, so I don't need or want a 1KW or 1.5KW tube-based
amplifier. Based on my experience in VHF/UHF contesting, I think that either
75 or 150 watts out would be a big improvement over 10 watts, but that there
wouldn't be all that much difference in results between 75 and 150 watts.
Yes, I'd love to have 500 or so watts, but the price tag is too high for my
budget at the moment, given what I need to add to my K3.   

Based on specs and price (that is, most watts output for the buck) I'm
leaning toward the CC 875A kit, but I can't find any reviews that discuss
its performance and reliability. It's uses a Motorola MRF247 MOSFET, and is
based on a circuit design in Motorola's Application Note AN791.  CC has
added some features to the basic design published by Motorola, but the basic
amp is what's described in AN791. I like the fact that it's compact (6 x 3 x
4.25"), and that it draws only 9 amps at maximum output.  The cost per watt
of output is $1.60 for the kit. The lack of a pre-amp doesn't seem too
significant to me, given that the K144XV specs show -144 dB sensitivity (14
dB improvement over the main rig's  -130 dB specs). Is anyone familiar with
this product?

The Mirage B1018G has a lot more output when driven by 10 watts in, and it
includes a receive pre-amp with jumper-selectable gain ranging from 2.5 to
14 dB -- duplicative of the receive amplification in the K144XV --   but
it's also more expensive, and a lot bigger and heavier (12 x 3 x 5.5, 5
lbs.) The cost per watt of output is $2.19 given the best dealer price I can
find (which isnb't Mirage itself). Given that Mirage is owned by MFJ, I'm
also a bit leery of construction quality and reliability. At full output
this unit requires 30 amps, which is a minus factor for me. The amps/watt is
about 1.5 times the power supply requirement of the 875A.

The used units mentioned have their own attractions, but both are long out
of production, and thus support would be zilch, so they are lower on my
list, subject to input from this group.

Comments and "user reports" welcome.


Lew Phelps K6LMP
Pasadena, CA DM04wd
Elecraft K3-10 (160-6 meters, soon to be 160-2 meters, all modes)
Yaesu FT-7800 (2m and 70 cm, 50 watts FM only)


 

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[Elecraft] Elecraft] two 2m-Transverters for diversity reception on 2m

[Samir Popaja]

One can use JAVORNIK, transverter with 2 RX...

http://lea.hamradio.si/~s53ww/xvrt/xvrt.htm

http://lea.hamradio.si/~s53rm/JAVORNIK%20144.htm

73' 7S7V


Message: 3
Date: Mon, 13 Sep 2010 09:09:01 -0800
From: "Edward R. Cole" 
Subject: [Elecraft]  two 2m-Transverters for diversity reception on 2m
To: Elecraft@mailman.qth.net
Message-ID: <201009131709.o8dh91x2064...@ingra.acsalaska.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed

John is correct.  Diversity receivers require a common LO.  This is 
provided in the K3 with the aux receiver, but adding VHF transverters 
to both receivers will not add properly if they are running separate
LO's.

I am in the process of setting up a 2m dual-polarity receiver using 
two transverters but run with one LO driving both units.  I 
discovered that DEMI is developing a dual-Rx transverter (two Rx 
antenna ports and IF outputs) that implements this in a single unit - 
I'm on the short-list to get one when available).

Just connecting two separate 2m transverters will not ensure proper 
phase relationship between the two IF outputs so one could end up 
with a situation where the two signals null each other.  This is 
analogous to combining two transmit amplifiers.  If the outputs are 
out of phase energy from one will to into the other with disastrous
effect.

73, Ed - KL7UW

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[Elecraft] SV: Re: K2 Transmitted Phase Noise? (Torsten Clay)

[Samir Popaja]

Look here:

http://www.cliftonlaboratories.com/imd_measurements.htm scroll down to K2/100

or

looke here:

http://www.df9ic.de/tech/trxtest/trxtest.html

"The Elecraft K2 also has a low IF design using conventional VCOs which should 
result in a good LO noise supression but does not do so well. We had two radios 
on the bench, one from 1999 (DJ5IR) and one from 2004 (DJ0QZ). This last one 
was tested on 14 MHz and showed better results than the older one on 28 MHz. 
You may compare the ARRL test results of the LO noise that Elecraft publishes 
on their own website and which is closely within our blocking test result (our 
measured -95 dB RX blocking in 20 kHz offset is equivalent to -129 dBc/Hz LO 
noise). The high level of TX noise shows that there seem to be design flaws 
choosing too low signal levels internally. The AGC threshold is ridiculously 
high (subjective impression). I also do not understand why it uses low quality 
ladder crystal filters instead of a filter from monolithic duals like other 
radios does. Overall it was the worst HF radio in the test "

I have also ts-850s and K2/100, hi

Best regards
Samir


>>Kenneth Silverman wrote:
>> 
>> Do K2/100's have a known transmitted phase noise issue?   I looked at the
>> reflector archives, and there was some comment by K6SE (SK) in 2005 that
>> seemed to indicate there was, but the scenario seemed rather specific.
>> 
>
>I used a pair of K2/100's as a SO2R pair for 5 years. I never felt that TX
>>phase noise was a limitation for me. I could listen quite well on other
>bands except near the harmonics of the transmitter. This is at either 100W
>or 1500W level. I have ICE bandpass filters and stubs and most of my
>antennas have reasonable isolation.

>Tor
>N4OGW
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[Elecraft] K2 and SSB monitoring

[Samir Popaja]

Hello,

I use my K2/100 and I'm very pleased, almost good as my TS-850S.

What I miss compared to TS-850S, is SSB monitoring. Is any chance to
implement such kind of function in K2?
It will be nice to have possibility to hear your own voice...

I'm also using this kind interface
(http://www.qsl.net/k0bx/soundcard.htm) between computer with TS-850S
for VK, voice keyer. How to connect it to K2?

Thanks

Best Regards
Samir, SM7VZX (7S7V)
www.qsl.net/7s7v
www.sk7mw.se
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[Elecraft] ts-850s and transverter (XV144)

[Samir Popaja]

Hello,

Is any chance to connect (interface) ts-850s with transverter for 2m (Elecraft 
XV144) without special mods?

Can someone write some easy "how to".

Thank You

Best Regards
Samir

Samir Popaja, 7S7V /SMVZX
http://ww.qsl.net/7s7v
Duhöksgatan 4B
SE-21558 Malmö
Sweden
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Re: [Elecraft] ts-850s and transverter (XV144)

[Samir Popaja]

According to ts-850s manual, minimum power to set ts-850s is 20w.

Also, according to manual, one need to move coaxial cable from CN26 to CN25. 
Now one can use IF OUT to drive transverter. So far so good.

Antenna contact on ts-850s uses for receiving, IF OUT uses for driving 
transverter.

QUESTIONS:
-IF OUT -> How much power we have here? 1W, 1mW or...nothing in manual.
-PTT on transverter, what to use from ts-850s to PTT the transverter, how?

Samir, SM7VZX


--

Message: 8
Date: Mon, 12 Feb 2007 08:14:55 -0800
From: "Jim Brown" <[EMAIL PROTECTED]>
Subject: Re: [Elecraft] ts-850s and transverter (XV144)
To: "elecraft@mailman.qth.net" 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"

On Mon, 12 Feb 2007 16:50:59 +0100, Samir Popaja wrote:

>Is any chance to connect (interface) ts-850s with transverter for 
2m (Elecraft XV144) without special mods?

>Can someone write some easy "how to".

I did it with my XV220 several years ago, with no complications and 
it worked fine. I don't recall details of my hookup, but I think I 
simply reduced output power of the 850 to a very low level and drove 
the XV220 directly from the main output. I also added an outboard 
amp, and was running 100w. That was in Chicago, and I've since moved 
across the continent to California, and am not back on the air on 
VHF yet. 

The XV144 and XV220 are essentially the same unit, but with the RF 
design optimized for different bands. 

73,

Jim Brown K9YC
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[Elecraft] XV144 and linear amplifier

[Samir Popaja]

Hello,

I'm using XV144 with Kenwood TS-850S(will be replaced with K3). If I want to
use it with linear amplifier, do I really need Sequence Controller (a´la
http://www.ssb.de/amateur/pdf/dcw2400e.pdf)? I do NOT use preamplifier, no
need for it.

 
73' Samir
 
Samir Popaja, 7S7V (SM7VZX, T94BO)
http://www.qsl.net/7s7v/
Duvhöksgatan 4B
SE-215 58 Malmö
Sweden

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[Elecraft] K3/XV144 vs. KX3/XV144

[Samir Popaja]

Hello,

Is any difference between those two combo in prestanda for contesting?Will use 
only for contesting in Europe...

Skickat från min iPhone
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[Elecraft] KX3, IF for XV144 (vhf contesting) (XV144 update?)

[Samir Popaja]

Hello,

 

I'm wondering how good the KX3 is for IF with XV144 in VHF contesting.

 

I have use  K3 previously and now )Iwould like to have something little
smaller but with same good performance.

 

Little worried after I read this review:

http://ve3vn.blogspot.se/2015/02/kx3-review-by-qrp-dxer-and-contester.html

 

Is any chance for Elecraft to make (KIT UPDATE) for XV144 to use IF on
14MHz, the most transceivers has much better characteristic on 14MHz then on
28MHz. One can choose if they want to make XV144 with 28 or 14MHz IF,
depending on use (CW, SSB, FM).

 

73' Samir, sm7vzx 

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[Elecraft] XV-144 -> redesign = XV-144-2

[Samir Popaja]

Hello Elecraft,

 

Is any plans to redesign the XV-144? Kuhne, HA1YA, SSB Electronic has made
new transverters.The XV-144 feels very outdated design.

 

73' Samir, sm7vzx

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[Elecraft] K3 + XV144, how the PTT/ sequencer works

[Samir Popaja]

Hello,

 

I'm getting to use K3/ XV144 with tube amplifier on 2m. I'm wondering how
the PTT/ sequencer in this kombo K3 + XV144 works?

I don't use extern LNA (no need).

 

When I push the microphone or beginning to send CW has the coaxial relays in
the amplifier already switched?

 

Thanks

 

Samir, sm7vzx

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[Elecraft] XV144, protection against high SWR?

[Samir Popaja]

Hello,

I just wondering if the XV144 has some kind of protection against high SWR?

I have burned C44 in XV144, twice in very short period. First time when I
using
XV144 to tune input circuit of my amplifier, and second time I forgot to
switch
input relays when testing and the XV144 was without load for less the 1s, it
was enough to burn C44...

http://www.sk7mw.se/samir/xv144/xv144_burned_c44.jpg

Thank you

Samir, sm7vzx
 

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[Elecraft] Sideband noise of K3 transceiver ...

[Samir Popaja]

http://www.ok2kkw.com/next/staronove_vyzvy.htm

 

http://translate.google.se/translate?sl=auto

&tl=en&js=n&prev=_t&hl=sv&ie=UTF-8&eotf=1&u=http%3A%2F%2Fwww.ok2kkw.com%2Fne
xt%2Fstaronove_vyzvy.htm

 

73' & HNY

sm7vzx

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Re: [Elecraft] 2-meter solid-state linear amplifiers with K3

[Samir Popaja]

Hello Phil,

 

If the price isn't issue I would go for THP (Tokyo Hy Power) or BEKO.

 

I have THP HL-160V25A, no problem driving it to full power with K3/XV144
combo. Getting clear signal without problem. The same with HLV-1500 from
BEKO. Just see the EHAM.NET reviews, for those company, the reviews are
actually true, hi.

 

73' Samir, 7s7v

 

Message: 2

Date: Sun, 20 Jan 2013 09:53:34 -0800

From: Phil Hystad <  phys...@mac.com>

To: "  elecraft@mailman.qth.net
List" <  Elecraft@mailman.qth.net>

Subject: [Elecraft] 2-meter solid-state linear amplifiers with K3

   2-meteroption

Message-ID: < 
18c4603e-bdae-4d77-90e6-a086427b8...@mac.com>

Content-Type: text/plain; charset=us-ascii

 

Does anyone have the K3 2-meter option and use a solid-state linear
amplifier?

 

If so, which one.  Also, maybe some information on the best to worst in
available 2-meter amplifiers as I have never looked into these before.

 

And, a friend suggested building my own 2-meter solid-state amplifier.  Has
anyone done this and maybe I can hear a little about that too.

 

Thanks for any comments.

 

73, phil, K7PEH

 

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Re: [Elecraft] [KPA500] - 144MHz Version?

[Samir Popaja]

Me too.

73' Samir, SM7VZX (7s7v)

-Original Message-

Yes,

I would.  Wouldn't require all the space either and would have a little room
to spare.  Auto tuner for 2m?  :-)

73,
Bill
K9YEQ

-Original Message-

I was recently studying the schematics of the KPA500 and looked at the
specification of the VRF2933 devices which are used in the RF deck of the
amplifier. I noted that the devices are rated to 150MHz which made  me think
a 144Mhz version of the KPA500 would be a nice addition for a K3 equipped
with a K144XV 2m option (or indeed any 144MHz transceiver). Nearly all the
existing KPA500 metalwork, PSU and front panel PCB (with different firmware
and no band buttons) could be carried over with a different RF deck (perhaps
using the same VRF2933 devices and heatsink). A 2m version could potentially
be lower cost as the switchable complex LPF arrangement of the HF/6M KPA500
would not be required. The RF deck aside, the R&D costs would be low, using
much of the already proven KPA500 hardware. The 500W output is ideal for
here in the UK where the power limit is 400W. Even a 432Mhz version could be
created although the VRF2933 devices would have to be replaced with
something else - I suspect the demand for this 70cm version would be far
lower than that for 144MHz and would not be cost effective for Elecraft.

I currently use a Henry Tempo 2002 using two Eimac 8874 on 144MHz. I think
that a 144MHz KPA500 would be cheaper than obtaining two replacement tubes
for my existing amp! I would certainly be very interested in the purchase of
a 144MHz KPA500 (KPAV500 ?) - anyone else?


73

Allan
GM4ZUK




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[Elecraft] Seinnheiser PC230 + K3; settings

[Samir Popaja]

Hello,

http://www.sennheiser.com/sennheiser/home_en.nsf/root/private_headsets_pc_mu
sic_504119

Is any who has experience with this headset for K3, Seinnheiser PC 230
headset? 

It's very light headset and it has very nice sound quality (both headphones
and microphone) when
Has been used in video conferencing. I would like to try it with K3? Any
suggestions for MIC settings?

I ordered K3 on Saturday, expecting to arrive in beginning of next week.

HEIL PRO SET was very good on my IC-756PRO3 with HC4 element but I was
disappointed with the headphones.
HEIL need to much gain for decent  audio.

73' Samir, sm7vzx
www.qsl.net/7s7v


 

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Re: [Elecraft] KX3 vs. K3 (IF for XV144)

[Samir Popaja]

The output isn't problem and I only need to cover 144-145MHz, I'm only
interested in contesting on 2m, CW/SSB.

I'm actually interested in sensitivity and strong signal rejection.

73' Samir, sm7vzx


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[Elecraft] Power Suppy for K2

[Samir Popaja]

Hello,

Any recomendation for PS for K2?

Which to choose, switching supply or not switching?

Whats the difference between switching supplies and not switching supplies? 
Pros and cons...

I'm wondering that ELECRAFT hasn't devoloped PS to match design for  K2 or 
K2/100?

Thanks
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[Elecraft] XV144 vs.DB6NT TR 144 H

[Samir Popaja]

Hello,
 
Have somebody made some tests with XV144
vs. more known transverters; Kuhne TR144H, Javornik (S53WW) and LT2S?
 
It will be use with TS-850S.
 
Thanks
SM7VZX
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[Elecraft] XV144 state of the art or ... Test of the Large Signal Behaviour of some 144 MHz Radios?

[Samir Popaja]

Hello,

Taken from, the http://www.df9ic.de/tech/trxtest/trxtest.html 

"The Elecraft K2 also has a low IF design using conventional VCOs which should 
result in a good LO noise supression but does not. You may compare the ARRL 
test results of the LO noise that Elecraft publishes on their own website and 
which is closely within our blocking test result (our measured -95 dB RX 
blocking in 20 kHz offset is equivalent to -129 dBc/Hz LO noise). The high 
level of TX noise shows that there seem to be design flaws choosing too low 
signal levels internally. The AGC threshold is ridiculously high (subjective 
impression). I also do not understand why it uses low quality ladder crystal 
filters instead of a filter from monolithic duals like any other radio does. 
Overall it was the worst HF radio in the test (OK, a 144 MHz IC910H is still 
worse...)."

Is the K2 + XV144 really bad combo or the others transverters are much better?

73' SM7VZX
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SV: [Elecraft] XV144 state of the art or ... Test of the Large SignalBehaviour of some 144 MHz Radios?

[Samir Popaja]

Why I put this on the reflector?

I'm in processing to buy transverter, which I will use "to begin" with ts-850s, 
then maybe with K2, which I think is "perfect" portable combo for VHF 
contesting.

After reading this test I was little bit scared and want the Elecraft community 
(owners of XV144) to make little positive comments on XV144.

Thank You
73' SM7VZX

-Ursprungligt meddelande-
Från: Don Wilhelm [mailto:[EMAIL PROTECTED]
Skickat: den 11 december 2006 14:34
Till: Samir Popaja; elecraft@mailman.qth.net
Ämne: RE: [Elecraft] XV144 state of the art or ... Test of the Large
SignalBehaviour of some 144 MHz Radios?


If I read it correctly, this 'test report' and comments were for the K2
operated without the transverter, but all the data presented was for testing
with a transverter.

I am not certain of this individual's intent, but it would appear to me that
he was determined to present the K2 in a bad light.

For one, I do not understand why he chose only to operate the K2 with the
preamp ON when used with a transverter - the transverter should provide all
the front-end gain needed, and turning the pre-amp on should accomplish
nothing for weak signal detection, but certainly does reduce the IF receiver
dynamic range (and thus effects his 'blocking test').  In addition, he used
2 borrowed K2s, and we have no information about the health of these K2s,
they may not have been operating properly.  Remember that the K2 is not an
'off the shelf' transceiver, and setup and alignment is done by the
individual builder rather than on a factory assembly line.  Many K2s are
operating at top performance, but many are not.  Alignment and calibration
are not difficult, but we have no assurance that it was done correctly for
the K2s used.

All in all, this report does not square with others which do document the
test setup and conditions used along with unbiased results.  I refer you to
the ARRL lab test which do document their entire setup and test methodology.
Since the results in this 'report' are quite different than from other
reports, I believe he either had malfunctioning K2s to work with or intended
to skew the report.

73,
Don W3FPR

> -Original Message-
> Hello,
>
> Taken from, the http://www.df9ic.de/tech/trxtest/trxtest.html
>
> "The Elecraft K2 also has a low IF design using conventional VCOs
> which should result in a good LO noise supression but does not.
> You may compare the ARRL test results of the LO noise that
> Elecraft publishes on their own website and which is closely
> within our blocking test result (our measured -95 dB RX blocking
> in 20 kHz offset is equivalent to -129 dBc/Hz LO noise). The high
> level of TX noise shows that there seem to be design flaws
> choosing too low signal levels internally. The AGC threshold is
> ridiculously high (subjective impression). I also do not
> understand why it uses low quality ladder crystal filters instead
> of a filter from monolithic duals like any other radio does.
> Overall it was the worst HF radio in the test (OK, a 144 MHz
> IC910H is still worse...)."
>
> Is the K2 + XV144 really bad combo or the others transverters are
> much better?
>
> 73' SM7VZX
>
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[Elecraft] XV144 Performance

[Samir Popaja]

I think the best way should be to test the same K2 transceiver with available 
transverters on market and maybe take IC746PRO for reference (most contest crew 
use ic746pro for main rig on 2M) :
 
K2 + XV144 (ELECRAFT, http://www.elecraft.com/XV/XV.htm)
K2 + LT2S (SSB, http://www.ssbusa.com/transys.html)
K2 + TR 144 H (KUHNE, 
http://www.kuhne-electronic.de/english/transverter/144mhz.htm)
K2 + Javornik (S53WW, http://lea.hamradio.si/~s53ww/xvrt/xvrt.htm)
K2 + (DEMI, DEM 144-28, http://www.downeastmicrowave.com/PDF/14428.PDF)
 
We all know that combo good HF RIG + XVRT outperform today available amateur 
VHF transceivers on market.
 
73' SM7VZX

Message: 4
Date: Tue, 12 Dec 2006 20:49:21 +1000
From: "Glenn McNeil" <[EMAIL PROTECTED]>
Subject: [Elecraft] XV144 Performance
To: 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain;   charset="us-ascii"


Hello Group,

After reading some of the recent posts re the XV144 and the K2 as the IF for
a 144 Mhz System, I have for the last two years used exactly such a
setup...with exceptional results, and after several A/B Tests on the same
antenna system, I am satisfied that the K2 and the XV144 combination cannot
be beaten with existing off the shelf "commercial" equipment.

A big claim ? I don't think so, and after trying a host of radios from Yaesu
and Icom, the Elecraft System has proven to be superior from my point of
view...which is based on completed QSO's in the logbook and several wins in
the Ross Hull VHF/UHF Contest that is held in these parts ( VK ).

I have read the post by the German group re the K2 and the XV144...and I
agree with DonI can't quite see what they were trying to prove, or
disprove.

My most recent tests involved an IC910 and the Elecraft setup...the Elecraft
gear is simply superior in performance. Your options for VHF/UHF gear
are...TS2000, IC910 or the FT897...in these parts anyway. After having tried
the FT897 and the IC910 ( three of them ) I would never bother with them
again. The FT897 was simply terrible.

So that's my opinion...until something comes along...and it will...that is
better, you cannot beat the XV144 for $$$ value and performance.

>From a one eyed, Elecraft nut.

73

Glenn
VK4TZL
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Re: [Elecraft] amplifier keying

[Samir Popaja]

If I want to drive "RM HLA 300V Professional HF Linear Amplifier",
http://www.rmitaly.com/scheda.asp?IDGr=1&cat=19&tipo=188
do I need something more to basic K2?

73' SM7VZX


-

Message: 7
Date: Tue, 02 Jan 2007 06:13:54 -0600
From: Tom Hammond <[EMAIL PROTECTED]>
Subject: Re: [Elecraft] amplifier keying
To: "William Langford" <[EMAIL PROTECTED]>,
elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"; format=flowed

William (Bill?):

Contrary to what some have replied, you DO NOT have to have the 
KPA100 in order to drive an external amp to anywhere from 150W-600W 
output (depending upon your amp). The K2 will drive most amps pretty 
well even with the 15W available from the 'basic' rig. Of course, if 
you do want full output from your amp, them the KPA100 will be the 
better choice of driver. In which case you WILL NOT require the 
device suggested below! The AMPKEYKIT (below) is only required if you 
have the bare bones K2... the KPA100 and the K60XV (60M converter) 
option both include MOSFET drivers capable of keying external amps.

73,

Tom  N0SS

At 05:09 AM 1/2/2007, Bill Langford wrote:
>If I build the K2, how could I key my Ameritron ALS-600 amp?
>Is anyone out there driving an amp with their K2?

Yes, many are...

See:  http://www.n0ss/net/k2_t-r_rly_drvr.pdf

The link includes complete documentation for the addition of this K2 
(Basic) External T-R Relay Key Kit.

This link is also available on the Elecraft web site at:

   http://www.elecraft.com/order_form_parts.htm#

drop down to K2 PARTS AND MOD KITS, and then you'll find it at the 
bottom of that specific listing.

73,

Tom HammondN0SS



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[Elecraft] XV144 -> any plans for small 2m linear amplifier cca 100W

[Samir Popaja]

Hello,

I have the XV144 transverter, which I will use with tube amplifiers (GS31 or 
GS35), so I need more than 25W, which XV144 barely deliver (being really HOT 
already with 10-15W). Does ELECRAFT have any plans for some small “really” 
linear amplifier??? We have K2 and K2/100, why not XV144 and XV144-100???

I know that are many brick amps (MIRAGE) out there …

73' Samir, SM7VZX

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[Elecraft] K3 with XV144

[Samir Popaja]

Will be new Elecraft K3 usable for VHF Contesting? Any tests?

73' Samir, SM7VZX

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Re: [Elecraft] K3 2 tone 3rd order dynamic range at 2 KHz

[Samir Popaja]

Is any chance for testing K3 with XV144 and how's that compare with DF9IC 
measurements of other VHF transceivers and different combos of XCVR and 
Transverters? Maybe we have winning combo for VHF here?
 
73' SM7VZX



Message: 28
Date: Thu, 27 Dec 2007 22:40:46 +0100
From: Toby Deinhardt <[EMAIL PROTECTED]>
Subject: Re: [Elecraft] K3 2 tone 3rd order dynamic range at 2 KHz
tone spacing
To: Dave G4AON <[EMAIL PROTECTED]>
Cc: elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Dave,

My K3 shows an IMDR3 of between 110dB and 105dB with slight variations
from the upper to lower side. This with the 400Hz roofing filter and
400Hz DSP filter at spacings of 100, 50, 20, 15, 10, 5 and 2kHz on the
20m band. Last week our quick and dirty first look also gave us numbers
in the same ballpark: IMDR3 of 106db at 20 and 5kHz and 104db at a
spacing of 2kHz.

We did find some spurs, last week, which were coming from one of the HP
signal generators, which slightly confused us at first. The spurs were
very far down, but they were there.

vy 73 de toby
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[Elecraft] VB: Reason to NOT buy a K3?

[Samir Popaja]

Hello,
 
How's about performance on 10M band? I'm thinking to use K3 like IF to my 
XV-144. Now I'm using K2.
 
K3 wasn't on market when this list created, 
http://lea.hamradio.si/~s53ww/xvrt/xvrt.htm, Table 4: IP3 values of different 
HF RIG's on 14 MHz and 28 MHz...
 
Thank You
Samir, SM7VZX
 
Message: 16
Date: Sun, 26 Dec 2010 15:11:34 -0500
From: Don Wilhelm 
Subject: Re: [Elecraft] Reason to NOT buy a K3?
To: garyk...@wi.rr.com
Cc: 'Elecraft' 
Message-ID: <4d17a176.7010...@embarqmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

  Gary,

Since DXing on 80 meters often is similar to DXing on 160 meters, the 
"testimonial" from W8JI right after he received his K3 may give you some 
insight - Tom said something similar to: he wished that he would be the 
only operator with a K3! Yes that was a "backwards" compliment to the 
K3, but if you are familiar with Tom's posts on the Topband reflector 
and others, you will know that he is very critical about any radio - not 
so with the K3.

73,
Don W3FPR


On 12/26/2010 2:10 PM, Gary K9GS wrote:
> Hello all and Happy Holidays!
>
> I've been reading the K3 reflector for the past couple of weeks. I'm in
> the market for a new radio and have my choices narrowed down to a couple
> models to replace my TS-850S which has served me very well.
>
> First my operating interests:
>
> I primarily spend my time contesting, DX contests in particular, and
> most of my time on 80 and 40M. 99% of the time I operate CW. So, in
> particular, low band CW performance is important to me. In between
> contests I spend my time DXing, again primarily on the low bands. Some
> occasional VHF operating on 6 and 2M.
>
> I'd also like to point out that I do interface my radios to a dedicated
> computer using Win XP pro and use N1MM for contesting and Logger 32 for
> general operating. Both of these applications are very well supported
> and the K3 is well represented among users.
>
> I've narrowed my choices down to two radios, the FTDX5000 and the K3.
> There are several things keeping me from falling in love with the FTDX5000:
>
> 1) The CW break-in performance is broken in the FTDX5K above ~30 wpm,
> resulting in chopped characters, and from what I'm told, really bad
> sounding on the air.
> 2) The APF filter is also not working correctly.
> 3) The contour control does not function on CW, I believe only on SSB.
>
> Of course, these limitations COULD be fixed by Yaesu in future revisions
> but I'm apprehensive that Yaesu is going to fix anything. They
> certainly don't participate in the FTDX5000 user forums although
> supposedly they do read the posts. Sort of the "we know what we're
> doing, there's no problem" attitude with JA radio manufacturers. After
> all, how many FT-1000XX radios were built with the key click problem? I
> don't think Yaesu ever admitted there was an issue and the fix was
> relatively simple to implement in production.
>
> At $5K plus one would hope these problems are addressed but one never
> knows. Certainly Elecraft is much more responsive and is actively
> involved in post sale issues and solutions.
>
> I've never been a fan of ICOM HF radios although the IC-7800 gets good
> reviews but at $10K per radio??? I've also used Ten-Tec before and
> never been a big fan plus the Orion II suffers from a poor performing
> 2nd receiver and I know of several locals that have had there Orions
> back for service/updates several times. So what else is there and am I
> missing anything else?
>
> Which brings me to the K3. This radio seems, to me, to be exactly what
> I'm looking for. I really can't think of anything holding me back.
>
> I'm looking at the 100W model with the following accessories:
>
> a) KAT3
> b) KXV3A
> c) 2.8K 8 pole SSB filter
> d) 400 hz 8 pole filter
> e) 250 hz 8 pole filter
>
> Future options would be the KRX sub receiver, K144XV-K 2M Module (I do
> some VHF operating but presently have a rig for 2M SSB anyway), I'm
> not currently using any receive antennas on 80/40M. I'd like an opinion
> on this but I don't think I see the advantage to buying the sub receiver
> UNTIL I have receive antennas available for diversity reception? What
> am I missing here?
>
> I don't operate any of the digital modes but I would like to do so. Is
> the 2.8K filter adequate for digital modes or do I want something different?
>
> I also like the portability of the K3 as I am planning on some future
> DX-pedition use. I can't see lugging a 43 pound FTDX5000 through
> airport security either.
>
> Sorry for the long post but I wanted to have a sanity check with some
> experienced K3 users that know the K3 and have similar interests and
> requirements. I'm on vacation this week and one thing I do plan on
> doing is dropping by a local in or DX club and using his K3 for a couple
> of hours.
>
> Your thoughts and comments are appreciated.
>



--

Samir, 7S7V
www.qsl.net/7s7v

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[Elecraft] Priset for Elecraft K3S-100

[Samir Popaja]

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[Elecraft] Price for Elecraft K3S-100

[Samir Popaja]

Hello,

 

Is anyone who remember the last price for Elecraft K3S-100 (new) with
standard 2.7kHz filter?

 

What price would ine expect for this one in good used condition these days?

 

Anyone remember the last serial numbers of K3S sold by Elecraft?

 

Thanks 

 

73' Samir, sm7vzx

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[Elecraft] KX144 (kind of)

[Samir Popaja]

Hello Elecraft friends,

I wonder if Elecraft will ever make a 2m radio like old Kenwood TR-751 A,
YAESU FT-290R or something like that (format) ... of course with K3S
contest similar performance and at least 25W out?

What do you think, is there interest from Elecraft or the market for that?

73 'Samir, sm7vzx
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[Elecraft] KX3 + KX 2M vs IC-705 on 144mhz

[Samir Popaja]

Hello,

I wonder if anyone has compared KX3 with KX 2M against IC-705 or IC-9700 on
2m?
Receiver characteristic and TX TX noise?

Thanks in advance...

Samir, sm7vzx
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Re: [Elecraft] Reason to NOT buy a K3?

[Samir Popaja, E77V, 7S7V]

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