Elecraft

K2 with 144Mhz transverter

Classic

List

Threaded

15 messages Options

S55M

K2 with 144Mhz transverter

Please some comments:

I had information that DK8SG measured some HF transcievers K2 included with 2m transverter and got this data for K2:

NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.

For those who r not familiar with this data I can only say that are bad....but how???
I suppose the transverter was always the same.

Why? How?

TNX for answers...

S55M-Adi
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

S55M

Re: K2 with 144Mhz transverter

And the link to measurments page:

http://hft.fh-pforzheim.de/trxtest/Messergebnis/TRX_Messung_2_2005.pdf

I dont know what does it mean K2 mit VV (K2 with? maybe Vor Verstarker)
Still noone want to comment........?????

K2 is top preformance rtx and should show better numbers....
Or not?

S55M-Adi

----- Original Message -----
From: "S55M" <[hidden email]>
To: "Elecraft" <[hidden email]>
Sent: Thursday, March 10, 2005 2:04 AM
Subject: [Elecraft] K2 with 144Mhz transverter

Please some comments:

I had information that DK8SG measured some HF transcievers K2 included
with 2m transverter and got this data for K2:

NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.

For those who r not familiar with this data I can only say that are
bad....but how???
I suppose the transverter was always the same.

Why? How?

TNX for answers...

S55M-Adi
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

S55M

Re: K2 with 144Mhz transverter

And from picture i suppose that the measurments were made on K2+XV144....
http://hft.fh-pforzheim.de/trxtest/Photos_DK9IP/CIMG5396.JPG
Any comments from the designers house?

----- Original Message -----
From: "S55M" <[hidden email]>
To: "Elecraft" <[hidden email]>
Sent: Thursday, March 10, 2005 12:12 PM
Subject: Re: [Elecraft] K2 with 144Mhz transverter

> And the link to measurments page:
>
> http://hft.fh-pforzheim.de/trxtest/Messergebnis/TRX_Messung_2_2005.pdf
>
> I dont know what does it mean K2 mit VV (K2 with? maybe Vor Verstarker)
> Still noone want to comment........?????
>
> K2 is top preformance rtx and should show better numbers....
> Or not?
>
>
> S55M-Adi
>
> ----- Original Message -----
> From: "S55M" <[hidden email]>
> To: "Elecraft" <[hidden email]>
> Sent: Thursday, March 10, 2005 2:04 AM
> Subject: [Elecraft] K2 with 144Mhz transverter
>
>
> Please some comments:
>
> I had information that DK8SG measured some HF transcievers K2 included
> with 2m transverter and got this data for K2:
>
> NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.
>
> For those who r not familiar with this data I can only say that are
> bad....but how???
> I suppose the transverter was always the same.
>
> Why? How?
>
> TNX for answers...
>
> S55M-Adi
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

dj7mgq

Re: K2 with 144Mhz transverter

Hi Adi,

When I take a look at
http://hft.fh-pforzheim.de/trxtest/Messergebnis/TRX_Messung_2_2005.xls
and not the PDF, I wonder which transverter was used with the K2. The
pictures http://hft.fh-pforzheim.de/trxtest/Photos_DK9IP/page_01.htm
would seem to indicate that the transverter was from Elecraft.

Very interesting results indeed.

vy 73 de toby

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

S55M

Re: K2 with 144Mhz transverter

In reply to this post by S55M

OK...now I'm getting really angry HI HI :))...
First the transmitter (easy one)

I made a measurment with my HP8590A of the transmitted signal from K2 to
transwerter (signal after the first buffer).
When i moove 100 KHz away from carier there is -73dBc of signal remaining.
After a little bit of conversation with local gurus probably this not to
good number (compared dBc's of other same 1.st class rtx's are -90
to -100dBc)

Is it possible to improve K2's local osc noise and purity???

Thank's
Adi

"mit VV" is a german term for "with preamplifier". "ohne VV" is "without
preamplifier".

For the bad data you have to know, every K2 is very special. Do you know,
how well the allignement of the basic K2 was done? And the transverter: was
it well build and is everything ok?

73 de DH8DAP, Frank from Schwelm nr Cologne, JO31PG
(working on K2 #4770)

And the link to measurments page:

http://hft.fh-pforzheim.de/trxtest/Messergebnis/TRX_Messung_2_2005.pdf

I dont know what does it mean K2 mit VV (K2 with? maybe Vor Verstarker)
Still noone want to comment........?????

K2 is top preformance rtx and should show better numbers....
Or not?

S55M-Adi

----- Original Message -----
From: "S55M" <[hidden email]>
To: "Elecraft" <[hidden email]>
Sent: Thursday, March 10, 2005 2:04 AM
Subject: [Elecraft] K2 with 144Mhz transverter

Please some comments:

I had information that DK8SG measured some HF transcievers K2 included
with 2m transverter and got this data for K2:

NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.

For those who r not familiar with this data I can only say that are
bad....but how???
I suppose the transverter was always the same.

Why? How?

TNX for answers...

S55M-Adi

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Eric Swartz - WA6HHQ

Re: K2 with 144Mhz transverter

Administrator

Hi Adi,

There must be something wrong with your K2 or measurement set up. As can be seen
from the phase noise plot on our web page (under radio comparisons) the K2 TX
signal is better than -130 dBc when you get 10-20 kHz away from the carrier.
Also, what b/w and span were you using on your 8590 analyzer?

On the receive side the XV and K2 pair are among the best out there. I do not
know what was different about his set up.

73, Eric

S55M wrote:

> OK...now I'm getting really angry HI HI :))...
> First the transmitter (easy one)
>
> I made a measurment with my HP8590A of the transmitted signal from K2 to
> transwerter (signal after the first buffer).
> When i moove 100 KHz away from carier there is -73dBc of signal remaining.
> After a little bit of conversation with local gurus probably this not to
> good number (compared dBc's of other same 1.st class rtx's are -90
> to -100dBc)
>

S55M

Re: K2 with 144Mhz transverter

Hy Eric!

Thanks for Your answer.
The measurment setup is :
VBW 100Hz
RBW 10kHz
Span 500KHz

Any ideas what went wrong????

Adi
----- Original Message -----
From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]>
To: "S55M" <[hidden email]>
Cc: "Elecraft" <[hidden email]>
Sent: Thursday, March 10, 2005 6:53 PM
Subject: Re: [Elecraft] K2 with 144Mhz transverter

> Hi Adi,
>
> There must be something wrong with your K2 or measurement set up. As can
be seen
> from the phase noise plot on our web page (under radio comparisons) the K2
TX
> signal is better than -130 dBc when you get 10-20 kHz away from the
carrier.
> Also, what b/w and span were you using on your 8590 analyzer?
>
> On the receive side the XV and K2 pair are among the best out there. I do
not

> know what was different about his set up.
>
> 73, Eric
>
>
> S55M wrote:
> > OK...now I'm getting really angry HI HI :))...
> > First the transmitter (easy one)
> >
> > I made a measurment with my HP8590A of the transmitted signal from K2 to
> > transwerter (signal after the first buffer).
> > When i moove 100 KHz away from carier there is -73dBc of signal

remaining.
> > After a little bit of conversation with local gurus probably this not to
> > good number (compared dBc's of other same 1.st class rtx's are -90
> > to -100dBc)
> >

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

S55M

Re: K2 with 144Mhz transverter

Hello again....and again :))

Nw i tried to reduce RBW to 1KHz but not so much difference.....
Where to check first?

I have some home made switching circuit to switch between transverter and
normal K2 work.
Should be this the reason for non working?
I will try to put it out and to measure the signal directly from pins on K2
main PCB...
All kinds of sugestions are wellcome.
The BATT PREFF setting in TX mode doesn't changed anything...

Adi
----- Original Message -----
From: "S55M" <[hidden email]>
To: "Elecraft" <[hidden email]>
Sent: Thursday, March 10, 2005 8:20 PM
Subject: Re: [Elecraft] K2 with 144Mhz transverter

>
>
> Hy Eric!
>
> Thanks for Your answer.
> The measurment setup is :
> VBW 100Hz
> RBW 10kHz
> Span 500KHz
>
> Any ideas what went wrong????
>
>
> Adi
> ----- Original Message -----
> From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]>
> To: "S55M" <[hidden email]>
> Cc: "Elecraft" <[hidden email]>
> Sent: Thursday, March 10, 2005 6:53 PM
> Subject: Re: [Elecraft] K2 with 144Mhz transverter
>
>
> > Hi Adi,
> >
> > There must be something wrong with your K2 or measurement set up. As can
> be seen
> > from the phase noise plot on our web page (under radio comparisons) the

K2
> TX
> > signal is better than -130 dBc when you get 10-20 kHz away from the
> carrier.
> > Also, what b/w and span were you using on your 8590 analyzer?
> >
> > On the receive side the XV and K2 pair are among the best out there. I
do

> not
> > know what was different about his set up.
> >
> > 73, Eric
> >
> >
> > S55M wrote:
> > > OK...now I'm getting really angry HI HI :))...
> > > First the transmitter (easy one)
> > >
> > > I made a measurment with my HP8590A of the transmitted signal from K2

to
> > > transwerter (signal after the first buffer).
> > > When i moove 100 KHz away from carier there is -73dBc of signal
> remaining.
> > > After a little bit of conversation with local gurus probably this not
to

> > > good number (compared dBc's of other same 1.st class rtx's are -90
> > > to -100dBc)
> > >
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

Brendan Minish-2

Re: K2 with 144Mhz transverter

S55M said:
> Hello again....and again :))
>
> Nw i tried to reduce RBW to 1KHz but not so much difference.....
> Where to check first?
>
S55M said:
> Hello again....and again :))
>
> Nw i tried to reduce RBW to 1KHz but not so much difference.....
> Where to check first?
>
The specs on the HP8590 would imply that you are looking at test
instrument limitations rather than the rig it's self

The hp 8590 spec for noise sidebands is < -65 dBc at 30 Khz offset
Max dynamic range for onscreen viewing 70dB, for signal to distortion max
dynamic range is 70dB

73
Brendan EI6IZ

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

S55M

Re: K2 with 144Mhz transverter

Yes Brendan!

I figured it out very well too.
Now i tried another aproach with 144Mhz RX and injecting at the same time
the K2+transverter (over attenuator) on main qrg (observing the noise on
RX)and signal generator 5, 10 and 20KHz away from central frequency.
I think the dinamic range of RX (at this time ft897D) will be good enough to
see if anything is wrong....
On 14Mhz (IF qrg for my trv) with K2 on TX 14.265 (over 35dB ATT)
means -36dBm signal at ant port i can not hear any noise increment 10Khz
away ,barely heard at 6KHz.....
It seams that i pushed HP over limits HI HI.

At the end Brendan,Eric and others thanks for Your time and explanation....

But still have to check the RX chain....and still dont know how DK8SG and
DF9IC got that bad results with XV144....:(

Adi

----- Original Message -----
From: "Brendan Minish" <[hidden email]>
To: "S55M" <[hidden email]>
Cc: "Elecraft" <[hidden email]>
Sent: Thursday, March 10, 2005 10:51 PM
Subject: Re: [Elecraft] K2 with 144Mhz transverter

S55M said:
> Hello again....and again :))
>
> Nw i tried to reduce RBW to 1KHz but not so much difference.....
> Where to check first?
>
S55M said:
> Hello again....and again :))
>
> Nw i tried to reduce RBW to 1KHz but not so much difference.....
> Where to check first?
>
The specs on the HP8590 would imply that you are looking at test
instrument limitations rather than the rig it's self

The hp 8590 spec for noise sidebands is < -65 dBc at 30 Khz offset
Max dynamic range for onscreen viewing 70dB, for signal to distortion max
dynamic range is 70dB

73
Brendan EI6IZ

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Fraser Robertson

RE: K2 with 144Mhz transverter - phase noise

In reply to this post by S55M

Adi, I've compared two latest spec. K2/100's with a FT1KMP, TS870, and a
home brew VFO/Xtal mixer rig, and the close in TX phase noise (unkeyed
carrier) of the K2's is worse than the other rigs. I think the figure you
quote is probably typical. If there is a way to improve on this I'd love to
know as in many respects the K2 is a great rig and I'd like to use it for
QRO contesting. (I have not used a transverter).

73 Fraser G4BJM

>
>NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.
>
>For those who r not familiar with this data I can only say that are
>bad....but how???
>I suppose the transverter was always the same.
>
>Why? How?
>
>TNX for answers...
>
>S55M-Adi

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

ok1rr

Re: K2 with 144Mhz transverter - phase noise

it would be quite interesting to know where is the culprit - if K2 or
the transverter

73 Martin OK1RR

Fraser Robertson napsal(a):

> Adi, I've compared two latest spec. K2/100's with a FT1KMP, TS870, and a
> home brew VFO/Xtal mixer rig, and the close in TX phase noise (unkeyed
> carrier) of the K2's is worse than the other rigs. I think the figure
> you quote is probably typical. If there is a way to improve on this I'd
> love to know as in many respects the K2 is a great rig and I'd like to
> use it for QRO contesting. (I have not used a transverter).
>
> 73 Fraser G4BJM
>
>>
>> NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.
>>
>> For those who r not familiar with this data I can only say that are
>> bad....but how???
>> I suppose the transverter was always the same.
>>
>> Why? How?
>>
>> TNX for answers...
>>
>> S55M-Adi
>
>
> _________________________________________________________________
> Express yourself instantly with MSN Messenger! Download today - it's
> FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

S55M

Re: K2 with 144Mhz transverter - phase noise

Martin ,for the bad results of K2+Transverter probably both of them
contributed.
My first try with transverter+K2 was in Marconi CW contest (November
2004).Before that i used FT1KMP and Javornik transverter.
Other stations told me, that i was very noisy over a whole 2m band while on
TX.
At that time i was using for TX IF input ,output from TX of 10W K2 reduced
with power button and adequate attenuator to bring it down to 1mW needed for
transverter input.It was a horrible choice i realised.....
Now i am using the 1mW signal directly after first bufer (like XV144 does)
and still got to test the noise with carrier on and with unmodulated
signal......hope it will be ok...
Maybe for someone is strange that a bit of noise is heard, but in S5 and
generaly in central Europe the density of crowded band is unbelivable
(several Kw stations on hilltops almost "touching" ich other with antennas
HI HI) so the clear TX and bullet-proof RX is extremly important for
contesting.
All ideas and tips and tricks are wellcome :)

s55m-Adi

----- Original Message -----
From: "Martin Kratoska" <[hidden email]>
To: "Fraser Robertson" <[hidden email]>
Cc: <[hidden email]>; <[hidden email]>
Sent: Friday, March 11, 2005 1:55 AM
Subject: Re: [Elecraft] K2 with 144Mhz transverter - phase noise

> it would be quite interesting to know where is the culprit - if K2 or
> the transverter
>
> 73 Martin OK1RR
>
> Fraser Robertson napsal(a):
> > Adi, I've compared two latest spec. K2/100's with a FT1KMP, TS870, and a
> > home brew VFO/Xtal mixer rig, and the close in TX phase noise (unkeyed
> > carrier) of the K2's is worse than the other rigs. I think the figure
> > you quote is probably typical. If there is a way to improve on this I'd
> > love to know as in many respects the K2 is a great rig and I'd like to
> > use it for QRO contesting. (I have not used a transverter).
> >
> > 73 Fraser G4BJM
> >
> >>
> >> NF 6dB, IP3 -26 dBm and TX noise at least 10dB greater than FT1KMP.
> >>
> >> For those who r not familiar with this data I can only say that are
> >> bad....but how???
> >> I suppose the transverter was always the same.
> >>
> >> Why? How?
> >>
> >> TNX for answers...
> >>
> >> S55M-Adi
> >
> >
> > _________________________________________________________________
> > Express yourself instantly with MSN Messenger! Download today - it's
> > FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
> >
> > _______________________________________________
> > Elecraft mailing list
> > Post to: [hidden email]
> > You must be a subscriber to post to the list.
> > Subscriber Info (Addr. Change, sub, unsub etc.):
> > http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/subscribers.htm
> > Elecraft web page: http://www.elecraft.com
> >
>

Eric Swartz - WA6HHQ

Re: K2 with 144Mhz transverter

Administrator

In reply to this post by S55M

It looks like your RBW is way too high, which will increase the apparent
noise level by a large amount. It should be set to 100 Hz also. Set your
sweep to auto so it will go slowly enough to make the measurement. It
will take some time for the sweep.

73, Eric

S55M wrote:

>
> Hy Eric!
>
> Thanks for Your answer.
> The measurment setup is :
> VBW 100Hz
> RBW 10kHz
> Span 500KHz
>
> Any ideas what went wrong????
>
>
> Adi
> ----- Original Message -----
> From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]>
> To: "S55M" <[hidden email]>
> Cc: "Elecraft" <[hidden email]>
> Sent: Thursday, March 10, 2005 6:53 PM
> Subject: Re: [Elecraft] K2 with 144Mhz transverter
>
>
>
>>Hi Adi,
>>
>>There must be something wrong with your K2 or measurement set up. As can
>
> be seen
>
>>from the phase noise plot on our web page (under radio comparisons) the K2
>
> TX
>
>>signal is better than -130 dBc when you get 10-20 kHz away from the
>
> carrier.
>
>>Also, what b/w and span were you using on your 8590 analyzer?
>>
>>On the receive side the XV and K2 pair are among the best out there. I do
>
> not
>
>>know what was different about his set up.
>>
>>73, Eric
>>
>>
>>S55M wrote:
>>
>>>OK...now I'm getting really angry HI HI :))...
>>>First the transmitter (easy one)
>>>
>>>I made a measurment with my HP8590A of the transmitted signal from K2 to
>>>transwerter (signal after the first buffer).
>>>When i moove 100 KHz away from carier there is -73dBc of signal
>
> remaining.
>
>>>After a little bit of conversation with local gurus probably this not to
>>>good number (compared dBc's of other same 1.st class rtx's are -90
>>>to -100dBc)
>>>
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>

S55M

Re: K2 with 144Mhz transverter

Hello Eric!

No it wont go neither that way.
The characteristics of my HP are not good enough for such measurments.So i
changed aproach and now i do tests with another RX directly connected to K2
IF TX out on 14Mhz via the ATT and at the same time coupling in signal
generator at low level (abt -125dBm 5,10,20KHz away from center
frequency.Will try to measure also noise increments whithout and with
carrier .I just must take care to not overload the RX.
First impresion is not so bad but i will write something after the
tests.....

73's
Adi

----- Original Message -----
From: "Eric Swartz WA6HHQ - Elecraft" <[hidden email]>
To: "S55M" <[hidden email]>
Cc: "Elecraft" <[hidden email]>
Sent: Friday, March 11, 2005 5:54 PM
Subject: Re: [Elecraft] K2 with 144Mhz transverter

> It looks like your RBW is way too high, which will increase the apparent
> noise level by a large amount. It should be set to 100 Hz also. Set your
> sweep to auto so it will go slowly enough to make the measurement. It
> will take some time for the sweep.
>
> 73, Eric
>
>
> S55M wrote:
> >
> > Hy Eric!
> >
> > Thanks for Your answer.
> > The measurment setup is :
> > VBW 100Hz
> > RBW 10kHz
> > Span 500KHz
> >
> > Any ideas what went wrong????
> >
> >
> > Adi
> > ----- Original Message -----
> > From: "Eric Swartz - WA6HHQ, Elecraft" <[hidden email]>
> > To: "S55M" <[hidden email]>
> > Cc: "Elecraft" <[hidden email]>
> > Sent: Thursday, March 10, 2005 6:53 PM
> > Subject: Re: [Elecraft] K2 with 144Mhz transverter
> >
> >
> >
> >>Hi Adi,
> >>
> >>There must be something wrong with your K2 or measurement set up. As can
> >
> > be seen
> >
> >>from the phase noise plot on our web page (under radio comparisons) the

> >
> > TX
> >
> >>signal is better than -130 dBc when you get 10-20 kHz away from the
> >
> > carrier.
> >
> >>Also, what b/w and span were you using on your 8590 analyzer?
> >>
> >>On the receive side the XV and K2 pair are among the best out there. I

> >
> > not
> >
> >>know what was different about his set up.
> >>
> >>73, Eric
> >>
> >>
> >>S55M wrote:
> >>
> >>>OK...now I'm getting really angry HI HI :))...
> >>>First the transmitter (easy one)
> >>>
> >>>I made a measurment with my HP8590A of the transmitted signal from K2

to
> >>>transwerter (signal after the first buffer).
> >>>When i moove 100 KHz away from carier there is -73dBc of signal
> >
> > remaining.
> >
> >>>After a little bit of conversation with local gurus probably this not
to

> >>>good number (compared dBc's of other same 1.st class rtx's are -90
> >>>to -100dBc)
> >>>
> >
> >
> > _______________________________________________
> > Elecraft mailing list
> > Post to: [hidden email]
> > You must be a subscriber to post to the list.
> > Subscriber Info (Addr. Change, sub, unsub etc.):
> > http://mailman.qth.net/mailman/listinfo/elecraft
> >
> > Help: http://mailman.qth.net/subscribers.htm
> > Elecraft web page: http://www.elecraft.com
> >
> >