Re: [Elecraft] SWR Readings:Differences

[Vic, K2VCO]

If your line is lossless (it isn't) you would expect the same SWR
readings anywhere along the line. With practical lines that have some
loss, the SWR should be LOWER farther away from the antenna. You are 
getting the opposite result.


One cause of erroneous SWR readings is RF flowing on the outside of the 
coax. If your rotary dipole doesn't have a balun, this could be the cause.


It's also possible that you have a bad connector or bad piece of coax 
between the tower and the K3.


On 9/3/14 3:06 AM, pastor...@verizon.net wrote:

Good Evening, This is Mark Griffin, KB3Z and I have some questions
regarding the SWR readings I get at my tower versus what I get on my
K3. I will give the SWR readings that I got at my tower for a 40
meter rotatable dipole at 55 feet.

Tower:

7000  2.2 7025  1.8 7050  1.5 7075  1.3 7100  1.0 7125  1.1 7150
1.3 7175  1.6 7200  2.0 7225  2.2

K3 Readings:

7000  3.5

7025  3.2

7050  2.9

7075  2.6

7100  2.4

7125  2.3

7150  2.4

7175  2.5

7200  2.6 7225  2.9

What would cause such a big difference. The cable run from my antenna
switch on the tower to my K3 is only an additional 75 feet. I am
using RG-213 cable. Is there anyway that I can test the SWR reading
that my K3 is giving me?

Mark Griffin, KB3Z


--
Vic, K2VCO/4X6GP
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] SWR Readings:Differences

[Fred Jensen]

Just so we all don't confuse Mark, I think he asked a really good question,

If the coax is loss-less [we'll all let you know when you can buy that 
kind:-))], then what the other Fred said is true.  Unfortunately, all 
transmission lines, of whatever flavor, do have losses.  Compared to 
open wire lines, loss in coax is high.


In the early 60's at Keesler AFB, I passed my free time at K5TYP ... I 
enjoyed the people and the activity there.  We had a tribander that 
seemed to receive [sort of}, but we couldn't work anyone on it, and the 
SWR was 1:1 on 20, 15, and 10.  A puzzle.  During one of the testing 
sessions, someone swept the frequency from 10 down to 20 to go do it 
again, and the SWR was 1:1 all the way down.  Our coax had lain open on 
the ground for several years in Biloxi MS, and was full of water.  It 
was basically the longest dummy load in Harrison County MS before any RF 
got to the antenna.  And, it had a 1:1 SWR


Depending on the loss in your coax, your feedline will look more or less 
like a transformer.  More loss means it begins to dominate the 
transformer equation and your SWR at the shack looks better and better.


Again, the bottom line ... Don't stress about SWR unless it causes a 
problem for your transceiver.  If the transmitter is happy, so you 
should be.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

On 9/2/2014 6:57 PM, Fred Townsend wrote:


Hello Mark: Question? What is the SWR of a mile long piece of coax if
it is unterminated. Answer 1:1. That is because a long length coax
will act as a matching transformer. Actually it doesn't have to be
too long as you found out. If reading is not better in the shack
something is wrong.


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Re: [Elecraft] SWR Readings:Differences

[Fred Jensen]

I left your message on this, don't normally do that but I think it is 
important for context.


1.  If the feed point impedance at your antenna is equal to the 
characteristic impedance of your coax *at any given frequency,* then the 
SWR you measure at the rig will be nominally 1:1.  Note that not all SWR 
measuring instruments are created equal.


2.  Measuring the feed point impedance at an antenna is usually somewhat 
hard ... up in the air, maybe not accessible ... you probably get the idea.


3.  Measuring the SWR at the accessible bottom of the tower [I'm 
assuming that's where you're measuring it], and finding it to be 
anything other than 1:1 means that the line is not matched to the 
antenna impedance, and begins acting as an RF transformer.


4.  The SWR you will see in the shack, and remember that all SWR 
indicators are not created equal, will be whatever results in the 
impedance transformation along the length of the coax from the tower to 
the shack.


5.  A Time Domain Reflectometer will help clarify this for you if you 
know how to use one.  Sadly, they're very expensive and hard to 
interpret if you've never used one.  Check around among your friends but 
don't hold your breath.


Bottom line, you can prune or un-prune your antenna [if it's wire] a 
little, and you can adjust the length of the coax transformer to the 
shack to get acceptable SWR at the rig.


Or, if your K3 accepts the SWR, ignore it.  Honestly Mark, you'll never 
know the difference while operating.  There's also the KAT3, your SWR's 
are easily within it's range.


There was a time, in my lifetime, when "Standing Wave Ratio" was NOT an 
amateur radio term.  You "loaded the antenna" and called CQ.  Today's 
radios are significantly more particular to SWR, but if it works, it works.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

On 9/2/2014 5:06 PM, pastor...@verizon.net wrote:

Good Evening, This is Mark Griffin, KB3Z and I have some questions
regarding the SWR readings I get at my tower versus what I get on my
K3. I will give the SWR readings that I got at my tower for a 40
meter rotatable dipole at 55 feet.

Tower:

7000  2.2 7025  1.8 7050  1.5 7075  1.3 7100  1.0 7125  1.1 7150
1.3 7175  1.6 7200  2.0 7225  2.2

K3 Readings:

7000  3.5

7025  3.2

7050  2.9

7075  2.6

7100  2.4

7125  2.3

7150  2.4

7175  2.5

7200  2.6 7225  2.9

What would cause such a big difference. The cable run from my antenna
switch on the tower to my K3 is only an additional 75 feet. I am
using RG-213 cable. Is there anyway that I can test the SWR reading
that my K3 is giving me?

Mark Griffin, KB3Z


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Re: [Elecraft] SWR Readings:Differences

[Fred Townsend]

Hello Mark:
Question? What is the SWR of a mile long piece of coax if it is unterminated.
Answer 1:1. That is because a long length coax will act as a matching 
transformer. Actually it doesn't have to be too long as you found out. If 
reading is not better in the shack something is wrong.

Mark what you are seeing is entirely normal. If you want to measure the antenna 
impedance from the shack you should use something like Time Domain 
Reflectometer.

73
Fred 

-Original Message-
>From: pastor...@verizon.net
>Sent: Sep 2, 2014 5:06 PM
>To: elecraft@mailman.qth.net
>Subject: [Elecraft] SWR Readings:Differences
>
>Good Evening,
>This is Mark Griffin, KB3Z and I have some questions regarding the SWR 
>readings I get at my tower versus what I get on my K3. I will give the SWR 
>readings that I got at my tower for a 40 meter rotatable dipole at 55 feet.
>
>Tower:
>
>7000  2.2
>7025  1.8
>7050  1.5
>7075  1.3
>7100  1.0
>7125  1.1
>7150  1.3
>7175  1.6
>7200  2.0
>7225  2.2
>
>K3 Readings:
>
>7000  3.5
>
>7025  3.2
>
>7050  2.9
>
>7075  2.6
>
>7100  2.4
>
>7125  2.3
>
>7150  2.4
>
>7175  2.5
>
>7200  2.6
>7225  2.9
>
>What would cause such a big difference. The cable run from my antenna switch 
>on the tower to my K3 is only an additional 75 feet. I am using RG-213 cable. 
>Is there anyway that I can test the SWR reading that my K3 is giving me?
>
>Mark Griffin, KB3Z
>
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[Elecraft] Cracked knobs and Elecraft support

[John]

What a company!
I sent an email to Elecraft re broken knobs and a parcel arrived in the mail 
today
with replacements.  No charge.
Again, what a company!
Thank you.
73.
John.
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Re: [Elecraft] SWR Readings:Differences

[Dick Dievendorff]

Can you use the same SWR bridge in the shack that you used at the base of
the tower so you're comparing apples to apples?  I'd take the K3 out of the
equation and figure out why your SWR differs at the base of the tower
compared to in the shack through a 75'  coax run and switch.

I'd expect the SWR to be lower in the shack. If it isn't, then I'd put a
dummy load at the base of the tower, thru the switch, and measure the SWR in
the shack of that dummy load.

Dick, K6KR


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
pastor...@verizon.net
Sent: Tuesday, September 02, 2014 5:07 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] SWR Readings:Differences

Good Evening,
This is Mark Griffin, KB3Z and I have some questions regarding the SWR
readings I get at my tower versus what I get on my K3. I will give the SWR
readings that I got at my tower for a 40 meter rotatable dipole at 55 feet.

Tower:

7000  2.2
7025  1.8
7050  1.5
7075  1.3
7100  1.0
7125  1.1
7150  1.3
7175  1.6
7200  2.0
7225  2.2

K3 Readings:

7000  3.5

7025  3.2

7050  2.9

7075  2.6

7100  2.4

7125  2.3

7150  2.4

7175  2.5

7200  2.6
7225  2.9

What would cause such a big difference. The cable run from my antenna switch
on the tower to my K3 is only an additional 75 feet. I am using RG-213
cable. Is there anyway that I can test the SWR reading that my K3 is giving
me?

Mark Griffin, KB3Z

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delivered to d...@elecraft.com

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Re: [Elecraft] P3 grounding lug?

[Jim Brown]

On Tue,9/2/2014 4:58 PM, Jim Miller wrote:

How have others bonded the P3?


I've never bonded the P3. I do use serial cables that bond connector 
shell to connector shell between computer and P3, and I don't use the 
BNC cables that Elecraft provides. As others have noted, there have been 
problems with their BNC cables. My first (of three) P3s came with an 
open BNC cable.


I have very little negative to say about the K3, EXCEPT for their 
treatment of cable shields (The Pin One Problem). The ONLY proper 
termination of a cable shield is the shielding enclosure (the chassis). 
Elecraft fails to do this on most of the audio and control lines, and 
this sort of construction error is a common cause of hum, buzz, and RFI.


73, Jim K9YC
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[Elecraft] Off-topic : discussion forum of Mercedes Benz (not radio related)

[Johnny Siu]

Dear elecrafters,

It is off-topic and not radio related, please delete now if you are not 
interested.

I have been driving a 2001 Mercedes C200k W203 M111 since Jun 2001.  I would 
like to learn more knowledge about repair, maintenance and spare parts of my 
car.  Is there any discussion forum in USA (or other English speaking 
countries) about Mercedes with member quality comparable to this Elecraft mail 
listing?

I should be grateful if you could reply OFF-THE-LIST and apologize for the 
S9+60db QRM here. 

Thanks for your patience and tolerance as always.

73

Johnny VR2XMC
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Re: [Elecraft] P3 grounding lug?

[Jim Miller]

Don

Thanks!

jim


On Tue, Sep 2, 2014 at 8:33 PM, Don Wilhelm  wrote:

> Jim,
>
> Remove any convenient screw and put an internal tooth
> #4 solder lug under it to serve as a bonding point for the P3 enclosure.
>
> Jim, K9YC will likely point out the "pin 1" problems and may offer
> additional suggestions.
>
> 73,
> Don W3FPR
>
>
> On 9/2/2014 8:16 PM, Jim Miller wrote:
>
>> Still would like to bond the P3.
>>
>>
>>
>
>
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Re: [Elecraft] P3 grounding lug?

[Don Wilhelm]

Jim,

Remove any convenient screw and put an internal tooth
#4 solder lug under it to serve as a bonding point for the P3 enclosure.

Jim, K9YC will likely point out the "pin 1" problems and may offer 
additional suggestions.


73,
Don W3FPR

On 9/2/2014 8:16 PM, Jim Miller wrote:

Still would like to bond the P3.




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Re: [Elecraft] P3 grounding lug?

[Jim Miller]

Replaced the coax cable a long time ago when the P3 was acting up. That's
not the problem right now.

Actually I now have everything disconnected from the K3 and I'm still
getting some audio noise. I suspect I've got pickup some computer equipment.

Working on that now.

Still would like to bond the P3.

jim


On Tue, Sep 2, 2014 at 8:12 PM, Johnny Siu  wrote:

> Hello Jim,
>
> Did you replace the coaxial jumper between the P3 and K3 with a new one
> (with proper shielding) ?  Some of the jumpers supplied by elecraft are
> defective (or not up to standard).
>
> 73
>
> Johnny VR2XMC
>
>   --
>  *寄件人︰* Jim Miller 
> *收件人︰* Elecraft Reflector 
> *傳送日期︰* 2014年09月3日 (週三) 7:58 AM
> *主題︰* [Elecraft] P3 grounding lug?
>
> I'm chasing noise in my headphones. I've noticed that turning off the P3
> lowers the noise and I noticed there isn't a bonding point on the back of
> the case.
>
> How have others bonded the P3?
>
> jim ab3cv
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>
>
>
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[Elecraft] P3 grounding lug?

[Johnny Siu]

Hello Jim,

Did you replace the coaxial jumper between the P3 and K3 with a new one (with 
proper shielding) ?  Some of the jumpers supplied by elecraft are defective (or 
not up to standard).

73

Johnny VR2XMC



 寄件人︰ Jim Miller 
收件人︰ Elecraft Reflector  
傳送日期︰ 2014年09月3日 (週三) 7:58 AM
主題︰ [Elecraft] P3 grounding lug?
 

I'm chasing noise in my headphones. I've noticed that turning off the P3
lowers the noise and I noticed there isn't a bonding point on the back of
the case.

How have others bonded the P3?

jim ab3cv
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[Elecraft] SWR Readings:Differences

[pastormg2]

Good Evening,
This is Mark Griffin, KB3Z and I have some questions regarding the SWR readings 
I get at my tower versus what I get on my K3. I will give the SWR readings that 
I got at my tower for a 40 meter rotatable dipole at 55 feet.

Tower:

7000  2.2
7025  1.8
7050  1.5
7075  1.3
7100  1.0
7125  1.1
7150  1.3
7175  1.6
7200  2.0
7225  2.2

K3 Readings:

7000  3.5

7025  3.2

7050  2.9

7075  2.6

7100  2.4

7125  2.3

7150  2.4

7175  2.5

7200  2.6
7225  2.9

What would cause such a big difference. The cable run from my antenna switch on 
the tower to my K3 is only an additional 75 feet. I am using RG-213 cable. Is 
there anyway that I can test the SWR reading that my K3 is giving me?

Mark Griffin, KB3Z

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Re: [Elecraft] [PX3] Bandwidth Question

[Tom]

Hi Chris, 
You are doing something wrong if you only get 60 kHz.. My experience at least 
with win4k3suite,  is that 192 kHz is pretty routine with any card that 
supports it. 
73s Tom 




 Original message 
From: Chris Johnson  
Date: 02/09/2014  18:41  (GMT-05:00) 
To: Elecraft List  
Subject: [Elecraft] [PX3] Bandwidth Question 
 
I'm curious how the PX3 is getting nearly 200Khz of bandwidth from the I/Q out 
on the KX3.   Using a really high quality sound card,  I barely get 60Khz wide 
if that and there is significant roll off.   Is there a hidden super secret 
high BW output magic trickery going on here?

Anxiously awaiting shipment..

Chris
K6OZY
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[Elecraft] P3 grounding lug?

[Jim Miller]

I'm chasing noise in my headphones. I've noticed that turning off the P3
lowers the noise and I noticed there isn't a bonding point on the back of
the case.

How have others bonded the P3?

jim ab3cv
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Re: [Elecraft] K3 filter plots

[N2TK, Tony]

Boy, do I feel dumb. 
Tnx for reminding me to refresh the page. It works fine now. Now I will
crawl away with my tail between my legs. 
It must be beer-thirty somewhere.
N2TK, Tony

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred
Townsend
Sent: Tuesday, September 02, 2014 4:29 PM
To: Joe Subich,W4TV; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots

Have you refreshed your page?


-Original Message-
>From: "Joe Subich, W4TV" 
>Sent: Sep 2, 2014 12:39 PM
>To: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] K3 filter plots
>
>
>They certainly don't work for me.
>
>73,
>
>... Joe, W4TV
>
>
>On 2014-09-02 3:28 PM, Thomas R. Houston wrote:
>> Actually, Ed, both the link and the link to the crystal filter plots 
>> work for me.
>>
>> Tom K6OKE
>>
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of 
>> Ed Muns
>> Sent: Tuesday, September 02, 2014 11:39 AM
>> To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; 
>> bran...@elecraft.com
>> Cc: elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] K3 filter plots
>>
>> Yes, the link below works, but the link to the crystal filter plots 
>> that is at that top of that webpage is broken.
>>
>> Ed W0YK
>>
>> -
>>
>> Phil W7OX wrote:
>>
>> This link can be useful and still works:
>> http://www.elecraft.com/K3/Roofing_Filters.htm
>>
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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[David Woolley]

Air-conditioning controllers should have a much smaller hunting range 
than that.  Cooling systems are not common in the UK, but even bi-metal 
thermostats, for heating systems, had a built in heating element, so the 
thermostat would switch off much faster than would be the case it you 
had to wait for the air in the room and the hysteresis of the switch. 
Substituting on for off, that should work for cooling as well.


Whilst this produces a de facto pulse width modulation, electronic 
controllers explicitly pulse width modulate based on the analogue value 
of the process variable, when it is close to the set point.  Mine has a 
default pulse frequency of 1.... mHz, although it is adjustable 
between about 0.8333 mHz and 3. mHz, in 0.8333 mHz steps.  The 
hunting range is really too small to resolve on an alcohol analogue 
thermometer.


--
David Woolley
Owner K2 06123


On 02/09/14 18:34, Don Wilhelm wrote:

If performed in an air conditioned space, consider the hysteresis in the
thermostat controlling the AC (if the thermostat is set for 72 degF, it
may come on when the room temperature reaches 74 degF and turn off when
the room temperature drops to 70 degF - it all depends on the
characteristics of the thermostat).


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Re: [Elecraft] [PX3] Bandwidth Question

[Fred Jensen]

On 9/2/2014 3:41 PM, Chris Johnson wrote:

I'm curious how the PX3 is getting nearly 200Khz of bandwidth from
the I/Q out on the KX3.   Using a really high quality sound card,  I
barely get 60Khz wide if that and there is significant roll off.   Is
there a hidden super secret high BW output magic trickery going on
here?


Yes.  They fold the rest of the BW up into hyperspace. :-)  Actually, I 
don't have a clue.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

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Re: [Elecraft] [PX3] Bandwidth Question

[Paul Saffren N6HZ]

Hi Ozy, 

At 200 KHz span, we're sampling 24 bits at 216 KHz and then using
equalization to correct for the roughly 10 dB of roll-off which starts
around 50 KHz . 

73, 

Paul



Ozy wrote
> I'm curious how the PX3 is getting nearly 200Khz of bandwidth from the I/Q
> out on the KX3.   Using a really high quality sound card,  I barely get
> 60Khz wide if that and there is significant roll off.   Is there a hidden
> super secret high BW output magic trickery going on here?
> 
> Anxiously awaiting shipment..
> 
> Chris
> K6OZY
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View this message in context: 
http://elecraft.365791.n2.nabble.com/PX3-Bandwidth-Question-tp7592744p7592745.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] [PX3] Bandwidth Question

[Chris Johnson]

I'm curious how the PX3 is getting nearly 200Khz of bandwidth from the I/Q out 
on the KX3.   Using a really high quality sound card,  I barely get 60Khz wide 
if that and there is significant roll off.   Is there a hidden super secret 
high BW output magic trickery going on here?

Anxiously awaiting shipment..

Chris
K6OZY
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Re: [Elecraft] K3 filter plots

[Joe Subich, W4TV]

The "Roofing filters" page
 
works.  The link on that page:
 
does not work.  When one adds an extra K3 in the link
  
the page opens but the images do not work unless "K3"
is added after elecraft.com

73,

   ... Joe, W4TV


On 2014-09-02 6:00 PM, Matt VK2RQ wrote:

You are probably using a cached version of the K3 roofing filter page. In the current 
version of that page, the URL to the filter plots is missing the "K3" directory 
in the URL. If you add it in manually, you get:

http://www.elecraft.com/K3/K3_filter_plots.htm

Which does work, but the filter plots are all blank. Again, probably due to 
missing elements in the directory path in the URLs to the images.

This is similar to a problem that was reported with the K3 FAQ page -- it would 
seem whatever software Elecraft is using to manage their web page is ignoring 
the site directory structure when forming links and is pointing them all to the 
root document directory.

73,
Matt VK2RQ


On 3 Sep 2014, at 7:42 am, Phil Wheeler  wrote:

The links work for me -- but the plots are blank.

Phil W7OX


On 9/2/14, 12:39 PM, Joe Subich, W4TV wrote:

They certainly don't work for me.

73,

   ... Joe, W4TV



On 2014-09-02 3:28 PM, Thomas R. Houston wrote:
Actually, Ed, both the link and the link to the crystal filter plots work
for me.

Tom K6OKE

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of Ed Muns
Sent: Tuesday, September 02, 2014 11:39 AM
To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; bran...@elecraft.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots

Yes, the link below works, but the link to the crystal filter plots that is
at that top of that webpage is broken.

Ed W0YK

-

Phil W7OX wrote:

This link can be useful and still works:
http://www.elecraft.com/K3/Roofing_Filters.htm


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Re: [Elecraft] K3 filter plots

[Eric Swartz WA6HHQ - Elecraft]

Sorry about that! We are in the process of fixing the broken plot images.

73,

Eric
elecraft.com
_..._



> On Sep 2, 2014, at 2:42 PM, Phil Wheeler  wrote:
> 
> The links work for me -- but the plots are blank.
> 
> Phil W7OX
> 
>> On 9/2/14, 12:39 PM, Joe Subich, W4TV wrote:
>> 
>> They certainly don't work for me.
>> 
>> 73,
>> 
>>   ... Joe, W4TV
>> 
>> 
>>> On 2014-09-02 3:28 PM, Thomas R. Houston wrote:
>>> Actually, Ed, both the link and the link to the crystal filter plots work
>>> for me.
>>> 
>>> Tom K6OKE
>>> 
>>> -Original Message-
>>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of Ed Muns
>>> Sent: Tuesday, September 02, 2014 11:39 AM
>>> To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; bran...@elecraft.com
>>> Cc: elecraft@mailman.qth.net
>>> Subject: Re: [Elecraft] K3 filter plots
>>> 
>>> Yes, the link below works, but the link to the crystal filter plots that is
>>> at that top of that webpage is broken.
>>> 
>>> Ed W0YK
>>> 
>>> -
>>> 
>>> Phil W7OX wrote:
>>> 
>>> This link can be useful and still works:
>>> http://www.elecraft.com/K3/Roofing_Filters.htm
> 
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Re: [Elecraft] K3 filter plots

[Matt VK2RQ]

You are probably using a cached version of the K3 roofing filter page. In the 
current version of that page, the URL to the filter plots is missing the "K3" 
directory in the URL. If you add it in manually, you get:

http://www.elecraft.com/K3/K3_filter_plots.htm

Which does work, but the filter plots are all blank. Again, probably due to 
missing elements in the directory path in the URLs to the images.

This is similar to a problem that was reported with the K3 FAQ page -- it would 
seem whatever software Elecraft is using to manage their web page is ignoring 
the site directory structure when forming links and is pointing them all to the 
root document directory.

73,
Matt VK2RQ

> On 3 Sep 2014, at 7:42 am, Phil Wheeler  wrote:
> 
> The links work for me -- but the plots are blank.
> 
> Phil W7OX
> 
>> On 9/2/14, 12:39 PM, Joe Subich, W4TV wrote:
>> 
>> They certainly don't work for me.
>> 
>> 73,
>> 
>>   ... Joe, W4TV
>> 
>> 
>>> On 2014-09-02 3:28 PM, Thomas R. Houston wrote:
>>> Actually, Ed, both the link and the link to the crystal filter plots work
>>> for me.
>>> 
>>> Tom K6OKE
>>> 
>>> -Original Message-
>>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of Ed Muns
>>> Sent: Tuesday, September 02, 2014 11:39 AM
>>> To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; bran...@elecraft.com
>>> Cc: elecraft@mailman.qth.net
>>> Subject: Re: [Elecraft] K3 filter plots
>>> 
>>> Yes, the link below works, but the link to the crystal filter plots that is
>>> at that top of that webpage is broken.
>>> 
>>> Ed W0YK
>>> 
>>> -
>>> 
>>> Phil W7OX wrote:
>>> 
>>> This link can be useful and still works:
>>> http://www.elecraft.com/K3/Roofing_Filters.htm
> 
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Re: [Elecraft] K3 filter plots

[Phil Wheeler]

The links work for me -- but the plots are blank.

Phil W7OX

On 9/2/14, 12:39 PM, Joe Subich, W4TV wrote:


They certainly don't work for me.

73,

   ... Joe, W4TV


On 2014-09-02 3:28 PM, Thomas R. Houston wrote:
Actually, Ed, both the link and the link to the 
crystal filter plots work

for me.

Tom K6OKE

-Original Message-
From: Elecraft 
[mailto:elecraft-boun...@mailman.qth.net]On 
Behalf Of Ed Muns

Sent: Tuesday, September 02, 2014 11:39 AM
To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. 
Hvizdak'; bran...@elecraft.com

Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots

Yes, the link below works, but the link to the 
crystal filter plots that is

at that top of that webpage is broken.

Ed W0YK

-

Phil W7OX wrote:

This link can be useful and still works:
http://www.elecraft.com/K3/Roofing_Filters.htm


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[Elecraft] A Comparative Performance Assessment of Aftermarket KX3 Heatsinks

[Howard Hoyt]

Hi All,

I read the report with interest, and thank those involved for reporting 
what they observed.  I will share some observations on my website, I 
believe it is not a good use of list bandwidth to have two manufacturers 
discussing each others wares on an Elecraft list.


Cheers & 73,

Howie - WA4PSC
www.proaudioeng.com
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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Dennis Griffin]

I too had to wonder about a few of the report comments.

At what distance from the KX3 was the "still air" temperature taken, and how 
was it maintained within plus or minus .5° C if it was still, but in fact was 
being acted on by the convective currents caused by the heat radiated by the 
heat sink. Certainly the room may have held temp within that tolerance, but 
surely the air immediately around the heat sink didn't.

Was the still air around the KX3 allowed to normalize between tests, or was 
each successive test performed in an increasingly warmer envelop of air 
immediately around the test unit?

What instrument was used for the air temp measurement to a resolution of at 
least .5° C, that couldn't also have been used to measure the temperature at 
some fixed point relative to the heat sinks, whether it reported NIST accurate 
values, or only just relative and repeatable values. Since the temp reported by 
the KX3 only has 1° C of resolution, I can see the potential to have a .9° C 
margin of error in reported values, or a .1° C actual difference leading to a 
reported 1° C difference.

How representative is 25° C as an ambient operating temperature for someone who 
feels the need for the benefit of a heat sink? Probably close enough for 
someone operating in their shack. But how do the results translate to any noted 
differences when operating portable at 0° C, or 37° C, or at 25° C & 90% RH?

Fine points, admittedly, but curiosities none the less.

73 de Dennis KD7CAC
Scottsdale, AZ

On Sep 2, 2014, at 11:39 AM, Don Wilhelm  wrote:

> That is true, but that is still inadequate information for environmentally 
> related measurements.
> Exactly how was that measured?  What was the measurement device, when was it 
> last calibrated, was the calibration traceable to a secondary NIST standard?  
> Was the point where the temperature was measured identified and consistent 
> from test to test?  How were the initial conditions determined?  Within what 
> degree of certainty? Was the air flow actually monitored during the test and 
> from test run to test run - how was it measured and at what position(s) - why 
> does still air have to be in quotes? Without that kind information, we have 
> to make assumptions that may or may not be valid.
> 
> Making system level measurements on environmentally related tests requires 
> that every piece of the environment be specified - down to the placement of 
> the DUT in the environment.
> 
> My 10 years professional experience with engineering level measurements has 
> lead me to question every piece of test equipment as well as how it is used 
> as well as identification of the test setup.
> That information is important to determine that degree of error in the 
> overall measurements.
> Environmental testing requires much more setup and environment data than 
> making voltage checks because there are many factors that may alter the data.
> 
> 73,
> Don W3FPR
> 
> On 9/2/2014 1:55 PM, Gary W. Hvizdak wrote:
>> P.S.  Don, Adrian's test report clearly states that he conducted all of his
>> tests in "still air" and that the ambient temperature remained between a
>> half degree of 25 degrees C.
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Re: [Elecraft] K3 filter plots

[Fred Townsend]

Have you refreshed your page?


-Original Message-
>From: "Joe Subich, W4TV" 
>Sent: Sep 2, 2014 12:39 PM
>To: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] K3 filter plots
>
>
>They certainly don't work for me.
>
>73,
>
>... Joe, W4TV
>
>
>On 2014-09-02 3:28 PM, Thomas R. Houston wrote:
>> Actually, Ed, both the link and the link to the crystal filter plots work
>> for me.
>>
>> Tom K6OKE
>>
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of Ed Muns
>> Sent: Tuesday, September 02, 2014 11:39 AM
>> To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; bran...@elecraft.com
>> Cc: elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] K3 filter plots
>>
>> Yes, the link below works, but the link to the crystal filter plots that is
>> at that top of that webpage is broken.
>>
>> Ed W0YK
>>
>> -
>>
>> Phil W7OX wrote:
>>
>> This link can be useful and still works:
>> http://www.elecraft.com/K3/Roofing_Filters.htm
>>
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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Fred Townsend]

Gary radiation effects do not vary linearly as a function of ambient 
temperature  and are IMHO, a bigger error factor than anything Don has 
mentioned therefore ambient temperature should be stated. Also, again IMHO 
thermal resistance is a much better comparison between heatsinks. Ambient temp 
is needed if thermal resistance is to be computed.

73
Fred, AE6QL


-Original Message-
>From: "Gary W. Hvizdak" 
>Sent: Sep 2, 2014 12:23 PM
>To: elecraft@mailman.qth.net
>Subject: Re: [Elecraft] [KX3] A Comparative Performance Assessment (of 
>Aftermarket KX3 Heatsinks)
>
>Don (W3FPR) recently wrote ...
>
>"why does still air have to be in quotes?"
>
>Hi Don,
>
>That was done so the wording "in still air" wouldn't seem like a
>grammatical error.  More importantly, here's an excerpt from a recent email
>from Adrian, addressing your inquiry regarding ambient temperature:
>
>"The ambient temperature was constantly monitored on the test bench by the
>transceiver using a very sensitive aviation anemometer.  This instrument can
>measure airflow down to fractions of a knot, and does so by monitoring
>temperature changes of a heated thermistor, as well as using a ducted fan
>whose speed is measured via a pulse-counting technique for higher speeds.  I
>managed to keep the ambient temperature stable throughout the test to within
>an indicated 0.5 degree C, so I was quite pleased with the actual test
>results."
>
>--- - - - ---
>
>I certainly could have included details like this in the final report,
>but tried to avoid providing too much information, and also tried to limit
>the document to two pages without resorting to a tiny font.  More
>importantly, IMHO Adrian's test environment and methodology were sufficient
>for his intended objective, which was to compare the performance of the
>various aftermarket offerings to one another, for the purpose of ranking
>them.  Yes, higher resolution temperature measurements would have made the
>results more meaningful; but that evaluation is left as an exercise for the
>reader.
>
>BTW, check out http://www.ve7fmn.ca/faqs/#about_testing for a
>description and photo of the setup Adrian had used for his original
>comparison of the factory/stock heatsink and his Cooler KX(TM) Lite, which
>used an entirely different methodology.
>
>73,
>Gary  KI4GGX
>webmaster http://www.ve7fmn.ca/
>
>
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Re: [Elecraft] 4m-Transverter for K3?

[Edward R Cole]

Another source of 4m transverters is Down East Microwave.

I build their kits on order and recently sent a L70-28 25w 
transverter to Europe.

http://www.kl7uw.com/kits.htm
yes- you can go to my website safely, now - but only partially restored


Currently, I am building a DEMI 902-144 10w transverter for a ham in NY.
DEMI is now back in stock of kits for 50-432 MHz.

73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Peter Pauly]

The Canadian heatsink looked fine, but for me, the deciding factor was
price - with shipping the Canadian product was much more than the PAE one.


On Tue, Sep 2, 2014 at 3:23 PM, Gary W. Hvizdak 
wrote:

> Don (W3FPR) recently wrote ...
>
> "why does still air have to be in quotes?"
>
> Hi Don,
>
> That was done so the wording "in still air" wouldn't seem like a
> grammatical error.  More importantly, here's an excerpt from a recent email
> from Adrian, addressing your inquiry regarding ambient temperature:
>
> "The ambient temperature was constantly monitored on the test bench by the
> transceiver using a very sensitive aviation anemometer.  This instrument
> can
> measure airflow down to fractions of a knot, and does so by monitoring
> temperature changes of a heated thermistor, as well as using a ducted fan
> whose speed is measured via a pulse-counting technique for higher speeds.
> I
> managed to keep the ambient temperature stable throughout the test to
> within
> an indicated 0.5 degree C, so I was quite pleased with the actual test
> results."
>
> --- - - - ---
>
> I certainly could have included details like this in the final report,
> but tried to avoid providing too much information, and also tried to limit
> the document to two pages without resorting to a tiny font.  More
> importantly, IMHO Adrian's test environment and methodology were sufficient
> for his intended objective, which was to compare the performance of the
> various aftermarket offerings to one another, for the purpose of ranking
> them.  Yes, higher resolution temperature measurements would have made the
> results more meaningful; but that evaluation is left as an exercise for the
> reader.
>
> BTW, check out http://www.ve7fmn.ca/faqs/#about_testing for a
> description and photo of the setup Adrian had used for his original
> comparison of the factory/stock heatsink and his Cooler KX(TM) Lite, which
> used an entirely different methodology.
>
> 73,
> Gary  KI4GGX
> webmaster http://www.ve7fmn.ca/
>
>
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[Elecraft] Build, Rescue, or Service your Elecraft?

[Alan D. Wilcox]

Hello,

Have you always wanted an Elecraft? A KX1, K1, K2, K3, whatever?
I build and service them all!

See what my clients have said about my construction and service work at
http://www.eham.net/reviews/detail/6768

See the popular "Twins" ... the KPA100 and KAT100 in EC2 enclosure at
http://wilcoxengineering.com/kpa100-in-ec2/

In addition to tuning your rig, I can also rescue a building
project you might have started some time ago.

Cheers,
Alan

Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-478-0736
Williamsport, PA 17701
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Re: [Elecraft] K3 filter plots

[Joe Subich, W4TV]

They certainly don't work for me.

73,

   ... Joe, W4TV


On 2014-09-02 3:28 PM, Thomas R. Houston wrote:

Actually, Ed, both the link and the link to the crystal filter plots work
for me.

Tom K6OKE

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of Ed Muns
Sent: Tuesday, September 02, 2014 11:39 AM
To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; bran...@elecraft.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots

Yes, the link below works, but the link to the crystal filter plots that is
at that top of that webpage is broken.

Ed W0YK

-

Phil W7OX wrote:

This link can be useful and still works:
http://www.elecraft.com/K3/Roofing_Filters.htm

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Re: [Elecraft] K3 filter plots

[Thomas R. Houston]

Actually, Ed, both the link and the link to the crystal filter plots work
for me.

Tom K6OKE

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of Ed Muns
Sent: Tuesday, September 02, 2014 11:39 AM
To: 'Phil Wheeler'; 'N2TK, Tony'; 'Gary W. Hvizdak'; bran...@elecraft.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots

Yes, the link below works, but the link to the crystal filter plots that is
at that top of that webpage is broken.

Ed W0YK

-

Phil W7OX wrote:

This link can be useful and still works:
http://www.elecraft.com/K3/Roofing_Filters.htm

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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Gary W. Hvizdak]

Don (W3FPR) recently wrote ...

"why does still air have to be in quotes?"

Hi Don,

That was done so the wording "in still air" wouldn't seem like a
grammatical error.  More importantly, here's an excerpt from a recent email
from Adrian, addressing your inquiry regarding ambient temperature:

"The ambient temperature was constantly monitored on the test bench by the
transceiver using a very sensitive aviation anemometer.  This instrument can
measure airflow down to fractions of a knot, and does so by monitoring
temperature changes of a heated thermistor, as well as using a ducted fan
whose speed is measured via a pulse-counting technique for higher speeds.  I
managed to keep the ambient temperature stable throughout the test to within
an indicated 0.5 degree C, so I was quite pleased with the actual test
results."

--- - - - ---

I certainly could have included details like this in the final report,
but tried to avoid providing too much information, and also tried to limit
the document to two pages without resorting to a tiny font.  More
importantly, IMHO Adrian's test environment and methodology were sufficient
for his intended objective, which was to compare the performance of the
various aftermarket offerings to one another, for the purpose of ranking
them.  Yes, higher resolution temperature measurements would have made the
results more meaningful; but that evaluation is left as an exercise for the
reader.

BTW, check out http://www.ve7fmn.ca/faqs/#about_testing for a
description and photo of the setup Adrian had used for his original
comparison of the factory/stock heatsink and his Cooler KX(TM) Lite, which
used an entirely different methodology.

73,
Gary  KI4GGX
webmaster http://www.ve7fmn.ca/


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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Don Wilhelm]

All factors that I have mentioned in prior emails relate to 
determination of the potential error range in the testing.  That and 
that alone will determine whether a 1 degC difference shown on the 
graphs is real or should be disregarded.  Note that is *only* related to 
the data points shown.  In other words, what is the uncertainty range of 
the data.


OTOH, if the question relates to whether 1 degC matters to the hardware, 
then one must consider the temperature on which the question is based.  
1 degC is not likely to matter around 40 degC, but *will* be significant 
at 59 or 60 degC.


73,
Don W3FPR

On 9/2/2014 1:55 PM, Gary W. Hvizdak wrote:

On Tue Sep 2 2014 at 13:19:20 EDT, Al Lorona  (W6LX) posted ...

Here's a dumb question ... does 1° deg C. really matter?
  
--- - - - ---





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[Elecraft] PX3

[Richard Thorpe]

Has anyone got their PX3 shipping notice yet?

K6CG/VE1 Nova Scotia Canada
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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Dennis Griffin]

OK, thanks Gary.

On several occasions, I've seen mention, relative to heat sink color, of a 
black coating absorbing direct sunlight, causing warming of the object. Living 
in the Phoenix area, I fail to understand why anyone would operate, at least 
for any length of time, in direct sunlight. I'm not going to subject my 
equipment, whether it be my KX3, any other electronic device, or the leather 
seat on my Vespa, to solar exposure that I wouldn't expose my head to. I most 
always wear a hat or helmet if I'm out in it, and I show my equipment the same 
consideration of being shaded whenever possible. Maybe only desert dwellers 
think this way, hi.

73 de Dennis KD7CAC
Scottsdale, AZ

On Sep 2, 2014, at 11:35 AM, Gary W. Hvizdak  wrote:

> Dennis (KD7CAC) recently posted ...
> 
> "I find it curious that there was no mention ... of what surface coating or
> surface finishing process the tested heat sinks had been subjected to. ...
> I'm also curious if Fred's lower cost version is still the original size
> ..."
> 
> --- - - - ---
> 
> Hi Dennis,
> 
>The details regarding finish were omitted from his report for the sake
> of brevity.  In fact, Adrian evaluated four Cooler KX(TM) configurations,
> one each painted and unpainted Lite and Plus model.  The reason this
> information wasn't included, is that the coating had no discernable impact
> on performance.
> 
>Addressing your questions about size ... Fred offers two models:  his
> original (Lite) model is 1.25 inches deep and his newer Plus model (which
> was introduced back in April as "Tropical") was originally 1.5" deep.
> However, in July he increased its depth by 7% to 1.59 inches.  And yes,
> Fred's Matte Black finish is electrostatically applied / heat cured power
> coat paint, although the entire bottom (heat transfer) surface is unpainted.
> 
>Fred also offers two choices of unpainted finish:  a premium Clear
> Chromate Conversion undercoat; and raw aluminum (straight from the mill).
> 
> 73,
> Gary  KI4GGX
> webmaster  http://www.ve7fmn.ca/
> 
> P.S.  I encouraged Fred to rebrand his Tropical model as Plus, after one
> reviewer (on the eHam website) seemed to imply that the heatsink could be
> operated in direct sunlight without concern.  Intuition suggests that an
> unpainted finish would be preferable for operating under intense tropical
> sun, although even that should be avoided (IMHO).
> 
> 

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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Don Wilhelm]

That is true, but that is still inadequate information for 
environmentally related measurements.
Exactly how was that measured?  What was the measurement device, when 
was it last calibrated, was the calibration traceable to a secondary 
NIST standard?  Was the point where the temperature was measured 
identified and consistent from test to test?  How were the initial 
conditions determined?  Within what degree of certainty? Was the air 
flow actually monitored during the test and from test run to test run - 
how was it measured and at what position(s) - why does still air have to 
be in quotes? Without that kind information, we have to make assumptions 
that may or may not be valid.


Making system level measurements on environmentally related tests 
requires that every piece of the environment be specified - down to the 
placement of the DUT in the environment.


My 10 years professional experience with engineering level measurements 
has lead me to question every piece of test equipment as well as how it 
is used as well as identification of the test setup.
That information is important to determine that degree of error in the 
overall measurements.
Environmental testing requires much more setup and environment data than 
making voltage checks because there are many factors that may alter the 
data.


73,
Don W3FPR

On 9/2/2014 1:55 PM, Gary W. Hvizdak wrote:

P.S.  Don, Adrian's test report clearly states that he conducted all of his
tests in "still air" and that the ambient temperature remained between a
half degree of 25 degrees C.




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Re: [Elecraft] K3 filter plots

[Ed Muns]

Yes, the link below works, but the link to the crystal filter plots that is
at that top of that webpage is broken.

Ed W0YK

-

Phil W7OX wrote:

This link can be useful and still works: 
http://www.elecraft.com/K3/Roofing_Filters.htm

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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Gary W. Hvizdak]

Dennis (KD7CAC) recently posted ...

"I find it curious that there was no mention ... of what surface coating or
surface finishing process the tested heat sinks had been subjected to. ...
I'm also curious if Fred's lower cost version is still the original size
..."

--- - - - ---

Hi Dennis,

The details regarding finish were omitted from his report for the sake
of brevity.  In fact, Adrian evaluated four Cooler KX(TM) configurations,
one each painted and unpainted Lite and Plus model.  The reason this
information wasn't included, is that the coating had no discernable impact
on performance.

Addressing your questions about size ... Fred offers two models:  his
original (Lite) model is 1.25 inches deep and his newer Plus model (which
was introduced back in April as "Tropical") was originally 1.5" deep.
However, in July he increased its depth by 7% to 1.59 inches.  And yes,
Fred's Matte Black finish is electrostatically applied / heat cured power
coat paint, although the entire bottom (heat transfer) surface is unpainted.

Fred also offers two choices of unpainted finish:  a premium Clear
Chromate Conversion undercoat; and raw aluminum (straight from the mill).

73,
Gary  KI4GGX
webmaster  http://www.ve7fmn.ca/

P.S.  I encouraged Fred to rebrand his Tropical model as Plus, after one
reviewer (on the eHam website) seemed to imply that the heatsink could be
operated in direct sunlight without concern.  Intuition suggests that an
unpainted finish would be preferable for operating under intense tropical
sun, although even that should be avoided (IMHO).


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Re: [Elecraft] K3 filter plots

[N2TK, Tony]

Tnx Phil, but it doesn't work here.

N2TK, Tony

 

From: Phil Wheeler [mailto:w...@socal.rr.com] 
Sent: Tuesday, September 02, 2014 2:11 PM
To: N2TK, Tony; 'Gary W. Hvizdak'; bran...@elecraft.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots

 

This link can be useful and still works:
http://www.elecraft.com/K3/Roofing_Filters.htm

Phil W7OX

On 9/2/14, 10:35 AM, N2TK, Tony wrote:

Thanks Gary,
A friend just bought a K3 and was asking about filter recommendations, which
I made. But wanted to show him the filter characteristics.
73,
N2TK, Tony
 
-Original Message-
From: Gary W. Hvizdak [mailto:gary.hviz...@cfl.rr.com] 
Sent: Tuesday, September 02, 2014 1:26 PM
To: bran...@elecraft.com
Cc: tony@verizon.net; elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3 filter plots
 
On Tue Sep 2 2014 at 12:35:38 EDT Tony, N2TK posted ...
 
What happened to the 5-pole and 8-pole filter plots on the Elecraft web
site?
 
--- - - - ---
 
Tony, the page is "broken"!
 
--- - - - ---
 
Brandon,
 
The page http://www.elecraft.com/K3/K3_filter_plots.htm is "broken" in
that the plots are no longer displayed.
 
TNX & 73,
Gary  KI4GGX

 

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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Phil Wheeler]

It seems like the difference between 59 deg-C and 
60 deg-C might matter :-)


Phil W7OX

On 9/2/14, 10:19 AM, Al Lorona wrote:
  
Here's a dumb question from a person with little thermal engineering knowledge: As these various heat sinks are being compared, does 1° deg C. really matter?
  
Al  W6LX


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Re: [Elecraft] FTDX5000 Design Flaw

[dw]

Super impressed
Wonderful piece of work Jim!!!
-- 
 bw...@fastmail.net

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Re: [Elecraft] K3 filter plots

[Phil Wheeler]

This link can be useful and still works: 
http://www.elecraft.com/K3/Roofing_Filters.htm


Phil W7OX

On 9/2/14, 10:35 AM, N2TK, Tony wrote:

Thanks Gary,
A friend just bought a K3 and was asking about filter recommendations, which
I made. But wanted to show him the filter characteristics.
73,
N2TK, Tony

-Original Message-
From: Gary W. Hvizdak [mailto:gary.hviz...@cfl.rr.com]
Sent: Tuesday, September 02, 2014 1:26 PM
To: bran...@elecraft.com
Cc: tony@verizon.net; elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3 filter plots

On Tue Sep 2 2014 at 12:35:38 EDT Tony, N2TK posted ...

What happened to the 5-pole and 8-pole filter plots on the Elecraft web
site?

--- - - - ---

Tony, the page is "broken"!

--- - - - ---

Brandon,

 The page http://www.elecraft.com/K3/K3_filter_plots.htm is "broken" in
that the plots are no longer displayed.

TNX & 73,
Gary  KI4GGX


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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Fred Townsend]

Al Lorona wrote:

> Here's a dumb question from a person with little thermal engineering 
> knowledge: As these various heat sinks are being compared, does 1° deg C. 
> really matter? 

As Wayne wrote not a dumb question at all but a highly complex one. Again I 
agree with Wayne's answer of 'probably not'. In fact your heatsink will operate 
more effeciently at higher temperatures because radiation effects are 
proportional to the forth order meaning a small change can make a big 
difference. On the other hand Elecraft builds in a huge safety margin and 
monitors and halts if that margin is exceeded.  On the other side one degree is 
one more degree of margin or which of your comfort zone does your wallet reside?
73
Fred, AE6QL

-Original Message-
>From: Al Lorona 
>Sent: Sep 2, 2014 10:19 AM
>To: "elecraft@mailman.qth.net" 
>Subject: Re: [Elecraft] [KX3] A Comparative Performance Assessment (of 
>Aftermarket KX3 Heatsinks)
>
> 
>Here's a dumb question from a person with little thermal engineering 
>knowledge: As these various heat sinks are being compared, does 1° deg C. 
>really matter? 
> 
>Al  W6LX
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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Dennis Griffin]

Hi Gary,

I find it curious that there was no mention in Adrian's report of what surface 
coating or surface finishing process the tested heat sinks had been subjected 
to. Last I knew, Fred is using powder coat on his newly designed higher cost 
heat sink, with the lower cost version having an as machined finish, with no 
further processing. I believe the PAE Kx31 heat sinks are now hard anodized, 
and I don't know how the KB8UHN units are finished. Can you please comment on 
this, since the type of surface finishing can play a role in the efficiency of 
heat transfer of a heat sink? I'm also curious if Fred's lower cost version is 
still the original size, with less radiating surface area than the newer one.

73 de Dennis KD7CAC
Scottsdale, AZ


> Subject: RE: [Elecraft] [KX3] A Comparative Performance Assessment (of
> Aftermarket KX3 Heatsinks)
> 
> P.S.  I deleted several comments from my Reflector post before sending it
> (for the sake of brevity), including ...
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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Gary W. Hvizdak]

On Tue Sep 2 2014 at 13:19:20 EDT, Al Lorona  (W6LX) posted ...

Here's a dumb question ... does 1° deg C. really matter? 
 
--- - - - ---

Al,

On the contrary, you've asked an excellent although slightly ambiguous
question.  Are you referring to the one degree C difference between the top
three heatsinks, or are you referring to the roughly 1 degree C difference
between the factory heatsink and the heatsink that came in last place?

FYI, the purpose of this testing was primarily to determine how the
various offerings compared to one another.  In addition, Adrian didn't want
to unnecessarily overstress his PAs in the process.  Had he chosen higher
power levels, then the separation between each of the candidates would have
been greater.  In fact, it very well might have been possible to break the
tie for second place.

Keep in mind that this testing was particularly challenging due to the
KX3 firmware's 1 degree C displayed temperature resolution.

BTW, I know that the PAs generated 8.5 Watts of waste heat running 5
Watts out on 20 meters, and I used a polynomial approximation to estimate
that they generated 9.3 Watts of waste heat while running 0.5 Watts out on 6
meters!  (No, that's not  a typo!) 

73,
Gary  KI4GGX
webmaster http://www.ve7fmn.ca/

P.S.  Don, Adrian's test report clearly states that he conducted all of his
tests in "still air" and that the ambient temperature remained between a
half degree of 25 degrees C.


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Re: [Elecraft] 4m-Transverter for K3?

[Oliver Dröse]

Hi Martin,

EA7HG offers a K3 internal transverter: http://www.transverters.net/84298715

For external ones there are several choices. Besides Kuhne the HA1YA 
transverters are top-notch (performance like Kuhne but just 1/3 of the 
price). EA7HG has an external one, too. If you want to build your own 
(or buy a kit) google for OZ2M, SP2DMB, DF2FQ, G4DDK, etc.


73, Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 02.09.2014 14:48, schrieb Martin:

Maybe this was discussed before, sorry when i missed it:

Will there be a 4m-Transverter -external or internal -for the K3 ?

In EU there are only a very small number of manufacturers. The Kuhne 
transverters, although top notch, are out of range for many.


There is one from Hungary, but still more expensive than the XV-line.




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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Randy Moore]

Monday (Labor Day) I setup my buddipole in the backyard as a 20 meter
vertical and operated portable for about 3 hours sitting in the shade and
enjoying the 96 degree F temperature in the shade and the high humidity.  I
ran both SSB and data (PSK31) during the time I was outside.  With the
temperature in the shade at 96 degrees, running 10 watts on 20 meters I made
a lot of contacts.  At no time did the radio overheat, or have any
performance issues with the KB8UHN hat sink installed.  I was quite happy
with the operation and plan to repeat the setup on the coast once the
temperatures drop.  I am quite confident that the KB8UHN heat sink will
serve my needs.

I have tested it running JT-65 at 10 watts and may do the mode, but it is
not very exciting.

73

Randy Moore
AI4CO


-Original Message-
From: Gary W. Hvizdak [mailto:gary.hviz...@cfl.rr.com] 
Sent: Monday, September 01, 2014 3:54 PM
To: 'Randy Moore'
Subject: RE: [Elecraft] [KX3] A Comparative Performance Assessment (of
Aftermarket KX3 Heatsinks)

P.S.  I deleted several comments from my Reflector post before sending it
(for the sake of brevity), including ...

1)  Mentioning that the KB8UHN heatsink might have performed slightly better
(versus the factory heatsink) had the tests been run at higher power.
(Essentially higher power would have magnified the difference between each
candidate.)  Adrian probably chose those power levels so he wouldn't
over-stress his radio.

2)  Pointing out that the PAs got hotter running 0.5 Watts on 6 meters, than
they did running 5.0 Watts on 20 meters!

3)  Mentioning that a lower ambient temperature might have magnified the
difference between the heatsinks.  Reference
http://www.ve7fmn.ca/this-is-cool/pdfs/performance_page/theoretical_performa
nce_c.pdf

-Original Message-
From: Randy Moore [mailto:ai...@outlook.com]
Sent: Monday 01 Sep 2014 1229
To: 'Gary W. Hvizdak'; elecraft@mailman.qth.net
Cc: 'Adrian Ryan'; 'Fred'; 'Edouard Lafargue'; matt421...@gmail.com
Subject: RE: [Elecraft] [KX3] A Comparative Performance Assessment (of
Aftermarket KX3 Heatsinks)

Thank you very much for the comparison of the available heat sinks for the
KX3.

I bought the KB8UHN heat sink and I am quite happy with it.  Using his heat
sink I am able to run Digital modes at 10 watts on 20 and 40 meters with no
problems and my radio temperature is lower than the comparison at 5 watts.
I did use the included heat sink compound so perhaps that makes a
difference.

I did some testing on my own using assorted heat sinks from old audio and
video cards and found that almost any heat sink will make a big difference.

Thank you for supporting the Elecraft KX3 with your aftermarket accessories.

Randy Moore
AI4CO




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Re: [Elecraft] K3 filter plots

[N2TK, Tony]

Thanks Gary,
A friend just bought a K3 and was asking about filter recommendations, which
I made. But wanted to show him the filter characteristics.
73,
N2TK, Tony

-Original Message-
From: Gary W. Hvizdak [mailto:gary.hviz...@cfl.rr.com] 
Sent: Tuesday, September 02, 2014 1:26 PM
To: bran...@elecraft.com
Cc: tony@verizon.net; elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3 filter plots

On Tue Sep 2 2014 at 12:35:38 EDT Tony, N2TK posted ...

What happened to the 5-pole and 8-pole filter plots on the Elecraft web
site?

--- - - - ---

Tony, the page is "broken"!

--- - - - ---

Brandon,

The page http://www.elecraft.com/K3/K3_filter_plots.htm is "broken" in
that the plots are no longer displayed.

TNX & 73,
Gary  KI4GGX




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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Don Wilhelm]

Al,

Without knowing the specifications and most recent calibration data for 
the measurement equipment as well as the complete setup info, 
environment info and details of how the procedure was performed, I would 
suggest that 1 degC could be within the range of 'measurement error'.


For example:
If the ambient environment was not precisely controlled, there could be 
as much as a 2 degC variation in the ambient temperature as well.  If 
performed in an air conditioned space, consider the hysteresis in the 
thermostat controlling the AC (if the thermostat is set for 72 degF, it 
may come on when the room temperature reaches 74 degF and turn off when 
the room temperature drops to 70 degF - it all depends on the 
characteristics of the thermostat).


So without that kind of seemingly unrelated details, small variations in 
the measurements can be disregarded.


73,
Don W3FPR

On 9/2/2014 1:19 PM, Al Lorona wrote:
  
Here's a dumb question from a person with little thermal engineering knowledge: As these various heat sinks are being compared, does 1° deg C. really matter?
  
Al  W6LX





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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Wayne Burdick]

Al Lorona wrote:

> Here's a dumb question from a person with little thermal engineering 
> knowledge: As these various heat sinks are being compared, does 1° deg C. 
> really matter? 

Not a dumb question at all. (There are no dumb questions, in fact. Just varying 
degrees of patience in answering them.)

A 1-degree difference might matter if you were trying to eek out every last 
second of operating time before the KX3's firmware drops power from 10-12 watts 
down to 5 watts (or some other metric).

For the vast majority of KX3 users, the factory-provided "slim" heat sink is 
entirely adequate, and an extra degree C isn't really relevant. Of 6000+ radios 
shipped, only a few hundred have felt compelled to add larger heat sinks. 
That's a good thing, since we designed the rig to be compact and lightweight.

73,
Wayne
N6KR

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Re: [Elecraft] K3 filter plots

[Gary W. Hvizdak]

On Tue Sep 2 2014 at 12:35:38 EDT Tony, N2TK posted ...

What happened to the 5-pole and 8-pole filter plots on the Elecraft web
site?

--- - - - ---

Tony, the page is "broken"!

--- - - - ---

Brandon,

The page http://www.elecraft.com/K3/K3_filter_plots.htm is "broken" in
that the plots are no longer displayed.

TNX & 73,
Gary  KI4GGX



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Re: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks)

[Al Lorona]

 
Here's a dumb question from a person with little thermal engineering knowledge: 
As these various heat sinks are being compared, does 1° deg C. really matter? 
 
Al  W6LX
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[Elecraft] K3 filter plots

[N2TK, Tony]

What happened to the 5-pole and 8-pole filter plots on the Elecraft web
site? I can't seem to find them anymore. 

Any ideas where I might look?

Tnx

N2TK, Tony

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[Elecraft] 4m-Transverter for K3?

[Allan G Duncan]

I have been using an Elecraft XV50 transverter converted to 70MHz now for
many years. It was originally used with my K2 and now with my K3. This
combination has won many contests here in the UK. RX sensitivity is good and
strong signal handling seems more than adequate for me. I would not
recommend it for FM use at full rated output, however, as the heatsinking of
the PA module is marginal for that mode.

I had considered making up kits of parts to convert XV50 to 70MHz as it's
quite a simple modification especially with the new PA module that now ships
with the XV50 kit. It takes more time ordering parts from various suppliers
than actually carrying out the modification. The only part that cannot be
obtained is the front panel "XV70" backlit label to replace the original
"XV50" one. There are a few SMD capacitors to change which may put off some
constructors, although I found it straightforward.

I believe EA7HG sells an internal transverter for the K3 although I have not
yet heard one on air. 

There is lots of further reading about 70MHz at http://www.70mhz.org


73

Allan
GM4ZUK



> There has been mention of converting an XV50 transverter to 70 MHz in 
> the past on this reflector.
> I do not believe it is a difficult mod.
> You may want to do a search of the reflector archives.
>
> 73,
> Don W3FPR

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[Elecraft] Vedr: 4m-Transverter for K3?

[Martin Storli - LA8OKA]

I wish Elecraft could offer this as a ready package! 

Martin Storli 
LA8OKA
Oslo, Norway 
 
ARCTICPEAK's Radio pages! 
http://www.arcticpeak.com/radio.htm
 


 Fra: David G4DMP 
Til: Martin  
Kopi: elecraft  
Sendt: Tirsdag, 2. september 2014 15.13
Emne: Re: [Elecraft] 4m-Transverter for K3?
  

No, Martin, there is not an internal 4m transverter for the K3. I
modified the external Elecraft XV50 for 4 metres and it works very well.
If you can obtain an XV50 with the later power output module, it can be
modified.  Here are my details: http://www.g4dmp.co.uk/XV70mods.pdf

73 de David G4DMP

In a recent message, Martin  writes
>
>Will there be a 4m-Transverter -external or internal -for the K3 ?
>
>In EU there are only a very small number of manufacturers. The Kuhne
>transverters, although top notch, are out of range for many.
>
>There is one from Hungary, but still more expensive than the XV-line.

-- 
+ - - - - - - - - - - - - - - - - +
| David M Pratt, Kippax, Leeds.   |
| Website: http://www.g4dmp.co.uk/|



+ - - - - - - - - - - - - - - - - +

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Re: [Elecraft] 4m-Transverter for K3?

[David G4DMP]

No, Martin, there is not an internal 4m transverter for the K3. I
modified the external Elecraft XV50 for 4 metres and it works very well.
If you can obtain an XV50 with the later power output module, it can be
modified.  Here are my details: http://www.g4dmp.co.uk/XV70mods.pdf

73 de David G4DMP

In a recent message, Martin  writes
>
>Will there be a 4m-Transverter -external or internal -for the K3 ?
>
>In EU there are only a very small number of manufacturers. The Kuhne
>transverters, although top notch, are out of range for many.
>
>There is one from Hungary, but still more expensive than the XV-line.

-- 
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

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Re: [Elecraft] [K2] KSB2 Filter alignment question

[Don Wilhelm]

Gareth and all,

Yes, Spectrogram (or other audio spectrum analyzer) is *the* way to set 
up the K2 filters with ease.


A slight variation on the N0SS plots, which were done with the original 
2.1 kHz OP1 filter is to alter the position of the 2.4 kHz width OP1 
filter slightly.
Set markers at 300 Hz and 2600 Hz and move the BFO to position the 
passband between those two markers.


If you align it that way, you will have a suitable filter in FL1 for 
both transmit and receive.  In other words, there is no need to also set 
FL2 to the OP1 filter.


I have aligned many SSB filter sets that way for my customers and have 
never heard a complaint.
I adjust the other 3 filters to be progressively 200 Hz more narrow than 
the prior filter (using Spectrogram to measure the actual width of the 
filter).  I normally adjust FL2 to a measured 2.2 kHz width, FL3 to 2.0 
and FL3 to 1.8 kHz.  On many K2s, the actual filter width is greater 
than width shown on the display.  The low frequency -6dB passband corner 
of the FL2 filter is set at 350 Hz, FL3 at 400 Hz and FL4 at 450 Hz.  
The low frequency end of the passband cannot be cut very much without 
loosing intelligibility, but the high end can be cut considerably to 
eliminate QRM while retaining intelligibility.


73,
Don W3FPR

On 9/2/2014 8:13 AM, Gareth - M5KVK wrote:

K2 serial 03885 fitted with KSB Rev C board.

When I installed the KSB2 board recently, I went through the process of
setting up the BFOs as per the KSB2 manual. However, I just downloaded
Spectrogram and went through N0SS's procedure for setting up the filters.

Most of the adjusted settings were within 2-300Hz of those in the manual
(all on the higher side), but a couple were moved quite a bit. I'm
interested in others' experiences in this area.

The outliers were USB FL2 which needed to be 500Hz higher and USB FL3 which
needed to be 700Hz higher.

The main issue when looking with Spectrogram was that the USB spectrum was
far too bassy when the BFOs were set as per the manual.

Regards




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Re: [Elecraft] 4m-Transverter for K3?

[Don Wilhelm]

There has been mention of converting an XV50 transverter to 70 MHz in 
the past on this reflector.

I do not believe it is a difficult mod.
You may want to do a search of the reflector archives.

73,
Don W3FPR

On 9/2/2014 8:48 AM, Martin wrote:

Maybe this was discussed before, sorry when i missed it:

Will there be a 4m-Transverter -external or internal -for the K3 ?



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Re: [Elecraft] 4m-Transverter for K3?

[XE3/K5ENS via Elecraft]

How about an internal 432mhz for the K3???

Keith



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/4m-Transverter-for-K3-tp7592699p7592702.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] 4m-Transverter for K3?

[Peter Torry]

Martin,

Have a look at the Nacton soon to be renamed Anglian transverter 
http://g4ddk.com/4m%20web%20doc.pdf or the one from 
http://www.qrp-shop.biz/EA7HGXV70K3


There are a number of others such as http://rudius.net/oz2m/70mhz/ but 
at the end of the day the Kuhne module is probably the best one.


73

Peter

G3SMT




On 02/09/2014 12:48, Martin wrote:

Maybe this was discussed before, sorry when i missed it:

Will there be a 4m-Transverter -external or internal -for the K3 ?

In EU there are only a very small number of manufacturers. The Kuhne 
transverters, although top notch, are out of range for many.


There is one from Hungary, but still more expensive than the XV-line.




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Re: [Elecraft] [KX3] Foxhunting with the KX3 2m module

[Dennis Griffin]

Here is the OM that has been offering these adapters for years, with good 
comments from those using them. Stephen would have to advise as to which 
adapter would be physically appropriate and would provide the proper amount of 
pin insertion into the KX3 2M SMA jack. Using such an adaptor, sparing the SMA 
jack from the potential high number of make/break cycles, and a 4 - 6' jumper 
coax, allowing for easy manipulation while aiming the antenna, would be the 
ideal setup. The additional insertion losses and jumper cable attenuation 
shouldn't be a consideration when fox hunting, and might be of benefit if one 
were to accidentally transmit while using this setup.

http://wa8lmf.net/miscinfo/Gulyas_SMA-to-BNC_Adapters.htm

73 de Dennis KD7CAC
Scottsdale, AZ

On Sep 2, 2014, at 5:39 AM, Don Nelson  wrote:

> The suggested attachment to the KX3 is risky because of the stress the mass 
> presents on the SMA connector.
> 
> The same risk exists for BNC antenna attached to SMA connectors on HTs. I 
> mitigated that risk, a bit, on my HT by using an adaptor that has a male SMA 
> connector that has a flat surface that snugs up to the HT body when the 
> connector is attached to the HT. This same adaptor could be used on the KX3.
> 
> Here is an example of such a connector on ebay:
> 
> http://www.ebay.com/itm/1pce-Conversion-Adapter-BNC-female-F-to-SMA-male-M-RF-connector-for-radio-gold-/271590922716?pt=US_Radio_Comm_Coaxial_Cables_Connectors&hash=item3f3c1499dc
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[Elecraft] 4m-Transverter for K3?

[Martin]

Maybe this was discussed before, sorry when i missed it:

Will there be a 4m-Transverter -external or internal -for the K3 ?

In EU there are only a very small number of manufacturers. The Kuhne 
transverters, although top notch, are out of range for many.


There is one from Hungary, but still more expensive than the XV-line.


--

Ohne CW ist es nur CB..

73, Martin DM4iM
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Re: [Elecraft] [KX3] Foxhunting with the KX3 2m module

[Don Nelson]

The suggested attachment to the KX3 is risky because of the stress the 
mass presents on the SMA connector.


The same risk exists for BNC antenna attached to SMA connectors on HTs. 
I mitigated that risk, a bit, on my HT by using an adaptor that has a 
male SMA connector that has a flat surface that snugs up to the HT body 
when the connector is attached to the HT. This same adaptor could be 
used on the KX3.


Here is an example of such a connector on ebay:

http://www.ebay.com/itm/1pce-Conversion-Adapter-BNC-female-F-to-SMA-male-M-RF-connector-for-radio-gold-/271590922716?pt=US_Radio_Comm_Coaxial_Cables_Connectors&hash=item3f3c1499dc

Shop around - I have no idea if this ebay seller is the right choice.

Don, N0YE



On 9/2/2014 6:12 AM, Matt VK2RQ wrote:

I saw the following blog post about someone using the KX3 with 2m transverter 
for fox hunting:
http://www.n4kgl.info/2014/09/the-kx3-2-meter-module-is-handy-for-fox.html

This sounds like a great idea, and would work well with the adjustable 
attenuator mini module, if you put it in a metal box. Not too sure about the 
strain of mounting an antenna directly on the SMA connector though. If the KX3 
had a feature where it would output a tone proportional to signal strength, 
then this might be a good convincer when deciding on the 2m module.

73,
Matt VK2RQ
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Re: [Elecraft] [KX3] Fox hunting with the KX3 2M module

[Dennis Griffin]

Yes, Matt, I cringed when I saw those pics of the attenuator and loop antenna 
mounted directly to the KX3's 2M module SMA jack. I would do that using a solid 
BNC on something like my IC-T7A (very sensitive receiver), IC-W32A, IC-V82 or 
TH-D7A, but that setup using an SMA connection, IMNSHO, should have a jumper 
cable between the SMA jack and the attenuator/antenna assembly.

73 de Dennis KD7CAC
Scottsdale, AZ

On Sep 2, 2014, at 5:12 AM, Matt VK2RQ  wrote:

> I saw the following blog post about someone using the KX3 with 2m transverter 
> for fox hunting:
> http://www.n4kgl.info/2014/09/the-kx3-2-meter-module-is-handy-for-fox.html
> 
> This sounds like a great idea, and would work well with the adjustable 
> attenuator mini module, if you put it in a metal box. Not too sure about the 
> strain of mounting an antenna directly on the SMA connector though. If the 
> KX3 had a feature where it would output a tone proportional to signal 
> strength, then this might be a good convincer when deciding on the 2m module.
> 
> 73,
> Matt VK2RQ
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Re: [Elecraft] [K2] KSB2 Filter alignment question

[Matt VK2RQ]

You did the right thing using spectrogram to align the filters -- the values in 
the manual are really only a rough guide for those who don't have access to 
more advanced alignment methods such as spectrogram.

73,
Matt VK2RQ

> On 2 Sep 2014, at 10:13 pm, Gareth - M5KVK  wrote:
> 
> K2 serial 03885 fitted with KSB Rev C board.
> 
> When I installed the KSB2 board recently, I went through the process of
> setting up the BFOs as per the KSB2 manual. However, I just downloaded
> Spectrogram and went through N0SS's procedure for setting up the filters.
> 
> Most of the adjusted settings were within 2-300Hz of those in the manual
> (all on the higher side), but a couple were moved quite a bit. I'm
> interested in others' experiences in this area.
> 
> The outliers were USB FL2 which needed to be 500Hz higher and USB FL3 which
> needed to be 700Hz higher.
> 
> The main issue when looking with Spectrogram was that the USB spectrum was
> far too bassy when the BFOs were set as per the manual.
> 
> Regards
> 
> Gareth - M5KVK
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[Elecraft] [K2] KSB2 Filter alignment question

[Gareth - M5KVK]

K2 serial 03885 fitted with KSB Rev C board.

When I installed the KSB2 board recently, I went through the process of
setting up the BFOs as per the KSB2 manual. However, I just downloaded
Spectrogram and went through N0SS's procedure for setting up the filters.

Most of the adjusted settings were within 2-300Hz of those in the manual
(all on the higher side), but a couple were moved quite a bit. I'm
interested in others' experiences in this area.

The outliers were USB FL2 which needed to be 500Hz higher and USB FL3 which
needed to be 700Hz higher.

The main issue when looking with Spectrogram was that the USB spectrum was
far too bassy when the BFOs were set as per the manual.

Regards

Gareth - M5KVK
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[Elecraft] [KX3] Foxhunting with the KX3 2m module

[Matt VK2RQ]

I saw the following blog post about someone using the KX3 with 2m transverter 
for fox hunting:
http://www.n4kgl.info/2014/09/the-kx3-2-meter-module-is-handy-for-fox.html

This sounds like a great idea, and would work well with the adjustable 
attenuator mini module, if you put it in a metal box. Not too sure about the 
strain of mounting an antenna directly on the SMA connector though. If the KX3 
had a feature where it would output a tone proportional to signal strength, 
then this might be a good convincer when deciding on the 2m module.

73,
Matt VK2RQ
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Re: [Elecraft] New Elecraft K2/100 #7556 is on the air!

[David G4DMP]

Yes, Bob, the URL of the Elecraft Owners' Database is

http://www.zerobeat.net/qrp/elowners.html

You can search by Callsign, Elecraft equipment, serial number or any
other field on the database. Putting my callsign in will reveal six
items I have registered on there.  I don't know how many people bother
to enter their Elecrafts on the database these days so you may find it
somewhat out of date.

73 de David G4DMP

In a recent message, Bob Myers  writes
>Nice going Michael.
>
>Does anyone remember the location of the list of K2 builders with s/n
>and dates? I can’t seem to find it. Thanks,
>
>Bob W1XT
>Sun City West, AZ

-- 
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

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