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  #11   Report Post  
Old May 1st 04, 03:54 AM
John
 
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"Wes Stewart" wrote in message
...
On Fri, 30 Apr 2004 16:41:06 -0500, "John"
wrote:
|Yes, I do.

I figured you might. I scanned it into pdf, but to get decent quality
the file is huge and I only have dialup service at about 26 kB.
(Where is that BPL [g])

I'll put it on my web site later when I have a couple of hours free if
you want it.

Wes



I see you have already put it there. I have the same type of service, but I
can let it download all night, if necessary. I'm off to get it.

Thank you profusely.

John


  #12   Report Post  
Old May 1st 04, 03:00 PM
John
 
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"Wes Stewart" wrote in message
...
wrote:

I figured you might. I scanned it into pdf, but to get decent quality
the file is huge and I only have dialup service at about 26 kB.
(Where is that BPL [g])

I'll put it on my web site later when I have a couple of hours free if
you want it.

Wes



Wes -

I got it. I read it. It did not occur to me that I must short the load to
get the phase reference (although it should have). The paper clarifies lots
of things for me.

I don't have a line stretcher (I though this was a joke when it was
mentioned on this forum). However, it appears I can do without it if I
recalibrate the phase offset for each change in frequency. I will probably
be mostly interested in single-frequency measurements anyway.

After you mentioned it, I searched the Web for this app note and was
unsuccessful. Thanks ever so much for making it available to me.

73,
John - KD5YI


  #13   Report Post  
Old May 1st 04, 05:14 PM
Wes Stewart
 
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On Sat, 1 May 2004 09:00:57 -0500, "John"
wrote:

|
|"Wes Stewart" wrote in message
.. .
| wrote:
|
| I figured you might. I scanned it into pdf, but to get decent quality
| the file is huge and I only have dialup service at about 26 kB.
| (Where is that BPL [g])
|
| I'll put it on my web site later when I have a couple of hours free if
| you want it.
|
| Wes
|
|
|Wes -
|
|I got it. I read it. It did not occur to me that I must short the load to
|get the phase reference (although it should have). The paper clarifies lots
|of things for me.
|
|I don't have a line stretcher (I though this was a joke when it was
|mentioned on this forum). However, it appears I can do without it if I
|recalibrate the phase offset for each change in frequency. I will probably
|be mostly interested in single-frequency measurements anyway.
|
|After you mentioned it, I searched the Web for this app note and was
|unsuccessful. Thanks ever so much for making it available to me.

No problem, glad you can use it. I have used the technique shown in
figure 11. I happen to have all of that stuff. It is really just a
resistance bridge and could be duplicated for a lot less money. I
have also developed a simple-minded Excel sheet to do the math for the
bridge method. If you're interested,

www.qsl.net/n7ws/8405.xls

73,

Wes
  #14   Report Post  
Old May 1st 04, 06:09 PM
Richard Clark
 
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On Thu, 29 Apr 2004 02:17:12 GMT, "The other John Smith"
wrote:

I presume your source offers a 50 Ohm output Z. There is nothing like
a mismatched source looking at a mismatched load to increase confusion
by the square.


What is the output impedance of an amateur transmitter? I see arguments all
the time about this. And even so, what will be the result if it is not
matched? If there are reflections from the source, it will show up in the
composite forward voltage which will be the reference anyway. Is this not
so?


Hi John,

By virtue of Wes' providing you a copy of AN 77-3 and to further offer
you disclosure on the significant contributors of error, consider:
http://metrologyforum.tm.agilent.com/download.shtml

As part of the suite of calculators of error offered there, you will
find the answer to your question above. The "arguments" that you have
so closely observed are fundamentally forced naivete (much too long in
the tooth to be taken seriously). This is simply the consequence of
armchair debate squirming in the face of experience. ;-)

73's
Richard Clark, KB7QHC
  #15   Report Post  
Old May 1st 04, 06:10 PM
Richard Clark
 
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On Sat, 1 May 2004 09:00:57 -0500, "John"
wrote:
I don't have a line stretcher (I though this was a joke when it was
mentioned on this forum).


Hi John,

Wait till you hear the one about the sliding load....

73's
Richard Clark, KB7QHC


  #16   Report Post  
Old May 2nd 04, 02:15 AM
John
 
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"Wes Stewart" wrote in message
...

|After you mentioned it, I searched the Web for this app note and was
|unsuccessful. Thanks ever so much for making it available to me.

No problem, glad you can use it. I have used the technique shown in
figure 11. I happen to have all of that stuff. It is really just a
resistance bridge and could be duplicated for a lot less money. I
have also developed a simple-minded Excel sheet to do the math for the
bridge method. If you're interested,

www.qsl.net/n7ws/8405.xls

73,

Wes



I got it, Wes. Thanks. I'll play with it sometime tonight, I hope.

John


  #17   Report Post  
Old May 2nd 04, 02:17 AM
John
 
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"Richard Clark" wrote in message
...
On Sat, 1 May 2004 09:00:57 -0500, "John"
wrote:
I don't have a line stretcher (I though this was a joke when it was
mentioned on this forum).


Hi John,

Wait till you hear the one about the sliding load....

73's
Richard Clark, KB7QHC



Well... it sounds funny. Maybe it's the way you put it.

(snicker)



  #18   Report Post  
Old May 3rd 04, 05:01 PM
Steve Nosko
 
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Yikes!

"Wes Stewart" wrote in message
...
On Sat, 1 May 2004 09:00:57 -0500, "John"
wrote:
....[snip...]
|
|I don't have a line stretcher (I though this was a joke when it was
|mentioned on this forum).


Oh my! I figured any jokes I make would be obvious. I used it lately for
setting up a switched antenna TDOA DF system. Really nice tool for such
things.

--
73, Steve N, K,9;d, c. i My email has no u's.


  #19   Report Post  
Old May 3rd 04, 05:09 PM
Steve Nosko
 
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"Wes Stewart" wrote in message
...

[...snip...]
I
have also developed a simple-minded Excel sheet to do the math for the
bridge method. If you're interested,

www.qsl.net/n7ws/8405.xls
73,
Wes


Nice spreadsheet, Wes. I use them for everything. Never used the
ISBLANK...will now.

--
Steve N, K,9;d, c. i My email has no u's.


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