In article L_cUc.26503$TI1.6110@attbi_s52, says...

"Henry Kolesnik" wrote in message
. ..
From Google on k2aop: www2.arrl.org/qst/feedback/2004/10/Feedback1004.pdf

Feedback A couple of errors crept into the K2AOP oscillator schematic in
Technical Correspondence [Figure 1, "A Simple, Well-Behaved Crystal
Oscillator," Sep 2004, p 67]. R1, shown as 22 M?, should be 2.2 M?. R5,
shown as 100 ?, should be 1000 ?. The variable trimmer capacitor (shown as
C4) should be C3 (18 pF). C4 should be a fixed capacitor.


That draftsman has to know where every skeleton is buried within 100 miles
of Newington to hold down that job.

Jeez, you're not kidding. That's outrageous. They may have just drawn
what the author submitted, though, so I'm not sure if it's the
draftsman's fault.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

That draftsman has to know where every skeleton is buried within 100
miles
of Newington to hold down that job.

Jeez, you're not kidding. That's outrageous. They may have just drawn
what the author submitted, though, so I'm not sure if it's the
draftsman's fault.

-- jm

Previous experience says it's the draftsperson. Or the rules he/she has to
follow.

W4ZCB

I do most of my home brewing at VHF/UHF so clean oscillators
are valued.

You want a CLEAN oscillator for UHF and Microwave, use the Butler from
Stephensen in QEX Nov/Dec 1999.Current limited and works every time. I use a
half dozen in the shop as per original, and a slightly modified 5 volt
version is in the N2PK VNA at 150 MHz. THAT'S a low noise oscillator!

W4ZCB

I did say..

* --I'd use a butler or colpits nominally.--*

In that last post.

I'm familiar with the Stephensen design, it's one of a family. Also
Ham Radio magazine of years gone by did several
articles surveying crystal oscilators, that topology Both the QST
Pierce and Stephansen Butler date back to the vacuum days.
I might add I've been around electronics that long too.

So you did. I have had troubles with the Butler many times when using both
tubes and bipolars. Stephensen explained to me why, and I've never built one
of his that didn't work as planned right out of the chute. PSpice may have
helped, but the bipolar/FET was a great advance. I don't quite go back to
spark, but am getting pretty long in the tooth as well.

Regards

W4ZCB

wrote in message
...
On Mon, 16 Aug 2004 16:59:31 GMT, "Harold E. Johnson"
wrote:

I have built it with MPF102s (invert the circuit for correct
polarities). Works as specified.

I realize it will oscillate, what's the phase noise?

W4ZCB

Well havent the ability to measure it accuratly but I have compared it
using a crystal notch filter (see EMRFD) to attenuate the center freq
and it's pretty decent to the limits of the test rig.

I think yo have to have real low noise test equip to measure even a petty
crappy xtal osc.

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

"Harold E. Johnson" wrote in message
news:L_cUc.26503$TI1.6110@attbi_s52...

"Henry Kolesnik" wrote in message
. ..
From Google on k2aop:
www2.arrl.org/qst/feedback/2004/10/Feedback1004.pdf

Feedback A couple of errors crept into the K2AOP oscillator schematic in
Technical Correspondence [Figure 1, "A Simple, Well-Behaved Crystal
Oscillator," Sep 2004, p 67]. R1, shown as 22 M?, should be 2.2 M?. R5,
shown as 100 ?, should be 1000 ?. The variable trimmer capacitor (shown
as
C4) should be C3 (18 pF). C4 should be a fixed capacitor.


That draftsman has to know where every skeleton is buried within 100 miles
of Newington to hold down that job.

W4ZCB

The errors in the schematics AND the articles, including content errors is
rather disturbing. Technical accuracy is hard for the editors to insure, if
they look at all. Hey! We're amateurs after all...
--
Steve N, K,9;d, c. i My email has no u's.

Anyone remember the QStreeT and/or Handbook DDS explanation and working
model mess from the late nineties?
73, Dave, N3HE

"Harold E. Johnson" wrote in message
news:L_cUc.26503$TI1.6110@attbi_s52...

"Henry Kolesnik" wrote in message
. ..
From Google on k2aop:
www2.arrl.org/qst/feedback/2004/10/Feedback1004.pdf

Feedback A couple of errors crept into the K2AOP oscillator schematic in
Technical Correspondence [Figure 1, "A Simple, Well-Behaved Crystal
Oscillator," Sep 2004, p 67]. R1, shown as 22 M?, should be 2.2 M?. R5,
shown as 100 ?, should be 1000 ?. The variable trimmer capacitor (shown
as
C4) should be C3 (18 pF). C4 should be a fixed capacitor.


That draftsman has to know where every skeleton is buried within 100 miles
of Newington to hold down that job.

W4ZCB