Date   
Re: I wonder if there is much interest in vacuum tube oscilloscopes such as the 500 series

Chuck Harris
 

Looking at the copyrights and acknowledgements, Stan vanity
pressed his book, using Tamara Wade, Specialty Binding in
Washougal, Washington. He owns the copyright for the finished
work.

If I were a betting man (I'm not), I would bet that Tamara Wade
is/was in someway connected with Tektronix's print shop.

If he still has the galleys (proofs), or can get them, he could
POD very easily.


-Chuck Harris

Shirley Dulcey KE1L wrote:

That's the beauty of print on demand. If people buy the book you make
money, though less than with a conventional print run because the cost
per copy is a bit higher. If nobody buys the book you're out next to
no cash, though you did uselessly spend time preparing your book for a
PoD release. If your primary goal is to get your book out into the
world at a reasonable price for readers, it's a good option. That's
especially true for a reissue of an older book because the time spent
writing it is already gone; you're not up against the prospect of
spending a lot of time writing something and then not getting paid for
it.

The two big players in low cost PoD publishing are Lulu.com and
Amazon's Kindle Direct Publishing. (KDP also does ebook publishing, as
you might guess from the name. Amazon's former fully owned company,
CreateSpace, was merged into KDP a couple of years ago.) Both will let
you create books with zero up-front cost, though they also offer
optional services that cost money. (A third company, iUniverse,
started that way but later pivoted into being a more traditional
vanity press, aside from doing its business online.) The zero cost
option ONLY gets you printing; you're on your own for editing,
designing a cover, preparing your book for publication, promotion, and
getting bookstores and event dealers to carry your book. You can sell
your book at their base publishing cost, in which case you make
nothing on sales, or you can set a higher price and receive a portion
of the difference between the base cost and the selling price.

One complication with reprinting old books is that the author may not
own the rights. If the book was published by a conventional publisher,
that company or its successor may own some or all of the future
publication rights. If the company is defunct it can get complicated
to untangle who actually owns the rights to the book now; they could
belong to some person or company that bought pieces of the former
publisher's intellectual property, or they may have never been bought
by anybody and be in legal limbo.

Re: Old Tektronix Books

Daniel Koller
 

Aha!  Bill, you're the culprit!   ;)
I did the same - you got there first.   The $31 "Oscilloscopes" (was $28 something when I looked) was NOT available.  GlassFrogBooks (via Abe's Books) came back and said they did not have the copy and requested $10 more to find another copy.  We will see if they can find it for $38!!   I won't go higher than that because I won't believe they can find a copy.
As for the "Typical circuits book"   There were three, one at $15, one at $17 and one at $19.   I ordered the $17 one.    I hope I get it.
Dennis, yes, what you said is right.   I've noticed that with goods sometimes - There is only one item out there, or was, as some retailer some place, but other aggregator or sale websites pretend to have is at the same price.  Sometimes it's obvious and you can tell who the original retailer is (particularly if the photos are identical).  Sometimes it's not so simple.   Such aggregator websites are infuriating because they provide no new benefit, no new information to anyone.  They are just there to scam and make money for the operator.  
Dan

On Friday, March 29, 2019, 4:55:41 PM EDT, Bill Fenech <wfenech@...> wrote:

Dan,

I purchase both online this AM through AbeBooks:

Oscilloscopes: Selecting and Restoring a Classic  -  $31 plus $4 shipping

Typical Oscilloscope Circuitry. Revised Edition  -  $19.75 including
shipping


Bill  AI6JZ

Re: Old Tektronix Books

John Williams
 

Good sleuthing. If you want a laugh take a look at the price on The Cathode Ray Tube by Peter Keller. If I hadn’t retired years ago I could sell the three books and retire in style. Apparently. Lol

Re: Old Tektronix Books

Bill Fenech
 

Slight revision to my previous email....one book is marked as received and
confirmed while the other has not confirmed yet
(though have been charged for both).

Dan - FYI I ordered both books after I saw your email this morning. :) I
was only partially up to speed on the other thread at the time.

Cheers
Bill AI6JZ

On Fri, Mar 29, 2019 at 2:16 PM Daniel Koller via Groups.Io <kaboomdk=
yahoo.com@groups.io> wrote:

Aha! Bill, you're the culprit! ;)
I did the same - you got there first. The $31 "Oscilloscopes" (was $28
something when I looked) was NOT available. GlassFrogBooks (via Abe's
Books) came back and said they did not have the copy and requested $10 more
to find another copy. We will see if they can find it for $38!! I won't
go higher than that because I won't believe they can find a copy.
As for the "Typical circuits book" There were three, one at $15, one at
$17 and one at $19. I ordered the $17 one. I hope I get it.
Dennis, yes, what you said is right. I've noticed that with goods
sometimes - There is only one item out there, or was, as some retailer some
place, but other aggregator or sale websites pretend to have is at the same
price. Sometimes it's obvious and you can tell who the original retailer
is (particularly if the photos are identical). Sometimes it's not so
simple. Such aggregator websites are infuriating because they provide no
new benefit, no new information to anyone. They are just there to scam and
make money for the operator.
Dan
On Friday, March 29, 2019, 4:55:41 PM EDT, Bill Fenech <
wfenech@...> wrote:

Dan,

I purchase both online this AM through AbeBooks:

Oscilloscopes: Selecting and Restoring a Classic - $31 plus $4 shipping

Typical Oscilloscope Circuitry. Revised Edition - $19.75 including
shipping


Bill AI6JZ






Re: Old Tektronix Books

Adrian
 

I might be a culprit too just got the only copy of “oscilloscopes” I could see on Ebay which from the photo was the same one that was listed on Amazon and a couple of other sellers google found. I already have a copy of Stan’s book

Adrian
Sent from an I-thingy

On 29 Mar 2019, at 21:21, Bill Fenech <wfenech@...> wrote:

Slight revision to my previous email....one book is marked as received and
confirmed while the other has not confirmed yet
(though have been charged for both).

Dan - FYI I ordered both books after I saw your email this morning. :) I
was only partially up to speed on the other thread at the time.

Cheers
Bill AI6JZ

On Fri, Mar 29, 2019 at 2:16 PM Daniel Koller via Groups.Io <kaboomdk=
yahoo.com@groups.io> wrote:

Aha! Bill, you're the culprit! ;)
I did the same - you got there first. The $31 "Oscilloscopes" (was $28
something when I looked) was NOT available. GlassFrogBooks (via Abe's
Books) came back and said they did not have the copy and requested $10 more
to find another copy. We will see if they can find it for $38!! I won't
go higher than that because I won't believe they can find a copy.
As for the "Typical circuits book" There were three, one at $15, one at
$17 and one at $19. I ordered the $17 one. I hope I get it.
Dennis, yes, what you said is right. I've noticed that with goods
sometimes - There is only one item out there, or was, as some retailer some
place, but other aggregator or sale websites pretend to have is at the same
price. Sometimes it's obvious and you can tell who the original retailer
is (particularly if the photos are identical). Sometimes it's not so
simple. Such aggregator websites are infuriating because they provide no
new benefit, no new information to anyone. They are just there to scam and
make money for the operator.
Dan
On Friday, March 29, 2019, 4:55:41 PM EDT, Bill Fenech <
wfenech@...> wrote:

Dan,

I purchase both online this AM through AbeBooks:

Oscilloscopes: Selecting and Restoring a Classic - $31 plus $4 shipping

Typical Oscilloscope Circuitry. Revised Edition - $19.75 including
shipping


Bill AI6JZ







Re: Old Tektronix Books

Daniel Koller
 

YESTERDAY.  PM some time.

TODAY, after a couple of us bought books, and all I did was refresh the screen:


Amazon:  liars, cheaters,... statisticians!!
  Dan
p.s.  Let's see who actually receive the books they ordered.  Three or more of us requested them.   Until one of us actually receives a book, we have to assume there are *none* out there.   Once one of two of us get books, we can then *know* there are none out there!

On Friday, March 29, 2019, 5:39:03 PM EDT, Adrian <Adrian@...> wrote:

I might be a culprit too just got the only copy of “oscilloscopes”  I could see on Ebay which from the photo was the same one that was listed on Amazon and a couple of other sellers google found. I already have a copy of Stan’s book

Adrian
Sent from an I-thingy

On 29 Mar 2019, at 21:21, Bill Fenech <wfenech@...> wrote:

Slight revision to my previous email....one book is marked as received and
confirmed while the other has not confirmed yet
(though have been charged for both).

Dan - FYI I ordered both books after I saw your email this morning.  :)  I
was only partially up to speed on the other thread at the time.

Cheers
Bill  AI6JZ

On Fri, Mar 29, 2019 at 2:16 PM Daniel Koller via Groups.Io <kaboomdk=
yahoo.com@groups.io> wrote:

Aha!  Bill, you're the culprit!  ;)
I did the same - you got there first.  The $31 "Oscilloscopes" (was $28
something when I looked) was NOT available.  GlassFrogBooks (via Abe's
Books) came back and said they did not have the copy and requested $10 more
to find another copy.  We will see if they can find it for $38!!  I won't
go higher than that because I won't believe they can find a copy.
As for the "Typical circuits book"  There were three, one at $15, one at
$17 and one at $19.  I ordered the $17 one.    I hope I get it.
Dennis, yes, what you said is right.  I've noticed that with goods
sometimes - There is only one item out there, or was, as some retailer some
place, but other aggregator or sale websites pretend to have is at the same
price.  Sometimes it's obvious and you can tell who the original retailer
is (particularly if the photos are identical).  Sometimes it's not so
simple.  Such aggregator websites are infuriating because they provide no
new benefit, no new information to anyone.  They are just there to scam and
make money for the operator.
Dan
    On Friday, March 29, 2019, 4:55:41 PM EDT, Bill Fenech <
wfenech@...> wrote:

Dan,

I purchase both online this AM through AbeBooks:

Oscilloscopes: Selecting and Restoring a Classic  -  $31 plus $4 shipping

Typical Oscilloscope Circuitry. Revised Edition  -  $19.75 including
shipping


Bill  AI6JZ







Stan Griffiths - Re: [TekScopes] I wonder if there is much interest in vacuum tube oscilloscopes such as the 500 series

toby@...
 

On 2019-03-29 4:59 PM, Chuck Harris wrote:
Looking at the copyrights and acknowledgements, Stan vanity
pressed his book,

Hate to repeat myself but I'm worried far less about the book, which is
certain to survive, in print, and somebody will soon enough digitise it;
and more about his 1000 scopes and everything else he's collected.

Somebody should probably try to find out if he has made provision for
it. Donation to TEKmuseum? Do they even have space or funds for transport?

--Toby

Re: 11801 question

Albert Otten
 

Hi Reg,

I did similar with a CSA803A. This scope has the slower Calibrator, about 120 ps rise time.
First I tested an SD-22 with the cal signal. 20 ps/div and 10 mV/div, which gives a reasonable steep mid part of the trace. About the 50% point centered at the grids center. During more than half an hour from startup I could not detect any shift in the trace.
Next I followed your splitter setup, with an SD-20 and an SD-26. In Enhanced Accuracy I set the SD-20 as delay reference and had the SD-26 delay calibrated to this. Displayed 20 ps/div and 5 mV/div. Made the mid region of the traces coincide by a small fine adjustment of Vertical Position of one of the traces. Again I saw no systematic shift of one trace w.r.t. the other. However there 2 occasions (which I noticed) where there was a short duration shift (more or less jumping) of one of the traces over 2-3 ps. That could jst as well be a shift vertically of course. I attributed this to a not firm enough cable connection somewhere since the trace returned nicely to the proper position. Not sure though.
Altogether I can't share your "pessimism" about the performance.

Albert

On Thu, Mar 28, 2019 at 12:52 AM, Reginald Beardsley wrote:


I've got the unit running with a pair of SD-22s fed by a 2 port splitter from
the calibrator into ports 5 & 7. I was finally able to figure out how to
manually adjust the skew so the two traces overlaid. The cables are about 1/2
mm different lengths

I'm seeing the displacement between the two traces vary from 0 to about 10 ps
over the course of a few minutes. Is this normal or is there a fault? I've
read the user manual once, but it's not great. Certainly no match for a 465
or 485 manual.

Does anyone know why this is happening? I've got the internal clock output
connected to an HP 8356A and I can see the period varying. I don't have the
8356A connected to a GPSDO at the moment, but it has the OXCO option and is
very stable.

Is there any reason to think that replacing the 200 MHz master oscillator with
one of Leo Bodnar's GPSDOs would eliminate the interchannel drift?

I discovered this shortly after making an offer for four SD-26 heads. My
intended use is to measure actual FPGA word skew of a DSP stream, so this
would be a serious problem.

Thanks,
Reg

Re: Tek transformer 120-0866-02

Jerry
 

I guess there isn't a PM on this board. You can send an email to clist at handler dot com. But take the 'd' out of handler. Maybe that will keep the skimmers at bay.

Jerry

Tek 11302 wanted for an HP 8568 trade

Jerry
 

I have a burning need for a Tek 11302. I have one, played around with it quite a bit but was never able to figure out what is wrong with it. The basic problem was that every time I booted it up, I had to tune the display as it was out of focus. The focus system wouldn't work enough and I had to mess with the trim pots but even then it wouldn't stick. I have the calibration software and messed around with it but you need a lot of special modules to calibrate the scope. I've been thinking lately that it probably has an NVRam or something that is bad or a battery, but it's only been about 9 months since I took a crack at it and I'm sure I looked for a battery as well as an NVRam back then. My memory just isn't there anymore. I also checked all the voltages, caps, etc, and just never got anywhere. For a while it seemed like I was making progress but it just wouldn't trace correctly (in addition to the focus). So once I got it somewhat in focus, the signal trace seemed to not overlay on subsequent traces so I had a fatter trace horizontally than expected.

Anyway, I have an 8568A that was upgraded to a B. I think they upgraded it as an option at the factory if I remember correctly. It has the 75ohm BNC connector as well as the standard 50Ohm. I had been thinking about keeping it just for the 75 ohm connector. The display is serviceable and the unit works well overall. It has all the cables and I have the interposer I think that would connect to the HP 85585A preselector. I have an 85685A preselector on my other 8568B. I believe it was stored in a closet for a very long time. I remember it being very clean inside, much more than my other 8568B and the calibration constants are better as well. I bought it about 2yrs ago as a backup to my 8568B but since I also have an 8566, I figure it would be a good trade for a working 11302 if someone has one. I want an analog scope as I think they are easier to view modulation envelopes on and I also have a good selection of modules for one already.

So, if you are in the SF Bay Area and would like to trade a working 11302 scope for a pretty decent 8568B (labeled A but it is a B) Spectrum Analyzer, please drop a note to clist at handler dot com but take the 'd' out of handler so it becomes hanler. I get so much spam as it is. I'm not interested in any other trades for the analyzer (possible 11301) as I have quite a few scopes. I somehow fell in love with the 11302 I have and just wish I was able to get it working.

Thanks,

Jerry

Re: I wonder if there is much interest in vacuum tube oscilloscopes such as the 500 series

 

At his age he isn't interested.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Chuck Harris
Sent: Friday, March 29, 2019 2:00 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] I wonder if there is much interest in vacuum
tube oscilloscopes such as the 500 series

Looking at the copyrights and acknowledgements, Stan vanity pressed
his book, using Tamara Wade, Specialty Binding in Washougal,
Washington. He owns the copyright for the finished work.

If I were a betting man (I'm not), I would bet that Tamara Wade is/was
in someway connected with Tektronix's print shop.

If he still has the galleys (proofs), or can get them, he could POD
very easily.


-Chuck Harris

Shirley Dulcey KE1L wrote:
That's the beauty of print on demand. If people buy the book you
make
money, though less than with a conventional print run because the
cost
per copy is a bit higher. If nobody buys the book you're out next to
no cash, though you did uselessly spend time preparing your book for
a
PoD release. If your primary goal is to get your book out into the
world at a reasonable price for readers, it's a good option. That's
especially true for a reissue of an older book because the time
spent
writing it is already gone; you're not up against the prospect of
spending a lot of time writing something and then not getting paid
for
it.

The two big players in low cost PoD publishing are Lulu.com and
Amazon's Kindle Direct Publishing. (KDP also does ebook publishing,
as
you might guess from the name. Amazon's former fully owned company,
CreateSpace, was merged into KDP a couple of years ago.) Both will
let
you create books with zero up-front cost, though they also offer
optional services that cost money. (A third company, iUniverse,
started that way but later pivoted into being a more traditional
vanity press, aside from doing its business online.) The zero cost
option ONLY gets you printing; you're on your own for editing,
designing a cover, preparing your book for publication, promotion,
and
getting bookstores and event dealers to carry your book. You can
sell
your book at their base publishing cost, in which case you make
nothing on sales, or you can set a higher price and receive a
portion
of the difference between the base cost and the selling price.

One complication with reprinting old books is that the author may
not
own the rights. If the book was published by a conventional
publisher,
that company or its successor may own some or all of the future
publication rights. If the company is defunct it can get complicated
to untangle who actually owns the rights to the book now; they could
belong to some person or company that bought pieces of the former
publisher's intellectual property, or they may have never been
bought
by anybody and be in legal limbo.


--
Dennis Tillman W7PF
TekScopes Moderator

Re: 11801 question

Reginald Beardsley
 

Albert,

I've got the splitter setup running using two ports on a single SD-22. The delay between the traces is very stable, but relative to on screen cursors it moves around by 1-2 ps. Leo Bodnar commented he thought the low frequency shifting was due to avalanche operation in the heads.

I'm using split cursors on the first peak of the step, but I get similar results if I pick a point midway up the edge. However, I'm using the 5 ps/div range.and 100 fs cursor steps. Using a point midway on the edge seems to let me measure the delay to 200-300 fs with smoothing and 32 point averaging turned on.

This is really just gratuitous playing with a new toy that fairly well blows my mind. I bought four SD-26 heads with 2017 cal dates on eBay for $200 each. When they arrive it will get very interesting as I have an 8 port splitter.

But that requires 8 length matched cables. I'd like to get a crimper for RG402 SMA and 2.4 mm connectors but am having a hard time finding one.

The 11801 FW is incredibly buggy, but when it's working properly it's an awesome instrument. Now I just need an SD-24 and an SD-32 at sensible prices.

Once I figure out how to get machine readable data off this beast I'll be able to do some really cool stuff. At least after a week or two of math and physics ;-)

Reg

Re: 11801 question

Jim Ford
 

Hi, Reg.I think you want 2.92 mm connectors.  2.4 mm connectors will not mate with SMAs.  SMA, 3.5 mm, and 2.92 mm are all mechanically compatible. I understand that 2.4 mm and 1.85 mm connectors will intermate but not with SMA and the like. Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: "Reginald Beardsley via Groups.Io" <pulaskite=yahoo.com@groups.io> Date: 3/29/19 4:51 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] 11801 question Albert,I've got the splitter setup running using two ports on a single SD-22.  The delay between the traces is very stable, but relative to on screen cursors it moves around by 1-2 ps.  Leo Bodnar commented he thought the low frequency shifting was due to avalanche operation in the heads.I'm using split cursors on the first peak of the step, but I get similar results if I pick a point midway up the edge.  However, I'm using the 5 ps/div range.and 100 fs cursor steps.  Using a point midway on the edge seems to let me measure the delay to 200-300 fs with smoothing and 32 point averaging turned on.This is really just gratuitous playing with a new toy that fairly well blows my mind.  I bought four SD-26 heads with 2017 cal dates on eBay for $200 each.  When they arrive it will get very interesting as I have an 8 port splitter.  But that requires  8 length matched cables.  I'd like to get a crimper for RG402 SMA and 2.4 mm connectors but am having a hard time finding one.The 11801 FW is incredibly buggy, but when it's working properly it's an awesome instrument.  Now I just need an SD-24 and an SD-32 at sensible prices.Once I figure out how to get machine readable data off this beast I'll be able to do some really cool stuff.  At least after a week or two of math and physics ;-)Reg

Re: 11801 question (+GPSDO vs OXCO)

Reginald Beardsley
 

Jim,

The SD-22, 24 & 26 use 3.5 mm connectors. The SD-30 & 32 use 2.4 mm connectors. Having been infected with a severe case of "Test Equipment Acquisition" syndrome, I'm trying to cope as best I can. I'm also trying to avoid doing something stupid. I'm playing with things I never even dreamed I could have. And measuring the air gap in an SMA to 3.5 mm connection completely blows my mind!

I'm seeing a slow, persistent 5 ps variation in trace timing even after running for hours. The 11801 uses a 200 MHz OCXO. Even if it is good to 1e-8, 5 ps is 2e-11. But the scanty service data make it hard to know how the horizontal sweep clock is being generated.

Has anyone replaced the OCXO with a GPDSO. Leo Bodnar is of the opinion that the periodic drift is the sampling head.

I plan to test that tomorrow by locking my LeCroy DDA-125 to a 10 MHz reference and then comparing the OCXO output to a 200 MHz signal from the other port on Leo's GPSDO. At least if I can figure out the correct settings for Leo's dual GPSDO for 200 MHz output.

Have Fun!
Reg

Re: 11801 question (+GPSDO vs OXCO)

 

Hi Reginald,

There are sophisticated ways to increase the time resolution of timebases which I first discovered while reading the Tek DC5010 service manual. It was many years ago so I no longer remember the details, but what I do remember is thinking at the time that it was an electronic equivalent to how a Vernier Caliper works to get an additional digit of resolution out of a measurement scale.

It is unfortunate that Tek no longer provides technical details and a detailed Theory of Operation the way they once did. I always wonder if this was done in a vain attempt to turn a profit for the support their manuals used to provide because they were losing money, or if this was a decision that backfired on them and caused them to lose even more money that they might have otherwise.

Either way it was coincident with Tek beginning a deep slide they never recovered from.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Reginald Beardsley via Groups.Io
Sent: Friday, March 29, 2019 6:13 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] 11801 question (+GPSDO vs OXCO)

Jim,

The SD-22, 24 & 26 use 3.5 mm connectors. The SD-30 & 32 use 2.4 mm
connectors. Having been infected with a severe case of "Test
Equipment Acquisition" syndrome, I'm trying to cope as best I can.
I'm also trying to avoid doing something stupid. I'm playing with
things I never even dreamed I could have. And measuring the air gap
in an SMA to 3.5 mm connection completely blows my mind!

I'm seeing a slow, persistent 5 ps variation in trace timing even
after running for hours. The 11801 uses a 200 MHz OCXO. Even if it
is good to 1e-8, 5 ps is 2e-11. But the scanty service data make it
hard to know how the horizontal sweep clock is being generated.

Has anyone replaced the OCXO with a GPDSO. Leo Bodnar is of the
opinion that the periodic drift is the sampling head.

I plan to test that tomorrow by locking my LeCroy DDA-125 to a 10 MHz
reference and then comparing the OCXO output to a 200 MHz signal from
the other port on Leo's GPSDO. At least if I can figure out the
correct settings for Leo's dual GPSDO for 200 MHz output.

Have Fun!
Reg



--
Dennis Tillman W7PF
TekScopes Moderator

Re: I wonder if there is much interest in vacuum tube oscilloscopes such as the 500 series

Harvey White
 

On Fri, 29 Mar 2019 16:33:21 -0400, you wrote:

You can pay for iUniverse to do the cover design, but as a friend of
mine found out, it isn't yours at all. They won't release the artwork
to you, even though you paid for it.

Be VERY careful with vanity publishers and get a lawyer to read the
contract, one who is familiar with the publishing world. You may have
signed over the rights to the book to get it published.

What iUniverse may have copyrighted is the particular expression of
that book. Not the contents, but the "look and feel"; likely such
things as cover, type font, chapter headings, etc. You still own the
words, but unless you buy the books from them at their price, they
won't give you the completed project. You'll have to do that over
again, and in a way that doesn't dupilicate their work that you paid
for, but don't own.

Above based on the experience of a friend who had an iUniverse book
published.

There are, I think, print houses that are simply that, they print.
They don't edit, they don't market, and all they do is print and
produce copies (note that this is for paper copies and not necessarily
electronic copies.

If you're going to write something Tek related (or otherwise), there
are some landmines out there that bear careful consideration.

Harvey


That's the beauty of print on demand. If people buy the book you make
money, though less than with a conventional print run because the cost
per copy is a bit higher. If nobody buys the book you're out next to
no cash, though you did uselessly spend time preparing your book for a
PoD release. If your primary goal is to get your book out into the
world at a reasonable price for readers, it's a good option. That's
especially true for a reissue of an older book because the time spent
writing it is already gone; you're not up against the prospect of
spending a lot of time writing something and then not getting paid for
it.

The two big players in low cost PoD publishing are Lulu.com and
Amazon's Kindle Direct Publishing. (KDP also does ebook publishing, as
you might guess from the name. Amazon's former fully owned company,
CreateSpace, was merged into KDP a couple of years ago.) Both will let
you create books with zero up-front cost, though they also offer
optional services that cost money. (A third company, iUniverse,
started that way but later pivoted into being a more traditional
vanity press, aside from doing its business online.) The zero cost
option ONLY gets you printing; you're on your own for editing,
designing a cover, preparing your book for publication, promotion, and
getting bookstores and event dealers to carry your book. You can sell
your book at their base publishing cost, in which case you make
nothing on sales, or you can set a higher price and receive a portion
of the difference between the base cost and the selling price.

One complication with reprinting old books is that the author may not
own the rights. If the book was published by a conventional publisher,
that company or its successor may own some or all of the future
publication rights. If the company is defunct it can get complicated
to untangle who actually owns the rights to the book now; they could
belong to some person or company that bought pieces of the former
publisher's intellectual property, or they may have never been bought
by anybody and be in legal limbo.

On Fri, Mar 29, 2019 at 3:56 PM Dennis Tillman W7PF <@Dennis_Tillman_W7PF> wrote:

Hi Dave,
Stan brings up the issue of the outrageous prices used book sellers are asking for 2nd hand copies of his book whenever someone makes the mistake of asking if he has any copies left. He is stuck in a catch 22 situation. He would love to reprint it to get even with the used book stores but it took him over 10 years to sell the first printing. The last time I asked him about it he was resigned to the situation and not interested in doing anything about it.

The sad reality today is that it doesn't pay to print a book these days when someone is virtually certain to rip it off and scan it overnight. I sympathize since I often thought about writing a book on the 7000 Series.

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Dave Seiter
Sent: Friday, March 29, 2019 9:42 AM
To: TekScopes@groups.io
Subject: Re: [TekScopes] I wonder if there is much interest in vacuum
tube oscilloscopes such as the 500 series

Thanks, Dennis-
That was my understanding as well, which was why I was surprised
regarding the misconception that he was publishing his book again.
-Dave
On Friday, March 29, 2019, 7:45:48 AM PDT, Dennis Tillman W7PF
<@Dennis_Tillman_W7PF> wrote:

Hi Dave,
Stan is old. Stan has survived 2 or 3 bouts with cancer, a stroke, and
the recent loss of Pat, his spouse. So he doesn't have the energy he
used to. He does come to swapmeets where he sets up a table like he
always did. I visited him a few times last summer and fall. He is
getting frail but we went into his ham shack and puttered around for a
while looking for some things Pete Lancashire wanted.

Dennis Tillman W7PF

-----Original Message-----
From: Dave Seiter
Sent: Friday, March 29, 2019 1:33 AM

I haven't heard about Stan in a long time; he used to post quite a
lot. I think he had a few webcams, but they went dark long ago.
-Dave



--
Dennis Tillman W7PF
TekScopes Moderator





--
Dennis Tillman W7PF
TekScopes Moderator



2236 power supply

Brendan
 

My wife found a 2236 for $8 and brought it home. B delay did not work and the 30V rail had 60mV+ ripple on it so I changed caps and now the ripple is under control and B delay works. My question is, there is quite a bit of heat being generated from the heat sink inside the power supply cage that Q947,Q946 and CR947 is attached and in-turn attached to the case. I don't really know how hot this is supposed to get. Also the first digit of the VFD display is dim, it is still readable but noticeably dimmer than the others. Is that just an example of the VFD aging?
Thanks for reading.

Brendan

Re: 11801 question (+GPSDO vs OXCO)

Reginald Beardsley
 

I think there were two factors, an increasing dominance of marketing and accounting.

Sadly, I think Keysight and Rohde & Schwarz are now afflicted by similar problems. R&S is selling beta units for $20K. It's outrageous. If I were signing purchase approvals, I'd be up close and personal over the RTM3K. For undisclosed legal reasons the K15 FFT option is not available in NA. So the FFT on a $20K instrument is on a par with a <$400 Rigol.

I spent my career in reflection seismology. EE DSP is trivial by comparison. So the incredibly bad FFTs on COTS DSOs blow my mind.

Reg

Re: 11801 question (+GPSDO vs OXCO)

Jim Ford
 

Ah, Reg, that explains it. But tekwiki says the 40 GHz SD-30 has a 2.92
mm input connector, while the 50 GHz SD-32 has a 2.4 mm input connector
but comes with a 2.4 mm to 2.92 mm adaptor (good luck getting that with
a used SD-32!). Best deal on adaptors and such I know of, if you want
to buy new, is Mini-Circuits; I bought some SMA to 3.5 mm adaptors for
work for about 1/3 the price of equivalents from those crooks at
Pasternack! I haven't played with an 11000 series scope (CSA803A IIRC)
for at least 25 years, but they are amazing. Before that, I had an HP
54120 20 GHz scope. Not too much difference between the Tek and the HP,
kind of like driving a Cadillac or a Lincoln.

BTW, I bought the Leo Bodnar 2-output GPSDO a month or two ago. Works
great! I first hung the active antenna out my garage window and put HP
8494H and 8495H step attenuators inline to determine the additional
cable loss it could tolerate. I found I had to up the attenuation to 40
to 60 dB(!) before it dropped out. But to get it to resync, I had to go
back to 12 dB or so. I mounted the antenna on a south-facing window
ledge and ran RG-316 cable from there through the rafters down to my
workbench. I need to look at the software to see how many times, if
any, it has dropped out. Leo's software keeps track of that. I use it
as an external 10 MHz frequency reference for my HP 8566A spectrum
analyzer and 5343A frequency counter. I've used the latter to check a
10 MHz OCXO I got out of a modulation analyzer (also made by HP, BTW).
Yep, I can see the OCXO start out from power-up many Hz low, rise in
frequency, overshoot, and settle out not too far off from the GPSDO.

I figure Leo's GPSDO is the least expensive (about $200 total shipped
from the UK to California) way to tap into the great atomic clocks in
the sky, short of rolling your own. No way do I have the time to do
that, as much fun as it would be. At least $200 of time and hassle to
do so. I got the 2-output version because I plan to buy a SDRkits VNWA
(about $700 for the top of the line kit with the Rosenberger 12 GHz cal
kit! The VNWA only works to 1.3 GHz, but what the heck?!) in the near
future, and they recommend the Leo Bodnar GPSDO to provide the 24 MHz
(why such an odd frequency?) reference for it. The other output will
stay at 10 MHz and run to a distribution amp (on it's way from China -
$73 with an eBay 15% off coupon!) to clock the spec an, freq counter,
and future test equipment yet to be purchased, such as an HP 8510
network analyzer my buddy will sell to me for <$2k, synthesized
sweeper(s) and function generator(s), 7854 sampling clock (I have the
7B87 plug-in already), 12-digit lower frequency counter, etc. I haven't
used the GPSDO for any time-domain work yet, but it's just a matter of
time (no pun intended!).

Good luck with the 11801A. I'd hesitate to get back into the 11000
series because no way is it as repairable as my 7000 and 5000 series
scopes. Just like my TLA711 logic analyzer that needed a battery
backup. I botched the job, and now it's a very large paperweight!
Someday I'll jump back into that monster, perhaps with a schematic if
somebody on TekScopes knows where to get one. Someday.

Jim F

------ Original Message ------
From: "Reginald Beardsley via Groups.Io" <pulaskite=yahoo.com@groups.io>
To: TekScopes@groups.io
Sent: 3/29/2019 6:13:28 PM
Subject: Re: [TekScopes] 11801 question (+GPSDO vs OXCO)

Jim,

The SD-22, 24 & 26 use 3.5 mm connectors. The SD-30 & 32 use 2.4 mm connectors. Having been infected with a severe case of "Test Equipment Acquisition" syndrome, I'm trying to cope as best I can. I'm also trying to avoid doing something stupid. I'm playing with things I never even dreamed I could have. And measuring the air gap in an SMA to 3.5 mm connection completely blows my mind!

I'm seeing a slow, persistent 5 ps variation in trace timing even after running for hours. The 11801 uses a 200 MHz OCXO. Even if it is good to 1e-8, 5 ps is 2e-11. But the scanty service data make it hard to know how the horizontal sweep clock is being generated.

Has anyone replaced the OCXO with a GPDSO. Leo Bodnar is of the opinion that the periodic drift is the sampling head.

I plan to test that tomorrow by locking my LeCroy DDA-125 to a 10 MHz reference and then comparing the OCXO output to a 200 MHz signal from the other port on Leo's GPSDO. At least if I can figure out the correct settings for Leo's dual GPSDO for 200 MHz output.

Have Fun!
Reg



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Re: 11801 question

Egge Siert
 

Hi to All,

I assume the Time Base Cal Mode is set on High Precision (Enhanced Accuracy Menu). Initialize gives always the Fast Option and (very anoying) restores Intensity to its 60% Default Value.

Greetings,

Egge Siert