Bob Cordell's Power amplifier book

Bob,
Amazon tells me that I should receive my copy on the 28th of September, which happens to be my wife's birthday. Now when can we all expect to receive all of those rare not made anymore Jfets and mosfets you have squirrelled away for us to use in our Bob Cordell amp builds.

Thanks in advance for all of your efforts. Tad
 
Bob,
Amazon tells me that I should receive my copy on the 28th of September, which happens to be my wife's birthday. Now when can we all expect to receive all of those rare not made anymore Jfets and mosfets you have squirrelled away for us to use in our Bob Cordell amp builds.

Thanks in advance for all of your efforts. Tad

Hi Tad,

That's not fair! YOU get the birthday present? I hope you got her something really nice.

Thanks for your kind thoughts. Actually, I have not squirreled away any significant quantity of anything that is not available today. I still have some National NPD5564 dual monolithic JFETs, but I surely would not part with them.

I ordered a couple of books from Amazon back in early August as a test and they just came yesterday!

Cheers,
Bob
 
Hi Bob,
I look forward to reading your book and am sure it will significantly boost my understanding of the principles of audio design.

I'd like to point out that I have also been looking around for a topic that has not been widely discussed ( has it ? ). That would be as SY put it in one thread on this forum : Clipping behaviour and overload recovery ! If you haven't ......maybe in the next edition and available to current purchasers of the current book as a Web download ?😉
Cheers,
Ashok.
 
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Bob,
I got mine in the mail today. I like the easy read so far. Not stuffy or snobbish.
You do realize your email, concerning items in this book, is going to be prodigious.
In the forward you mention some names I have seen here at DIY Audio as well as the forum itself. I find it quite comforting that I am able to converse directly with those so many orders of magnitude ahead of me in this hobby. The layman does not often get this in real life. The internet is a great piece of work. Just think of the questions people would have asked Da Vinci in his day.

Tad
 
Hi Bob,
I look forward to reading your book and am sure it will significantly boost my understanding of the principles of audio design.

I'd like to point out that I have also been looking around for a topic that has not been widely discussed ( has it ? ). That would be as SY put it in one thread on this forum : Clipping behaviour and overload recovery ! If you haven't ......maybe in the next edition and available to current purchasers of the current book as a Web download ?😉
Cheers,
Ashok.

Hi Ashok,

Clipping and overload is indeed an important topic. I cover it mainly in Chapter 17 and also near the end of Chapter 24. Take a look at the various versions of the Table of Contents on my website at CordellAudio.com - Home for a glimpse of how I cover it. I have often believed that otherwise-well-measuring amplifiers sometimes sound different because they misbehave differently. One aspect of "misbehavior" is unclean clipping. I am a big fan of Baker clamps, and they often help keep clipping clean by keeping transistors out of saturation. The best form of clipping is no clipping at all. This is achieved by employing soft clipping circuits ahead of the amplifier to softly clip the signal slightly before the amplifier-proper ever clips. I discuss this in the book and illustrate a circuit that I call the Klever Klipper.

Cheers,
Bob
 
Thanks Bob. I will check the chapters you mentioned. It's been a while since I visited your web site. Shall check that out also.
Would have been great to have the book autographed by you but I can't make it to the RMAF this year. I think I will be able to make it there next year!

Cheers,
Ashok.
 
Bob,
I got mine in the mail today. I like the easy read so far. Not stuffy or snobbish.
You do realize your email, concerning items in this book, is going to be prodigious.
In the forward you mention some names I have seen here at DIY Audio as well as the forum itself. I find it quite comforting that I am able to converse directly with those so many orders of magnitude ahead of me in this hobby. The layman does not often get this in real life. The internet is a great piece of work. Just think of the questions people would have asked Da Vinci in his day.

Tad

Hi Tad,

Thanks for your kind words about the writing style in the book. I hope you find the rest of it that way as well - even the deep material. I've always believed that even deep material should be able to be described in a way that is comfortable and friendly to the reader. I hope I've been able to do that in most parts of the book.

DIYaudio does indeed provide a wonderful forum for discussion among people at all levels of experience in the audio field, and most of the participants in the forum are very generous with their time and patient in explaining things to others. This is truly a great place.

Cheers,
Bob
 
Thanks Bob. I will check the chapters you mentioned. It's been a while since I visited your web site. Shall check that out also.
Would have been great to have the book autographed by you but I can't make it to the RMAF this year. I think I will be able to make it there next year!

Cheers,
Ashok.

Hi Ashok,

By all means check out my website at CordellAudio.com - Home.

My son Jon re-did it for me and I think he did a great job. It really needed a facelift after the neglect it endured during my writing of the book.

Cheers,
Bob
 
Bob,

Do you have a preferred procedure for getting any edits communicated to you?
Direct email? Preferred subject line? etc.

Hi pooge,

Good point! I am very interested in receiving suggestions for edits and heads-up on errors found. Every book has them in every edition, and mine will be no exception.

My editor actually supplied me with "tear-sheets" to mark up with minor stuff that they can sneak into the second printing (different than a second edition), whenever that occurs (when the first printing runs out, which you guys can help make sooner than later). I'm guessing the degree of change is rather limited in a second printing, however.

No matter what, I'll certainly keep a record of all feedback so that I can take that into account when the time comes for a second edition.

Best way is direct email to bob@cordellaudio.com, probably with the subject "edits". I will appreciate feedback.

BTW, I am also considering putting a place on my website where errata can be published. This will be especially useful for blatant errors, since the last thing I want to do is mislead anyone with erroneous information.

Cheers,
Bob
 
Bob,
I am sure the publishers have a mechanism to gauge book sales. I for one would like to know how this, being an educational creation, fairs on the open market. If most of the 100k DIY members get on board that would be huge.
I wonder if it was actually outsourced to China for printing. We actually do so little over here these days. I would love to see the old U.S.A. and major European nations get back into global hardgoods production.
Must get ready for the wife's 62 birthday.

Tad
 
Hi pooge,

Good point! I am very interested in receiving suggestions for edits and heads-up on errors found. Every book has them in every edition, and mine will be no exception.

My editor actually supplied me with "tear-sheets" to mark up with minor stuff that they can sneak into the second printing (different than a second edition), whenever that occurs (when the first printing runs out, which you guys can help make sooner than later). I'm guessing the degree of change is rather limited in a second printing, however.

No matter what, I'll certainly keep a record of all feedback so that I can take that into account when the time comes for a second edition.

See example here:

http://www.outfront.net/tutorials_02/adv_tech/mailto.htm

Best way is direct email to bob@cordellaudio.com, probably with the subject "edits". I will appreciate feedback.

BTW, I am also considering putting a place on my website where errata can be published. This will be especially useful for blatant errors, since the last thing I want to do is mislead anyone with erroneous information.

Cheers,
Bob

Bob,

It would be easy to set up a link in your signature and/or web site with a "mailto" function link with a named Subject such as "Edits" or "Book Edits".
Having a standardized Subject name would help you sort your edit emails easily.

See here for example:
http://www.outfront.net/tutorials_02/adv_tech/mailto.htm
 
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Bob,

It would be easy to set up a link in your signature and/or web site with a "mailto" function link with a named Subject such as "Edits" or "Book Edits".
Having a standardized Subject name would help you sort your edit emails easily.

See here for example:
Using the mailto link

Hi pooge,

Thanks. This looks like a good suggestion. Looks like there is other good web stuff there also. I'll pass it on to my webmaster (my son Jon). For an EE, I personally am pretty clueless about website design 🙂.

Cheers,
Bob