Corrections on Island Pad Capacitance; Zverev and Audio Transformers

[Jack Smith-6]

I've made small corrections to the island pad capacitance computations
to reflect the copper foil thickness data provided by Grahan, KE9H. The
computed and measured island capacitance does not change, but some
intermediate results do. More details at
http://www.cliftonlaboratories.com/Prototyping.htm

I've mentioned the classic book on filters, /Handbook of Filter
Synthesis /by Anatol I. Zverev, but its current cost has been in the
stratosphere. I received an E-mail from Brad, AL4T recently informing me
that a lower cost ($58 at Amazon) paperback edition of Zverev is now
available. If you have any interest in filter design, this book should
be in your home library. Don't be put off by the equations--there's
plenty in there that can be understood with high school math and the
effort of plowing through the more complex bits are very rewarding. I
highly recommend this book. (When I checked early this year, only the
hardback edition was shown, at nearly $300, so a $58 paperback edition
is a huge savings.)

Finally, for those interested in SoftRock receivers, I've added measured
data for a Bourns 600 ohm : 600 ohm isolation transformer,
LM-NP-1001-B1. This can be used reasonably well for 24 KHz purposes and
will work up to 100 KHz if the termination impedance is carefully
selected. More details at
http://www.cliftonlaboratories.com/softrock_lite_6_2.htm.

Jack K8ZOA
www.cliftonlaboratories.com

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[Bruce Bowman]

I haven't looked for this particular title, but I've had good success
with abebooks.com where you can find new or used titles from hundreds of
booksellers world wide. Everything from whodunnits to text books to
signed first editions. You can't just go by price... you need to
understand which edition is being offered and where the seller is
located.

Bruce, NM5B
Santa Fe, NM

----- Original Message -----
From: "Jack Smith" <[hidden email]>
To: "Elecraft Discussion List" <[hidden email]>
Sent: Saturday, July 28, 2007 3:45 PM
Subject: [Elecraft] Corrections on Island Pad Capacitance;Zverev and
Audio Transformers

> I've made small corrections to the island pad capacitance computations
> to reflect the copper foil thickness data provided by Grahan, KE9H.
> The computed and measured island capacitance does not change, but some
> intermediate results do. More details at
> http://www.cliftonlaboratories.com/Prototyping.htm
>
> I've mentioned the classic book on filters, /Handbook of Filter
> Synthesis /by Anatol I. Zverev, but its current cost has been in the
> stratosphere. I received an E-mail from Brad, AL4T recently informing
> me that a lower cost ($58 at Amazon) paperback edition of Zverev is
> now available. If you have any interest in filter design, this book
> should be in your home library. Don't be put off by the
> equations--there's plenty in there that can be understood with high
> school math and the effort of plowing through the more complex bits
> are very rewarding. I highly recommend this book. (When I checked
> early this year, only the hardback edition was shown, at nearly $300,
> so a $58 paperback edition is a huge savings.)
>
> Finally, for those interested in SoftRock receivers, I've added
> measured data for a Bourns 600 ohm : 600 ohm isolation transformer,
> LM-NP-1001-B1. This can be used reasonably well for 24 KHz purposes
> and will work up to 100 KHz if the termination impedance is carefully
> selected. More details at
> http://www.cliftonlaboratories.com/softrock_lite_6_2.htm.
>
> Jack K8ZOA
> www.cliftonlaboratories.com
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>

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