This is the QR scan code for the RF Cafe website. Scan it with your phone!
Update June 2014: RF Cafe has relocated back to Kernersville, North Carolina
(after 6 years away).
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was
to provide me with ready access to commonly needed formulas and reference material while performing my work as an
RF system and circuit design engineer. The Internet was still largely an unknown entity at the time, and not much
was available in the form of WYSIWYG editors; in fact, my early pages were written using Notepad. After a couple years
of adding material to the website, I noticed that the hit counter would sometimes record a hundred or more hits in
a single day, which clued me in to the reality that other people were finding my site useful. E-mails began arriving
with suggestions, corrections, and even a few compliments.
New in April 2008
An RF Cafe Intro Video
New in April 2009
RF Cafe Security Task Force
That was enough to convince me to expand the presence, so I hijacked web space from my kids' AOL area for storing
files, and linked to them from RF Tools. In July of 1999, I purchased the rfcafe.com domain (and later rfcafe.net)
and launched the RF Tools content as "RF Cafe." The RF Cafe name was chosen due to its brevity for typing, its simplicity
for remembering, and, perhaps most importantly, because it hints at my appreciation for a good cup of coffee (starbucks.com
was already taken!). Besides, names like "e-Something" and "Something Cafe" were in vogue at the time.
Please click here to find out about advertising on RF Cafe.
|If you are kind enough to provide a link from your
website to RFCafe.com
and want to use an image or just text, please consider using one of prepared formats presented
here for simplicity. A large selection of commemorative logos are available.
After many years of handling all the webmaster duties myself, the demand increased to the point that I needed assistance
to handle the many
The RF Cafe Empire
additions and revisions that are performed on a daily basis. I have always had a fulltime+ job while running RF Cafe,
so maintenance consumed the evenings and a good part of the weekends. I scan the Internet daily for interesting headlines,
write Kirt's Cogitations, research day in history items, create the crossword puzzles, constantly search for and generate
new content, write the spreadsheets and other software, design advertiser ads, choose good books for display, manage
the overall website format, and everything else that requires a more in-depth engineering knowledge. Finally, in April
of 2007, I left RF Micro Devices (RFMD
, a great company) after more
than five years with them to work at RF Cafe fulltime. It has been seven years now (April 2014), and I truly wonder
how I ever got enough done because even now I spend all day and evening working on the website.
RF Cafe currently enjoys the status of being one of the most highly rated engineering websites
RF Cafe Gear
coffee cup, mouse pad,
Just 50¢ over cost
on the Internet. Typical weekday page views are more than 7,000, and those are honest page hits that don't include
every downloaded image file on the page like many sites report. The attraction for our much-appreciated regular visitors
is the laid-back atmosphere, the extensive collection of resources, and the daily fresh content. Paying advertisers
appreciate the huge amount of exposure to engineers for a ridiculously low price, and nearly instant access to me
for service. I plan to grow this empire to the maximum extent possible ;-)
Thanks for taking the time to read this, and be sure to drop us an e-mail or phone call any time with your suggestions,
comments and questions. Please be sure to visit our advertisers in appreciation for their helping to fund the website.
Oh, and buy stuff too!!!
Dunn & Bradstreet: 005 660 324 DUNS
To the top right is a photo taken from our back porch on April 6, 2011! (click for larger
the bottom right is a view of Canada from our back porch. On a clear day, the water tower of Port Rowan, Canada -
42 miles away - is visible. On a clear night, we can see the navigation hazard light. Photo taken May 11, 2011. RF
Cafe altitude is 897 ft ASL. Lake Erie altitude is 571 ft. ASL. Port Rowan altitude is 602 ft ASL. Our porch is about
4 ft higher than the road, so it is at about 330 ft. above Lake Erie. The
Port Rowan water tower is 170 ft
tall, so the navhaz light is about 201 ft above Lake Erie. A
Line of Sight calculator estimates
a total LOS for these altitudes of 46 miles, which is consistent with my observations. The Canadian shoreline is in
sight from east to west.
** Copyright Notice **
All editorial content and graphics on this site are protected by copyright law and may not be copied without
the express permission of Kirt Blattenberger, which reserves all rights. Permission to use content on this site
is granted on a case-by-case basis. I welcome your request. Please direct your inquiries to
Kirt Blattenberger, owner. I do not intentionally violate anyone's copyright; however, on occasion I might
use a thumbnail image (just large enough to generate interest) that links back to
the owner's website. Uncredited clipart is usually from MS Office, which I own a license to use.
** Acknowledgments **
All trademarks, trade names, copyrights, etc., for entities listed in this production are hereby acknowledged.
Inclusion of such references in this production are provided free of charge as a service to engineers and other
technical persons in search of goods and services providers. It is the responsibility of any vendor that does
not desire to be represented on this Site to provide formal notification for removal of references.
Due to advanced features used in the creation of this web site, Microsoft Internet Explorer v4.0 or later is
required to guarantee proper display of contents. For example, some equations are generated using an
(Overline) character. If you do not see the line over the word
(Overline) in these sentences, then your browser does not support
necessary features. Additionally, the "Symbol" font must be installed on your system. Default font style for this
site is MS Verdana.
Access to and use of this RF Cafe Internet site (the "Site") is provided subject to these terms and conditions.
PLEASE READ THESE TERMS CAREFULLY, BECAUSE USE OF THE SITE CONSTITUTES ACCEPTANCE OF THESE TERMS AND CONDITIONS.
The Site provides a range of information, and although it attempts to provide Information that is useful, I cannot
possibly insure the accuracy of all of the Information at all times, and you should not rely on the information
in situations where its inaccuracy would cause you to suffer any significant loss. THE INFORMATION IS PROVIDED
"AS IS". RF CAFE, KIRT BLATTENBERGER, AND ITS ASSIGNEES MAKE NO REPRESENTATIONS OR WARRANTIES OF ANY KIND CONCERNING
THE ACCURACY, COMPLETENESS OR SUITABILITY OF THE INFORMATION, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. This Site does not sell, resell
or license any of the "Products" linked to or otherwise referenced on this Site, unless otherwise noted, and I
disclaim any responsibility for or liability related to the Products. Any questions, complaints or claims related
to any Product should be directed to the appropriate vendor. The Information is being provided without charge
to the user. Accordingly, RF CAFE, KIRT BLATTENBERGER, AND ITS ASSIGNEES SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES
OR UNDER ANY LEGAL THEORY FOR ANY DIRECT, INDIRECT, PUNITIVE, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES THAT
MAY BE SUFFERED BY YOU OR ANY OTHER USER OF THE SITE IN CONNECTION WITH OR AS A RESULT OF THE INFORMATION OR THE
PRODUCTS REGARDLESS OF HOW SUCH DAMAGES MAY ARISE AND EVEN IF PREVIOUSLY ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
The opinions expressed on this Site are solely those of Kirt Blattenberger, and do not necessarily reflect
those of any persons or companies referenced on or sponsored by RF Cafe (although they should if they do not).
The privacy of visitors to RFCafe.com is important to me. At RFCafe.com, I recognize that privacy of your personal
information is important. Here is information on what types of personal information is received and collected
when you use and visit RFCafe.com, and how your information is safeguard. I never sell or provide your personal
information to third parties.
Cookies and Web Beacons
I do not run any programs that attempt to deploy popups or any other obnoxious unrequested window. RFCafe.com
uses third party advertisements via Google AdSense to help support the site. You can chose to disable or selectively
turn off our cookies or third-party cookies in your browser settings, or by managing preferences in programs such
as Norton Internet Security. However, this can affect how you are able to interact with this site as well as other
websites. This could include the inability to login to services or programs, such as logging into forums or accounts.
In summary, I despise tricks used by other websites to encroach on my privacy and that throw unwelcome content
in my face, so I do not do that to anyone else.