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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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DC-70 GHz RF Cables - RF Cafe

Kirt's Cogitations™ #255

Websites - Wayback™ When

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Websites - Wayback™ When

It is interesting to see how familiar websites have evolved over the years. If you began using the Internet when I did back in the early 1990s, you remember the 4800 baud dialup connections and RF Cafe - NCSA Mosaicwatching the little globe on the Mosaic browser spin round and round while waiting for a website to appear. Your anticipation with each new website was a mixture of emotions - willing to suffer the long download times for the treat of seeing cool looking graphics (VGA quality in 256 colors if you were lucky), but being somewhat relieved by all text in order to have a reasonable page load time. Still, it was a big improvement over dialing into local bulletin board services, using a copy of Kermit in hopes of finding a useful file. CompuServe and AOL made things a bit better for the layman... for a while.

RF Cafe - Vector Video StandardsPage content has greatly increased over time for a number of reasons, mainly due to larger display sizes, faster connections, and the importance of conveying as much relevant information as possible on a single page. As recently as the year 2000, standard computer display screen resolution was still somewhere around 800 x 600 pixels (today it is 1024 x 768). Also as of 2000, most home users had a dialup connection with speeds in the 56k baud range, although actually getting a connection anywhere near 56k baud was rare. Even wireless portable devices of today are realizing data transfer speeds better than what we had ten years ago, so tolerating loading of modest size pages is fairly easy. Finally, as the Internet became an increasingly important venue for conducting business, gathering information and, more recently, personal relationships (sigh!), web page content increased in hopes of wowing and capturing the interest of visitors, thereby having them realize that yours is the best page they have ever found and is worth bookmarking for frequent returns.

In the early days of the Internet, conscientious web designers attempted to use minimal graphics and rely on thoughtful page layout using HTML formatting to place text and tables in strategic areas to give the illusion of a graphical page without the bandwidth burden. Unbelievably, there were websites that consisted of a single large graphic that contained all the pictures and text; they took forever to load and presented you with a blank screen until all the bits had transferred. Overly wasteful Flash type entry screens are modern day equivalents of that. Many of us studied reports on Web user likes and dislikes for site features, and attempted to accommodate those wishes so as to maximize the visitor's positive impression.

RF Cafe - Google PageRank DiagramAs time went by and broadband connections sped up, it became possible to integrate a larger amount of graphics and text to present more information to the visitor without the time penalty. Search engine optimization (SEO) now dominates web page design philosophy more than anything else since it can profoundly affect the order in which pages are returned during searches. While page ranking algorithms (PageRank) are very complex, the most highly weighted factor is the number of websites that link back to your website, although existing traffic to the page is also a strong contributor.

The Wayback™ Machine, provided by the website Archive.org, captures and stores snapshots of web pages over time, so you can go there, enter the website address of interest, and probably discover what the website looked like many years ago. It contains almost 2 petabytes of data and is currently growing at a rate of 20 terabytes per month. "This eclipses the amount of text contained in the world's largest libraries, including the Library of Congress." Records begin around 1996.

RF Cafe Kirt's Cogitation - Mr. Peabody's Wayback MachineFor those how are not familiar with the concept, the Wayback Machine was first a feature of a cartoon from back in the 1960s. It was used by Mr. Peabody (a talking dog) as part of his "Peabody's Improbable History" program where he and his trusty boy companion, Sherman (no, he doesn't bark), travel back in time to explore an inane version of bygone world and U.S. events. It was corny.

Archival websites like Archive.org, Google, and others, are used quite often by law enforcement and legal researchers to gather evidence for trials. Recent events in U.S. politics have exposed situations where websites would pull down information after a public outcry had challenged a person or organization for their statements and/or policies. People are learning that in this Information Age, everything they say can and will be used against them, even if they thought it was only to be seen/heard by a privileged few. Even employers are searching archives of web pages in their vetting of potential employees. You have been warned.

I decided to take a look at what the websites of RF Cafe's advertisers looked like in the days of yore. Most had at least one screen shot in the archives. All screen captures are done in the same browser window size (just wide enough to enclose the RF Cafe screen), and then proportionally resized to a common height, so the change in page width is apparent. Some web pages were (and still are) set up to automatically fill the available browser width, like RFMD's, so a width comparison is not possible. They are in random order below, so you might want to do a Crtl+F to search for a company name on the screen.

In some cases the company is a conglomeration of multiple other formerly independent companies, like with Spectrum Microwave which includes the former Salisbury Engineering, Q-Bit, Amplifonix, and others. With those, I tried to find examples of the former company's web pages. Also, for some reason the Wayback™ Machine does not always capture the graphic images associated with the page, so in the place of the intended images are the white placeholders and the annoying little red "x." Because of that, I do not always have the earliest available screen shot here, but instead used the most complete page available. Some websites are so new that the Wayback™ Machine has not found them yet.

You can see in the first example that RF Cafe has changed just a little since its inception in 1999. It was originally a step up from my RFTools website on the AOL personal homepage system. RFTools.com was not available, and the [Something]Cafe.com type names were popular at the time, so RFCafe.com was born. It has since grown to be a major player in the RF engineering web space. Because of dedicated visitors (like you), my many advertisers have provided the opportunity for me to run RF Cafe on a full-time basis. Thanks to them and to you.

Let me know if you would like to have your company's website added to the list.

 

RF Cafe - Wayback™ Machine website archive: click to view full-size RF Cafe

RF Cafe - 1999

RF Cafe - Click to view full-size current RF Cafe

RF Cafe - 2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Anatech Electronics

Anatech Electronics

AMCrf

2004

RF Cafe - Click to view full-size current Anatech Electronics

Anatech Electronics

AMCrf

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size GigaLane

GigaLane

2002

RF Cafe - Click to view full-size current GigaLane

GigaLane

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Stealth Microwave

Stealth Microwave

2004

RF Cafe - Click to view full-size current Stealth Microwave

Stealth Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size RFMD

RF Micro Devices

1997

RF Cafe - Click to view full-size current RFMD

RF Micro Devices

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Narda Microwave East

Narda Microwave East

2000

RF Cafe - Click to view full-size current Narda Microwave East

Narda Microwave East

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Amplifonix   RF Cafe - Wayback™ Machine website archive: click to view full-size Q-Bit

Amplifonix          Q-Bit    

 1999             2000

RF Cafe - Wayback™ Machine website archive: click to view full-size Salisbury Engineering

Salisbury Engineering

1996

RF Cafe - Click to view full-size current Spectrum Microwave

Spectrum Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size antennas.us

antennas.us

2002

RF Cafe - Click to view full-size current antennas.us

antennas.us

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Alliance Test Equipment

Alliance Test Equipment

2005

RF Cafe - Click to view full-size current Alliance Test Equipment

Alliance Test Equipment

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Z-Communications

Z-Communications

1996

RF Cafe - Click to view full-size current Z-Communications

Z-Communications

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Instruments for Industry

Instruments for Industry

(IFI) - 1996

RF Cafe - Click to view full-size current Instruments for Industry

Instruments for Industry (IFI) - 2009 

RF Cafe - Wayback™ Machine website archive: click to view full-size Axsem

Axsem

2007

RF Cafe - Click to view full-size current Axsem

Axsem 2009

RF Cafe - Wayback™ Machine website archive: click to view full-size 3Gmetalwork

3Gmetalworx

2003

RF Cafe - Click to view full-size current 3Gmetalwork

3Gmetalworx

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Zeland Software

Zeland Software

1997

RF Cafe - Click to view full-size current Zeland Software

Zeland Software

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size American Microwave

American Microwave

2003

RF Cafe - Click to view full-size current American Microwave

American Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Dow-Key Microwave

Dow-Key Microwave

1997

RF Cafe - Wayback™ Machine website archive: click to view full-size

Dow-Key Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Pulsar microwave

Pulsar Microwave

2000

RF Cafe - Click to view full-size current Pulsar microwave

Pulsar Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size RFAC Solutions

RFAC Solutions

2005

RF Cafe - Click to view full-size current RFAC Solutions

RFAC Solutions

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size BC Power Systems

BC Power Systems

1997

RF Cafe - Click to view full-size current BC Power Systems

BC Power Systems

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size PCB Material World

PCB Material World

2006

RF Cafe - Click to view full-size current PCB Material World

PCB Material World

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Haynes-Bent

Haynes-Bent

2004

RF Cafe - Click to view full-size current Haynes-Bent

Haynes-Bent

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Lemos international

Lemos International

2000

RF Cafe - Click to view full-size current Lemos International

Lemos International

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Applied Computational Sciences

Applied Computational

Sciences (ACS)

2001

RF Cafe - Click to view full-size current Applied Computational Sciences

Applied Computational

Sciences (ACS)

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Test Equipment Connection

Test Equipment Connection

2000

RF Cafe - Click to view full-size current Test Equipment Connection

Test Equipment Connection

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Amplifier Solutions

Amplifier Solutions

2004

RF Cafe - Click to view full-size current Amplifier Solutions

Amplifier Solutions

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Networks International

Networks International

1999

RF Cafe - Click to view full-size current Networks Internatinoal

Networks International

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size JQL Electronics

JQL Electronics

2003

RF Cafe - Click to view full-size current JQL Electronics

JQL Electronics

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Wenteq

Wenteq

2003

RF Cafe - Click to view full-size current Wenteq

Wenteq

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size American Standard Circuits

American Standard Circuits

2001

RF Cafe - Click to view full-size current American Standard Ciruits

American Standard Circuits

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size vidaRF

vidaRF

2007

RF Cafe - Click to view full-size current vidaRF

vidaRF

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Advanced Test Equipment

Advanced Test Equipment Rentals

1997

RF Cafe - Click to view full-size current Advanced Test Equipment Rentals

Advanced Test Equipment Rentals

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Reactel

Reactel

2000

RF Cafe - Click to view full-size current Reactel

Reactel 2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Tharsus Engineering

Tharsus Engineering

2001

RF Cafe - Click to view full-size current Tharsus Engineering

Tharsus Engineering

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Coaxial Dynamics

Coaxial Dynamics

1996

RF Cafe - Click to view full-size current Coaxial Dynamics

Coaxial Dynamics

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size PedaSoft

PedaSoft

2007

RF Cafe - Click to view full-size current PedaSoft

PedaSoft

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Procyon PCB

Procyon PCB

2004

RF Cafe - Click to view full-size current Procyon PCB

Procyon PCB

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Analog Devices

Analog Devices

1997

RF Cafe - Click to view full-size current Analog Devices

Analog Devices

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size JFW Industries

JFW Industries

1997

RF Cafe - Click to view full-size current JFW Industries

JFW Industries

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Linx Technologies

Linx Technologies

1999

RF Cafe - Click to view full-size current Linx Technologies

Linx Technologies

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Skyworks Solutions

Skyworks Solutions

2003

RF Cafe - Click to view full-size current Skyworks Solutions

Skyworks Solutions

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Orbel

Orbel

2001

RF Cafe - Click to view full-size current Orbel

Orbel

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Antenna Factor

Antenna Factor

1999

RF Cafe - Click to view full-size current Antenna Factor

Antenna Factor

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size RFHIC

RFHIC

2001

RF Cafe - Click to view full-size current RFHIC

RFHIC

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Jyebao

Jyebao

1998

RF Cafe - Click to view full-size current Jyebao

Jyebao

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size European Antennas

European Antennas - 2000

(now part of Cobham)

RF Cafe - Click to view full-size current European Antennas

European Antennas - 2009

(now part of Cobham)

RF Cafe - Wayback™ Machine website archive: click to view full-size MECA Electronics

MECA Electronics

2001

RF Cafe - Click to view full-size current MECA Electronics

MECA Electronics

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Connector City

Connector City

2001

RF Cafe - Click to view full-size current Connector City

Connector City

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Innovative Power Products

Innovative Power Products

2006

RF Cafe - Click to view full-size current Innovative Power Products

Innovative Power Products

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Microphase

Microphase

1997

RF Cafe - Click to view full-size current Microphase

Microphase

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Amplical

Amplical 2004

RF Cafe - Click to view full-size current Amplical

Amplical

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size NuWaves

NuWaves Engineering

2003

RF Cafe - Click to view full-size current NuWaves

NuWaves Engineering

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Colby Instruments

Colby Instruments

2004

RF Cafe - Click to view full-size current Colby Instruments

Colby Instruments

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Noise/Com

Noise/Com

2002

RF Cafe - Click to view full-size current Noise/Com

Noise/Com

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Microwave Circuits

Microwave Circuits

2004

RF Cafe - Click to view full-size current Microwave Circuits

Microwave Circuits

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Highland Technology

Highland Technology

1998

RF Cafe - Click to view full-size current Highland Technology

Highland Technology

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Isotec

Isotec

2005

RF Cafe - Click to view full-size current Isotec

Isotec

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Empower RF Systems

Empower RF Systems

2002

RF Cafe - Click to view full-size current Empower RF Systems

Empower RF Systems

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Praxsym

Praxsym

1999

RF Cafe - Click to view full-size current Praxsym

Praxsym

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size RF Dude

RF Dude

2002

RF Cafe - Click to view full-size current RF Dude

RF Dude

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Applied Wave Research

Applied Wave Research

2004

RF Cafe - Click to view full-size current Applied Wave Research

Applied Wave Research

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size RFtronics

RFtronics

2006

RF Cafe - Click to view full-size current RFtronics

RFtronics

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Noisewave

Noisewave

2005

RF Cafe - Click to view full-size current Noisewave

Noisewave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Polyphase Microwave

Polyphase Microwave

2005

RF Cafe - Click to view full-size current Polyphase Microwave

Polyphase Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size KR Electronics

KR Electronics

2000

RF Cafe - Click to view full-size current KR Electronics

KR Electronics

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Comdel

Comdel 2000

RF Cafe - Click to view full-size current Comdel

Comdel

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Star Microwave

Star Microwave

2004

RF Cafe - Click to view full-size current Star Microwave

Star Microwave

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Fotofab

Fotofab

2001

RF Cafe - Click to view full-size current FotoFab

Fotofab

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Sunshine Design Engineering Services

Sunshine Design Engineering Services

2003

RF Cafe - Click to view full-size current Sunshine Design Engineering Services

Sunshine Design Engineering Services

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Vector Telecom

Vector Telecom

2007

RF Cafe - Click to view full-size current Vector Telecom

Vector Telecom

2009

RF Cafe - Wayback™ Machine website archive: click to view full-size Boonton

Boonton

1998

RF Cafe - Click to view full-size current Boonton

Boonton

2009

Posted September 8, 2009

RF Cafe University"Factoids," "Kirt's Cogitations," and "Tech Topics Smorgasbord" are all manifestations of my rantings on various subjects relevant (usually) to the overall RF Cafe theme. All may be accessed on these pages:

 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36

Copper Mountain Technologies (VNA) - RF Cafe
LadyBug Technologies LB5944A RF Power Sensor - RF Cafe
RIGOL Technologies (test equipment) - RF Cafe
 

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