RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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

My Hobby Website:
 AirplanesAndRockets.com

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Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes RF Cascade Workbook RF Stencils for Visio Shapes for Word Thank you for visiting RF Cafe!

Hybrid Tube Amp for the Raspberry Pi
Cool Product Report

Hybrid Tube Amp for the Raspberry Pi - RF CafeVacuum tube products, once the domain of vintage equipment collectors and restorers (like moi), are increasingly becoming part of the mainstream retro electronics movement. Usually the tube portion of a circuit is limited to the output amplifier or maybe a preamplifier in an audio frequency application, where amplitude stability is not a major performance factor. RF tuning and detector circuits use, thankfully, modern microelectronic components in order to benefit from precision digital tuning and even computer interfaces. Audiophiles have long held that the microphonic action of physical elements within the vacuum tube adds a warm quality to sound that cannot be replicated with solid state devices.

Raspberry Pi 3 Complete Starter Kit - 32 GB Edition

Raspberry Pi 3 Complete Starter Kit - 32 GB Edition

This 503HTA Hybrid Tube Amplifier is yet another highly successful Kickstarter project that is built around the Raspberry Pi single board computer (SBC). The project has far exceeded its support goal of $20,000 with $78,744 already pledged and 25 days still to go. Per the website:

"Pi 2 Design is excited to introduce the first Tube Amp specifically designed for any of the 40-pin versions of the Raspberry Pi SBC Family. The 503HTA Hybrid Tube Amp HAT, designed and manufactured by Pi2Media (a division of PI 2 Design), is a High Quality I/O Shield designed to bring 'Sweet Tube Sound' to the Raspberry PI ® family of Single Board Computers. This HAT allows the Raspberry Pi ® SBC to drive Headphones from 32 - 300 ohm with ease and fidelity.

Based on the popular Bravo V2 design with all recommended Mods, the On-Board PCM5102A DAC drives the single stage 12AU7 (or 6922) tube. The Class-A Output Stage is comprised of the IRL510 and LM317A. The dedicated heater supply insures zero crosstalk."

There is now a  $100K "Stretch Goal # 2" to upgrade capacitors, the power switch, and a volume control option.

The inventions and products featured on these pages were chosen either for their uniqueness in the RF engineering realm, or are simply awesome (or ridiculous) enough to warrant an appearance.

All Featured Product Archive Pages:

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Posted on May 12, 2016