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I just ordered a zBitx at HFSignals.com for $178 shipped. Ashhar Farhan's new rig will ship starting in February. Bob KF6ABC

Elecraft has just announced the AX3 antenna. 6 bands, 30, 20, 17, 15, 12 & 10m. You have to have a tuner to use it. It comes with a very small tripod (3 rods fit in 3d printed base of antenna. Cost 274 dollars. Yes, that is correct. It can be seen on their website. I am interested in others opinions of it and if anyone is going to buy one. Doug

I will be at the Baylands starting with lunch. Hope to see many of you. Hiroki AH6CY

Fact Checking: The active cascode amplifier was invented in 1979 and included in Analysis and Design of Analog Integrated Circuits, first edition 2001. They are a refinement of the cascode amplifier which goes back to vacuum tubes. I back in the day, I used discrete transistors for amps into 10's of MHz. The abstract to Ed's talk said they were what made the NanoVNA and TinySA possible. These devices use direct conversion. No amplifier on the front end. Yes, they have mixers and switches for the input circuits. The enabling hardware for these amazing devices is mostly the digital chips and a display that can all be powered by a battery. That said, these hand held devices are can be really handy. ----- Forwarded Message ----- From: Steve Stearns via FARS-Announce <fars-announce@...> To: 'FARS Announce' <fars-announce@...> Sent: Friday, March 28, 2025 at 11:08:13 AM PDT Subject: [FARS-Announce] FARS March Meeting - Tonight! Foothills Amateur Radio Society Membership Meeting on Friday March 28 ... Presentation: Broadband (4 GHz) Precision Amplifiers Speaker: Ed Fong, WB6IQN Summary: We are now all familiar with the NanoVNA and the Tiny SA. There are also numerous digital scopes now that are very affordable. An example is the DSO03D12 - a dual trace color portable oscilloscope with probes that easily measures in real time up to 150 MHz. This instrument also has built in DVM and signal generator – all for less than $150. These instruments would have cost in the thousands of dollars 10 years ago. Only the most serious hams own expensive HP or Tektronix equipment So why are they now all so affordable? The simple answer is an innovative operational amplifier (“op amp”) design. For the last 50 years, op amp design followed a tried-and-true formula that did not change. Dave Fullagar designed the uA 741 in 1968. It had unity gain bandwidth of 1.5 MHz. True, small incremental improvements happened over the years, such as current mode feedback. However, these were evolutionary, not revolutionary. Steady improvement in semiconductor processing gave incremental gains in frequency response (10’s of MHz at most). However, in the early 2000’s a new amplifier topology was invented that allowed controlled high precision feedback gains in the 4-6 GHz range. This configuration is only now finding its way into amplifier text books. Ed will explain this new circuit configuration and how it works. About the Speaker: Ed Fong, WB6IQN, teaches RF Wireless Communications and I/O Design Fundamentals for UC Santa Cruz in Silicon Valley. He taught RF Wireless at UC Berkeley from 1998 to 2011. Ed is the owner of Ed’s Antennas https://edsantennas.weebly.com. Ed’s DBJ-1, DBJ-2, and TBJ-1, dual- and tri-band antennas are popular with hams, commercial and government users, and were featured in magazine articles in QST (February 2003, March 2007, and March 2017) and CQ (Summer 2012), and reprinted in three ARRL books: VHF/UHF Antenna Classics (2003), Antenna Compendium Volume 8 (2010), and Portable Antenna Classics (2015). Ed’s past presentations to FARS include the uSDX+ portable HF transceiver (November 2023), phase-locked loops (August 2023), single-sideband modulation (January 2023), ground-independent vertical antennas (August 2019), and DMR radio (April 2018).

Does anyone have Eric's email address or Eric, if you are reading would you please email me at doghouse3@...? Thanks, Joy

WX looks decent. I plan to be at the Baylands starting with lunch. Hiroki AH6CY

Hey folks, if you have successfully sold some ham gear and actually received payment via PayPal ... From EU ... I could use some free advice. Been through the online help PP offers, nothing amiss. I just can't get it to work. Thanks, Cliff K6CLS. phone 408 234 9281.

Eric et al, Here is a YouTube recoding of the talk I gave on Wednesday, March 26. https://youtu.be/8B2MP1q1l58?si=ENr-wGk5JxKe3WsD Hiroki AH6CY

I will be at the Baylands starting with lunch. WX looks good for ops. Hiroki AH6CY

Two members of this group, Carol Millazo and Hiroki Kato will be giving qrp talks this year at Pacificon along with 4 others. Here is a list of the talks Title: Upgrading the Tuna Tin "S" - A Synthesized Multi-Band QRP Transmitter Presenter: Carol Milazzo, KP4MD Description: In the original Tuna Tin "S", an Arduino Nano microcontroller and Si5351 synthesizer module drive an IRF510 MOSFET to a QRPp 0.5 watts output on a single band. In this session we will review the history and design of the Tuna Tin "S" and discuss how we can improve the MOSFET amplifier's efficiency, raise its output power output to a full QRP 5 watts, and design filters for operation on multiple frequency bands. Title: Home Brewing Portable HF Antennas Presenter: Hiroki Kato AH6CY Description: I will present three examples of my home-brewed portable HF antennas. 1. A small vertical antenna for the hand-held radios 2. A magnetic loop antenna with a unique remote tuning system 3. A 4-band delta loop antenna Title: Construction Techniques for Homebrew Projects for Hams. Why? How? Sources? Presenter: Chuck Adams, AA7FO Description: Why? There is a need to build something of interest or need that isn't available already or is not within a constrained budget. How? A number of techniques that have been used for successful building of projects will be discussed. Sources? Where to find parts? Where to find projects of interest that you can build to use and/or learn some area of interest. Where to get help, if needed. Title: Suitcase Portable POTA Presenter: Tommy Gober, N5DUX Description: For anyone not familiar with Parks On The Air, this session will give a brief overview of this "not a contest" that has reinvigorated many long-time hams. Presented by an avid POTA activator that has activated coast to coast and north to south while on work trips, we'll discuss tips, techniques, equipment options and choices, the limitations of being suitcase portable, and the thrill of driving to an unknown park to activate. This session is for newbies and experienced operators alike! Title: The Pacificon 40, an update to a QRP classic Presenter: Yin Shih, N9YS Description: Many hams are familiar with or have heard of the Norcal 40. Designed by Wayne Burdick, N6KR, over 30 years ago, it was a classic design that garnered attention for the Norcal QRP Club and was a seminal event in the birth of Elecraft. Recently, the California QRP Club thought to ask "If we were to attempt a Norcal 40 kit, what would it look like?", which resulted in an updated implementation called the Pacificon 40. The Pacificon 40 blends the vintage Norcal 40 design with some modern day techniques and components. This talk will describe the adaptations and features of the Pacificon 40. Title: Adapting the PicoRx to a Club Project Presenter: John Sutter, K6JDS Description: I will present the CalQRP project version of Jon Dawson's PicoRx SDR receiver. I'll cover inspiration, the design process, mishaps, and results. Topics to include requirements, floorplanning, circuit, PCB, and enclosure design.

WX looks decent. I plan to be at the Baylands starting with lunch at Bay Cafe. Hiroki AH6CY

Yours truly will be giving a talk on Zoom to a UK group on my portable delta loop on Wednesday, 3/26, next week at 1730Z (12:30 PDT). If interested, open the link for details. https://mailchi.mp/061c13b23919/a-4-band-portable-delta-loop-antenna?e=f7db555f76 Hiroki AH6CY

? Some of us have been buying parts and accessories from Temu and AliExpress. They often offer extremely attractive prices. But I decided not to continue their service. The AARP Bulletin I just received has a few articles about online fraud. In one of them there is a mention that “Mobile apps collect all kinds of personal info, which can put you at risk, especially in case of a data breach. For example, the popular Chinese shopping app Temu collects so much data that one state attorney general deemed it spyware.” There is also a warning that not all Amazon and eBay vendors are trustworthy. Hiroki AH6CY

Hello everyone, It looks like another washout so I have created a Zoom meeting to keep us warm and dry. Friday March 14 2025 @ 11:30 AM to 13:30 Join Zoom Meeting https://us06web.zoom.us/j/82614510537?pwd=EcTiNJ5Yd3oAC5oskt9ozXOP4wMVlG.1 Meeting ID: 826 1451 0537 Passcode: 787810 --- One tap mobile +16694449171,,82614510537#,,,,*787810# US +17193594580,,82614510537#,,,,*787810# US 73 N6POM Howard

Thanks and 73, Oliver KB6BA

If WX turns out to be tolerable, I will be at the Baylands starting with lunch. I am finally back on my two feet. Hiroki AH6CY

Some of you asked for a copy of my articles. Here it is. Hiroki AH6CY

Attention fellow junque addicts: West Valley College will host the first electronics swap meet of the year this Sunday. Don't forget to set your clocks ahead before the event! (double-whammy for sleep-deprived nocturnal types). Hope to see you there! Best, --David KM6RI https://www.electronicsfleamarket.com/

I plan to be at the golf course for lunch and later at the Baylands for ops. PAARA is having its homebrew night, so I also plan to go to dinner at the Green Elephant at 6 and the meeting after at 7. Hope to see you all, Dave W6VYC 415 580-5161

"DXFT8" (FT8 QRPp Transceiver) - Now 7-Band available - Low Kit Price! | QRZ Forums Ron is building one of these and told me know about it. It has a Tayloe I/Q receiver, CMOS driver chip for a PA and STM-32 Disco Board for the signal processing and control. All this for about $100. Dave W6VYC