So am working on answering this question:

Can I merge two impedance matching circuits?

but it seems like I'm the only person trying to do an in-depth analysis of it. Does this site have anyone with RF experience? I would think the amateur radio guys would be all over this question.

Just seems weird to me.


5 Answers 5


While I am both an amateur radio operator / license holder (VE3TIX), and a member of IEEE, I am not a professional engineer (P.Eng), or a educated / employed as an electrical / electronic engineer (EE). Let alone a RF engineer.

There are various reasons, like the amateur radio community is probably one hundredth of the size of the IT / programming community in any given country, there is simply a smaller pool of people to participate. Then there is the massive demographics difference of age. While amateur radio is still growing in popularity in USA and the rest of the world, the average age of hams are close to 60-65 years old, versus (early) 20s average for programming (my guess). Finally I have not seen a single person promote this forum to the numerous existing amateur radio forums and web sites: QSL.net, eHam.net, QRZ.com, AC6V, and the cornucopia of Yahoo and Google Groups. A lack of promotion means a lack of awareness.

Part of me finds it selfish to ask why isn't there more people willing to answer a particular question or class of questions. That seems like a failed approach to growth. A better question is how can the forum community foster better representation, relations, or build bridges to existing external communities. The first of which for me is that the community needs to be useful to the contributors, as well as the questioners. I see no advantage of me taking my own time to write up answers, draw schematic excerpts, and find online references I can link to if I am not confident that there is willingness of the group to do the same for me, when I have a question.

Secondary issues include that good questions and answers in electronics more often need visual representation (i.e. diagrams, typically schematics) and lack of online reference material suitable to linking to.

The lack, compared to the printed ("dead tree") library, of high quality legal and stable, freely available reference material to refer and link to compared to the massive amount of online material for StackOverflow available from university computer science programs. To take three examples, I don't know of anything available (legally) online that is anywhere near equivalent to Antennas by Krause (3rd edition is now out-of-print), Art of Electronics by Horowitz and Hill, and the ARRL Handbook by ARRL (2011 ed. link). To the best of my knowledge there is nothing comparable. Heck, there is isn't even enough available to be equivalent to the first 1-2 university-level electronics courses. Lessons in Electronic Circuits is perhaps the best, but it is unfinished, largely stalling since 2004.

Back to the Professional Engineer comments (@Brain Carlton), to the best of my imperfect knowledge professional engineers like lawyers, often avoid publicly giving even "unofficial" advice, in part due to professional liability concerns. I expect this extends to other working "engineers". So I expect there a historic cultural difference towards not sharing or helping of non-peers from within the electronic engineering community. Hams also have this cultural avoidance tendency to avoid giving RF advice to non-licensed amateurs, as these non-licensed usages have historically been dominated by illegal (Radiocommunication Regulations) activities such as unlicensed amplification of CB or Wi-Fi equipment, which when done incorrectly creates interference with other licensed radio operators (including the hams themselves).

Side note: In some countries the "engineer" job title is legally restricted to licensed professionals (Iron Ring), such as Canada, so I feel obliged to quote this title, in Canada they would tend to be electronic technicians, as I believe is the most common equivalent job title in Canada.

  • \$\begingroup\$ Very interesting answer, mctylr! I've been using the SE image upload feature quite often to include schematics. Thanks for the Ham web links, too -- will spread the word! \$\endgroup\$
    – tyblu
    Jan 16, 2011 at 6:16
  • \$\begingroup\$ Just a note on your comment on lack of online schematics, have you tried to search on google images for "schematic" plus a keyword relating to the circuit you're looking for? I find this very useful. \$\endgroup\$
    – BG100
    Jan 16, 2011 at 9:52
  • 1
    \$\begingroup\$ I was thinking in terms of the additional time needs to draw schematics, but I will keep your suggestions in mind for the future. Thanks. \$\endgroup\$
    – mctylr
    Jan 17, 2011 at 0:06

I have answered questions before that were RF because noone else did.

It seems we do not have many HAMs yet, but I think if our RF question pool increases the number of hams that come to the site will also.

I am RF, but mostly theoretical and I have built FMCW radar system before.

Lets hope our RF questions continue, and quality answers like yours appear, so that we can build a few more RF guys.


Well, if you know where the RF guys (and gals) hang out, a gentle prod of

hey, I have this question over here if anyone is interested

posted to the appropriate RF forum might help?

We also have lots of ways to share links, such as


and doing so is always encouraged to grow the "right" audience of people that know their stuff, and are interested in high quality technical Q&A!


They are a rare breed, normally found congregating ... well, nowhere, as they are in their "ham-shack". May need to start broadcasting questions. Doesn't emacs have a command that does this? C-x M-c M-sweepVHFUHF or something.

On another note, I've studied RF in a bit of depth, but have no experience. I've found that mixture of knowledge to be especially untrustworthy.


I'm not convinced many professional EEs are here either. By that I mean people employed as EE, not a "Professional Engineer" who is an EE. And RF are a scarer subset.

  • \$\begingroup\$ I am not sure I follow, what do you mean by "By that I mean people employed as EE, not a "Profession Engineer" who is an EE."? \$\endgroup\$
    – Kortuk
    Jan 10, 2011 at 0:29
  • \$\begingroup\$ pretty simple. Someone who has knowledge of EE but is not employeed as an EE. In other words it is their hobby not their profession. \$\endgroup\$ Jan 10, 2011 at 22:24
  • \$\begingroup\$ The whole site is small, but of the people who answer questions most of them are EEs working a job related to EE. \$\endgroup\$
    – krapht
    Jan 11, 2011 at 0:39
  • \$\begingroup\$ What I mean by "Professional Engineer" is someone who (in the U.S.) has a PE license from the state. Mainly those are Civil Engineer. \$\endgroup\$ Jan 11, 2011 at 1:06

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