I like RF Circuit Design by Christopher Bowick. He includes design exercises to go along with the theory. There are a couple of the same title so make sure to also look for the author. 72 John kc9on

The YACK (Mini-Yack) from Possumlodge on Ebay will be back on line in a few days (along with on my kc9on.com web site). Got a bit behind from some unfortunate July events. 73 John kc9on

Most of the time I use my magnifier lamp (with an eye loupe sitting on top) and use a cheap set of head mounted magnifiers. But when it gets real tough or I want to take a picture/video I use a USB mi

Thanks for the Ebay mention Gwen! There are more Pixie & QRP goodies on the main web site including a Pixie, Switch, & Crystals bundled together. Most of the kits are geared toward easy building. http

Also available are 41.090 and 41.400 to make a receiver with a 9MHz IF. https://kc9on.com/product/40-50mhz-hc49s-short-crystals-3ot/

It's been a regulation for years now. Not sure about all post offices but at mine above the inside drop off bin (not sure about those blue corner boxes) is a sign that says nothing greater than 13oZ,

Reminds me of the old Star Fleet Technical Manual (yup, I'm a nerd!). In there on page T0:03:02:01 is a schematic for the "20th century terran early development" 3 transistor communicator using PNP Tr

>Does the oscillator run okwith an HC49S, and with180p at C9 and470 at C10? Does it start okboth at 3580 and 3560? So far it's working with 3535 3550 3560 and 3579 - all HC49/s small cases, have not s

Hi Wayne and all, Started my own cricket build last night and mostly finished up this morning. During the build I installed some 2-pin headers at position C9,C10, & C15 along with a 3 pin right angle

JAN is no longer making crystals either? Wow! Last night and a little today I was home brewing and experimenting with part of the cricket while waiting for the official kit to arrive. An ESR more than

I would have to concur with the last few posts. C10 seems to light to me. I used up to 470pF for C10 (and 270pF for 40M) and even lowered R2 down to a 330 ohm 1/2W resistor when playing with an SVXO c

Greetings all, The FT-243's have sold out faster than the bank runs in 1929. I'm burning the midnight oil to get what's left off in the mail. If I run across more at a decent price I'll offer them aga

Greetings all, Yes the switches are out of stock but I am patiently waiting for the next batch of PCB's to arrive. Will have more in a few weeks. 73 John kc9on

More available here: http://kc9on.com/store/kits/pixie-switch/ Will have a new listing back on Ebay in a few minutes..... 73 John kc9on

I agree on using LTSPICE. It's a little awkward and take a bit of getting used to. However, there is a huge support community out there for it, even an active Yahoo group. If there is a specific part

Very Cool, Chuck! How did you get it on 60M? Custom Crystal or a DDS/si5751 type VFO? Never played on 60M even though one of my rigs is opened up for it. 72 John kc9on

Thanks for the neat site and all the work involved in maintaining it! 72 John kc9on

I agree Lee, we did this at our local club to generate activity and get some of the newer tech's, with rocks on their segment and the supplied 50 ohm resistor, experience in building and to show the f

Whoops, had a type-o on my web page. The Chinese rigs are coming with 7.023 crystals. I see some of the Epay places list them going from 7.023 to 7.026 but with HC49/s "rectangular AT Strip cut" cryst

Looks like you saw many of the same things I did during the build. http://kc9on.com/ham-radio/chinese-qrp-kits/ One thing I can't check was the output. Would be interesting to see if a LPF is needed a