Amateur Radio and Electronic Hobby Kits, Parts, and Accessories

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Welcome to 3rd Planet Solar

& the shack of KC9ON


 Want to know more about Amateur Radio, QRP, or HF Digital Modes?

Visit the Ham Radio page for Amateur Radio information and links!


Download our 2017 Catalog


FT-243 conversions are back in stock


We have a few of the new Prototoids-SMT boards available


The USPS had increased rates again 🙁

Please see our Store Information page for new rates.


New Parts added to our ODDS & ENDS page

FT23-43 Toroids 5mm Red LED 7806 6V TO-220 Regulators
MC145051 10-bit ADC SP232 RS-232 Drivers 40-pin Dip Sockets



Download our 2017 Catalog


Prototoids Worksheets are available for downloading

Prototoids-R-top prototoids-r-worksheet

3CPO Kits are back in stock!


*** 7110 HC49s Crystal are back in stock ***


7035   7045   7048   7060  &  14048

(and we are working on 6M frequencies next)


HW-8-MC1496 Adapters are back in stock!


Fox Hunt Offset Attenuator Kits are back in stock!


Pixie Switch kits are back in stock!


HW-8-LM386 audio kits are back in stock!


HW-8-TR QSK T/R replacement relay boards are back in stock!


Check out the Odds and Ends page

New parts added

IRFL110 MOSFET, Terminal Blocks, 0805 SMD Resistors and Caps, 1/4W resistors


Shack Cleaning time and we have a bunch of [almost] FREE books that need to go!


CALF – The Configurable Audio Limiter Filter is back in stock!


A Review of the Chinese RTL-SDR

100KHz-1.7GHZ Software Defined Radio Kit


Reverse Polarity Protection kits

Surface Mount Version

are now available!


Reverse Polarity Protection kits

are now available!


Mini-Yack – Iambic keyer & trainer

(little brother of 3CPO)

are now available!


Prototoids Prototyping PCB’s are now available!

 2016-01-30  Full Reverse Polarity Protection article from the T5W exerpts can be found here.

What’s 3rd Planet Solar all about?  Check it out in the About section.



Bagging a CALF herd




A few pictures of the shack:


Shack-Wide NewShack2 CALF-3CPO-HW-8
Once in a lifetime event – The bench is clean! 2016 Shack Upgrade The happy trio – HW-8, CALF, and 3CPO



The gear consists of an Icom IC-725 and MFJ 949D tuner/meter as the primary HF station with a Bencher and 3CPO for CW.  The old TRAC keyer still works but mostly retired now.  The main antenna is a simple 40M bowtie dipole which works pretty good on all bands.  Lately my Heathkit HW-8 has taken center stage pretty much replacing the IC-725.  Since my first HW-8 there is now a HW-7 and another HW-8 for camping.


The 2M primary station is an IC-251H with killer audio and RF output.  For Satellite and ISS work a Yaesu FT-290RII and Kantronics KAM fills the bill.  Yes, you can work the Space Station on just a watt or two and a simple vertical antenna!


When home-brewing and repairing we also use some fairly older equipment.  Heathkit IG-1271 signal generator, B&K 512MHz frequency counter, Philips 100MHz scope, Autek WM-1 RF/SWR meter, Heathkit IM-1210 DMM, Ramsey COM3 service monitor, Bird Wattmeter (that I always want more slugs for!), a few handheld DMM’s, my Digital Dummy Load, bench vise, and of course a Tenma solder reworks station.


Not pictured of more old equipment I pull off the shelf from time to time to play with.  A Kenwood TS-520 (under restoration), TS-530, Heathkit HW-16, HW-7, 2nd HW-8, HW-101 (under restoration), and my first rig an old Hallicrafters HT-17 (also under restoration).


Thanks for stopping by and 73!

John kc9on



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