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Mounted a bigger heatsink to my pa transistor. Should this be adequate for 20 watts output? RichKC8MWG Sent via the Samsung Galaxy Express 3, an AT&T 4G LTE smartphone

Forgot to mention, the converter does not allow the voltage from input to pass to output when disabled, so a double DPDT switch will be required to do QRP/QRO from a single 12V battery -- Ion VA3NOI

Hi Robert! I don't think you will get much more noise as the DC/DC converter is only supplying power to the Power amplifier. I did not use it myself as I am not finished with the other tweaks I want

Ion, did you experience any RF noise when connected? ?I used a DC DC buck step down to power the QRP Labs DDS VFO (need 5v) from the 12v supply of the bitx40. ?I ended up building a 7805 circuit

For an online tutorial and reference that I find easy to read. tronixstuff tutorials ( tronixstuff.com/tutorials/ ) -- Rob G4NQX

Randy: Very true. Also, I have yet to buy any Chinese knockoff that didn't work as expected, so don't be afraid to buy a couple. On the expansion board I pictured, I failed to mention that those

Jack Thanks, there is so much Arduino stuff out there to play with. Your books are due to arrive on Monday. Randy, K7AGE econjack@...> wrote:

If you want to get started experimenting with an Arduino, the kit Randy mentions is one alternative. For about the same price you can get this starter kit:

Thanks Jerry! -- 73, Paulo CS7AGH A.R.L.A. #100 / A.R.L.C. #100 / DMC #08386 / EPC #25379 / Field Radio Operator #IFR212 / Portuguese QRP Radio Club #079 / QRP Respect #295 / SKCC #12615

Any business ends correspondence goes to ? ? hfsignals at gmail dot com I am words for @ and . because posts here won't show a complete email address. That email address really needs to be up on the

Hey Randy, thanks. Yes, I saw the article in QST. I will definitely check out Paul’s videos …. Good stuff. 73, Jim – K4AEK Sent: Friday, February 03, 2017 10:00 AM To: [email protected] Subject:

Jim Paul Whorter has a whole series of videos on the Arduino. Paul is a ham and a high school teacher in engineering and computers. His students build high altitude balloon projects. If you are an

I, for one, would like to see a basic "minimalist" enclosure, big enough for the parts included in the kit but not TOO crowded, both in metal and in 3D printable format. This would make for a nice,

For the parts that come with the kit (these are actual, measured part diameters - adjust your holes for clearance): Volume potentiometer: 6.80 mm Tuning potentiometer: 9.65 mm Stereo jacks (for mic

What size would you like to see for an Metal Box enclosure??? I started drawing with a 6" wide x 6" depth x 3" height?? So the front and back panel is 3" high, the flat bottom is 6" wide by 6" in

Creating a Metal Enclosure? using LibreCAD.org drawing, output file Autocad 2007 .DXF file. For the moment,Feb 3, I can't upload any files to [email protected] ? Uploading the .DXF file and a

Out of the junkbox came 33uf @25V radials..(5 for $1 @ALLELECTRONICS.COM)? I twisted the negatives together and made a 3 legged device, Tacked soldered it on the 3 legs of the 5v regulator. Center

I tried this thing: Boost-Buck-DC-DC-adjustable (

Thanks VA3NOI,73` Sent from Yahoo Mail on Android

To get a higher PA voltage using a DC booster what sort of power supply do you use? Can you use an AC to DC plug pack? ?Say 16VDC at 3A or whatever? Thanks - Noel