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Hi Paul As others already noted, the table is peak voltage, not peak-to-peak. That's where the missing division by 2 comes from. Also bear in mind that table is for 50 ohm load. You were using 36

OK on the power formula and the P-P vs. Peak Volts. Will work on antenna connection and move it to the slow speed. Paul K3PG

Guys, FWIW the formula for calculating RF power into a 50 ohm load from the peak to peak voltage observed on a scope is :- Power = 2.5 x (Peak to peak voltage squared) milliwatts So if you have a

Hello Seems that there is some confusion regarding how to measure RF power. There are several voltage measurement methods, including: * Average voltage * RMS voltage * Peak volts *

Hans Thanks for your comments. The beacon has been running for several days now and the final seems ok temp wise with the output at 5.08V. I used this table of RF volts into 50

Hi Paul Congrats on finishing the kit. Yes, the transistor can get a bit hot when tuned for maximum output and it is best to turn the trimmer pot a bit back towards the "cold" end (ground) to lower

Got the kit running on the bench still on 12 wpm with 36 ohm dummy load I am getting 5.08V p to p output on the scope. This is somewhere around 250 mw and is set somewhat below max output as max

With the rain coming up the East Coast I broke out my QRSS Beacon kit and got it started. On step 4 of the build I see a signal on the scope but can't find it on the rx or counter. Seem to have a

Just a reminder that the Iowa High Altitude Balloon (iHAB) project will launch their second balloon with QRP beacon on Saturday. This launch is sponsored by QRP ARCI. The launch is scheduled for

Sage advice Yan, and I will investigate. I did stumble upon the WSPR info and it started my thought process. Thank you for the PowerSDR article...I will glean what I can and get this puppy on the

Hi Brad, The easiest : tune to WW-V on 10 MHz and 15MHz. You should have a sharp carrier and will be able to notice your VFO error on two points. If you are not able to receive WW-V or WW-H, there is

Update: To clarify, I need to "calibrate" ARGO in order to understand where my signal is being transmitted. Any pointers will be appreciated! 73 Brad

...my version of the QRSS board for 30M. Nice quick build and after a little bit of fiddling with the gimmick capacitor I have a nice 5Hz shift as seen in Argo while transmitting through a dummy

All I have the online shop up and running, please scroll down to the bottom of the left hand menu on my website home page http://www.hanssummers.com or visit http://www.hanssummers.com/shop to see

Hi all Please note people, that you may also need to reduce the value of the capacitors in the base/emitter of the Colpitts oscillator. They are 220pF in the 30m version. I think for 20m I think I

Guys, This may save you some time. The beacon design uses the standard harmonic output filter designs used by the GQRP club documented here http://www.gqrp.com/technical2.htm. So a good starting

Chris KE9YK Use the calculator located here <http://toroids.info/T37-6.php> Select your core type, plug in the frequency and any one other value and it will spit out the inductance, turns,

Has anyone worked out the inductor values for 20m. I have a program somewhere but can't find it now that it's needed. Thanks, - Chris KE9YK

Hello everyone, I am waiting for some toroids to arrive from the USA so that I can complete this run of kits. The 40 and 80 meter kits did not sell so well so I will be using what I have left for 30

IMHO the issue might be google. I have had a googlemail account for a few years, a couple of months ago google asked me to change from googlemail to gmail. I did this and whilst i still get googlemail