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Bill N2CQR has used 24 VDC on his BitX40 for transmit power, getting about a Watt per Volt. Look through his blog entries for November. soldersmoke.blogspot.com 73, Todd K7TFC

BITX20@...> wrote: nope, heavy metals R first powered then binded... Think! will get answer, otherwise it's inductance-cooker...

For discussions of using a tap washer, see the original BITX design; search this group for a lot of answers... The point of using a plastic washer is that it will provide the self-shielding

You're correct, I have no way to measure inductance. My quick look at making an air inductor showed it would be larger than I'd like to mess with, as I have replacement parts en route from FL. I

Hi Rich, For QRP operation (5W) just feed it 12V. I have mine wired in parallel with the main power and that's the end of it. But, if you want higher wattage, it can be powered separately with up

Unfortunately, I doubt Kent has tools to measure inductance, and so has no way to accurately create a 6 uH coil using a tap washer. When I hear tap washer, I think of one of those little rubber

at the power levels of the band pass filter, there is no fear of the tap washer being saturated. to test this, try microwaving it. - f [BITX20] <BITX20@...> wrote:

While eagerly awaiting the arrival of my Bitx40 (which I just ordered yesterday), I took the time to look over the wep page at hfsigs. I noticed it said something about using a separate power supply

Wouldn't a tap washer become saturated? Or are you suggesting it as a stopgap until the proper toroid can be obtained? RichKC8MWG

The L2 will need 6uh inductance. This will need a fairly large coil. The advantage of the toroids is that they are self shielding. The air core coil is bound to pick up magnetic fields from other

Pictures of Raduino, Yahoo! Groups https://groups.yahoo.com/neo/groups/BITX20/photos/albums/1887368748 https://groups.yahoo.com/neo/groups/BITX20/photos/albums/1887368748 Yahoo! Groups

While you're waiting for a replacement core, you could replace L2 with an air wound coil, wound on a soda straw or the like. Plenty of "single layer air coil calculators" out on the web to determine

L2 is in the signal path for both transmit and receive. Replacing the 6uH L2 with a piece of wire will mess with the tuning of that filter, and almost certainly reduce the signal that gets

Thanks for the video. Testing shows the L2 is definitely bad. No signal passing to C3. I've "extracted" the remains of L2 since it was already cracked. Removing the superglued remains was trickly,

Jack, Yes, 1.6.12 will compile, here's some shots of it working Joel KB6QVI

?Rename it to something without “-“ in it. That won't always work. As a general rule, the library subdirectory must match the *.h and *.cpp file names in the library. So, if the library

Yes, that's what I said: I could compile and link the code, but could not test it because my DDS is in use. I have not downloaded/installed 1.8 yet, as I want to get my current project stable. Can you

Sorry, just discovered that my stupid nickname, that I have chosen years ago, is still showing up although I wrote my real name and callsign into my profile. Name here is Helmut and call is OE4HDS.

V2 doesn't say it's Beta anymore, so I'm assuming it's the final version, although NT7S is still cranking out additional Betas past 2.0. I'm on the mailing list and see lots of things that are way

Parameters to the functions changed with v2.0. Just check si5351.h how and which. Should be fairly easy to do. Not sure if v2 still has beta status Sent from my iPhone