开云体育

No Raduino here, but do have a Nano to play with. ?Here's a code scrap to replace that final clause in doTuning() to give the tuning pot a bit of hysterisis. ?Perhaps somebody could try it out. //

The birdie heard at 7.199 MHz in my analog VFO board is faint. Not a bother at all. The birdie tunes at 5x so it occupies just about 1KHz. All the additional bypass caps must have helped. Next week

There is yet another way with the Raduinos : Use another clock output directly at the transmit frequency. inject it between the RF amp and the bandpass filter. You will have to key it on and off, of

*"...I really do think this is the best ham radio interview I have ever heard. Congratulations and thanks to Eric and Farhan." - soldersmoke.com <http://soldersmoke.com>* *Here is the link:*

http://soldersmoke.blogspot.com/2014/06/a-new-look-at-bitx-carrier-suppression.html Is this the link? iam74@...> wrote:

Thanks very much for this, John. For the record and/or posterity, I was unable to get a full 1A from HF Sigs' board #869. I turned both R136 and RV1 fully clockwise, then opened RV1 until the Fluke 87

Collins injected an audio tone into the mic input. or so I have been told. Is this as easy as hooking your code oscillator to the mic input? Buck, k4ia Honor Roll 8BDXCC

John U may want to check W5KUB group on Facebook. Tom Merlin post his design yesterday Art Sent from my iPhone

Has anyone succeeded with adding CW properly? I have seen several possibilities on here, but no working examples. If yes, how did you do it? Or is it just impractical, like making milk from chalk and

Since it's not a frequency dependent circuit, you can probably use a FT37-43 with 10 turns trifilar. 73 Ken VA3ABN

I use a 555 timer with RC filters in an altoids tin to produce a 1khz 100mv p-p signal into the mike connector. It works quite well on another rig and I'll try it on the Bitx40. More than likely won't

Look for "BITX20 F8VOA" on page 1. Also "BITX40 py0ohh" on page 2. john AD5YE

I've looked for the "F8VOA folder in the "Files" section and don't see it?

Thanks Marc. I figured you and Miguel would be the first to commend and recommend that she has to say. Ladies and gentlemen, if you want to see what has been accomplished by "noodling" about the BITX

For a broadband transformer, ferrite is better than powdered iron, though both will work in one band. You can use a FT-37-43 or FT-37-61 equally well. For 40m, I should think a T-30-2 or T-37-2 (red)

Just a couple of bits plus Allisons suggestions although this applies more to the homebrew variety. Tips n Mods ( /g/BITX20/files/1%20docs%20of%20Tips%20n%20Mods ) -- Rob G4NQX

my BITX-40 damaged T4 core is black, so I thought it was FT37-43, the diameter is the same, but the damaged is about 1mm thicker than FT37-43 .... anyway i will try to do T4 on ?FT37-43 .... thanks

That's a broadband transformer. ?Either core should work fine, and they likely use what they got.

Moving from the Schottky Bat54s back to the two non-schottky 1n4148's would require more drive, not less. ? Near as I can tell, those Bat54s diodes were a problem for W5KUB and for nobody else.

Arv's post says to use a T37-6, but both of mine came with T30-6 cores as seen in the picture. The core on the left is a T37-6 and the core on the right is the one shipped with my BitX40 board. Joel