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Michael If you put an ohmmeter across the toroid core you should find that the core itself has quite high DC resistance. For this reason I would suspect that the problem is more likely to be shorting

The bitx40 has two cascaded relays. One is the PTT activated one and the other is activated from the first. These relays on my board "VRS.." have some <7ms according to the data sheet. So two relays

I re-soldered the 6 "legs" but the problem is still there but less sensitive to bumps. I also added some glue to the toroid to make it more mechanically sound. I am guessing the twists and turns may

Hi guys, I have my Bitx40 built and receiving. ?For some reason I think the final got whacked or it was shipped with a defective final so I have a few of those coming in. ?To date, mine has never

I will be adding Rca phono pannel jack to use ptt switch ?to key up Amertron amp. I have tested ?so far maxium output near 100 waltsPeaks ?with ?Bitx40 measure at 8 watts drive at 100% audio

Thank you, Allard, this works flawlessly. Greg

Nick, thanks for the link! ? -- John - WA2FZW

Thanks for your reply Keith, yes to all of that.? My issue was not downloading the proper file to compile.? When I downloaded the .zip all went well. Al Duncan VE3RRD pointed me to the information

Did you use 1/4" tubing like that used in the url? If so, you can double the efficiency by going to 3/4" pipe of the same length as the tubing. Vince. -- Michigan VHF Corp. http://www.nobucks.net/

If interested you can find details here of the loop here: http://ac9lf.blogspot.com/2017/06/qrp-magnetic-loop-antenna-for-40-meters.html (

Thanks for being my first BITX to BITX Tom. Same conditions on this end as well. You started out a good 56, 57 here and then slid down into the noise. Antenna here is a Butternut vertical and also

Hi all, I found a simple fix for my receive noise. I used an antenna tuner! Thanks for all the good suggestions from the group. As well as changing my Bitx40 enclosure, I had changed my antenna. I

Dr. Jack, W8TEE, Thanks for the reply and clarifications. I have been reading and scouring thru each and every email as they pop up on this group and the soft group, its not like drinking from a

Thought I would share this one. Used some cheap junk box spool of speaker wire, a banana connector and some plastic insulators with a case mount so-239. ? ?Originally my brother W8FI made one like

These are very interesting projects all. Take a look. john AD5YE

I have put the details of my TFT VFO + BFO on blog and github. It is a design where standard arduino Mega 2560 is used. The 2.4 inch TFT sits right on top and a specially designed board for Si5351 etc

What Vince asked: How big? I'm just finishing up a 2 loop 4' one. Not sure how well it's going to perform on 40, but that's as big as I can get into the attic. Have to finish up the feed mechanism.

I'm selling the board for $7.50 pp. I have a bunch left as I think my club will do a build of it. I have uploaded a new assembly manual, schematic, and source code in the group's Files section. Since

worked tonight on 7.277 @ 7 watts into OCFD Started at app. 0000 UTC? KI4PSR Dave 55 KC1FSZ Bruce 56 WA1UQO Armand was 55 then QSB took him out VE3RRD Al 59 VE3RDQ Jack 55 N1PMA ?Craig 55 heard but

Worked local stations VE3THR and VE3RDQ. Also worked KC1FSZ N1PMA W0OIC KD9CKB Heard KM4WII and a couple more that I couldn't work. Not much QRN tonight for a change.