HI All, I've been working on putting together another BITX40. I didn't leave myself enough room in the old lashup for mods and additions. This time I decided to use SMA connectors for all the RF, V

does any body know how to find POSITIVE temp coefficient trimmer caps suitable for the VFO ???, e.g. who makes them. I would like to parallel one with a negative temp coefficient trimmer in my VFO to

Hi all, I put my board back in the Bitx40 and took more measurements. Again I can get the 12 MHz with audio modulation on transmit thru the xtal filter and thru the amp to C51 at 200 mv,  Also get it

What is the part number for diodes D6 & D7 ? -- David Martin - NA1MH - Mountain Home, Ar. ----------------------------------------- Everybody complains

I just released Raduino v1.16, download it from https://github.com/amunters/bitx40 New in v1.16: CW SPOT button for zero beating Connect a momentary pushbutton to Arduino pin D5. A SPOT tone will be h

Is there a circuit for the BITX40v3 AS the circuit I have of Bitx40 with DDS  has the Balanced modulator Pot and diodes still incit the Bitx40v3 does not have the balance pot or diodes? Bryan VK7KWB E

Just received my Mega 2560 Pro (embed) CH340G in the mail. Was happy until I lined it up with the W8TEE board and it don't fit. 1 whole row of pins out. Looks like I have ordered the wrong one

since I installed a swr meter kit i get this message randomly when I ptt the only thing the swr has to do with the pcb is a bypass with the antenna circuit. Swr kit has a switch and when it is turned

I just finished the CW mods and I am seeing the same issue that John, WA2FZW had.   1) When the press PTT in LSB mode the Rig goes into TX and I am getting full power out on voice peaks but the PTT is

New Version of the sketch available, Now with images, diagrams and adjusting tips, check out the new features. v1.3 Fix for labels on second line not matching

has anyone used bd139 as power amplifier? how does it perform at 14 mhz and beyond?

I need a programming guru to look at my code and suggest the best way to convert tIhe numeric data to ASCII. I am awaiting Dr Jack's book so I can learn the syntax. Right now I am in deepest Africa cr

BITX QSO Night, Sunday, July 2, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters! To participate, call CQ BITX

Hi: I am doing a scratch-built BITX, shown below.  The receive side just started working - no PA block yet. If anyone with a trained eye can see obvious construction problems so far please let me know

BITX QSO Night, Sunday, June 25, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters! To participate, call CQ BITX

Thought you all might be interested in how my BitX-40 did during Field Day. Operating from a site in Essex County, NJ with an elevation of about 500 feet, and using a couple of different dipoles (one

Everything seems to be working but sometimes my peak power around 7 W and then sometimes it's around three watts and then I'll go back up to seven watts doesn't seem to be heat related.  Any my ideas

i have just ordered a bitx40 from india i think has any body had a kit held up in uk customs and had a bill for import vat terry gm4dso

Hi All: I received my VFO PCb's today they look great, In the process of gathering the for the build, I found the type II dds is pricey compared to the type I dds,. I recent post from W8TEE stated tha

If you enjoy using Allard PE1NWL's great Bitx40 software, show your appreciation by going to https://github.com/amunters/bitx40  and clicking on the "Donate" button to make a small donation.