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When transmitting only the 4 Mhz (VFO) signal is on base of Q13 . The VFO level is about 1Vpp. The 10 Mhz modulated audio is about 600mVpp at the base of Q12. I can see my 10 Mhz signal at the

The fact that there was no need to change the microphone circuit may be means that also spoken word can be transmitted? With SSB, I made many QSO's. My antenne is a sloping dipole, I found out that

Hello Rahul and friends I built 6 different frequency (3, 3.58, 4.192, 7.151, 14.318 and 18.432MHz) VXOs all are very stable...I will update my homepage with a description of each one... when I

Hello Ron I will post the pictures and make a description of the coil ... I use a fixed coil... one or two in series. The main problem is the coil... when you try to change with other who has the

Dear BITX-radiofriends, Just made my first PSK31 qso on 18.102 MHz with the homebrewed BITX17 with Arthur UX1HW in Ukraine. Only 5 Watts RF out from an IRF510 and an end fed half wavelength wire

Hi Folks, I was browsing other newsgroups this morning, enjoying my new broadband connection when I came across a post referring to http://www.rfmicrowave.it They have just about everything that I

Hi! Have posted a file with few mods that I have incorporated. It is possible your version may not require them. I needed slightly higher IF gain mainly because of poor quality devices and low

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20 group. File : /BITX 20 V1,2&3 /BITXmod.pdf Uploaded by :

Hi! Arv I did make a layout incorporating new changes. Unfortunately only legal software with me is EasyPC dos bought in 90s for all it was worth then , it still proves to be the work horse. If I

Rahul Has anybody drawn up an updated schematic to show the changes from Farhan's original circuit? If available, this might help others upgrade their older BITX20 units, and could help new

Dear Arv and Ruud, Really appreciate your responses ! Yes, I am still puzzled by the results of yesterday. Will write some extra notes on my homepage to celebrate this " First Contact on 17 " event.

Hi Ron, Congratulations with your first QSO! You experience the same excitement as I did with only 5 watt digital CW on 20 meters. This is really amateur radio! Lots of fun. 73 Ruud PE2BS

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20 group. File : /BITX 20 V1,2&3 /palayout.pdf Uploaded by :

Hi! Many BITX are on air on 20 now in VU. In my city we have made 4 nos. 2 sets were made using the Ver 2 PCB I posted in group earlier. We faced a minor problem as the local BC547s were not

Hi miguel, i am doing an experiment on 12MHz xtal VXO, i could get 35kHz or more range to it, the only thing is i use ony 1 xtal, getting more range, means getting more drift. here's the details for

Ron Congratulations on your joining the "BITX-On-The-Air" group. Your web page looks quite interesting as well. I liked the morse sound effects between pages. Did you use the original H&P

Great Ron, congrats! Well done! It's the good of home-brew and of QRP! 72 Alex I0SKK -----Messaggio originale----- Da: BITX20@... [mailto:BITX20@...]Per conto

new ISP, I can't post to the group but receiving ok. just a posting test sorry. Mike W, G8NXD

Dear BITX-homebrew-gents, This afternoon, I made my first QSO on 17m with the BITX17 ! I am really surprised. My qrp RTTY signal from the west of Holland reached Greece SV with RST 559. I used

Dear Miguel, Hi! This all is very interesting. I feel some correction is in order for 80mts range mentioned. But what I am more interested is the 18mhz tuning you mention, it makes making a 20mtr