HI After building a BITX20 and a BITX40, it seems that those who are constructing more than one BITX transceivers might be able to increase efficiency by modular construction. Since there are severa

Can somebody familiar with the size and composition of the "used TV balun cores" have a look at http://partsandkits.com/binocular.html and tell me if any of these are suitable replacements? Thanks.

Hi , I was just taking a look at the inductor / transformer details using tap washers. The tap washer I have with me has following dimensions: OD : 15 mm ID: 4.5 mm Are my tap washers ok? if we c

For those with access to the Amidon Iron powder or Ferrite cores these should work for L4 the VFO coil Amidon T-68-2 (red core) 20 uHy = 59 Turns of #26 SWG Amidon t-80-2 (red core) 20 uHy = 60 Turn

hello Arv and friends,        with relationship to adjust the frequency of resonance of the reels, QSL!  mine doubts it is the relationship of turns between primary and secondary to have 50ohms

Chris Not much progress yet on the antenna changeover circuit, mostly due to other more important work schedules (not involving the BITX project).  On my BITX20 I did go back to using a small 5-vol

Hi Some time ago I quietly uploaded a file on a novel way to measure inductance of the coils used in the BITX design. I did not announce this file because I wanted to do more study to insure that th

hi there   can anybody help with details of suppliers of parts list and kit manufacturers in india, usa  or  uk. i am deeply interested in this project.   thank u Do you Yahoo!? Yahoo! Mail A

Look in the Photo Section under W6JFR and you will see my BITX20 with a Huff & Puff type VFO based on EI9GQ's work. This one uses the PIC16F628 versus the original PIC16F84. Look under EI9GQ's websi

FYI Hans-G0UPL and myself have been working over the past few weeks on the design of a simple VFO stabiliser and digital dial circuit that might be applied to the BITX and to other QRP equipment. In

Hello I have my BITX20 working Ok as far as the final. When I bypass the final and whistle loudly into the microphone, the driver puts abt 4V pk to pk into 50 ohms which I suppose is about 300mW as i

Surprise! You've just received a Yahoo! Greeting from "gautam" (fromgautam@...)! To view this greeting card, click on the following Web address at anytime within the next 30 days. http://in.view.gre

Hello, There is a new article about simple frequency counter, at PA2OHH site, "BINARY DECIMAL LED DISPLAY VERSIONS OF THE SIMPLE FREQUENCY COUNTER " 'Probably' suit to your BITX. Click here http://ww

Hi BITX20 Builders, I have just included a section on my website of the BITX20. For those who may be contemplating building a vfo stabilizer based on the EI9GQ design, I have included the source co

Hi all, I found a very easy to use tool to measure the shape of the x-tal filter. http://www.qsl.net/pa2ohh/04audio.htm The programm is small and the only needed hardware is your PC and a cable with

Hi Chris, I am very busy with the QRL on the moment but I hope to put them in the picture box within two weeks. 73's, Ruud _____________________________________________________________________ J

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 : /MODIFICATIONS/Amplifier stages BITX17.doc Uploaded b

Hi, Some time ago I put some pictures in the photobox. Now I have time to say something about them. The pictures shows the shape of my IF-filter 10MHz. They were made with the computer and the pro

[This is from John G0UCP but mistakenly sent to the group owner not the group!]

Dear Editor, This mail is to lodge a very strong protest at the way you've described Amateur Radio (Ham) hobby as being 'faintly embarassing'. I refer to the paragraph on your website: http://www.