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Hi Chris, Thanks for your comment. When the filter is part of the new BITX80/20 I will have to match the filter in the trcvr again. With you I wonder how it will be, special because the filter is

Very nice shape, nice experiment too. Like to mentioned, matching is important. I wonder how the shape looks when it is part of the BITX but I am sure you will add it. Chris. the experiments. the

Hi fellow BITX-ers, About one or two months ago I promised to report of my ladder filter experiment on 9MHz. I just dropped the files with shape-pictures in the Files box. See the folder "Ladder

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 : /Ladder Crystal Filter Design /X-tal 9 MHz.xls

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 : /EGR/BITX_rev_B.zip Uploaded by : eternalesquire

Rob, I just compared the emitter circuits with the originals. Yup, you called it. I will fix this and put this out in Rev B asap. The Eternal Squire

Hi Arv & Ron, It appears that the bidirectional amplifiers cannot be biased correctly, with those 100 nf in series with the emitters. I haven't looked, but I suspect they are in parallel with the

Hi, Another piece of useful advice re VFO tuning. I have found that coupling the VFO capacitor to the load side of a plastic planetary gear drive kit (used in toy boats and aircraft) provides a

Hi, All the graphic formats are supported here, those are no problem. I specifically do not run the "MS Office Suite" as they are klunky and slow never minding a security issue. Got the files and

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 : /KB1GMX/PIN-ATT1.jpg Uploaded by : ajparent1

I have put the revised gifs out at http://www.ham-stuff.net/w5rcm/BITX/ for those who want them. Squire, I've got no problem if you want to roll these up into your zip file. Go for it! -- 72, Ron -

Hi, I'm sending my response as a group letter. I just recently uploaded a new .ZIP with the A revision of the engineering diagrams, as EGR\BITX_rev_A Allison, I meant to say that the format is

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 : /EGR/BITX_rev_A.zip Uploaded by : eternalesquire

Then both of you did good work!

Hey Eternal Squire, If you make any changes to your bmps, let me know and I'll remake the gifs. -- 72, Ron - W5RCM / ZS1MCD Austin TX / Hermanus ZA

Hi! Ron! Thanks for all the efforts . The automated system appears to have some flaws. My observations 1) Zobel at output pin 5 of 386 has cap marked 100pf this appers to be an error, similarly

I don't get credit for that... eternalsquire did the work...I just converted his BMPs to GIFs. -- 72, Ron - W5RCM / ZS1MCD Austin TX / Hermanus ZA

Ron W5RCM Very good job on the schematics. This should also help a lot for those who want to do their BITX as modules. Thanks, Arv K7HKL

Very nice job, Eternal Squire! I have converted these to GIF format... you can grab them all from http://www.ham-stuff.net/w5rcm/BITX/ -- 72, Ron - W5RCM / ZS1MCD Austin TX / Hermanus ZA

Hello, I have it on paper and in the chassis. It's still pending getting it to an electronic form. Basic design isa fairly stock PI form and uses 4 diodes to attain about 40-45db of attenuation.