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MODERATOR NOTE: This message appears to be Spam - however Preethi Nair has been a member since 27-Oct-04 and in that time has only made three postings, the first two of which were radio related.

How about a PIC based Huff & Puff stabilized VFO that could also display the frequency? Arv K7HKL _._

To drive the input of the mosfet at 6M you will have to use very different networks so the input capacitance can be absorbed into the network. Same would have to be done for output. Major redesign

That is a good starting point but I'd add much has been published since then on building crystal filters. Using the series ladder design and the right constants you can build USB and LSB filters as

That's was a good article however there have been more written since. The ARRL publication Experimental Methods In RF design has a far more complete (for one place) treatment and a complete list of

LET ME TRY AGAIN SOMETHING HAPPENED TO FIRST MSG THOSE OF YOU WHO ARE INTERESTED IN FILTER DESIGN PLEASE CHECK THIS SITE. www.aade.com/filter32/dishal.htm THE AUTHOR, JOHN PIVNICHY, WROTE AN

... have different shapes. shunt is used for Lsb series for usb. enjoy! PAUL DAULTON PS HIT WRONG KEY AND SENT BEFORE MSG FINISHED

THOSE INTERESTED IN FILTR DESIGN PLEASE CHECK OUT THIS SITE www.aade.com/filter32/dishal.htm included in this site is a link to a filter analysis program on the aade site. the author of this, John

Yes, Mr Farhan stated it as so. Minor problem. It is important to those building to avoid runing a part. Found it! FYI: I have one operational with many mods but not build using a PCB. The

I do not speak Dutch so translation may be needed. One things I note is that the balanced modulator is not terminated for AF of the RF side (going to the IF) and marginal bypass for RF at the audio

You are sure? I don't know, but if it is, what a problem! You can try my "manual overlay". It is located in the group files section, here:

One possible solution is terminate the filter at 200ohms and use a 4:1 balun at each end. That yeilds a 50ohm interface to the amplifiers and allows a filter at a more reasonable impedence. FYI: you

That is indeed true but in practice transistors like the 2n3904 and 2n/pn2222A easily perfom to 20+ mhz.

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I have found that a one or possibly two coats of nail polish (sometimes called nail varnish) of the clear color works well. Allison KB1GMX the coils is helpful. by sharpe part

I build for VHF so most of the PA problems have not been noted. The first model I built was fairly close to basic BITX-20 save for no power amp. I used Ferrite (FT37-43) torrids as I have them.

Ordered one and got it. Two problems: The board pattern is on the wrong side (pattern is on top not bottom.) To use it (I may not) the parts must be placed on foil side! No information on parts

Hi! All Recent Comments by Farhan on a modified BITX20 got me thinking. One of the suggestions was increasing the Rx gain. I too had encountred low gain due to poor quality devices used by me. I

Hi! To be safe, a layer of plumbers PTFE tape on balun before winding the coils is helpful. 73 Rahul VU3WJM Steve Hartley <g0fuw@...> wrote: Ashhar and freinds I have solved my

Ashhar and freinds I have solved my balun core problem. As you guessed, it was caused by sharpe edges inside the core. I small file and emery paper removed them and windings now well isolated from