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Hi Ruud, as I remember, you asked for a solution in the circuit, by using other resistors. I kept the circuit 'original' and added very small transformers, pictures can be seen in the BITX17 Photos

Thanks for the good info dear Allison, Yes, in the meantime I discovered MOSFET IRF's are not most favourable candidates for a 6 m PA. The 2SC Japanes transistors are more common and most likely

Allison, & others... Since the time constant in an H&P (Huff and Puff) stabilizer is usually much longer than that of a traditional PLL, a PIC-based H&P design might be quite easy to implement. I

Within the base ladder filter topology there are subgoups of type. They can designed as minimum loss, butterworth, linear phase or Chebychev not unlike LC filters. Each has it's differences

--- In BITX20@..., Jim Strohm <jstrohm@e...> wrote: > > On Jul 10, 2005, at 7:04 AM, Ashhar Farhan wrote: > > > while PLL chips are difficult to find, the 16F84 or the 16F628 are > >

Hi Paul and Max, Thanks for your info about the design of a ladderfilter. The ladderfilter was subject in this group before. Building the BITX20 I made a shape of the ladderfilter with the program

Yes Paolo, I'm a memeber of this list and just for this reason I discovered this good RTX and decided to show to other italian Hams... hi! Best 73 Alex I0SKK -----Messaggio originale----- Da:

de 4N1ZM I added older easier for understanding version of ladder filter desingn program in file section under 4N1ZM folder. design. build ARRL

de 4N1ZM There is two programs and alternative aproach to ladder filter design. Since altavista translation can overcame language bariers it is possible to check this link through systran

Dear Friends I wish to let you know that VUQRP will be making "PCB Making kit" available to VU hams who are interested in homebrewing. The price of the kits will be around Rs.325/- plus postage

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