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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

Ola Miguel, I like to see some picts of your super VXO's Miguel. Great coverage with only 3 xtals. Is the output stable over the whole range? Do you use one or more (switchable) coils in series with

Hello I build 3 VXOs called "hipervxos" for 40m, 20, and 10m to use with BITX, They use a classic Colpits oscilattor with 3 parallel xtals and a series inductor (special) and a series variable

Guys I am planning a Huff Puff VFO kit for my 2-chip minimalist VFO see http://www.hanssummers.com/radio/huffpuff/minimalist/2chip/index.htm . I am sure that this would be suitable for use with BITX

Tnx for your reply dear Mike, I did the measurement with a Philips low-budget "world" receiver (with BFO :-) ) connected to a Celeron 266 MHz PC using MixW2.10 and I suspect this radio causing

Impressive Ron, Not a criticism, but I note some products of the VFO some distance from the carrier in the unlocked pic which are not noticable when the HuffPuff is operative due to the other

Dear Troy, Would like to inform you that I included the Huff&Puff circuit into my BITX17 (converted BITX20 for 18.068...18.168 MHz). In my Photobox (PA2RF) you can see 2 pictures of the VFO

I have tried this method and it works well with my non-BITX 5w CW transmitter. My receiver has an RF preamp and a post mixer amplifier. I found that if I grounded both transistor bases during

Those BITX builders who want to have QSK operation without relays might want to look at the web site of Miguel PY2OHH <http://geocities.yahoo.com.br/py2ohh/trx/fullbrkn/fullbrkn.htm> He shows

Troy H&P stabilisation would hold your frequency to within a Hz or two for the long term, thus minimizing even a slow drift after warm up. Hans has come up with several minimalist stabilizer designs

Thanks Arv, I've had the AFU callsign for about ten years and you're the first person to comment on it. I thought it was funny when it was first assigned to me but nobody seemed to share my sense

Now you have the benefit to read for example every day ten (for you new) postings! Often it is better to follow also what happened before, preventing that the same questions are asked more

Troy The BITX has also been used for CW. Several builders have added a center-of-the-filter BFO oscillator that serves both send and receive CW functions. I took the simple way and just added a

Hello all, I just wanted to say what a fine group I think this is. I have not built a BITX (I do mostly CW homebrew projects) but most of the topics here have been pertinet to my homebrewing. My

Hi Ray, Yes, you are right. Just QRP should have been sufficient. In fact 2 Watts represents a lot of electromagnetic RF energy. And if propagation conditions do not let you down a lot can be