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http://www.golddredgervideo.com/kc0wox/bitxver3new/newmanual.htm Best regards, Patrick, ON4CLQ. [Non-text portions of this message have been removed]

BITX20hi, I am trying to construct my bitx20 v3,and I cannot find the insulated copper wire of the same gauge in my local market, can any one provide me the inductance value of the coils used in

Thank you ARV for your info! RON

Ron Power with and without the PA3BWI mods should not be different by more than 1 or 2 percent. If more than that I would suspect that your IRF510's may have been oscillating on signal peaks and

I have a few rolls of what looks like 30ga ribbon cable. It was used in hard drives. I've posted pictures of it in the past but can't find them. It's my wire of choice for torroids. It was expensive

After adding 1K resistor between drains Q18 and Q19 and 220 ohm across pri t3 noticed lower pwr. Will adding .1 mf increase drive like stated for Bitx17a? Before experimenting will this same value

Add to all this -- twist your windings and it makes it a lot easier to wind. 73 Jim N6OTQ? [Non-text portions of this message have been removed]

Ahem! elaborating for Sandeep.. Twisted pairs have lesser capacitance with the next turn or layer than untwisted pairs of wires AFAIK! Twisted pairs in balanced configuration also reduces the stray

TWIST FOR CAPACITANCE... -- -- Due to ongoing technological advancement, many of electronic products become obsolete within a very short period of time, creating a large surplus of unwanted

Did you test your crystal in a stand alone oscillator ? The only way to see what the original Freq is . The circuit ( bfo ) is maybe oscillating by himself stronger then the signal from your crystal

A good question. Why twist the wires together in the first place? For the same reason as one makes coaxial cable or ladder line: to provide a uniform impedance match from one end of the wires to

Hi folks, my first post to the group, I'm looking forward to constructing this great little transceiver. Although I'm an experienced constructor sometimes I do get my head in a mess when it comes to

I meant to say the 15pf in parallel with the variable cap. I put in a 22pf cap. I tested the 15pf and discovered it is a 150pf. It is one of those little plastic NPO's with the markings illegible.

I think I found the problem, or at least part of it. I changed the 15pf capacitor in series with the variable cap and replaced it with a 22pf. I now have almost 2KC of tuning. I can actually hear

I'd really be suspicious of having a wrong value capacitor in the BFO circuit. Almost anything else would cause a small difference, not the big change you have. Leonard

Jerry I wonder if your xtal\s came with thie kit or you sourced them some where else? Try swaping an xtal from filter with the bfo xtal. Could the xtals be series resonant type? rather than

Jerry Something really strange going on there. Do you have a different crystal in the same frequency range that could be substituted into the circuit? Alternatively you might be able to build up a

Arvid I wound a 37-6 with fifty turns as per the calculator, worse. I shorted the crystal and found I had moved lower to 6190. from the 8200. But still had the 135 KC tunable range with the crystal

Jerry K5LRU That indicates that your BFO oscillator should be tunable. Next step would be to check capacitor and inductor values to make it tune across the crystal frequency. You can change the

The crystal brand is KDS. I took your advice Arv and shorted the crystal out and the frequency tuned from 8104. MHz to 8239. Mhz 105 KC range. But way lower than the 9995. Mhz area. Jerry K5LRU