Sam & other BITXers Your measurements explain my results then. Instead of tap/faucet washers I used 1/4 inch slices cut from "1/2 inch" PVC pipe (the schedule-40 or medium-thick-wall type). These

That's what I do too, when I need to. I use firm pressure on one of those cheap orange plastic "craft" knives. You can produce a nice thin cut with this method. The LM386 in the BITX20 I just mounted

An easier method to make a pad for non-SMD IC's is to use 0.1" Veroboard instead of plain copper laminate. Then only one saw/knife cut is required. KISS? Duncan G4DFV

A very nice readout. But for anyone wanting something *really* simple, have a look at my 2-chip binary readout counter http://www.hanssummers.com/radio/sfreq/index.htm . Also see my BITX20 in

Charles, Where did you post it? Students

And an even easier -- yet vastly more expensive -- method is to use one of the etched adapter boards that brings out the pins from a surface-mount chip to 0.1-in spacing pads. SMD chips can be

Hi all Looking for some help here. Testing the RX today, AF amp clearly OK, the simple tests in the text work out fine i.e. Touch base Q4 static, Q3 more static, Q2 less static. Trimmers with L1,2 &

That wire is large enough that it should not have fractured within its enamel coating. For L1 - 3, an ohmmeter will confirm continuity. For T1 and T3 -- this is worth asking -- did you use

This is really Cool, thanks very much:-) Regards, John ============================================= email: k5jhf@... photos: http://photos.yahoo.com/k5jhf@... files:

BITX'ers, DEADLINE: 12:00 UTC THURSDAY 01-JUL-04 (TOMORROW!) Paolo, Farhan and myself are investigating the possibility of a complete kit of all parts for the project, including resistors,

Hello, I just measured the resonance frequency of ten 10 MHz crystals. I found a set of four within 30 Hz and another set of four within 45 Hz. How does this compare to other peoples

found a How do you do that? Figure out the shape that is? Tnx N3Ted

Hi, I build some parts of the transceiver and tested every part individualy. The LF parts works fine (a pitty the schematic is not corrected with the voltage/output of the lm386). If I add a sinus

the correct schmatics are now at www.phonestack.com/farhan. i have run out of bandwidth on http://farhan.net.co.nr. ther is no way i can access those files now. just before i ran out of bandwidth, i

crystal the shape is easy to figure out if you already know the crystal parameters. the crystal parameters are easier to measure now thanks to the G3UUR method. i have outlined it at

Thanks for the additional information. I checked again http://www.phonestack.com/farhan/bitx.html and found out that point 5 and 6 are stil wrong (not in accordance with the data sheet, as noticed

- farhan wrote: i am convinced that we need to add detailed test measurements for the transceiver on the site. i have most of them in my log book. i will post them soon. I would welcome test

Here are my measurements in ascending order: 9,994,677 9,994,704 9,994,733 9,994,747 9,994,799 0 9,994,811 +12 9,994,821 +22 9,994,829 +30 9,994,874 9,994,887 You can see the chosen 4,

Hi All I rather agree with Mark - I have done a lotof construction in the past and the absence of such info takes a long time ofsearching for a fault. AND It will make great testing and fault

Please I do not have the 10MHz crystals to make the filter, but I have 5 pieces of 8MHz crystals with this 8MHz crystals is possible to make the filter with new values of resistor and capacitor?And