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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

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,

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

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

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 &

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

Charles, Where did you post it? Students

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

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

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

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

Hi fellow builders, posting this link for information http://www.wia.org.au/armag/2002/AR_Sept02_Digital_Freq_Display.pdf - its a digital frequency readout using a PIC micro with user definable IF

Hans Summers wrote : As I understand it, the " half -inch' refers to the bore of the water pipe with which they are associated - and includes three-quarter and one-inch as part of the series. A

Hi Charles, what you describe has been used in VK for a while now, described (and used) by Drew Diamond VK3XU - he is a master of this style of homebrewing and has published many articles over the

Very nice pads, applicable to many projects. I use an 8 pin Motorola microcontroller in my Morse Code training device, and this will be great for those projects too. Info on the MCD is on my webpage

BITXers Since the tap washers, faucet washers here in the US, are mylon or similar plastic type material, it would seem that they do not contribute much to the functionality, other that to hold the

Hi I was wondering how to make a pad for the chip then thought use a piece of PCB with a cut through the copper in the centre and then additional cross cuts of the copper to make the lands for the

Farhan Fine on all of this, I have friends in your country who have reported the same before now. Hope you get access soon, Mark G0MGX

Hello, I have uploaded a photo of a two-hole "binocular" ferrite core (see G4DFV album). Ashtar, please can you tell me if this is anything like the TV balun that you have used? My core measures

Farhan Sorry to hear of your problems. I'm sure you are right to fight for the free exchange of information. One possible solution is to use an anonymisation service such