开云体育

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

--- In BITX20@..., "ik1zyw" <pcravero@a...> wrote: It's me again. > Has anyone attempted to list all BITX20 components? I haven't found > any link on Ashan's page. Here is my attempt at

...in which G0UPL travels to his local hardware store to further investigate the nature of the infamous tap washers, and in particular the differences between ordinary and "delta" washers. Samples

for the last 48 hours, groups.yahoo.com has been blocked out by the two major bandwidth providers to india. most of my internet accounts belong to isps that in turn take their bandwidth from either

Hi I have just posted a block diagram of the BITX - I hope I have correctly identified all the section of the main schematic diagram. Let me know of any errors. This will be used as part of a

Yes, true - I found that Rapid Electronics sell a very useful resistor variety pack containing 1000 resistors in 63 values from 4.7ohms to 10M. The number of each varies from 5 to 30 depending how

Hi I uploaded my BITX20 pictures into the photographs section http://photos.groups.yahoo.com/group/BITX20/lst I also re-organised in there a little, so that the photos which were at the top level

Hi All, Just to clarify, the Delta Washers I mentioned in the earlier post are shaped more like a standard Torroid a little bigger than a T 50 and not as big as a T68 so I guess around a T55????? A

Hi After reding over today's posts...here are a couple of thoughts and comments: 1) The manufacturer and model number for the faucet washer used in BITX20 coils is probably much ado about a

Very nice PCB, I'm certainly enjoying these photos :-) Thanks to all for your interesting posts :-) Being somewhat of a photographer, I always say "One can never be too rich, too thin, or have too

Hello Fello wBuilders, think I stuffed up a previous message post - anyway, have posted a photo of my humble efforts at kitchen sink PCB making for the BITX20 IF Amp - its in the VK3BFA folder. Any

Both those circuits will work fine, as will most any other QRP amp circuit. A broadbanded circuit is easier to build and use because it requires no tune-up and is less likely to have a parasitic

The only reason(s) I can think of _not_ to make 'em float in the air is that this technique has the potential to make the circuit sensitive to microphonics. And in a high-vibration or high-shock

What is a "delta" tap washer? I'd be careful... When I bought my tap washers there were "delta" washers and ordinary ones. But I don't recall what the difference was. Anyone know? I got my