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Hi, following Arv Evans's useful tips I would like to share with you how I built a non-conductive screwdriver to regulate capacitor trimmers. A quick glance at the BITX20 schematic did not reveal any

Hi Arv, I'm thinking of building a 40m version of the BITX20. As Ashhar mentions in one of his earlier mails, that is the band more popular here in India. Could you please guide me on the

I'd like to remind all that ScotchBrite is a relatively non-reactive abrasive matrix that works well with reasonably non-reactive chemicals. It's worth trying with Tarn-X or other "tarnish-removing"

Brasso is another cleaner that I have used in the past. Does an excellent job! http://www.kilianhardware.com/brasso.html http://www.stanleylondon.com/brasso.htm 73 de Baino wrote: Tarn-X.

Would those be "Blue - blue, blue suede shoes?" Theo

Thanks a million, Monty, Great job. And thanks to Arv Evans for sharing this circuit :-) Regards, John ============================================= email: k5jhf@... photos:

I'd like to suggest the use of a copper/silver cleaner, such as Tarn-X. I don't know what would be similar across the pond or in other parts of the world. I just pour a little bit of Tarn-X on a

Hi Can I also suggest that where the components are to be placed that the PCB pad is tinned and where earth connections are to be made that area too is tinned, as it ensures a good joint and the joint

Hi PC Board material that is stored for some time usually takes on a layer of oxidation that hinders soldering components to its surface. In the past I have routinely used sandpaper to remove this

Thanks, Arv. 73s ----- Bharat D Balsavar VU2BDX

Very Nice, thanks very much :-) Regards, John ============================================= email: k5jhf@... photos: http://photos.yahoo.com/k5jhf@... files:

Hi Since Farhan's stated original intent in designing the BITX20 was to provide an inexpensive transceiver, maybe it would be appropriate to show BITX builders an inexpensive way to measure unmarked

Has anyone measured the Q of the toriods? I wondered whether it mattered too much provided the winding details were observed. However care has to be taken with the coating materials. There is an

Bharat The turns on that coil were sloppy because I got tired of winding them. There are 150 turns of #42 wire on that coil. While it does work at about the intended inductance I would probably be

Hi, This is indeed a good idea. I have a question - basic becuse I'm very new to this field! I noticed that some of the turns are closely wound while some are not. How does this affect the

OK, those are cute. And way cool, ESPECIALLY the parallel LC config that uses the cap's legs for termination and mounting. I love this place. Jim N6OTQ

Hi In converting the BITX20 design for building my BITX40 transceiver I found myself 'experimenting' with several different sets of air-core toroid inductors. Soldering, removing, & re-soldering

Hans When working with really small wire (ie. you don't have anything better to work with!) try twisting two or even three conductors together and use this as one wire to wind your toroid coils.

Nice one Arv! Now we're on the subject I'll share my own method and experiences in case it helps anyone. I don't have available nice new spools of wire labelled 28 or 32 swg. I do have a junk

Hi All What a great idea ... wish I had thought of it my self -- a bit more control than using an electric drill !! Charles G4VSZ