Clock Radio from RF

[KG4CGC]

http://www.youtube.com/watch?v=LQT01-OA89k
Cool homemade parts. Runs off of RF through crystal set.

[WØTKX]

That tickles me whiskers... :giggity:

http://www.youtube.com/watch?v=5wriVyM3ecw

[youtube:wsk4qqlf]http://www.youtube.com/watch?v=5wriVyM3ecw[/youtube:wsk4qqlf]

[KG4CGC]

That too was tisker whickling.

[W2NAP]

nice vid

[WØTKX]

Played with crystal and regenerative receivers a lot as a kid... good times. :clap:

Here's some great linkies:

The Xtal Set Society (http://www.midnightscience.com/index.html)

JFET "Crystal" Set (http://www.electronics-lab.com/projects/rf/029/index.html)

Shortwave Radio Kit, Electronic "Lab" Style, Under $20! (http://www.amazon.com/Elenco-MX9015SW-Short-Wave-Radio/dp/B0009Z3JQI)

[KG4CGC]

http://i25.photobucket.com/albums/c79/bebop5/FireShotcapture011-CrystalRadioCirc.png

[WØTKX]

OIC... an excuse for a short antenna? :neener: :giggity:

[KG4CGC]

Actually, I want to build the tuning section for LW. I was wondering though if I would have to choose a transistor more suited to lower frequencies. Not sure. Of course, I would indeed use a giant outdoor antenna. I don't see any other way around that. LOL!

[WØTKX]

Got $26 for all the options? :yes:

http://jacksonharbor.home.att.net/lfconv5a.jpg

Jackson Harbor LF Converter Kit (http://jacksonharbor.home.att.net/lfconv.htm)

Jackson Harbor LF Converter ~ EHam Review (http://www.eham.net/reviews/detail/5270)

[KG4CGC]

26? You mean with shipping too?

[WØTKX]

Yessir, checkout the linky... :cheers:

[KG4CGC]

Well I did but I guess I'm being dense and missing something.

[KG4CGC]

All I'm seeing is a $14 kit with a $3 add on. Then $3 shipping.
One of us is math wrong.

[WØTKX]

Eh? "sallright... :neener:


# price is $14 for basic kit (4 AND 10 MHz crystals, no printed documentation)

# add $3 for additional filter components designed by Jack Smith in his review

# 11/10/2009: note that the extra filter components now have FT37-61 cores and smaller magnet wire
versus the original FT50-61 and #22 wire add $3 for postage/handling in USA

# add $6 for postage/handling worldwide


14+3+3+6=26 Duh, I added the worldwide shipping. So it's only $20.

:giggity:

[KG4CGC]

:neener: :agree:

[KG4CGC]

So far I've wound about 360 feet of 30 ga. wire on a 3 dia. tube and it's only covered 5 inches. Will switch to 24 gauge next and continue. It's tedious but it looks good.

[WØTKX]

http://www.midnightscience.com/ob1b-new.gif

[N5RLR]

Oatbox-sexy. :mrgreen:

[KG4CGC]

430' on the coil. Imma gonna stop there for now. Next the RF amp. I should really double check when I make a parts list. any suggestions on constructing a 22? resistor? Doesn't sound like much but I like to start with the base values before I go all crazy 'sperimentin'.

[WØTKX]

Try mechanical pencil leads... Got any carbon rods?

Maybe some resistance wire out of a car?

[KG4CGC]

Try mechanical pencil leads... Got any carbon rods?

Maybe some resistance wire out of a car?
Believe it. I've been testing the ? of quite a few things. I figure something is bound to work.
Gotta go to bed early though, nurr :(
I'll just pick it up tomorrow. A couple or three crappy old speaker coils might get me there :)

[N5RLR]

Try mechanical pencil leads... Got any carbon rods?

Maybe some resistance wire out of a car?
Series/parallel some junquebox resistors. A little over the 22? value shouldn't hurt. Or, you might luck out and get it bang-on. :idea:

[KG4CGC]

Twisted a pair of 47 ? together. Close enough!

[KG4CGC]

Suggestions for making a 500? pot? Already thought about two 1K's joined at the shaft and paralleled.
I could just use a 1K and series it with a 25? pot and use the 25 for fine tuning the 1K since the 1K wouldn't be very forgiving.

[KG4CGC]

http://www.crystalradio.net/crystalplans/

[KG4CGC]

Got $26 for all the options? :yes:

http://jacksonharbor.home.att.net/lfconv5a.jpg

Jackson Harbor LF Converter Kit (http://jacksonharbor.home.att.net/lfconv.htm)

Jackson Harbor LF Converter ~ EHam Review (http://www.eham.net/reviews/detail/5270)
It just came in today!
I want to finish this other project first. I'm about to test the amp/regen section as an amp. It must be shielded but for test purposes I'm jus going to place it in a cardboard tube wrapped in extruded aluminum.

[WØTKX]

Frigid Legumes! That should be fun to build.

[KG4CGC]

Frigid is spot on :giggity:

[N5RLR]

Got $26 for all the options? :yes:

http://jacksonharbor.home.att.net/lfconv5a.jpg
Isn't the NE602 s'pozed to be really scarce? [I know, it's been superseded by the NE612]. :geek

[KG4CGC]

I dunno. I have at least 2 in the house from my Ramsey kit building days of the mid 90's.
I was just looking at the shortwave kit I got from them in 95 and was wondering how I would rebuild the front end for AMBCB.

[KG4CGC]

http://www.crystalradio.net/crystalsets/bfo/index.shtml

[KG4CGC]

http://www.crystalradio.net/cal/indcal2.shtml

[KG4CGC]

http://www.educypedia.be/electronics/circuitsrfcrystal.htm