Boy you guys do remember the good old days when a tube would fix 80% of the
radios and TVs of the day. I will have to say that I too had a crystal radio
that had the toilet paper tube coil. At the tender age of about 6 or 7, I
lost the crystal. BUT, not to fear, I remember reading in my "All About
Books" about those new things called transistors. They were made of the same
stuff that the crystal was... Soooo, I made my first transistor radio.
Depending on how I configured the E-B-C leads across the place where the
crystal went, got me different stations. Yes, the good old days...
Boy the trip down memory lane... Just glad I didn't make a wrong turn...
 
        Regards,
        Scott Decker

        AKA: PadMasterson
        Mentor Design Supervisor, Portland
        7245 NW Evergreen Pkwy., Suite 100, Hillsboro OR 97124
        (503)531-2050 ext. 1820 FAX: (503)531-2051
        [log in to unmask] <mailto:[log in to unmask]>
<mailto:[log in to unmask] <mailto:[log in to unmask]> >
         Tyco Design
        Formerly Praegitzer Design, The Fine Line in Printed Circuits



        -----Original Message-----
        From:   Wanner Bernhard [SMTP:[log in to unmask]]
        Sent:   Tuesday, January 11, 2000 12:36 AM
        To:     [log in to unmask]
        Subject:        [DC] AW: [DC] Reference Designators

        ... good, old time! 

        -----Ursprüngliche Nachricht----- 
        Von:    Bob Landman [SMTP:[log in to unmask]] 
        Gesendet am:    Montag, 10. Januar 2000 21:29 
        An:     [log in to unmask] 
        Betreff:        Re: [DC] Reference Designators 

        Yes, and the crystal was the rock crystal called galena (orginally
but 
        later germanium and then silicon the first hermetic diodes used a
cat 
        whisker point contact that emulated the old crystal radio sets.  I 
        recall building a Phillmore Jr. way back when and winding my own
coil 
        too.  Reception was pretty darn good (AM stations really pump pump 
        ouit the power). 

        These days, we use the "D" designation instead.  yes, K stands for 
        coil, more specifically a relay coil.  K on a diode is of course the

        Kathode (though why it is spelled that way eludes me - maybe it's a 
        German derivation as in Kathode Ray tube but then the Germans call 
        CRTs Braun tubes for the scientist who invented them). 

        Bob Landman