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Regenerative Radios (Again!)

Discussion in 'Electronic Basics' started by Dave.H, Mar 15, 2008.

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  1. Dave.H

    Dave.H Guest

    I've found a suitable regen radio circuit that only runs off 12
    volts. I've already decided to buy a regen radio using a #30 tube off
    Dave Schmarder, but the fun is in building them. The only problem is
    the 2.5 mH RFC, I can get a 27 mH unit off Dave's web store, is there
    any reason to think that would work?

    Radio Page (schematic's at the bottom) http://www.schmarder.com/radios/tube/1-12af6.htm
     
  2. Tim Wescott

    Tim Wescott Guest

    Mouser, DigiKey and possibly Antique Radio Supply (www.tubesandmore.com)
    should all have something that'll work. Even surplus places like All
    Electronics and MP Jones & Associates may be of help.

    --
    Tim Wescott
    Control systems and communications consulting
    http://www.wescottdesign.com

    Need to learn how to apply control theory in your embedded system?
    "Applied Control Theory for Embedded Systems" by Tim Wescott
    Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
     
  3. Dave.H

    Dave.H Guest

    Found a 2.5mH choke at AES Cat # P-C1535B
     
  4. Dave.H

    Dave.H Guest

    What type gauge wire should I use SWG or AWG?
     
  5. Dave.H

    Dave.H Guest


    How much feet of wire would I need for each coil? I need to know this
    so I can buy the litz from Dave Schmarder.
     
  6. Dave.H

    Dave.H Guest

    Could I use 30 gauge silver plated insulated kynar wire for the non
    litz coils? I can get this from the 1N34A.com site too.
     
  7. Do the arithmetic. Pi * Coil diameter * turns count gives wire length.
    Litz wire is nasty to terminate, so I wouldn't bother. The difference
    between litz and plain old magnet wire might not even be observable in
    this application.
     
  8. Dave.H

    Dave.H Guest


    I didn't think so. I wasn't to keen in using litz wire. Magnet wire
    is my preference. I do not know what Pi * Coil diameter is.
     
  9. Dave.H

    Dave.H Guest

    Since I can't find 30 gauge wire for the two smaller coils, I will
    probably use 28 gauge. I'm assuming 200 feet is more than I need (AES
    sells the wire in 200 foot spools.)
     
  10. Mike Silva

    Mike Silva Guest

    You absolutely do not need litz wire for BC band. In fact, excessive
    Q will lower your audio quality by diminishing the highs.

    Even Radio Shack sells a bag of 3 sizes of magnet wire, #22, #26 and
    #30.

    Mike
     
  11. Dave.H

    Dave.H Guest

    I can't seem to find a source for #30 wire, neither Dick Smith or
    Antique Electronic Supply stocks any, so I'll probably have to use the
    #28.
     
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