Appendix 1
Parts Suppliers

Oscillator Coils, Intermediate-Frequency (IF) Transformers, Audio Transformers

1. Mouser Electronics: www.mouser.com (Xicon transformers and coils).

2. Centerpointe Electronics: www.cpcares.com (Xicon transformers and coils; for IF transformers, search under “Xicon I.F. Transformer.”)

Antenna Coils

1. Scott’s Electronics (Hard to Find Electronics Parts): www.angelfire.com/electronic2/index1/loopstick.html (for ferrite antenna coils).

2. MCM Electronics: www.mcmelectronics.com (Search for “loop antenna,” the AM radio type. This type of loop antenna will require an RF transformer as described in Chapter 3. For example, see the link http://electronics.mcmelectronics.com/?N=&Ntt=loop+antenna.)

3. Antique Electronics Supply: www.tubesandmore.com (The search term is “antenna coil.” As of 2012, the only antenna coil available has an inductance of 240 μH, which will match with a 330- to 365-pF variable capacitor.)

4. eBay (Search under “antenna coil,” “loopstick antenna,” “ferrite bar antenna,” or “ferrite antenna.” The typical inductances are from 330 to 788 μH. For antenna coils with inductances > 600 μH, one can unwind some of the wire and measure for the desired inductance using an inductance meter.)

5. eBay (Search under “ferrite bar” or “ferrite rod.” These blank rods or bars can be wound with wire such as Litz wire to the desired inductance. Typically, the length is at least 2 inches or at least 50 millimeters.)

Variable Capacitors

1. Scott’s Electronics (Hard to Find Electronics Parts): www.angelfire.com/electronic2/index1/index.html (For a 140-pF/60-pF dual variable capacitor, www.angelfire.com/electronic2/index1/Variable141pf.htm; for a twin 266-pF/266-pF variable capacitor, www.angelfire.com/electronic2/index1/266pf.html; for a twin 335-pF/335-pF variable capacitor, www.angelfire.com/electronic2/index1/335PF-Polyvaricon.html.)

2. eBay (Search under the terms “polyvaricon,” “variable capacitor,” “tuning capacitor,” or “crystal radio parts.” Note that some of the variable capacitors on eBay are trimmer or padding capacitors, which do not have sufficient capacitance, e.g., <100 pF, for the radios in this book.)

Crystal Earphones

1. Electronics (Hard to Find Electronics Parts): www.angelfire.com/electronic2/index1/index.html

2. eBay (Search under the terms “crystal earphone,” “crystal radio,” or “crystal radio parts.”)

Passive Components, Resistors, Capacitors, Fixed-Valued Inductors

1. Mouser Electronics: www.mouser.com

2. Digi-Key Corporation: www.digikey.com

3. Anchor-Electronics: www.anchor-electronics.com

4. HSC Electronic Supply: www.halted.com/commerce/index.jsp?czuid=1338011465538 (May have to purchase items at their stores.)

Crystals

1. Mouser Electronics: www.mouser.com

2. Digi-Key Corporation: www.digikey.com

3. Anchor-Electronics: www.anchor-electronics.com

4. HSC Electronic Supply: www.halted.com/commerce/index.jsp?czuid=1338011465538 (May have to purchase items at their stores; call to confirm.)

Ceramic Resonators (~455 kHz)

1. Mouser Electronics: www.mouser.com

2. Digi-Key Corporation: www.digikey.com

3. HSC Electronic Supply: www.halted.com/commerce/index.jsp?czuid=1338011465538 (May have to purchase items at their stores; call to confirm.)

4. eBay (Search term is “ceramic resonator.”)

Ceramic Filters (~455 kHz)

1. Mouser Electronics: www.mouser.com (The search term is “455-kHz ceramic filter.”)

2. HSC Electronic Supply: www.halted.com/commerce/index.jsp?czuid=1338011465538 (May have to purchase items at their stores; call to confirm.)

3. eBay (The search term is “ceramic filter 455 kHz.”)

Transistors, Diodes, and Integrated Circuits

1. Mouser Electronics: www.mouser.com

2. Digi-Key Corporation: www.digikey.com

3. Anchor-Electronics: www.anchor-electronics.com

4. HSC Electronic Supply: www.halted.com/commerce/index.jsp?czuid=1338011465538 (May have to purchase items at their stores; call to confirm.)

5. MCM Electronics: www.mcmelectronics.com

6. Jameco Electronics: www.jameco.com

Low-Noise Transistors and JFETs

1. Linear Integrated Systems, Inc.: www.linearsystems.com

Loudspeakers

1. MCM Electronics: www.mcmelectronics.com (Search terms are “cone speaker,” “Mylar cone speaker,” “50-mm speaker,” “66-mm speaker,” or “85-mm speaker.”)

2. Jameco Electronics: www.jameco.com (Search term is “speakers.”)

3. HSC Electronic Supply: www.halted.com/commerce/index.jsp?czuid=1338011465538 (May have to purchase items at their stores; call to confirm.)