We are a reliable source for many of your litz wire and crystal radio part needs. Since 2008, we've sold more than 14,000 orders with excellent customer feedback. Please visit our eBay Store at mkmak222_Litz Wire to see what is currently available.
We have over a hundred types of litz wire in stock. They contain 5 to 1725 strands of AWG 48 to 28 (0.03 mm to 0.32 mm) wire. The litz wire's equivalent AWG are from AWG 36 to AWG 4.
If you don’t see a particular type of litz wire that you're interested in, please contact us so that we can help arrange a custom order. We can usually have these delivered in three weeks. Large orders may be purchased at the wholesale price.
Most orders will be shipped within one day. The small amount of wire will be coiled on 6” or 7” diameter paper spool to prevent the destruction of the litz wire structure. Larger amounts will be coiled on the original plastic spool.
Note: For avoid damage the structure of the small Litz wire, please observe photo “How to un-coil litz wire from the spool" on my eBay List.
When winding a coil, in order to smoothly un-coil the Litz wire from the paper spool, the simple method is: Vertically fix a 1/4-inch diameter screw rod on a flat plate, and then put paper spool into screw rod flat. When you pull out the litz wire from the paper spool, the paper spool can rotate freely on the screw rod, and the litz wire will not be twisted and knotted.
You only need an electrical solder iron to solder the litz wire. When you heat the end of litz wire, the polyester yarn insulation will be melted and recoiled, the polyurethane insulation that covers on copper strands wire will be completely volatilized, and the copper wire will be tinning.
Here you are bidding on one special nickel-zinc ferrite
toroid. The size is 45 X 26 X 8 mm, use Ni-Zn R40C1 material. Made in China.
The Products made by Ni-Zn R40C1 material are design to use for shortwave transmitter power distribution, power combining, impedance transformation, power output, power chokes, short wave antenna barron and so on; in high frequency applications they have low loss characteristics.
The photo above shows the characteristics of this R40C1 ferrite toroid. Its applied frequency is up to 50 MHz.
The R40C1 Ferrite Toroids made by special formula. We don’t know why this type of Ferrite Toroid has very high Q when wind the coils for LW, MW and part of the SW. Even though the material R40C is very close to R40C1, the Q is much lower with the same coil spec (usually not easy to reach 700Q in MW). I introduce the R40C1 here because the Crystal Radio enthusiast always wants to make coils that have high Q and want them as high as possible. The coils I wound with R40C1, are able to get 1140 Q at 3 MHz.
For sure the R40C1 can use for many other applications. This field is waiting for discover by amateurs.
Use this R40C1 45 X 26 X 8 mm ferrite toroid and litz wire to make coils will give you a big surprise! It can get very high Q value and let the radio circuits significantly increase the selectivity and sensitivity.
I stick two 45 X 26 X 8 mm toroids
together with a layer of Teflon membrane (PTFE). It is equivalent to 45 X 23 X 16 mm.
I thought of Ben Tongue's Contra Wound Coil. I intertwine two coils opposite direction; each one is 30 turns 270/AWG 46 Litz wire (the wire length is 18 feet). Inductance is 233 µh when two coils is series connection (30 + 30 turns), and 71 µh when two coils is in parallel (30 turns but equivalent with the 540/AWG 46 Litz wire). Measurement results are:
Series connection Parallel connection
513 KHz
1286 Q
____
555 KHz 1319 Q ____
605 KHz 1349 Q ____
705 KHz 1393 Q ____
805 KHz 1416 Q ____
905 KHz 1424 Q ____
1005 KHz 1408 Q 1005
KHz 1467 Q
1105 KHz 1373 Q 1105
KHz 1478 Q
1205 KHz 1367 Q 1205
KHz 1486 Q
1305 KHz 1339 Q 1305
KHz 1486 Q
1405 KHz 1311 Q 1405
KHz 1481 Q
1505 KHz 1280 Q 1505
KHz 1473 Q
1605 KHz 1243 Q 1605
KHz 1460 Q
1705 KHz 1203 Q
1705 KHz 1446 Q
____
1805 KHz 1427 Q
____
1905 KHz 1408 Q
____
2005 KHz 1386 Q
____
2105 KHz 1364 Q
____
2205 KHz 1340 Q
____
2305 KHz 1315 Q
____
2405 KHz 1290 Q
____
2505 KHz 1267 Q
Up to 3.0 MHz still can get 1140 Q.
An amateur used two R40C1 45 X 26 X 8 mm ferrite toroids and 270/46 litz wire to wound a coil, the Q are all over 1200Q between 500 – 1700 KHz, the highest point is 1400Q at 800 KHz.
For more information of this R40C1 45 X 26 X 8 mm ferrite toroid, please search "The RadioBoard Forums" on google and read all interesting articles of “R40C1” in Crystal Radios section.
If you need 175/46, 250/46, 270/46, 300/48, 420/48 or 675/48 litz wire to make coils for this ferrite toroid, please visit my eBay store mkmak222_Litz Wire to search these litz wire.
We have hundreds of sizes of Litz wire for sale. Please search in my eBay Store mkmak222_Litz Wire . When you search for Litz wire, use the key word format “xxx/yy”. For example, if you are looking for 660 strands of AWG 38 Litz wire, enter key word “660/38” to search (“660” is the number of strands, “38” means the strands are used AWG 38 enameled wire)
Here are the Litz wire currently in stock and their recommended operating frequency:
(Note: The following Litz wire sizes, the ones marked in GREEN are made in USA; the ones marked in BROWN are the Unserved types and made in USA. These are all in stock on my eBay store. If you would like to order, please send us a request.)
Strands AWG Size -- Recommended Operating Frequency
Number of Strands / Strands AWG size
AWG 48 (0.0305 mm) -- 1.4 MHZ to 2.8 MHZ:
180/48, 300/48, 420/48, 675/48, 1100/48, 1725/48, 2700/48, 4500/48
AWG 46 (0.0406 mm) -- 850 KHZ to 1.4 MHZ:
10/46, 20/46, 30/46, 40/46, 60/46, 66/46, 100/46, 175/46, 270/46, 330/46, 420/46, 660/46, 924/46, 1050/46, 1162/46
AWG 44 (0.0508 mm) -- 350 KHZ to 850 KHZ:
10/44, 20/44, 30/44, 40/44, 60/44, 70/44, 100/44, 125/44, 160/44, 255/44, 405/44, 650/44, 1050/44
AWG 42 (0.0635 mm) -- 200 KHZ to 350 KHZ:
15/42, 16/42, 26/42, 32/42, 40/42, 66/42, 105/42, 165/42, 270/42, 420/42, 660/42, 1050/42
AWG 40 (0.0787 mm) -- 100 KHZ to 200 KHZ:
17/40, 27/40, 42/40, 66/40, 105/40, 108/40, 125/40, 170/40, 270/40, 435/40, 700/40, 1000/40, 1100/40, 1500/40
AWG 39 (0.0889 mm) :
19/39, 19/39,
AWG 38 (0.1016 mm) -- 50 KHZ to 100 KHZ:
7/38, 8/38, 10/38, 16/38, 17/38, 19/38, 25/38, 25/38, 38/38, 40/38, 60/38, 66/38, 100/38, 162/38, 200/38, 260/38, 280/38, 420/38, 660/38, 1050/38, 1650/38
AWG 37 (0.1143 mm) :
19/37,
AWG 36 (0.127 mm) -- 20 KHZ to 50 KHZ:
10/36, 11/36, 16/36, 16/36, 27/36, 30/36, 40/36, 41/36, 65/36, 105/36, 165/36, 265/36, 420/36
AWG 34 (0.1601 mm) :
5/34, 6/34, 10/34,
AWG 33 (0.1803 mm) -- 10 KHZ to 20 KHZ:
4/33, 9/33, 13/33, 21/33, 32/33, 53/33, 82/33, 100/33, 150/33, 210/33, 329/33
AWG 32 (0.203 mm) :
10/32, 20/32,
AWG 31 (0.2261 mm) :
5/31,
AWG 30 (0.254 mm) -- 1 KHZ to 10 KHZ:
7/30, 10/30, 11/30, 17/30, 26/30, 42/30, 65/30, 110/30
AWG 28 (0.32 mm) -- 60 HZ to 1 KHZ:
5/28, 7/28, 10/28, 18/28, 27/28, 42/28, 66/28
Please E-mail any questions you may have before you bid.
Fast shipping! Usually mail on next working day, but if I can get ready before the Post Office closes, the package will mail on the same day when you order.