Surplus Parts
Ferrite Cores - FeNiCu Impendance of FeNiCu compared to material 43• Ferrite Cores
A variety of 'High Flux' Cores, Material: FeNiCu - Impendance see below
'High Flux' Core Size 1:
| Outer diameter Length Inner diameter |
................. ................. ................. |
28.0 mm 13.0 mm 15.9 mm |
'High Flux' Core Size 2:
| Outer diameter Length Inner diameter |
................. ................. ................. |
28.0 mm 20.0 mm 15.9 mm |
'High Flux' Core Size 2 Long:
| Outer diameter Length Inner diameter |
................. ................. ................. |
27.6 mm 28.2 mm 17.5 mm |
'High Flux' Core Size 3:
| Outer diameter Length Inner diameter |
................. ................. ................. |
34.7 mm 12.8 mm 20.6 mm |
'High Flux' Core Size 4:
| Outer diameter Length Inner diameter |
................. ................. ................. |
58.5 mm 12.6 mm 34.0 mm |
(15.8 mm coax to 15.9 mm core inner diameter)
These are surplus cores with material analysis.
| Art. # | Description | Stock | Price |
| HF Core Size 1 | High Flux Ferrite Core, 28.0 x 13.0 mm, bore 15.9 mm, used | € 1.90 |
| HF Core Size 2 | High Flux Ferrite Core, 28.0 x 20.0 mm, bore 15.9 mm, used | € 2.30 |
| HF Core Size 2 Long | High Flux Ferrite Core, 27.6 x 28.2 mm, bore 17.5 mm, used | € 2.40 |
| HF Core Size 3 | High Flux Ferrite Core, 34.7 x 12.8 mm, bore 20.6 mm, used | € 2.50 |
| HF Core Size 4 | High Flux Ferrite Core, 58.5 x 12.6 mm, bore 34.0 mm, used | € 3.40 |
Prices incl. legal VAT. plus shipping costs
HF Kern No. 2 in a 28 mm heat shrink tube with glue, see here
• Impendance of FeNiCu compared to material 43
Comparative Scan of Ferrite Cores in a test chamber near to suggestion by Kurt Poulsen, Tom Hagen and Whitham D. Reeve, Applying and Measuring Ferrite Beads, Part III:
• HF Core Size 2, material FeNiCu, scan 1.0 ... 200 MHz
• A PDF on how this was measured > 
Ferrite Material FeNiCu is not a best specification for use on VHF / UHF as Materials 43 or 61 from NiZn show higher Impedance per size ... but it is sufficient even for demanding applications:
A single size 1 High Flux Core was used by the V31EME DXpedition (DG8NCO) on a 432 MHz 25 el. Yagi lasting 3 moon paths with 0.9 kW in WSJT enabling even a CW EME QSO with this single Yagi.
