Questions tagged [ferrite]
38 questions
6
votes
1 answer
Are some ferrites porous enough they should be protected outside?
I recently bought a couple of 61-mix toroids, and as usual I wrote the mix number on them before they become mystery parts. However, the ink soaked right into the ferrite.
I've left ferrites hanging out in the weather, getting wet and frozen without…
Phil Frost - W8II
- 51,701
- 6
- 88
- 212
3
votes
1 answer
How does this 3 dB splitter/combiner work?
I'm having difficulties to understand how does this circuit work:
Apparently T1 is a regular 50 Ohm to 22.2 Ohm autotransformer. Turns ratio 2:3 gives a 0.66**2 impedance converation. Since the load is two 50 Ohm ports in parallel, the total load…
Aleksander Alekseev - R2AUK
- 4,272
- 15
- 52
2
votes
1 answer
Core mix preferences for a balun (or unun) vs a choke
Was watching a YouTube video a little while ago and an engineer from Palomar engineers mentioned that using Mix #31 cores for balun construction wasn't ideal.
He went on to mention that Mix 31 (or 43 and others) are fine for choking/CM suppression,…
t252
- 697
- 4
- 13