Gang,
I have enjoyed the thread and Zack's response to the question about how
to wind half turn on a toroid. I've seen toroid winding counts on the
OUTSIDE of the core (Ham Radio Today, from England)...
Toroids are pesky components and sometimes there are bizarre
interpretations of the calculations. My opinion is that the designer was
not too familiar with toroids and guesstimated the number of turns
rounding to half, as it was common with helicoidal inductors. That also
happens in other fields too, and to the opposite:
A fellow from Europe, while working on his PhD in the US (University
name whitheld ;-) ordered a plexiglass fishtank on metric. Fellas at the
workshop asked him to specify on Inches and, lo and behold, the guy took
the calculator and a 10 x 10 x 20 cm fishtank got converted into a
3.9730 x 3.9730 x 7.8740 in. fishtank. I think it has been the most
expensive fishtank built at that workshop by precision machinists! (
near US$1000 in the seventies).
Back to the toroids, I will round the number short and wind the turns
really tight (which increases inductance ... as far as my experience
tells me :-)
Be well.
jon, ea2sn
[
QRP-L Archive |
]
[
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
1999 |
2000
]