b3ta.com board
You are not logged in. Login or Signup
Home » Messageboard » XXX » Message 9890835 (Thread)

# not a lot
err, looks like a complicated way of doing a 1:1 transformer, But need to know the turns ratios the be precise.
(I helped save b3ta! lord bofingham, Wed 27 Jan 2010, 22:57, archived)
# assume # of turns is proportional to # of squiggles.
my thinking is that, through one circuit, it's step down, but through the other, it's step up, so it could be 1:1. Or it might not be. Depending on which way the current wants to go.
(I helped save b3ta! Moon Girl Technologies horrendous beanbag, Wed 27 Jan 2010, 23:00, archived)
# Putting AC thru it would be odd.
Phase would change on output.
(I helped save b3ta! Tahkcalb ω∞ for sigs, Wed 27 Jan 2010, 23:03, archived)
# it would have to be AC, or it wouldn't do very much at all.
you could also introduce LC filters in the middle, for lols, to get a transformer whose ratio depends on the frequency.
(I helped save b3ta! Moon Girl Technologies horrendous beanbag, Wed 27 Jan 2010, 23:05, archived)
# non issue
it's balanced just switch over the connections
(I helped save b3ta! lord bofingham, Wed 27 Jan 2010, 23:06, archived)
# yep
on the LHS the upper half of the centre section looks like a 3:1 step down, in phase with the lower half which looks like a 3:2 step down. And on the RHS vice versa, overall giving you in=out
(I helped save b3ta! lord bofingham, Wed 27 Jan 2010, 23:04, archived)
# but that's assuming equal current distribution between the two paths,
which isn't necessarily the case for all types of output load. I've a feeling the overall ratio could be quite unpredictable.
(I helped save b3ta! Moon Girl Technologies horrendous beanbag, Wed 27 Jan 2010, 23:06, archived)
# possibly but not necessarily.
If we're getting into that level of detail we need detailed specs of the two transformers.
(I helped save b3ta! lord bofingham, Wed 27 Jan 2010, 23:10, archived)
# I'm going to have to make one, I think.
It's not going to blow my house up, despite the concern expressed above. At least, not if I only use low voltage.
(I helped save b3ta! Moon Girl Technologies horrendous beanbag, Wed 27 Jan 2010, 23:13, archived)
# I'm intrigued now
What do you expect?

it's going to give you in=out unless you go to too high or too low freqs or too high or too low power loads, and then, unless there's some odd unbalance in the transformers or wiring it'll be nothing unusual
(I helped save b3ta! lord bofingham, Wed 27 Jan 2010, 23:22, archived)
# Would it have some capacitance?
(Reading between the lines {;-) )
(I helped save b3ta! FeralCatMan Unusual disease collector., Wed 27 Jan 2010, 23:06, archived)
# everything has some capacitance.
which raises an interesting point about the gate charge of MOSFETs in switching power supplies.
(I helped save b3ta! Moon Girl Technologies horrendous beanbag, Wed 27 Jan 2010, 23:08, archived)
# and PAL and NTSC
NTSC (Never The Same Color) bolloxed the colour on US TVs due the base emittter capacitance variation of transistors changing with DC offset, PAL (Pricey And Late) overcame this with an expensive modification
(I helped save b3ta! lord bofingham, Wed 27 Jan 2010, 23:16, archived)