Magura said:
The shunty is fine then, having to sink 150mA😱 I know you got the heatsinks for that🙂
500mA through a preamp?? Ya' nutz
I better build it into a biggish case, with room for some serious hardware then.🙂
Edit Good call, moving the HS away from the board in this case. I plan to use a series reg at first, and simply measure the excact current draw, before attaching a shuntreg. Luckily I have a spare set of Shunty boards.
steenoe said:
The shunty is fine then, having to sink 150mA😱 I know you got the heatsinks for that🙂
500mA through a preamp?? Ya' nutz
🙂
500mA is for two channels, I recall specifying 250 or 300mA as minimum current per inductor.
Magura 🙂
steenoe said:
As I recall, there are two longer, and two shorted leads. They represent the inner and outer to each coil.
Magura 🙂
Cool you have turned this old thread back on - and it seems that all my boards have landed unharmed at maguras place. 😉
steenoe said:
with L meter
connect two wires and measure ; if you connected them in phase , you'll have mucho L overall , comparing to L of halves
cviller said:
Hi cvi😉
Zen Mod said:
Thanks. It says 205mH no matter which two I connect together. Each winding is 48mH.
🙂
cviller said:
Oh, you're still alive and kicking 🙂
Yes, the boards has landed in Denmark.
Some has taken off to Austria, some to Italy, so now I'm just about out of boards.
Magura 🙂
steenoe said:
You can't measure it like that, when it has no core.
If the other coil is not powered, it's just dead metal in a bad place, so you get a smaller reading on the L meter.
Magura 🙂
steenoe said:
😕
my trusty (memeasurefookineverythin' " ) russkie meter always tells me when windings are outa phase .
OK - then just stay with MetalDanske's recipe , then CRO will tell if you have something out of phase .
Zen Mod said:
Cause it is Ruskie, as in higher current.
Me thinks modern el-cheapo L-meter is not able to deal with dual air core. Me also had problems measuring 😡
Magura 🙂
Magura said:
I'm kicking alright! 😀
You haven't signed up for any F5 pcbs... have you built one already?
Zen Mod said:
Might be a silly question but do you actually want the windings to be in phase or out of phase? The setup is differential, so in phase would be out of phase or what? 😕
When I connect the two long ends as CT. the meter says 2,3mH🙂 Something works, maybe not all though. Each half is 48mH and both windings in || also says 48mH.
🙂
🙂
Zen Mod said:
Here 😀
http://www.diyaudio.com/forums/attachment.php?s=&postid=1690821&stamp=1229797601
Long white thingies.
Magura 🙂
cviller said:
To be honest, I can't remember, but what I do recall, is that you have no doubt if you have it hooked up right.
A weak memory of connecting the coils out of phase is surfacing though.
Magura 🙂
steenoe said:
I suspect that the meter is not up to the task. I have found, that the higher DCR a coil has, the further the reading has been off. I never had this sort of issues, with the big low DCR inductors.
Magura 🙂
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