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Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
They end with high leakage inductance because they need lots of turns to cover their specified frequency range, while you can usually get much better if winding a GDT for exact frequency you need with only little headroom. That's why I always advise using lowest number of turns to saturation, simply because it will give lower leakage inductance.
Using a 2-cored mini coax cable like those used for audio connections also helps greatly in reducing leakage inductance.You use the cores as secondaries and braid as primary, now you have your secondary coils virtually ''inside'' your primary coils.
It may not although have good standoff of higher voltages (700V+) like wire wound GDT.
Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
Marko wrote ...
They end with high leakage inductance because they need lots of turns to cover their specified frequency range, while you can usually get much better if winding a GDT for exact frequency you need with only little headroom. That's why I always advise using lowest number of turns to saturation, simply because it will give lower leakage inductance.
Using a 2-cored mini coax cable like those used for audio connections also helps greatly in reducing leakage inductance.You use the cores as secondaries and braid as primary, now you have your secondary coils virtually ''inside'' your primary coils.
It may not although have good standoff of higher voltages (700V+) like wire wound GDT.
Yes, this method is superior at maximizing your coupling factor.
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Found some excellent GDTs
