Pearson Current Transformer Mega Sale
Weston, Fri Oct 14 2016, 05:57AMHi All,
I need to clear out a large number of pearson current transformers. These are from a recent lab clean out and are decommissioned from MIT / DOE. Cases are a bit dinged up, but these things are built like tanks and have all been electrically tested. Great for pulse power or tesla coils.
4 of the 325 model are available:
3 of the 310 model are available:
I also have 1 of the 1330, which is a beast and I am not as willing to part with:
Prices are (shipping included):
$150 for a 325
$200 for a 310
Make me an offer if you really want the 1330
Other reasonable offers considered.
Given the weight of these things (18Lbs) its probably not worth the cost of shipping these internationally, so unless you are willing to pay ~ $100 extra for shipping, USA only.
Re: Pearson Current Transformer Mega Sale
Hydron, Fri Oct 14 2016, 06:52AM
I would strongly recommend hanging onto at least one of the 310/325s (worst case can sell at a later time if you need the cash). 310 is probably the best one to keep.
The much higher 3dB point (10MHz) will make the a lot more useful for some measurements if you don't already have another CT available. Remember that the specification doesn't guarantee flat gain or phase shift <6deg any closer than a decade away from the 3dB points:
This means that the 1330 (1.5MHz upper 3dB point) runs out of steam much earlier than a 310/325 (10MHz upper 3dB point)
The other thing to consider is that a 0.1V/A would be handy to have around to measure smaller currents - 0.01V/A is great for tesla coils but could be marginal for some other uses, whereas a 0.1V/A unit optionally with a 20dB attenuator can be more flexible for low-medium current applications.
Edit: great score, and good luck selling them - I'm out of the running being overseas and having recently bought some smaller ones. Wish I'd have gotten such good freebies as a student! Best we ever had was an IGBT brick motherlode, but I wasn't building DRSSTCs at that point and didn't take advantage :(
Hydron, Fri Oct 14 2016, 06:52AM
I would strongly recommend hanging onto at least one of the 310/325s (worst case can sell at a later time if you need the cash). 310 is probably the best one to keep.
The much higher 3dB point (10MHz) will make the a lot more useful for some measurements if you don't already have another CT available. Remember that the specification doesn't guarantee flat gain or phase shift <6deg any closer than a decade away from the 3dB points:
This means that the 1330 (1.5MHz upper 3dB point) runs out of steam much earlier than a 310/325 (10MHz upper 3dB point)
The other thing to consider is that a 0.1V/A would be handy to have around to measure smaller currents - 0.01V/A is great for tesla coils but could be marginal for some other uses, whereas a 0.1V/A unit optionally with a 20dB attenuator can be more flexible for low-medium current applications.
Edit: great score, and good luck selling them - I'm out of the running being overseas and having recently bought some smaller ones. Wish I'd have gotten such good freebies as a student! Best we ever had was an IGBT brick motherlode, but I wasn't building DRSSTCs at that point and didn't take advantage :(
Re: Pearson Current Transformer Mega Sale
Weston, Wed Jan 25 2017, 02:46PM
2 of the 310's left and one 1330.
Now its
$160 for a 310 (0.1 V/A)
$300 for the 1330 (0.005 V/A)
The 1330 would be great for a large pulsed capacitor bank. Its 100kA peak with a 65 A-s rating.
Weston, Wed Jan 25 2017, 02:46PM
2 of the 310's left and one 1330.
Now its
$160 for a 310 (0.1 V/A)
$300 for the 1330 (0.005 V/A)
The 1330 would be great for a large pulsed capacitor bank. Its 100kA peak with a 65 A-s rating.
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