2 chokes, are they keepers ?

[cbueche]

I have recovered 2 chokes from an old UPS system, with my LCR meter, they measure:

• choke 1: 2.8 mH, 0.19 Ω DCR, Q=4.87, wire Ø 1.6 mm
• choke 2: 130 mH, 0.88 Ω DCR, Q=3.37, wire Ø 0.9 mm

I'm into tube amps, where I usually see higher L values in DC filtering. Is there any usage you can see for them, or should I avoid adding them to my cellar stack of heavy metal ?

 

[Mark Tillotson]

That's mighty thick wire for a valve system - chokes are usually several henries and 100's of ohms with lots of very fine wire, since valves pull mA, not amps.

For solid state power supply filtering they would make more sense.

One problem is finding out the maximum DC current rating if its not marked - there's probably a clever way to do this, but I've never needed to characterize a random inductor like this.

 

[Andersonix]

Show a picture?
Perhaps as part of a SMPS single rail DC filter?
https://diyaudiostore.com/collections/power-supplies-accessories/products/smps-dc-filter-p089zb-kit

 

[cbueche]

That could be an usage yes, low voltage, high current. Not with that PCB though 🙂