JLSEM's chokes

Design and use of Chokes for PS, anode and filament use.
Post Reply
dave slagle
Posts: 2037
Joined: Sat Jan 22, 2005 3:54 am
Location: NYC
Contact:

JLSEM's chokes

Post by dave slagle »

John gave me a choke to measure at the LSAF and he has a stash of them.

Image

the long narrow window and dual bobbins makes for a very low capacitance design. The tape appears to be around 4mil or in the M2 neighborhood.

They measure really well and should make wonderful plate chokes.

DCR is around 320 ohms.

L v. I
Image

I'd be comfortable with 15-20ma...

L vs. AC@50hz (10madc)
Image

the lower inductance at low excitation is typical of steel.

Now for the HF response and again it looks good.

Image

looks like a winner with any tube under say a 4K rP and 20ma of current.
Get Your Fix
www.hifiheroin.com
Post Reply