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Title: Valiant L12 choke replacement Post by: K2GTM on March 20, 2021, 01:15:08 PM Hello all,
I'm working on a Valiant and discovered a crack on the side of L12, the 4.7uH RF choke that mounts under the large plate choke, L11. It tests fine, but I don't like leaving it that way. I was thinking of sealing it with shellac or nail polish, but I'm guessing replacement is the best course of action. What choke should I buy to replace it with? I want to make sure the new one will handle the current involved. Thanks and 73, Greg K2GTM Title: Re: Valiant L12 choke replacement Post by: K2GTM on March 20, 2021, 01:17:57 PM I was toying with the idea of replacing it with a ferrite-core choke. I have a bunch of 100uH chokes from Radio Shack and I unwound one until I got to 4.7uH. Would that work?
Title: Re: Valiant L12 choke replacement Post by: DMOD on March 20, 2021, 08:36:01 PM I was toying with the idea of replacing it with a ferrite-core choke. I have a bunch of 100uH chokes from Radio Shack and I unwound one until I got to 4.7uH. Would that work? These chokes were primarily used for two purposes. 1) to keep VHF trash inside the cabinet, 2) as a fuse for L11. Newark and Jameco may have one https://www.newark.com/ferroperm/1582-4-7uh-1-3a/inductor-4-7uh-1-3a-10-95mhz/dp/21M5811 https://www.jameco.com/z/B82144A2472K-EPCOS-Fixed-Inductor-RF-Choke-4-7uH-10-Wirewound-1-6A-160-mOhm-Unshielded-Axial_2312559.html or on Sleezebay https://www.ebay.com/itm/5uH-1-2A-ex-USSR-INDUCTOR-AXIAL-RF-CHOKE-QTY-20-NOS/262680187155?hash=item3d28f59113:g:HfMAAOSwZJBYBggI Phil AC0OB Title: Re: Valiant L12 choke replacement Post by: K2GTM on March 21, 2021, 06:02:36 PM Thanks for the info, Phil. I actually found one in my junkbox! (I didn't know I had ANY chokes in there - lol.) AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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