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S.O.S. Electronics Scout 20 Amplifier help
- Thread starter Alabama Trainman
- Start date
It looks like a non-ferrite support, so chances are an air would coil calc would get you reasonably close. Why not just wind one with the same number of turns on the same diameter form with the same diameter wire?
Because I don't have the materials. Looking for the mH value to purchase a new one. Thanks.
I counted 90 turns. If you can tell me the form diameter and the wire gauge, I can figure it out.
Based on the picture... (a guess that it's 20awg and 1/4" diameter), about 4.8uH. I'd bet it's a standard value 4.7uH.
That would be microhenries (uH), not millihenries mH.
The old Ohmite Z28 choke would work fine. I'm hesitant to use less than around 22 uH, but some amplifiers get by with less.
Had a look at RF Parts. Not much to see in this category there.
73
The old Ohmite Z28 choke would work fine. I'm hesitant to use less than around 22 uH, but some amplifiers get by with less.
Had a look at RF Parts. Not much to see in this category there.
73
No.
It's the plate choke, or "anode choke" for purists. It does two things. Provides a low-resistance path for DC current from the HV power supply to the tubes' plate circuit. Second, it blocks the flow of RF current that would otherwise feed back into the HV power supply.
73
If it's a simple plate choke for a cb amp it easily home brewed. See if you can borrow an inductance meter