[Amps] TL922A Choke Alternative

Mark Robinson markrob at mindspring.com
Wed Nov 9 08:56:09 PST 2011


I am repairing my TL922A after a grid to filament shorted tube. I found that 
one of the grid to ground rf chokes appears to be short circuited - it 
measures around 0.1 ohms. It looks darker than the coil on the other tube 
base which was actually open circuit. I managed to repair that one and it 
now measures 2.6 ohms. This is part L7 and L8. It has a Kenwood part number 
of  L33-0259-05 and is a 470uH part. This part appears to be discontinued 
and unavailable. Will this Bourns part be a suitable alternative?

http://www.mouser.com/ProductDetail/Bourns/5800-471-RC/?qs=sGAEpiMZZMv126LJFLh8y4rtocMwlKUK4usuRa1xM5o%3d

I am not sure what I should be looking for.


73 Mark N1UK 



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