[Amps] drake l-4b from 4-400 to 3-500

[DF3KV]

----- Original Message -----
From: "Partain, Chuck" <Chuck_Partain at maxtor.com>

>i'm thinking now, it maybe a L4 not the B model..

>maybe i just didn't pay attention...I've been busy with
>too many projects. this was given to me to look at for a repair
>(yes a friend ham) and was just curious on swapping this over.
>the PS had bad caps(replaced) the diodes were replaced and also the
>glitch resistor and a 5k 10w was cooked...that had been replaced. so
some work
>has been done..


Hi Chuck,

the L4 was equipped with 3-400Z and the L4B with 3-500Z.
If you still get full output there is no need to swap the tubes,
anyway both types will do fine.
Alternatively you could use 4-400s if you wire the screen
connectors to the grid, but they need a bit more drive.
Mine doing very well in my L4B

73
Peter