On Mar 25, 5:25*am, Fred Cameron wrote:
Would 3-400's be exact replacementsfor the 3-500's *in my L4B?

Thanks for your help!

Fred
W4FCM

If you will go to eHam.net there is some good info on using 3-400 &
3-500 tubes . I have owned several Drake L4B amps,all with 3-500
tubes ...I seem to remember seeing L4 `s with 3-400 tubes..I don`t see
any problem with changing from 3-400 to 3-500 If all(except fil )
pins are grounded .. GL W4PQW