OK, I can't type! That should be a 307A tube as a replacement for the 2E22. Sorry 'bout that, Chief!! 73 Rich Arland, W3OSS MSgt, USAF, Ret. Military Pro-sign: "Alpha Romeo" USAF Tech Controller for 20 years! Fuchu "Water Walker" 68-70/74-79 Lajes Field 70-73 3rd Herd 73-74 "Flintlock"/SOTFE 79-84 Langley AFB 84-87