[Amps] Need info on 8874's

[w5pvr at I2k.net (Bob Kirkland)]

Recently bought an old Alpha PA-76, a 2 holer using 8874's. Anyone know the
Eimac date codes, these are marked E6QD 8289 and E6QD8299. Also the amp is
full of nicotene and it is up inside the tubes fins. Have to get it out or
the tubes won't cool properly soap and water no help inside the fins. Maybe
409 would work but would it hurt the tubes ceramics, conductive?, ect.
Bob, w5pvr@I2k.net