My 8950 one work good it's getting capped anyway but last I'll start learning on the 50.00 one the 8950 seems to need returning after each key up and its not modulating well its low on meter I uninstall it and modulating normal according to meter anyway ? I get 275 or so out pep after multiple rekeys but let it sit and watts drop back again guy I bought it from also said he had a siltronix 1011 comanche for sale might have been over driven what does that weaken the driver or all four tubes anyone know why it's doing this?