new here pre amp tube help please

THE NEW #1. Series One Amplifiers.
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Posts: 2
Joined: Tue Feb 19, 2013 8:00 pm

Tue Feb 19, 2013 8:03 pm

Hi everyone :D im using a series one 100 head and have just got some harma pre amp tubes. Can I simply just pull out the old ones and put the new ones in ?
Many Thanks in anticipation

Posts: 97
Joined: Thu Feb 21, 2013 4:51 pm

Wed Feb 27, 2013 4:02 pm

If you feel comfortable doing it yourself.Yes.The power amp tubes should be re-biased.But the preamps can be changed out.

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