Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Solid State => Topic started by: smackoj on January 13, 2013, 10:01:18 pm

Title: any useful reason to change power transistors in a Randall RB60?
Post by: smackoj on January 13, 2013, 10:01:18 pm

I have a late sevenites Randall RB 60 watt bass amp. I have replaced the orig. 15 inch spkr with a better quality one and I have done a thorough cap swap-out on the board. It runs quiet and smooth and has nice tone and there's no real urgency, but I would like an opinion on changing the power transistors. It uses 2 of the metal lay down type trans. to put out about 30 watts each. Does it make any sense to try and find a set of replacement trans. that have a higher amplification? In other words, can I make this amp stronger with just a simple transistor swap? Or, does that create a whole chain of events where all the up or downstream values on parts need to be changed too?

thanks in advance amigos

 :icon_biggrin:

Title: Re: any useful reason to change power transistors in a Randall RB60?
Post by: PRR on January 13, 2013, 10:38:21 pm

No, you will not get more power. The transistors just pass power, don't "make" power.

Do NOT mess with healthy power transistors. This usually ends badly.

Title: Re: any useful reason to change power transistors in a Randall RB60?
Post by: smackoj on January 14, 2013, 07:37:24 am

roger that PRR