Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: slim66 on June 08, 2026, 10:50:26 pm

Title: Any tips for taming a wild 5E3?
Post by: slim66 on June 08, 2026, 10:50:26 pm

So, I built my 1st 5E3.  I used P-TGP-002 PT and a Hammond 1750-H OT.  The 1st filter cap is 33uf, and the power tube cathode resistor is a 10w, along with a 50v power tube bypass cap.  The rest of the circuit is standard.
     Going into a Celestion G12M 65 watt speaker, this thing is too loud with the volume at 1.  Also, like most 5E3's, it starts grinding at @2, and just keeps getting more grindy after that.

     What can I do to tame it a bit?

Thanks, 

Slim

Title: Re: Any tips for taming a wild 5E3?
Post by: isaac_teller on June 09, 2026, 06:16:54 am

If you have a 12AX7 in V1 try a 12AY7 instead. If still too much' try a 12AU7.

Title: Re: Any tips for taming a wild 5E3?
Post by: pdf64 on June 09, 2026, 08:19:08 am

Voltage survey?
Volume pot taper?