Author Topic: Valve replacement options  (Read 293 times)

Offline VikingRSA

Valve replacement options
« on: January 12, 2021, 09:13:49 AM »
I am very new to valves (tubes) and just acquired a small 2 watt Vox valve guitar head amp. I would like to change the preamp valves to something a little warmer. Current setup is Pre=2 x 12AX7, Power=1 x 12AU7. Any suggestions that could cleanup the sound a little bit?


Offline Hi-Phibian

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Re: Valve replacement options
« Reply #1 on: January 12, 2021, 11:08:29 AM »
You canít really roll types. (A 12AU7 needs to be changed for another 12AU7 for eg.  You can roll brands / manufacturing dates / factory.   




 
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Offline gavinbirss

Re: Valve replacement options
« Reply #2 on: January 12, 2021, 12:11:28 PM »
You canít really roll types. (A 12AU7 needs to be changed for another 12AU7 for eg.  You can roll brands / manufacturing dates / factory.

In some cases pin and electrically compatible tube can be substituted to between a ECC83/ECC82/ECC81 to alter gain. An example is a 5965/A to a ECC81/12AT7. With lower gain perhaps less noise or a sonic preference or personal preference.

As long heater power arrange 12.6/6.3V is correct for the substitute.
« Last Edit: January 12, 2021, 12:36:07 PM by gavinbirss »