[VH-4] Switching into 50w by removing 2 EL34 ?

[Fend]

Hello,

So, is it possible ?
If yes, how to do that ?

Thank you

 

[Jaymz82]

Just pull either the two outer or two inner tubes.

Do NOT change the impedance when connecting the cab. Peter just posted that with Diezel amps you don't have to do this.

 

[Fend]

Thank you Jaymz82

I'll try it.
That's the way to test my matching pair of JJ E34L
I need more mids, specially on channel 2 !

 

[Fend]

Do NOT change the impedance when connecting the cab. Peter just posted that with Diezel amps you don't have to do this.

Are you sure of that ?!
How is it possible ?! Does Peter explain that somewhere on this forum ?

 

[Jaymz82]

Yes, Peter does. Have a look at this thread: viewtopic.php?f=14&t=25497

 

[Fend]

Thank you, I don't understand why but it's seems to be clear !

 

[Jaymz82]

Thank you, I don't understand why but it's seems to be clear !

I don't understand it either. Never really got into the electronic kind of stuff. I'm more of a wood guy and rather build guitars than amps

 

[flownomis]

dude, i only know that it works with einstein, never heard that the vh4 is able to do that !?!?!
i would wait for a confirmation from peter !

 

[White_Van]

You can do that with any 100 watt amp with 4 output tubes. It's not just the Einstein. The only amp you couldn't do it with would be the VH4-S, because of the stereo-ness of the poweramp.

 

[Fend]

Today I changed the EL34 by a matched pair of JJ. I let the two outer tubes only, all is working, without adapting the impedance.

I've tested some preamp tubes and my choice is : 2 JJ ECC83 in V1/V2 (brings rich mids with very good noise isolation) and 2 General Electrics JAN (NOS) in V3/V4 (sounds bighter with more hi-mids and excellent definition), it sound better for me, with more mids.

Thank you for your help !