It is currently Mon Mar 16, 2020 2:55 pm

All times are UTC - 7 hours



Post new topic Reply to topic  [ 5 posts ] 
Author Message
Post subject: Deluxe VM combo which 12AX7 valve is for the pre amp gain?
Posted: Mon Feb 27, 2017 7:13 am
Offline
Hobbyist
Hobbyist

Joined: Mon Feb 27, 2017 2:08 am
Posts: 3
I have a Deluxe VM combo and want to try a different pre-amp gain valve to see how the overdrive tone changes, so does anyone know which of the two 12AX7 valves is for the pre amp gain? One of the 12AX7s is for the phase inverter, so looking from the back, which of the two controls the pre amp gain, the one nearest to the end or the other one!? Thanks!


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: Deluxe VM combo which 12AX7 valve is for the pre amp gai
Posted: Tue Feb 28, 2017 4:42 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
The 12AX7 close to one side ( behind input jack ) is the preamp. The 12AX7 close to the power tubes is Phase Inverter.


Top
Profile
Post subject: Re: Deluxe VM combo which 12AX7 valve is for the pre amp gai
Posted: Mon Mar 06, 2017 12:12 am
Offline
Hobbyist
Hobbyist

Joined: Mon Feb 27, 2017 2:08 am
Posts: 3
stratele52 wrote:
The 12AX7 close to one side ( behind input jack ) is the preamp. The 12AX7 close to the power tubes is Phase Inverter.


Thanks for that. I'll give it a try. I'll post the results if they show any noticeable change in tone.


Top
Profile
Post subject: Re: Deluxe VM combo which 12AX7 valve is for the pre amp gai
Posted: Mon Mar 06, 2017 2:34 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
12AY7 or 5751 will give more clean sound and lower volume

12AX7; different brand may change something if you can hear it

.http://www.thetubestore.com/Resources/P ... be-Reviews


Top
Profile
Post subject: Re: Deluxe VM combo which 12AX7 valve is for the pre amp gai
Posted: Wed Mar 08, 2017 11:21 pm
Offline
Hobbyist
Hobbyist

Joined: Mon Feb 27, 2017 2:08 am
Posts: 3
it has a groove tubes / sovtek 12AX7 in there at the moment. I'll try an Electro Harmonix 12AX7, the same as in my Super Champ XD, to see how it changes, if at all.


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: