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Title: Strange overdrive with vvr Post by: deltacomet on February 09, 2012, 03:04:05 AM I installed a vvr in my ots. All work , good sound in clean. But when in put overdrive on, Isn't the same sound before vvr. I put level and ratio to 10 and my clean channel is louder than overdrive.
How can i have the overdrive back again ? Put vvr only in my power tube and install ppimv ? May, i have did something wrong ? Thanks Gui Title: Re: Strange overdrive with vvr Post by: sduck on February 09, 2012, 03:44:02 AM Based on my very limited reading on this I think you'd want it on the power section instead of V1 on these amps.
http://damacleod.wordpress.com/2010/03/12/installing-variable-voltage-regulator-vvr-in-a-valve-amp/ (http://damacleod.wordpress.com/2010/03/12/installing-variable-voltage-regulator-vvr-in-a-valve-amp/) Title: Re: Strange overdrive with vvr Post by: plasticvonaband on February 09, 2012, 07:52:29 AM Based on my very limited reading on this I think you'd want it on the power section instead of V1 on these amps. http://damacleod.wordpress.com/2010/03/12/installing-variable-voltage-regulator-vvr-in-a-valve-amp/ (http://damacleod.wordpress.com/2010/03/12/installing-variable-voltage-regulator-vvr-in-a-valve-amp/) +1 on that. The voltages on the preamp section are very important on these D Style amps. I did alot of experimenting with voltages via my sag simulator and found that lowering the voltages on V1 and V2 had a dramatic effect on tone and gain, not just OD but overall gain Title: Re: Strange overdrive with vvr Post by: deltacomet on February 09, 2012, 06:08:26 PM Thanks for information. All I have to do is put the vvr on the power section and make a ppimv ? or the ots already have ppimv ?
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