Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on August 31, 2011, 03:24:24 pm

Title: Which pot do you use for VVR ? - Which are good product for this use ?
Post by: kagliostro on August 31, 2011, 03:24:24 pm

Which pot do you use for VVR ? - Which are good product for this use ?

Thanks

Kagliostro

Title: Re: Which pot do you use for VVR ? - Which are good product for this use ?
Post by: stratele52 on August 31, 2011, 04:32:21 pm

Sorry , but what is VVR ?

Title: Re: Which pot do you use for VVR ? - Which are good product for this use ?
Post by: VMS on August 31, 2011, 04:52:15 pm

If I were to try VVR, I would probably use this one:

http://www.banzaimusic.com/PEC-MIL-MO-LIN-1M.html (http://www.banzaimusic.com/PEC-MIL-MO-LIN-1M.html)

Title: Re: Which pot do you use for VVR ? - Which are good product for this use ?
Post by: FYL on August 31, 2011, 06:36:06 pm

Quote

Which pot do you use for VVR ? - Which are good product for this use ?

Any pot rated at 500 V or more is OK. I prefer to use Mil-spec 2 W models from Clarostat, PEC or Sfernice which offer a better safety margin and are more reliable.

Title: Re: Which pot do you use for VVR ? - Which are good product for this use ?
Post by: kagliostro on September 01, 2011, 01:59:22 am

Many thanks VMS - FYL

Quote

what is VVR ?

VVR = Variable Voltage Regoulator

usually used to scale the B+ voltage of PI and Power Tubes to achieve overdrive sound also at low power output levels

may be used also to reduce the the voltage only to the Power Tubes, or to the complete amp, but this way of reduction are less used.

Here a thread about VVR

http://www.el34world.com/Forum/index.php?topic=6899.0 (http://www.el34world.com/Forum/index.php?topic=6899.0)

Kagliostro