Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on April 23, 2024, 03:38:54 pm

Title: Standby disconnecting G2 from PS (and connecting it to negative Bias Voltage)
Post by: kagliostro on April 23, 2024, 03:38:54 pm

I'm sure I asked about this way to perform a Standby here on the forum but I'm not able to remember the answer I received

(https://i.imgur.com/4esZlP9.png)

Which are the advantages and disadvantages on using this kind of Standby ?

Why not only disconnect G2 from the PS but also connect it to the negative Bias voltage ?

In a Cathode Bias amp may G2 be connected to ground instead to a negative voltage ?

Thanks

Franco

Title: Re: Standby disconnecting G2 from PS (and connecting it to negative Bias Voltage)
Post by: kagliostro on April 25, 2024, 12:28:05 pm

Whell, I've find the old thread (2014)

https://el34world.com/Forum/index.php?topic=17689.msg178461#msg178461 (https://el34world.com/Forum/index.php?topic=17689.msg178461#msg178461)

the answer, from our friend Darryl was:

Quote

...... It would ensure the output valves were completely cut off in standby.

Franco

p.s.: Reading the old thread you'll find also explanation about the reason for the relay presence