Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: tubenit on September 12, 2010, 06:34:04 am

Title: parallel - cascade switching?
Post by: tubenit on September 12, 2010, 06:34:04 am

Can someone tell me if I have drawn this parallel cascade switching correctly? This schematic is based on the work of a  guy ChrisM on AmpGarage who shared his schematic but I am not sure whether I've drawn the parallel cascade switch right.

I attached a SCH version that can be edited & reposted if I have not drawn it properly.

Thanks, Tubenit

Title: Re: parallel - cascode switching?
Post by: sluckey on September 12, 2010, 08:41:36 am

Quote

I am not sure whether I've drawn the parallel cascode switch right.

You mean parallel/cascade? Your circuit looks workable to me.

Title: Re: parallel - cascode switching?
Post by: PRR on September 12, 2010, 11:42:03 am

cascAde.

Your second stage is sure to overload in cascade; I guess that's the idea.

Title: Re: parallel - cascade switching?
Post by: tubeswell on September 13, 2010, 03:01:23 am

Here's another variant. Will it work? who knows? It may need 1M + dampening resistors across each side of the 2-pole plate switch. Or it may just be a heck of a lot noisier. Or both. 2CW