Split Plate Load Resistor SWitching
Moderators: pompeiisneaks, Colossal
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2thick4uni
- Posts: 16
- Joined: Tue May 30, 2006 9:14 pm
Re: Split Plate Load Resistor SWitching
Very neat arrangement, I do like the idea of using the spare triode stage to cool things down further; how much does this change the character of the amp? Would it be worth using a relay and putting it on a footswitch?
Re: Split Plate Load Resistor SWitching
V2A and V2B only share the plateload resistor so they are well isolated from each other. The unused grid is grounded so there shouldn't be a noise problem.
As long as both cathode resistors are unbypassed there shouldn't be any discernable interaction between the two stages.
You could start with a switch on the back panel and add a relay later if you want the effect to be switchable.
As long as both cathode resistors are unbypassed there shouldn't be any discernable interaction between the two stages.
You could start with a switch on the back panel and add a relay later if you want the effect to be switchable.
Re: Split Plate Load Resistor SWitching
In application, the fast/gradual switch is quite a gain killer. I tried mine out in my Komet 60 clone and it lowers the gain considerably. There is no noise though. The amp is vitually silent in both modes.
Allynmey
Allynmey
Re: The Way I do it
Tictac, How do you like the fat switch? I always wondered how these were implimented!tictac wrote:Here's how I do my split load switching. Not only is it safer to switch after the caps, with this arrangment you can use the unused triode in V2 and really tune the gain and tone of the stage with the .1 cap[/img]
Re: Split Plate Load Resistor SWitching
[In application, the fast/gradual switch is quite a gain killer. I tried mine out in my Komet 60 clone and it lowers the gain considerably. There is no noise though. The amp is vitually silent in both modes.]
That's the purpose of the fast/ grad. switch to lower the gain and fatten up the tone. However In my configuration using V2a & V2B you can adjust the "Gradual" side of the switching scheme using the proper grid and cathode resistor combination so that you lose no gain or even have more gain in "Gradual" mode.
[/quoteTictac, How do you like the fat switch? I always wondered how these were implimented!]
You basically get the input stage of either a Komet (.68) or an Express (22uf). If you use a SP3T switch you can change resistor values as well if you want to dial in the exact gain caracteristics of each circuit; although in practical application the simple switching method shown works just as well.
That's the purpose of the fast/ grad. switch to lower the gain and fatten up the tone. However In my configuration using V2a & V2B you can adjust the "Gradual" side of the switching scheme using the proper grid and cathode resistor combination so that you lose no gain or even have more gain in "Gradual" mode.
[/quoteTictac, How do you like the fat switch? I always wondered how these were implimented!]
You basically get the input stage of either a Komet (.68) or an Express (22uf). If you use a SP3T switch you can change resistor values as well if you want to dial in the exact gain caracteristics of each circuit; although in practical application the simple switching method shown works just as well.