|Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|5th September 2006, 07:56 AM||#1|
Join Date: Dec 2002
Location: dry ol Melbourne Australia
Switchable stages with Tubelabís hybrid MOSFET/ 845 SE amp?
Tubelabís hybrid MOSFET/ 845 SE amp,to get the most out of the 845 economically, use MOSFET stages between driver and output tube, and between input and driver tube. This reduces distortion, and allows it to run in class A2, more than doubling output.
Heresy!? . . maybe . . I will compare sans heresy
I am considering a small ďreverse experimentĒ:
Have the two MOSFET stages switchable in or out, to compare the sound (see if they sound preferable in or out) and optionally have control over output and possibly tone.
The two MOSFET stages (to my reading) join the existing circuit at seven points. So a switch that moves the MOSFETs in or out would need to join to all seven points - would this work?
My intention is build one channel, compare it via a number of speakers to something like (from http://world.std.com/~doyle/ ) Jim Doyle's 845 Version 3 amp: (LC coupled, Direct Coupled Driver Stage) 845v3.jpg . . . then replicate the channel I prefer.
Are these switchable stages feasible?
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Best MOSFET for output stages||millwood||Solid State||151||11th July 2014 01:23 PM|
|reliable tube/mosfet hybrid amp||JAZZ2250||Solid State||71||20th August 2012 05:18 PM|
|Help with hybrid mosfet valve amp||samvel65||Tubes / Valves||57||27th January 2010 11:35 PM|
|24V Tube IRF610 MOSFET Hybrid HPA||lineup||Solid State||10||23rd October 2008 02:36 AM|
|New To Site?||Need Help?|