Re: More cap tuning ... The two tubes are amplifying the same ... flow, while idle, allows perfect silence to be output to the speaker, ... pass signals.... I learned of this circuit from John Broskie's www.tubecad.com site. ... (rec.audio.tubes)
Combination class A/AB Switch and post-PI Master Volume circuit idea - comments? ... I show a typical connection of phase inverter to output stage, ... using a stereo pot to cut both phases equally, or using a pot wired as ... I've tried the rheostat circuit,... I'm putting tubes into an old solid-state Univox combo that sounds ... (alt.guitar.amps)
Re: stereo amp cleaning ... Any protection circuit is there ... simply to protect the speakers from an amp failure,... I was going to mention tubes but I'd already gone on too long... ... (sci.electronics.repair)
Re: 211 and 845 operating Ea/Ia bias points. ... Anthony's suggestion (different tubes, different values, different ... I'd be interested to hear more details on the silicon pseudo choke.... I'm sure you know how to make a CCS but if you, or anyone else, don't ... A great circuit component if you're more interested in music ... (rec.audio.tubes)
Re: rating of 15.6 ohm bias resistor in ST-70 ... Scroll down to Blumlein auto bias.... Blumlein came up with an auto-bias matching circuit that ... mismatched set of output tubes by using two tubes in parallel, ... The single common cathode resistor is the winner; ... (rec.audio.tubes)
