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Audio and Video Talk
Valves / Vacuum Tubes
Directly heated triodes, penthodes, ECC83 and 6J7 HE and SET world advise pls
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<blockquote data-quote="handsome" data-source="post: 829475" data-attributes="member: 772"><p>If i understand correctly: you are using a 2-stage amplifier 6SJ7 into a 2A3. </p><p>2A3 needs approximately 45V for full power - rrgo no CD player/radio/etc etc will ever be able to drive it to full power. </p><p>You like the sound without the 6SJ7 in the signal path. BUT you need a driver tube otherwise you will never get any decent levels out of the amp. </p><p>So again - you will have to try and try different preamp/driver tubes to get the sound you want. You options are:</p><p></p><p>1. Changing 6SJ7: operating points won't drastically lower its gain, </p><p></p><p>2. Operating 6SJ7 as a triode: will lower its gain, requires minimal changes - it's the simplest solution.</p><p></p><p>3. Combination of 2 and 3 trioding 6SJ7 and changing load and bias resistors, will lower gain requires component changes.</p><p></p><p>4. Other triodes: will require some rewiring of socket and component changes, lower gain.</p><p></p><p>Start with the simplest option and go from there until you find which one will suit you.......?</p></blockquote><p></p>
[QUOTE="handsome, post: 829475, member: 772"] If i understand correctly: you are using a 2-stage amplifier 6SJ7 into a 2A3. 2A3 needs approximately 45V for full power - rrgo no CD player/radio/etc etc will ever be able to drive it to full power. You like the sound without the 6SJ7 in the signal path. BUT you need a driver tube otherwise you will never get any decent levels out of the amp. So again - you will have to try and try different preamp/driver tubes to get the sound you want. You options are: 1. Changing 6SJ7: operating points won't drastically lower its gain, 2. Operating 6SJ7 as a triode: will lower its gain, requires minimal changes - it's the simplest solution. 3. Combination of 2 and 3 trioding 6SJ7 and changing load and bias resistors, will lower gain requires component changes. 4. Other triodes: will require some rewiring of socket and component changes, lower gain. Start with the simplest option and go from there until you find which one will suit you.......? [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Directly heated triodes, penthodes, ECC83 and 6J7 HE and SET world advise pls
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