I thought about psuedo mono by splitting the power from the supply. I might play with it but that's kind of like icing on the cake after the rest is resolved.
Right.
This is a lineamp, isn't it? What is the need for first amplifying the signal and later on decreasing it? It feels like introducing more distortion than a simple voltage gain stage. If you need to drive long cables or a heavy load look at this setup.
This is a lineamp, isn't it? What is the need for first amplifying the signal and later on decreasing it? It feels like introducing more distortion than a simple voltage gain stage. If you need to drive long cables or a heavy load look at this setup.
It does have a lot of gain. Its just a pre-amp.
Interesting circuit. You have a 6N30 driving a 6N6. How's it sound?
I kind of want to go as far as possible with this circuit before dumping it. Just like increasing my knowledge of what each tube/circuit is capable of ...
Interesting circuit. You have a 6N30 driving a 6N6. How's it sound?
I kind of want to go as far as possible with this circuit before dumping it. Just like increasing my knowledge of what each tube/circuit is capable of ...
In one word, superb.
There's nothing wrong with experimenting -though my wife won't agree- one learns more than reading books only 😉
There's nothing wrong with experimenting -though my wife won't agree- one learns more than reading books only 😉
I completely agree.
I'll build it and listen. You've optimized it completely, yes? Very interesting.
This is my first 5687 circuit. Hope I can make it musical otherwise I'm going to try a couple different ones and I'll give yours a go. Thanks.
Have you tried lowering the grid stopper value? Or using a small hand wound air core coil there?
You have capacitor out. I want to stay with trans out. I like the bandwidth. Think they'll be problems dropping a OT in place of the .47?
I'll build it and listen. You've optimized it completely, yes? Very interesting.
This is my first 5687 circuit. Hope I can make it musical otherwise I'm going to try a couple different ones and I'll give yours a go. Thanks.
Have you tried lowering the grid stopper value? Or using a small hand wound air core coil there?
You have capacitor out. I want to stay with trans out. I like the bandwidth. Think they'll be problems dropping a OT in place of the .47?
phrarod said:
The circuit is optimized by Dick. The gridstopper / input capacitance allows for somewhat sloppy wiring, the most of us are guilty off. The whole story can be found here. It's a rather large download...
Looking at the circuit I think it's not handy to put an interstage transformer below the cathode. But if you wish, it's possible when you keep it at the right potential.
Disco's circuit actually does not need a grid stopper. There is no amplification or inductor in the final stage and hence no reason for it to oscillate. But neither will it do any harm - could go tens of k.ohms.
Holy Smokes! I just read Dick's PDF. Where can I source those transformers and chokes???
That looks incredible.
That looks incredible.
I hate you!
OMG now I'm lusting after that unit. Its just incredible!!!
Did you built it that way? Wow.
Still want trafo out but that's about it.
Any North American companies make these transformers? Or just give up and order direct from the mother country?
OMG now I'm lusting after that unit. Its just incredible!!!
Did you built it that way? Wow.
Still want trafo out but that's about it.
Any North American companies make these transformers? Or just give up and order direct from the mother country?
No, mine is in a wooden box.
If you want C-core output transformers I have two 5K:400 ohm units for sale. If memory serves right they're rated 50mA each. Transport will be expensive though (>3KG).
It's a rather big firm and audio has low priority. The waiting list at the moment is 12 weeks...
If you want C-core output transformers I have two 5K:400 ohm units for sale. If memory serves right they're rated 50mA each. Transport will be expensive though (>3KG).
It's a rather big firm and audio has low priority. The waiting list at the moment is 12 weeks...
I need to take this project as far as possible first or my wife will have me plugging the gear into a lamp post somewhere.
How much did all the trans and chokes run? He says his are amorphous core.
How much did all the trans and chokes run? He says his are amorphous core.
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