6V6 line preamp

[stajo]

Originally Posted by buzzforb

Those tubes look kinds smoky Did you compare to modern version yet?

Nice job, BTW.

I got these for my rebuild. Thinking about getting BudP to wind me some for the load

heh. Smoky Its RCA Black anode matched. well I think I have some 2-3 hundrish 6V6es laying around. What do you suggest?

I think Im gonna work me down on the current scale and skip the opt cap for a tranny instead. Theres some nicer tubes growing in 1000th around. I'll throw it to you if you catch

/S

[Salas]

Staffan, nice. Sure its grounding and not rail ripple?

[stajo]

Mmm. Rail ripple is there. But also grounding and microphonics actually. I tried a double inversed 2007 to ground but it didnt match with my other equipment. This is a start for the feeling of sound. Impedance is the cruical thing for sounds in in pre's. I also do AC heating now. I will work it thru.

[Zen Mod]

brummer to gnd , or elevate ?

[stajo]

Brummer is to ground by 2 100 k to CT, I'll see if lift goes tomorrow. I like AC. Its also touchy sensitive so I'll have a look if i have a minute tomorrow.

[Salas]

Originally Posted by stajo

Mmm. Rail ripple is there. But also grounding and microphonics actually. I tried a double inversed 2007 to ground but it didnt match with my other equipment. This is a start for the feeling of sound. Impedance is the cruical thing for sounds in in pre's. I also do AC heating now. I will work it thru.

Microphonics are minimal on mine in CF mode with the new Tungsol. Try some elastic rings between bases and chassis. Some NOS are looser than others so swap some to see which one is quieter. Can it be the chokes pick some 50Hz field also? Maybe from the AC heater cable runs.

[stajo]

Its all very rough now, but as I like the sounds I will go down on it. OPT signal has long antenna wires. As usual I started with lowish C in the filters, usually it needs to be worked up in SE.

I will start measure the rail ripple tomorrow. But, as I said, in anode followers we usually try to filter the upper rail. But think about it, we have actually 2 rails, plus and gnd. And here we're taking signal from just above gnd rail.

[Zen Mod]

Originally Posted by stajo

Brummer is to ground by 2 100 k to CT, I'll see if lift goes tomorrow. I like AC. Its also touchy sensitive so I'll have a look if i have a minute tomorrow.

whatever , I'm not worried - you're the big boy

[Salas]

Originally Posted by stajo

Its all very rough now, but as I like the sounds I will go down on it. OPT signal has long antenna wires. As usual I started with lowish C in the filters, usually it needs to be worked up in SE.

I will start measure the rail ripple tomorrow. But, as I said, in anode followers we usually try to filter the upper rail. But think about it, we have actually 2 rails, plus and gnd. And here we're taking signal from just above gnd rail.

When you will sort out the build its very clean smooth and rhythmic. My bro run some ''new disco'' style mixes on digital recording he did off his mixer at work today and it pumped.

[buzzforb]

Mine was very quiet first go round. Not until i tried tube rectifier did i have trouble, but i am a greenhorn. I had to wipe off my tablet screen when i saw that tube collection. Mine are nos rca. Tungsol sounded good enough for me to warrant the cost. If Salas' RIAA imoresses like this pre, he will fill my entire chain, with the exception of the main amp.