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Old 24th January 2013, 09:28 PM   #1381
stajo is offline stajo  Sweden
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Quote:
Originally Posted by buzzforb View Post
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?
Click the image to open in full size.
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

Last edited by stajo; 24th January 2013 at 09:34 PM.
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Old 24th January 2013, 09:58 PM   #1382
Salas is online now Salas  Greece
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Staffan, nice. Sure its grounding and not rail ripple?
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Old 24th January 2013, 10:19 PM   #1383
stajo is offline stajo  Sweden
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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.
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Old 24th January 2013, 10:32 PM   #1384
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brummer to gnd , or elevate ?
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Old 24th January 2013, 10:36 PM   #1385
stajo is offline stajo  Sweden
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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.
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Old 24th January 2013, 10:39 PM   #1386
Salas is online now Salas  Greece
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Quote:
Originally Posted by stajo View Post
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.
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Old 24th January 2013, 10:48 PM   #1387
stajo is offline stajo  Sweden
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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.
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Old 24th January 2013, 10:49 PM   #1388
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by stajo View Post
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

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Old 24th January 2013, 10:57 PM   #1389
Salas is online now Salas  Greece
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Quote:
Originally Posted by stajo View Post
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.
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Old 24th January 2013, 11:10 PM   #1390
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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.
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