Hi guys!
I want to build a guitar preamp with one or two PCL86 valves.
I have two of them, I also have a transformer that I got from the same gramophone of wich i took the valves. I've got 2 output 5'6k transformers as well.
What can I do with all of this? I just want valve clipping.
Have a nice day.
I want to build a guitar preamp with one or two PCL86 valves.
I have two of them, I also have a transformer that I got from the same gramophone of wich i took the valves. I've got 2 output 5'6k transformers as well.
What can I do with all of this? I just want valve clipping.
Have a nice day.
http://licho.rowerpower.org/gitara/practic2_lite.gif
Note that ecl86 is the same tube but with a 6.3 volts heater requirement. The triode section of the PCL86 is like a 1/2 12AX7.
Note that ecl86 is the same tube but with a 6.3 volts heater requirement. The triode section of the PCL86 is like a 1/2 12AX7.
That schematic could be modified using the extra pentode section (triode connected) as a cathode follower driving the tone stack and you won't need another tube but it won't do heavy distortion.
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No no, money is not a problem at all... And 4,50 is nothing.
The problem is that I can't buy things from the internet, I'm 16, so no paypal, no credit card, no nothing.
@Stalker: One of the wires were not removed from the transformer so I think it's well wired. It's not the first transofrmer I use.
Can't I use one of the pentodes as a preamp stage?
You don't need to buy another tube. You can pursue 2 options: either build a Vox AC15 type amp, using the spare PCL86 power pentode as an input tube for one of 2 channels, or build a high gain type amp using 3 triodes in series, with 1 triode made from the PCL86 pentode strapped as a triode.
It would actually look a lot like the schematic already posted, except the order would be PCL86 triode -> PCL86 triode -> PCL86 pentode-as-triode -> PCL86 pentode.
I'll have a look to see if I can find suitable curves or data to pick a good operating point for the triode strapped pentode
Thanks a lot.
But, isn't is what you say the same as Stalker said in the tenth post? (http://www.diyaudio.com/forums/tube...tube-pre-amp-guitar-any-idea.html#post2318751)
But, isn't is what you say the same as Stalker said in the tenth post? (http://www.diyaudio.com/forums/tube...tube-pre-amp-guitar-any-idea.html#post2318751)
Don't worry, I take a lot of care when doing electronics, if you check my profile it says that I also do some other electronics so I'm used to take care of safety. Anyway I almost got blind with my most powerful lasers... accidents will happen. Wear always safety gear on!
If he's right, then awesome, I'm waiting for instructions on what I especifacally have to do. This forum is way more useful than a lot of other forum where noobs are just hated to death, like if everyone were born knowing all that they know.
And yeah, I'm just 16... hope people here don't hate me just for my age, just like in other sites.
The trafo was inside the gramophone of wich i took the valves of. It vibrates fully unloaded, that is: AC 220V Mains->Trafo
Nothing more on the setup. I read googling about it that is normal, depends on the quiality of the trafo, but... it scares the hell out me, lol.
If he's right, then awesome, I'm waiting for instructions on what I especifacally have to do. This forum is way more useful than a lot of other forum where noobs are just hated to death, like if everyone were born knowing all that they know.
And yeah, I'm just 16... hope people here don't hate me just for my age, just like in other sites.
The trafo was inside the gramophone of wich i took the valves of. It vibrates fully unloaded, that is: AC 220V Mains->Trafo
Nothing more on the setup. I read googling about it that is normal, depends on the quiality of the trafo, but... it scares the hell out me, lol.
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