Submini Tube Booster Project

[Bill Bergman]

the latest pic. just a few more wires.....

[sean k]

I think Zach means putting both triodes in parallel,joined plates,grids and cathodes,and halving the plate and cathode resistors to get a bit more current coming out of the plate.A bigger river will take up less sediment to really stretch the water anology.

[ragtime8922]

I think Zach means putting both triodes in parallel,joined plates,grids and cathodes,and halving the plate and cathode resistors to get a bit more current coming out of the plate.A bigger river will take up less sediment to really stretch the water anology.

Thanks Sean and Zachary.
Actually, I have been thinking and testing a ton of things to do with that other triode for just this little boost project and it led to some extremely cool results. I now have 2 more projects in the works.

My family is starting to miss me. I've been in my work area from 6:00AM untill Midnight every day on all of my R&D stuff. Only breaks are eating, bathroom and a few brief computer minutes for e-mail and thread stuff.

You will all like the projects that are to come.....

[Bill Bergman]

:shock: I'm holding my breath! :oops:

[nelson]

Sorry but.


ooooooooo those mini tubes are soooooooooooo cute.  

[ragtime8922]

Sorry but.


ooooooooo those mini tubes are soooooooooooo cute.  

I'm glad you said that so I don't have to. :lol:

And they sound great too! Wait until you guys gear the bluesy od I have for you with the 5718 submini triode. Jazz to Blues tones. warm, warm, warm!!!

[jjs]

Bill, may I ask where You bought these neat subminiature sockets?

[Bill Bergman]

JJs,
those are 8 pin round sockests for old syle IC's. They come in quite a few configurations and styles. I found them at a local ectronic surplus store.

Ragtime8922,
what voltage are you running your tubes at?

[jrc4558]

Hey!
Once we're on the subject...
Does anybody knows what are the tubes numbered 5798? 7pins, sub-mini

[Bill Bergman]

Plugged it in, got 137vdc. Heaters did't come up. Got some smoke. Luckly it was just from the resistors I had in series to drop the 7vac to 6vac. Guess they weren't high enough watt rating for the current plus wasn't the right ohms with all 3 tubes heaters. I had tested the resistors on one tube only not all 3 at once.

Ragtime, if you want me to stop hijacking your thread, just let me know.

[ragtime8922]

Plugged it in, got 137vdc. Heaters did't come up. Got some smoke. Luckly it was just from the resistors I had in series to drop the 7vac to 6vac. Guess they weren't high enough watt rating for the current plus wasn't the right ohms with all 3 tubes heaters. I had tested the resistors on one tube only not all 3 at once.

Ragtime, if you want me to stop hijacking your thread, just let me know.

:lol: No way Bill, your comments are VERY welcome around me. I love subminis and the unique tones they provide. I am running my tubes at 165 volts. I know Zvex is running his at like 225 volts. I'm happy with the 165 volts plus that is all I can get out of my torroid tranny so no need to R&D this particular circuit at higher voltages. Future projects may use more voltage but physical size is an issue right now.

If you are smoking resistors then try like 2, 3 or even 5 watt resistors for the power supply. In the preamp section I suggest using the lowest possible wattage ratings because they have less noise. But make sure they are high enough by running them for long periods of time in your testing. 1/2watt for mine.

Wow, I'm gonna have a big treat for you guys. I just don't want to release anything else til I have it (them) perfect. I'm real close....

[Bill Bergman]

Thanks Ragtime,
I've got 2 more 5902's coming in the mail.

[ragtime8922]

5902's are awesome tubes. Are you going with SE Class A?