Stocker said:Aside from shielding users from the potentials that may appear on the capacitor cans, the ugly plastic has a couple other advantages:
If you need to replace it, look at it and there the values are in plain text
Some caps are wrapped in such a manner as to contain or direct a large leak / minor explosion so that they do not turn into little bombs
I think all (most) Electrolytic Capacitors have the end of the barrel pre-stamped for "the big explosion" and I have learned way back in the day, never put your face over a circuit under test. Chances are, nowadays the barrel will let go from it's end.
I forgot, I have seen caps in custom ID'd heat shrink. Looks very nice.
TomWaits said:Please post this schematic or your favorite version of it, it sounds nice.
Shawn.
Roughtly something like this:
http://img339.imageshack.us/my.php?image=preamplificatore6ot.jpg
Hi:
Here's my newborn PP tubeamp. It uses the Siemens tetrode F2a connected in the triode mode. The driver tube is the Siemens pentode C3g (for more pics, go to my website- Siemox F2a project; I also intend to upload the shematic and measurements in the next couple of days).
Regards,
Milan
Here's my newborn PP tubeamp. It uses the Siemens tetrode F2a connected in the triode mode. The driver tube is the Siemens pentode C3g (for more pics, go to my website- Siemox F2a project; I also intend to upload the shematic and measurements in the next couple of days).
Regards,
Milan
Hi guys:
Thanks for such positive feedback. The best part is that the amp sounds even better than it looks. Pair it with a DIY AMT1/JBL123A speakers combo and you got yourself a match made in heaven.
The chassis is all DIY. I made it from eloxated aluminum plates and profiles, and it was a hell of a job. Recommended only to those with nerves of steel. Venetians are known for making even more beautiful stuff, though.
Regards,
Milan
Thanks for such positive feedback. The best part is that the amp sounds even better than it looks. Pair it with a DIY AMT1/JBL123A speakers combo and you got yourself a match made in heaven.
The chassis is all DIY. I made it from eloxated aluminum plates and profiles, and it was a hell of a job. Recommended only to those with nerves of steel. Venetians are known for making even more beautiful stuff, though.
Regards,
Milan
moamps said:Hi:
Here's my newborn PP tubeamp. It uses the Siemens tetrode F2a connected in the triode mode. The driver tube is the Siemens pentode C3g (for more pics, go to my website- Siemox F2a project; I also intend to upload the shematic and measurements in the next couple of days).
Regards,
Milan
I had a peek at your site, nice, it's all candy
What do the switches on the back do?
Shawn.
moamps said:Hi Shawn:
The one next to the mains connector is for ground lifting.
When and why do you lift the ground?
What ground are you lifting from what kind of ground?
Perhaps a schematic would answer these silly questions?
Ja Bless,
Shawn.
The questions are not at all silly.
Ground lifting refers to separating the safety ground (to which the chassis is connected) from the power ground of the amp. The ground lifting switch comes in useful to minimize or avoid altogether any ground loop problems typically associated with audio systems.
I'll try to get the schematic up over the weekend. I suspect a few pics of the inside of the amp might be welcome as well.
Regards,
Milan
Ground lifting refers to separating the safety ground (to which the chassis is connected) from the power ground of the amp. The ground lifting switch comes in useful to minimize or avoid altogether any ground loop problems typically associated with audio systems.
I'll try to get the schematic up over the weekend. I suspect a few pics of the inside of the amp might be welcome as well.
Regards,
Milan
Hi Miklos,
Very nice! I also used ECL84 (actually PCL84) for a somewhat larger PP headphone amp. It is able to drive small bookshelf speakers, too.
Tom
miklos said:Headphone amp with Russian ECL84 video tube. The output pentode section is in a cathode follower configuration.
Miklos
Very nice! I also used ECL84 (actually PCL84) for a somewhat larger PP headphone amp. It is able to drive small bookshelf speakers, too.
Tom
Attachments
Re: 801 tube preampl.
You're all lit up like a Christmas Tree, brilliant! True art! Do you have more photos, like building it and putting it together. How do you like it? Shawn.
gianis said:and a pic from my latest preampl. with 801 tube [poor foto from my mobile cam]
You're all lit up like a Christmas Tree, brilliant! True art! Do you have more photos, like building it and putting it together. How do you like it? Shawn.
My tube gear
Here are some pics of my S-5 Electronics tube amplifier and a Millett Hybrid Headphone/pre amp. I recently cased up the amplifier in a photo box that I got from a crafts store.
The amplifier has the input caps removed and acts as a power amp. The pre amp has a diamond buffer, Noble 100k pot, and Blackgate caps on the output.
Here are some pics of my S-5 Electronics tube amplifier and a Millett Hybrid Headphone/pre amp. I recently cased up the amplifier in a photo box that I got from a crafts store.
The amplifier has the input caps removed and acts as a power amp. The pre amp has a diamond buffer, Noble 100k pot, and Blackgate caps on the output.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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