• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

A small no-fuss pentode/pentode SE amp

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Tubes4e4

Tubes4e4

Member
Joined 2005
Gentlemen,

here is another project I completed:

http://www.tubes.mynetcologne.de/roehren/6v6se/6v6se_e.html

It was intended as a birthday present for a friend to be used in a small room with small bookshelf speakers.

It is a small 4,5 Watt/channel pentode/pentode single ended integrated which gives a damn on all this "single ended triode without any negative feedback" madness.

Instead, it is a no-fuss, well-engineered, solid all-pentode circuit amp, which simply does what it is expected to do.

If you are interested in the circuit development process, you can find it described extensively in the form of a moderate level walkthrough, starting at:

http://www.tubes.mynetcologne.de/roehren/6v6se/schematics_e.html

May this walkthrough help other tube DIY amp enthusiasts construct and enjoy their own "no fuss" amps and bring back a wee bit of solid engineering in this world of audiophool madness.

I would like to thank the crowd at "The G33k Zone" http://geek.scorpiorising.ca/GeeK_ZonE/index.php who helped a lot in making the schematics section walkthrough come true.

I wish you and your relatives a great new year!

Tom
 
Tubes4e4

Tubes4e4

Member
Joined 2005
Hi Giaime,

Giaime said:
Are the OT avabile on the Net or are them from a local manufacturer? They seem interesting, with all those primary connections... And I assume they're pretty cheap.
Click to expand...

They are from Gerd Reinhöfer, a German winder. His site can be found here:

www.roehrentechnik.de

The ones being used in this project are intended for "experimentation", therefore all the taps.

Although experimentation types, they perform well enough to have made it into this amp finally.

Tom
 
Tubes4e4

Tubes4e4

Member
Joined 2005
Hi Phil,

kopite said:
Where do you get the mounting boards for the components please?
Click to expand...

Those solder tag strips are still available at local electronic components shops over here in Germany - they still are in production.

Also, they are available at any well sorted E-parts mail order company here in Germany, called "Lötleisten" over here.

There are many web shops for DIY guitar amp gear that stock them, too.

I like them - they allow a components placing and wiring technique somewhere in the middle between the extremes of PCBs and pure point-to-point wiring.

Tom
 
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