6418 sub mini tube amplifier

[jbivy]

Supposedly raytheon designed this pentode tube (though it was often used as a mere triode) in the late 50s for hybrid radios, transistors with sub mini tubes, to make a more powerfull "transistor" radio. Semi-rare even then.

Well.. yes, im just very anxious to play with this technology. Ive had two dates this year and not much of a social life. I just find it fun to try things that are out of my comfort zone. Well ill have my uncle to help me, he hasnt played much with tube technology in a while, but is excited to help me with it.

Ive found a few one tube radios people have built with these and even a headphone amp that uses two of these tubes. So i assume my uncle is correct in that this COULD be made into an amp that would give me some gain in my crystal set, maybe power a tiny speaker or standard headphones.

Here is dave schmarders design for a one tube regen.



and here the tube itself.



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and the link for the two tube headphone amp.

http://diyaudioprojects.com/Tubes/64...Headphone-Kit/