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Old 6th November 2011, 11:53 AM   #1
MrNudge is offline MrNudge  Australia
diyAudio Member
Join Date: Sep 2011
Location: Melbourne
Default What do do with all of these?

Hey guys.
First time posting here, but i've been coming to this site for years for info.
Over the last few months i've collected a bunch of tubes, and would like to make some amps with them, also i have some that i will gladly post to anyone who wants them, for free! (australia only, international and you'll have to pay shipping).

Here's what i have:
Mazda 12AX7 x1
Mazda ECL86 x1
*Mazda EM87 x1
Telefunken ECC83 x2
Telefunken EL95 x2
Matsushita 50EH5 x2
*Philips Miniwatt 6BD7 x1
*Philips Miniwatt 6AN7 x1
*Philips Miniwatt 6A8G x1
*Miniwatt 6AN7A x1
*Miniwatt 6N8 x1
Miniwatt 12AX7 x1
Miniwatt 6CA4 x1
Miniwatt 6GW8 x4
*Radiotron 6U7G x1
Radiotron 6L5G x1

The tubes marked with a * are up for grabs!

Also, i can post pictures if there's something that interests you.

The next thing is, what kind of stuff could i make with what i have?
can you guys recommend me some designs?
I'd really like to make a headphone amp, guitar preamp, phono preamp, and a small stereo amp.

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Old 6th November 2011, 02:24 PM   #2
DF96 is offline DF96  England
diyAudio Member
Join Date: May 2007
6GW8 is ECL86, so you have five of these. OK for low power SE or use in pairs for push-pull. The triode in these is the same as half an ECC83, so you can use these as a voltage amp or phase splitter. Google for Mullard designs.
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Old 6th November 2011, 02:31 PM   #3
diyAudio Member
Join Date: Mar 2003
Location: Zürich
And all these 12AX7s and ECC83 (they are the same tube) can be used for the phono preamp and the guitar preamp.

just be aware that the tubes are about the cheapest part of an amplifier. Decent transformers, passive components, chassis, sockets are all needed as well to make something nice and safe.
my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY!
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