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PostPosted: 25 Sep 2017, 14:18 
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Joined: 25 Sep 2017, 13:48
Posts: 1
Location: Wevelgem, Belgium
Dear all,

I've inherited over 100 electron tubes a few months ago and I'd like to use them for building a compressor and perhaps a preamp and/or an amplifier (preferably for guitars) but I lack the knowledge for any of this...

Knowing where they came from they have probably all been tested, most of them are still in their original packing.
The guy who they are from used to work on radios and amps but this might been over 30 or 40 years ago.

A few types laying before me are PCF86, PFL200, 25Z5, AZ1, 6L6G and EBL1 but there are more of them.

I know I'll have to learn some stuff about tube types and applications (book and site recommendations are welcome) and I had a few years of electronics in high school and college but this is over 15 years ago so quite rusty and tubes were not covered. I can get some help but that guy is specialised in designing and testing hardware for 3D camera's, that's all digital electronics so probably not that useful.
So I don't know how hard it would prove to be but given proper instructions I should be able to make something out of them, it would be a shame to not use them.



PostPosted: 28 Sep 2017, 17:13 

Joined: 29 Apr 2017, 15:14
Posts: 43
might be a good idea to get a reasonable working knowledge of basic electronics.
having those tubes means nothing, if you cannot use them. there are a lot of things to know, before playing around with tubes, in particular, the extreme voltages you will encounter, that is lethal.

PostPosted: 28 Sep 2017, 22:35 
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Joined: 08 Aug 2009, 03:11
Posts: 2229
Location: Chilliwack, BC
The good thing about tubes is they are very forgiving. But as mentioned, the voltages they work at, are not (got into electronics over 40 years ago and *still* get the odd reminder about voltage :hot: :censored: :D )

There's some other common sense things too, like don't work using a metal bench... to easy to complete a circuit to ground or through an "oops", have a live table! Have power kill switches accessible easily and a small, non-water fire extinguisher handy (spark + control cleaning fluid open, has happened on commercial benches even).

As for some education, check out this page: and scroll down to "Beginners' Luck - The beginners' Guide to ..." and of course, feel free to ask questions! :beerchug:


-= Gregg =-
* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design

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