Hi,
I have got my hands on an old Tektronix plug-in unit (preamplifier) for a scope (tube based)...
The unit is in very good condition and with protective cabinet. Inside is nice components and workmanship, and some tubes. 2 are 12AT6 and 3 are other in smaller housing...
Anybody now something about this unit?
I was thinking of using it as base for a tube preamp, because I like the old design and also the housing....
http://www.slack.com/images/TE/TekTypeK.jpg
I have got my hands on an old Tektronix plug-in unit (preamplifier) for a scope (tube based)...
The unit is in very good condition and with protective cabinet. Inside is nice components and workmanship, and some tubes. 2 are 12AT6 and 3 are other in smaller housing...
Anybody now something about this unit?
I was thinking of using it as base for a tube preamp, because I like the old design and also the housing....
http://www.slack.com/images/TE/TekTypeK.jpg
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If you're lucky, the components are mounted on those excellent ceramic terminal strips. If you re-use those (highly recommended!), make sure to use silver-bearing solder, otherwise the strips will fail.
Stripped and gutted, that could indeed make an excellent preamp case.
Stripped and gutted, that could indeed make an excellent preamp case.
Yes they are Telefunken, and I don't think the have been in use much...
Regarding the silver solder, why is that and where to get right solder?
Regarding the silver solder, why is that and where to get right solder?
Nearly every solder manufacturer makes a silver-bearing solder. I use a 2% silver solder (62/36/2) bought from Radio Shack- with the Euro-Nannies banning lead-containing solder, you may have to use your imagination in sourcing some there. The metallization on the ceramic strips is silver; conventional solder will dissolve it and cause the metallization to lift off.
Tektronix used to supply a small roll of the correct solder in every unit. It was on a small plastic bobbin inside the storage bin. Those were the days!
Craig
Craig
IIRC, WBT solder is 96% Sn and 4% Ag. It's costly, but it meets both HIFI and RoHS requirements.
Those TFK ECC81s will do very nicely in an "El Cheapo". Current production "reissue" TungSol 6V6s as "finals", along with good O/P "iron" would finish things off well.
Those TFK ECC81s will do very nicely in an "El Cheapo". Current production "reissue" TungSol 6V6s as "finals", along with good O/P "iron" would finish things off well.
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