Probably so. How many of each do you have?
So far I found the re34, which is a direct heated small signal triode.
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE034.pdf
The re114 is a larger DHT good for 3W anode dissipation.
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE114.pdf
And the re134 appears to be similar:
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE134.pdf
Does anyone know what Durchgrafft is? My company German-English translation book gives me "inverse amplification factor, reciprocal of amplification". If this is a direct translation then the mu of the 114 is 5 and mu of the 134 would be 10, which might be reasonable.
So far I found the re34, which is a direct heated small signal triode.
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE034.pdf
The re114 is a larger DHT good for 3W anode dissipation.
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE114.pdf
And the re134 appears to be similar:
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE134.pdf
Does anyone know what Durchgrafft is? My company German-English translation book gives me "inverse amplification factor, reciprocal of amplification". If this is a direct translation then the mu of the 114 is 5 and mu of the 134 would be 10, which might be reasonable.
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So far I found the re34, which is a direct heated small signal triode.
http://www.mif.pg.gda.pl/homepages/frank/sheets/105/r/RE034.pdf
Looks to me like a headphone amp.
Always the problem with building something from some tubes you happen to have is that (1) to use your free tube yu need to spend $100 on a transformers and (2) when the tubes needs to be repaced some years later you will not be able to find one.
You would need a low voltage transformer for the heater. Get 6.3V transformers and wire them back to back. Drop the 6.3 volts with a resistor. If you have 240V mains use a 6.3 and 12.6V transformer.
when the tubes needs to be replaced some years later you will not be able to find one.
+1
Bad enough if it is still your amp, but do you really want it to end up as 'Grandpa's old amplifier that doesn't work any more"?
put a scematic on the underside somewhere the heat wont come in a little plastic bag . note possible replacements . ( or just keep spares in a little compartment in the amp
use stuff that is available this stuf is antique sell it for a good sum whit buy now on ebay
netztrafo's pop up alot on local fleemarkets . find a standart peice of glasswhare and make something nice
use stuff that is available this stuf is antique sell it for a good sum whit buy now on ebay
netztrafo's pop up alot on local fleemarkets . find a standart peice of glasswhare and make something nice
have just two of re114, but 4 of re134 and re034. seems that the maximum obtainable power output from the re134 is only 0,5W so i would prefer try them in a linestage rather than low power set amp. how can i revise my linestage (similar to http://www.dhtrob.com/schemas/afbeeldingen/vv227lun.gif) to try them ? thanks.
Hi airegin, the schematic which you showed actually for Indirect Heat tube, but works for Direct Heat Tube. You just need a few adjustment regarding Ra's and Rk's position.
Anyway let me know if you want to let go your tubes, I'll be glad to experiment with that kind of tubes....
Anyway let me know if you want to let go your tubes, I'll be glad to experiment with that kind of tubes....
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