SRS-360 East German transmitting tubes

oshifis · 17th May 2009, 07:24 PM

I found two pieces of these babies at a cleanup... Googleing for them:

http://www.radiomuseum.org/tubes/tube_srs360.html

Are they of any good for, say a SE triode amp or something?

Colt45 · 17th May 2009, 08:19 PM

can't find too much on em. apparently equiv with a RS630.

Looks like you'll have to run ludicrous plate voltage, or grid current, or both. gonna need a gigantorg output trafo too...

http://frank.pocnet.net/short/054/3/387.pdf

Colt45 · 17th May 2009, 08:21 PM

here's paper for the western equiv, philips TB3/750
http://www.mif.pg.gda.pl/homepages/f.../t/TB3-750.pdf

oshifis · 18th May 2009, 08:19 AM

Good info, thanks a lot. Can they be operated in "starved mode", that is let's say Ua=500V, Ia=100mA in AB1 setting (no grid current)?

hemgjord · 18th May 2009, 09:40 PM

Quote:

Originally posted by oshifis
Good info, thanks a lot. Can they be operated in "starved mode", that is let's say Ua=500V, Ia=100mA in AB1 setting (no grid current)?

Looking at the tb3-750 curves above you can see that at 500V, 100mA is ON the Vg=0 curve so grid current is required to get any output.
On the other hand at 1500-1800V on the plate and a decent 10K opt 20-40W triode SE power is acheivable i A1. if you have a driver that can source some 30 mA grid current you could get some 60-70w in A2 at similar plate voltages.

But please don't even think about it if you're not comfortable with the high voltages involved.

/Olof

wrenchone · 19th May 2009, 06:18 AM

Of course. 5V/14A if a stiff requirement for heating. If you're going that far, you might as well not starve the poor beast at the plate.

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17th May 2009, 08:19 PM	#2
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	can't find too much on em. apparently equiv with a RS630. Looks like you'll have to run ludicrous plate voltage, or grid current, or both. gonna need a gigantorg output trafo too... http://frank.pocnet.net/short/054/3/387.pdf

17th May 2009, 08:21 PM	#3
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	here's paper for the western equiv, philips TB3/750 http://www.mif.pg.gda.pl/homepages/f.../t/TB3-750.pdf

18th May 2009, 08:19 AM	#4
oshifis diyAudio Member Join Date: Mar 2004 Location: Budapest, Hungary	Good info, thanks a lot. Can they be operated in "starved mode", that is let's say Ua=500V, Ia=100mA in AB1 setting (no grid current)?

19th May 2009, 06:18 AM	#6
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Of course. 5V/14A if a stiff requirement for heating. If you're going that far, you might as well not starve the poor beast at the plate.