I have in mind in build a SE with a couple of new Telefunken YL1350 i just asquired but my valve manual doesn't has any information, if is possible to give information about.
King Regards from Menorca, Spain
King Regards from Menorca, Spain
here short: heater 12.6V, 1A, plate static 400V, UG2 200V, G1 -23V, plate current 200mA, screengrid: 8mA, slop: 22mA/V, internal Ri: 10K ohm, peak cathode current 500mA, max plate dissipation: 80W, peak plate V: 800V, , max, screen grid dissipation 8W, max screen grid DC 350V, max control grid R: 25KOhm.
hope that helps a bit..
hope that helps a bit..
Hi tubesteve, thanks for your information, do you have the curves or if is possible to know more about this monster? The load impedance and if any information about another DIY builded with this valve? Until a recently time i had use a vaccum tube online manual but it disapared from the web. I thinked is a telefunken "http://telefunkenaudiotubes.com/" but maybe the information is wrong.
Thanks for your fast reply.
Thanks for your fast reply.
Yl1350
so far i could not find a graph for itself but should be rather similar to that:
http://www.mif.pg.gda.pl/homepages/frank/sheets/129/y/YL1150.pdf
so far i could not find a graph for itself but should be rather similar to that:
http://www.mif.pg.gda.pl/homepages/frank/sheets/129/y/YL1150.pdf
YL1350 again , here a link to the datasheet w/o graph, enlarge it. hope, u can read german ( as many in your country can do) Ask Jan First ® ; electron tubes and more
Many thanks for this serious gentleman one from Croatia (my father born there) and the other a friend from Germany and living in China that gentelment talk by skype this cold afternoon of Menorca.
Yl1350
after a short research it came out that for SE at 800V plate, G2 probably at 350V. the transformer impedance should be about 2.5K Ohm. Suggest, for experiments, to tap the transformer at 2 more points. anyway, this output transformer will be a monster, too. It must be taken care, to block oscillation at the grids using grid stopper resistors, also its advisable, to purt a plate stopper close to the plate, maybe inside the plate cap (suggest inductor around 1....5uH).
The G2 DC must be very stable and low impedance. for SE it is selfunderstood, to have a good DC filtering to avoid hum. better also using a choke then.
after a short research it came out that for SE at 800V plate, G2 probably at 350V. the transformer impedance should be about 2.5K Ohm. Suggest, for experiments, to tap the transformer at 2 more points. anyway, this output transformer will be a monster, too. It must be taken care, to block oscillation at the grids using grid stopper resistors, also its advisable, to purt a plate stopper close to the plate, maybe inside the plate cap (suggest inductor around 1....5uH).
The G2 DC must be very stable and low impedance. for SE it is selfunderstood, to have a good DC filtering to avoid hum. better also using a choke then.
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