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Title: transformers Post by: Opcom on February 08, 2015, 11:39:53 AM Found this, at the bottom is an OPT for 811's. 350W 1500V rating. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
http://www.vt4c.com/shop/program/main.php?cat_id=112&group_id=7&hit_cat= These control transformers have a 4000VAC hi-pot rating. Might be good for modulation, especially cathode mod. http://www.mci-tran.com/C49.html https://www.edcorusa.com/ampoutput This one has transformers to match speaker to line. They have line voltages not only 25 and 70V but also up to 140V, which is enough to drive 3-500Z grids, which require 100-150V per grid at high current and are not easily matched by the usual modulation driver transformers designed for high-Z tubes like the 304TH, 810. I have not tried these, just saw them. |