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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: Hammond Galore Part 2-GM70 posted by drsx on May 29, 2015 at 22:42:18:
Unless the goal is to by back bass from the LC resonance, I don't see the need for the cap since the transformer can handle the DC current. (depending on which unit it is). I had to lower the pentode plate load to 5K due to the limited inductance but the idea is clear.
Good point on the DC breakdown. The 126 series is bifilar which means bandwidth out the wazoo on the top end at the cost of lower potential breakdown voltage. I don't recall hammond ever giving a spec for their breakdown. In the referenced schematic, I'm not sure of the goal of the transformer attached to B+ but the 1ma of current may not be such a bad idea.
dave
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