should i change the operating point ?

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

I just finished building a SEP 6L6 with 6SL7GT driver tube 5V4GA rectifier. Simple 2 stage amp ala RH schematic with plate to plate fb. The B+ is 300vdc which for the 6L6, yields a Av of 286v , G2 is 242v, and with the 226 ohm Cathode resistor idle current is 57 ma.
The 6SL7 has a B+ of 220vdc with 10K plate resistor Av is 180v and its Cathode resistor is 370R which yields a current of about 1.8ma.
I am thinking i should up the driver tube current or maybe use a LED for a slight update from 1940s technology. What do you all think? cheers. Dak

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Topic - should i change the operating point ? - DAK 17:56:19 04/19/17 (5)

RE: should i change the operating point ? - Triode_Kingdom 19:43:50 04/19/17 (4)

RE: should i change the operating point ? - DAK 20:50:16 04/19/17 (3)

You might want to look again - Chip647 05:03:50 04/20/17 (2)

RE: You might want to look again - Tre' 11:14:11 04/20/17 (0)

I forgot the anode to anode feedback resistor - DAK 09:02:17 04/20/17 (0)

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