Just to confirm heater resistor

John Roman · 2713

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Offline John Roman

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on: September 27, 2011, 04:32:29 AM
I have an Extended Foreplay III and am in the process of converting the output tubes to 6sn7's. I want to keep the 12au7 as the shunt regulator. The heater supply resistor is currently .62/5w .  That resistor should be changed to .22/5w? Correct?

Regards,
John
Extended Foreplay 3 / 300B Paramount's / BassZilla open baffle/ Music Streamer 2 / Lenovo Y560-Win7-JRMC & JPlay

Offline Paul Joppa

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Reply #1 on: September 27, 2011, 06:21:53 AM
My notes say 0.15 ohms for 1.5 amps (0.6+0.6+0.3) assuming your power line is close to 120 volts.

Paul Joppa

Offline John Roman

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Reply #2 on: September 27, 2011, 06:41:07 AM
Thanks Paul!

Regards,
John
Extended Foreplay 3 / 300B Paramount's / BassZilla open baffle/ Music Streamer 2 / Lenovo Y560-Win7-JRMC & JPlay

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