6L6 to 7027 cathode resistor value

IFixAudio · 23rd January 2012, 12:14 AM

Hey Group,
I have a Soundtronics Custom 300 that I have recapped and since it was wired for both 7027's and 6L6 I swapped to 6L6 and was wondering if the cathode resistors should be changed for improvement. The stock values were 100 ohm and I'm getting the 3 volts required for a 30mA bias but I have seen upgrades that use 1 ohm for bias adjustment.
Can/should they be changed without problems or for improvement?

Thanks

Jim

SY · 23rd January 2012, 12:22 AM

6L6GC and 7027 are the same tube with a different pinout, fwiw.

IFixAudio · 24th January 2012, 02:41 AM

SY,
Thanks, I was aware of their similarities. It was a cost driven decision.
Does anybody have any comments on the cathode resistors?

Thanks

Jim

23rd January 2012, 12:14 AM	#1
IFixAudio diyAudio Member Join Date: Jan 2007 Location: Detroit	6L6 to 7027 cathode resistor value Hey Group, I have a Soundtronics Custom 300 that I have recapped and since it was wired for both 7027's and 6L6 I swapped to 6L6 and was wondering if the cathode resistors should be changed for improvement. The stock values were 100 ohm and I'm getting the 3 volts required for a 30mA bias but I have seen upgrades that use 1 ohm for bias adjustment. Can/should they be changed without problems or for improvement? Thanks Jim

23rd January 2012, 12:22 AM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	6L6GC and 7027 are the same tube with a different pinout, fwiw. __________________ If there's a sucker born every minute, where do the rest of them come from?

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24th January 2012, 02:41 AM	#3
IFixAudio diyAudio Member Join Date: Jan 2007 Location: Detroit	SY, Thanks, I was aware of their similarities. It was a cost driven decision. Does anybody have any comments on the cathode resistors? Thanks Jim