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6GF5 sound fine in triode mode ?
6GF5 sound fine in triode mode ?
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Old 9th August 2011, 04:20 PM   #1
aldovan is offline aldovan  Brazil
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Default 6GF5 sound fine in triode mode ?

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Anyone have experience with the 6GF5 in triode mode as output tube ?
This tube have a good sound ?
Comments, please !

Thanks,

Aldovan
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Old 9th August 2011, 04:28 PM   #2
kevinkr is offline kevinkr  United States
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6GF5 sound fine in triode mode ?
Seems like two threads asking the same question about two different tubes could have been a single thread?
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Old 12th August 2011, 12:00 PM   #3
aldovan is offline aldovan  Brazil
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Quote:
Originally Posted by kevinkr View Post
Seems like two threads asking the same question about two different tubes could have been a single thread?
Kevin

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Old 12th August 2011, 09:34 PM   #4
ak_47_boy is offline ak_47_boy  Canada
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The 6GF5 is not too linear by the looks of the GE data sheet, but it would be better triode strapped. High plate resistance and high operating voltage too. The 18A5 curve is really, well, curved. They could be made into a nice amp... but it is too much money and trouble just to use some tubes that are probably only worth $3 each. I have never heard them bit I am always interested in peoples opinions of tubes that are not often used in hifi equipment.

Take a look at the 6p14p and 6p15p.

Last edited by ak_47_boy; 12th August 2011 at 09:53 PM.
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Old 12th August 2011, 10:35 PM   #5
aldovan is offline aldovan  Brazil
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Quote:
Originally Posted by ak_47_boy View Post
The 6GF5 is not too linear by the looks of the GE data sheet, but it would be better triode strapped. High plate resistance and high operating voltage too. The 18A5 curve is really, well, curved. They could be made into a nice amp... but it is too much money and trouble just to use some tubes that are probably only worth $3 each. I have never heard them bit I am always interested in peoples opinions of tubes that are not often used in hifi equipment.

Take a look at the 6p14p and 6p15p.
I have this tubes in my hands per U$1 each.
I will get a dozen and make a good test.
Thanks for you opinion !

Aldovan
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Old 12th August 2011, 11:40 PM   #6
smoking-amp is offline smoking-amp  United States
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"The 6GF5 is not too linear by the looks of the GE data sheet"

Where is a datasheet for the 6GF5? Nothing on Frank's site.
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Old 13th August 2011, 12:13 AM   #7
TonyTecson is offline TonyTecson  Philippines
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6GF5 sound fine in triode mode ?
here: NJ7P Tube Database Search
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Old 13th August 2011, 12:36 AM   #8
aldovan is offline aldovan  Brazil
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Quote:
Originally Posted by smoking-amp View Post
"The 6GF5 is not too linear by the looks of the GE data sheet"

Where is a datasheet for the 6GF5? Nothing on Frank's site.

I only know this datasheet in the web.
Is RCA and do not have curves:
http://www.jogis-roehrenbude.de/Roeh.../6GF5/6GF5.pdf

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Old 13th August 2011, 10:59 AM   #9
artosalo is offline artosalo  Finland
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Quote:
This tube have a good sound ?
This depends mostly on the overall circuit design, amount of NFB, output transformer and optimization of the load line and bias etc. Used output tube is only one factor.
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Old 13th August 2011, 11:42 PM   #10
aldovan is offline aldovan  Brazil
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Default Plate resistance

Quote:
Originally Posted by smoking-amp View Post
"The 6GF5 is not too linear by the looks of the GE data sheet"

Where is a datasheet for the 6GF5? Nothing on Frank's site.


In the RCA datasheet, the 6GF5 plate resistance is 260 kohms.
This value is correct ? Normally this TV tubes have about 20 kohms of plate resistance...

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