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Hoffman Amps Forum image Author Topic: Using spare pins on power tube sockets  (Read 2895 times)

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Offline TIMBO

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Using spare pins on power tube sockets
« on: December 10, 2014, 01:12:24 pm »
Hi guys, I know it is the norm to use pin6 on power tube socket for a handy placement of the screen resistor, but what about using pin1 as a connection for the grid resistor.
This is how the Holden Wasp is done, good/bad idea?? Thanks

Offline SILVERGUN

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Re: Using spare pins on power tube sockets
« Reply #1 on: December 10, 2014, 01:31:39 pm »
Yup,,,
This is from sluckey's TDR
« Last Edit: December 10, 2014, 01:34:07 pm by SILVERGUN »

Offline alerich

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Re: Using spare pins on power tube sockets
« Reply #2 on: December 10, 2014, 01:34:24 pm »
You can use pin 1 or any other unused pin as a connection point. Just be aware that certain tube types use pin 1 while others do not.
Some of the most amazing music in history was made with equipment that's not as good as what you own right now.

Offline SILVERGUN

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Re: Using spare pins on power tube sockets
« Reply #3 on: December 10, 2014, 01:42:44 pm »
Just be aware that certain tube types use pin 1 while others do not.
Yeah,,, don't wire it like that if you ever want to switch to EL34's

Offline TIMBO

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Re: Using spare pins on power tube sockets
« Reply #4 on: December 10, 2014, 02:04:04 pm »
Thanks guys, That what I was thinking with the el34.

Offline sluckey

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Re: Using spare pins on power tube sockets
« Reply #5 on: December 10, 2014, 03:44:12 pm »
Quote
This is from sluckey's TDR
And I borrowed that idea from Fender.  :wink:
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline TIMBO

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Re: Using spare pins on power tube sockets
« Reply #6 on: December 11, 2014, 01:40:34 am »
Thanks guys,I'll remove the grid resistor from pin1 and use pin6 to hold the end. Connect pin 1&8 to the 1ohm bias resistor as I have done in most of my builds.  :icon_biggrin:

 


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