Triode connected pentode.
- pre65
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#1 Triode connected pentode.
If the data sheet for a pentode connected as a triode (typical characteristics) specifies grid 3 as 0v, does that mean no connection ?
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Edmund Burke
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#2 Re: Triode connected pentode.
Nope it means grid 3 is either:pre65 wrote:If the data sheet for a pentode connected as a triode (typical characteristics) specifies grid 3 as 0v, does that mean no connection ?
a) grounded independently
b) grounded via its (if fitted) internal connection to a grounded cathode.
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- pre65
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#3 Re: Triode connected pentode.
In that case it must be grounded, I should have realised that. Doh.SteveTheShadow wrote:Nope it means grid 3 is either:pre65 wrote:If the data sheet for a pentode connected as a triode (typical characteristics) specifies grid 3 as 0v, does that mean no connection ?
a) grounded
b) is internally connected to the cathode (as most are) and the cathode is grounded.
Thanks Steve.
The only thing necessary for the triumph of evil is for good men to do nothing.
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#4
If it is not internally connected to cathode as in case of EL34 and 813 to name a few you can connect it to anode with g2 via 100ohm resistor which will be marginally different performance.
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#5
Typically on a datasheet cathode is at 0V, so then g3 is connected to 0V. But as said with internally connected designs you don't get a choice.
HTH
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#6
I would beware that you are not reading too much into that. By definition in most data sheets the cathode is 0v, so g3 at 0v just means its connected to the cathode.Mike H wrote:Typically on a datasheet cathode is at 0V, so then g3 is connected to 0V. But as said with internally connected designs you don't get a choice.
HTH
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