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ms660 · 14th Jul 2011, 11:15 pm

As a general address to the subject of Triode Vs Pentode...well...they just evolved that way for a particular requirement, each has its merits..depends on the design requirements and functionality
perfomance etc.
I'm not a theoretical wizzard but I do remember the use of triodes as rf amps in the old TV VHF tuners, they did the job very well and neutralization as I remember was quite a simple and in general a reliable affair.
Audio P/A?...I am staying out of that one.
Pentodes in RF (HF) yep.
Pentodes above 35 mhz carefull layout other wise there might be a knock on the door.

Cheers.

14th Jul 2011, 11:15 pm	#28
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Triode vs Pentode As a general address to the subject of Triode Vs Pentode...well...they just evolved that way for a particular requirement, each has its merits..depends on the design requirements and functionality perfomance etc. I'm not a theoretical wizzard but I do remember the use of triodes as rf amps in the old TV VHF tuners, they did the job very well and neutralization as I remember was quite a simple and in general a reliable affair. Audio P/A?...I am staying out of that one. Pentodes in RF (HF) yep. Pentodes above 35 mhz carefull layout other wise there might be a knock on the door. Cheers.