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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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1st Aug 2011, 6:46 am | #41 |
Nonode
Join Date: Jan 2009
Location: Papamoa Beach, Bay of Plenty, New Zealand
Posts: 2,943
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Re: Triode vs Pentode
The attached excerpt (mid-1950s) provides some interesting RF triode and pentode numbers, and I think shows why the cascode was desirable at Band III frequencies, particularly when followed by a pentode mixer. On the other hand it also explains pentode use at Band I and Band II frequencies; it was noisier than a triode, but not impossibly so. The 6AK5 was clearly very good amongst VHF pentodes , but was likely too costly for use in consumer equipment.
Cheers. |
13th Aug 2011, 6:29 am | #42 |
Nonode
Join Date: Jan 2009
Location: Papamoa Beach, Bay of Plenty, New Zealand
Posts: 2,943
|
Re: Triode vs Pentode
The attached WW item (highlighted) provides interesting comment about the Brimar 13D7 (presumably quieter than the ECC83) in comparison with pentodes for AF applications.
Cheers, |