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4Zh1L preamp
4Zh1L preamp
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Old 23rd April 2019, 08:01 PM   #1
Zampotech is offline Zampotech  Russian Federation
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Default 4Zh1L preamp

Interested in the topic 2P29L Preamp I decided to make my preamp.

Used 4zh1l tube
This tube in triode mode will be a good linear triode.

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Schematic diagram

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Small layout for testing

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Old 21st October 2019, 12:23 PM   #2
pieroh is offline pieroh  Germany
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Hi,
How much gain do you achieve with this circuit ....how high is the supply voltage?

Best regards
Peter
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Old 21st October 2019, 03:06 PM   #3
artosalo is offline artosalo  Finland
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Quote:
Originally Posted by pieroh View Post
How much gain do you achieve with this circuit ....
According to the anode curves, the mu is 20. And since the active load is used, the the gain is ~ mu.
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Old 21st October 2019, 04:33 PM   #4
pieroh is offline pieroh  Germany
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Quote:
Originally Posted by artosalo View Post
According to the anode curves, the mu is 20. And since the active load is used, the the gain is ~ mu.
Many thanks Arto!
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Old 22nd October 2019, 12:43 PM   #5
craigtone is offline craigtone  United States
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What did you use for B+?
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Soundsmith Boheme, WT Classic, Pearl 2, Apollo-R, Burson Swing, Hafler 915, TSE 45, ALK Klipschorns
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