Paramount Sensitivity

jdm · 2063

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Offline jdm

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on: August 11, 2011, 07:59:22 AM
The manual for the original 12AT7 version of the Paramount indicates that the input sensitivity is: full power at 0.625v (300B); about 0.4v (2A3).
The product description still uses these values for the soft start 6070 version.  Are they correct?

Jim 


Offline Paul Joppa

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Reply #1 on: August 11, 2011, 09:45:56 AM
Wow - good catch!

According to my calculations, the original values should have been 0.90 and 0.53 volts rms - I can't figure where those lower numbers came from. Looks like I might have divided by 2 instead of the square root of 2 when first calculated. How embarrassing!

The values for the v1.1 Paramount with 5670 drivers are 1.56 and 0.94 vRMS, for 300B and 2A3 respectively.

Paul Joppa

Offline jdm

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Reply #2 on: August 11, 2011, 10:42:24 AM
Thanks Paul.  The soft start upgrade should still work with a passive attenuator in my system.

Jim


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