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Author Topic: Paramount Sensitivity  (Read 369 times)
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jdm
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« on: August 11, 2011, 09:59:22 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 
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Paul Joppa
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« Reply #1 on: August 11, 2011, 11:45:56 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.
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Paul Joppa
jdm
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« Reply #2 on: August 11, 2011, 12:42:24 PM »
Thanks Paul.  The soft start upgrade should still work with a passive attenuator in my system.

Jim
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