Dear Paul,
I'm glad that you are happy with the Thaedra. Would you believe that my
upgrade reduces the noise a little bit more. And also, the THD is reduced
by a factor of 5 or more. The upgraded line amp produces FULL output, that
is greater than 10 volts RMS, at 100kHz dead flat and at less than .1% thd,
all 2nd harmonic, with "rounded" overload characteristics. I'd like to see
anyone achieve this. I really am proud of this unit.
James Bongiorno
[Original Message]
From: Paul Anthony Bigelow <pbigelow@...>
To: <SAE_Talk@...>
Date: 04/25/2000 13:27:53
Subject: [SAE_Talk] Thaedra -- very quiet
Hello,
Another great quality about the Thaedra is that it
is exceptionally quiet. Despite the noise figures
given for vintage transistor equipment there is almost
always a certain level of hiss that is present when
using headphones -- regardless of the volume setting.
It is quite possible that the designers then did not
envision the sensitivity of today's modern headphone.
Anyway, it is quite annoying.
The Thaedra has no constant background hiss or hiss
of any kind, at any volume setting through the line
inputs. Only at the upper reaches of the volume control
does noise from the phono or head amp become audible.
The Stackpole switches are dead quiet. No pops or thumps.
And this is after 23 years!
Splendid performance!
Best regards,
Paul Bigelow
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