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<p>Bob, that is true and I do have the tricolour manual with three
different calibration scenarios. However, I should have said I was
speaking of this in the context of 1967-1970--before the three
different calibration scenarios. By the way, I have seen yellow
and blue Dolby A labels. Were those supposed to match the colour
of the calibration in the manual?</p>
<p>While I liked what Dolby A did for the most part, I have grown to
greatly dislike it in view of my tape restoration practice. I was
pleased that everything worked out despite the lack of tones.</p>
<p>To be clear, I was NOT ADVOCATING for leaving out the tones...not
by any means...just saying when someone did, it worked as
intended.</p>
<p>The 363 was an improvement with the LEDs over the meter.</p>
<p>Cheers, <br>
</p>
<p>Richard<br>
</p>
<div class="moz-cite-prefix">On 2023-01-25 4:12 p.m., Bob Katz
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:22BEE290-58BF-471D-90F5-CD9776755917@digido.com">
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Rich, you mentioned if everyone followed the rules then you
wouldn’t need the tone. Well, as soon as elevated level came
round, the rules became very difficult to enforce. Everyone asked
“if we elevate the fluxivity, shouldn’t we elevate the Dolby
level, too?” Plus, the meters on the 361 were easily out. If you
owned a calibrator you soon learned that you could either “trust”
The meter or the internal cal voltage but rarely both. I used to
put tape marks on the meter to indicate the correct deflection.
<div><br>
</div>
<div>Bob<br>
<br>
<div dir="ltr">My iPhone made me write this. Quotes only below
this line. Nothing more to see here.
<div>----------------------------------------------------</div>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Jan 25, 2023, at 3:45 PM, Richard
L. Hess via ProAudio <a class="moz-txt-link-rfc2396E" href="mailto:proaudio@bach.pgm.com"><proaudio@bach.pgm.com></a> wrote:<br>
<br>
</blockquote>
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<blockquote type="cite">
<div dir="ltr">
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charset=UTF-8">
<p>It was...I saw a third 363 on Reverb and bought it so I
now have three pairs of CAT 300 SR/A cards, but didn't
need them, but I wasn't certain all four of mine work
100%. I do have a fourth 363 with SR-only cards. The Dolby
A decoders seemed to be OK from quick testing (I don't
have a working version of the tester, and besides, that's
for CAT22s). I no longer trust the Cat 22s and 361 frames
as the 363s seem to sound a bit better, but the big
improvement is on the SR side between the Cat 280 and the
Cat 300...and I hear (but haven't evaluated) that the SR
only cards sound better than the SR/A cards.<br>
</p>
<p>Anyway, the 185 nWb/m cal tape was most useful and I
confirmed the level against a modern MRL 250 nWb tape.</p>
<p>If everyone completely and diligently follows the rules,
the cal tones are unnecessary. <br>
</p>
<p>Speaking of this, the world needs software decoders for
Dolby A, S, and SR. It seems as if we have workable
decoders for Dolby B and C, dbx I and II, and Telcom C4. I
have not tested, but the same folks who brought us the
Telcom C4 decoder are working on Telefunken High-Com,
Nakamichi High-Com II, and CBS CX (both versions). These
three are subsets of the Telcom C4 pro system.<br>
</p>
<p>Cheers,</p>
<p>Richard<br>
</p>
<div class="moz-cite-prefix">On 2023-01-25 12:54 p.m., Scott
Dorsey wrote:<br>
</div>
<blockquote type="cite"
cite="mid:63d16cbd.RKR1wdb4oLvntr%2FT%25kludge@panix.com">
<pre class="moz-quote-pre" wrap="">Dolby A with no tones? That's kind of terrifying...
--scott
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Richard L. Hess email: <a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:richard@richardhess.com" moz-do-not-send="true">richard@richardhess.com</a>
Aurora, Ontario, Canada <a class="moz-txt-link-freetext" href="http://www.richardhess.com/" moz-do-not-send="true">http://www.richardhess.com/</a>
<a class="moz-txt-link-freetext" href="http://www.richardhess.com/tape/contact.htm" moz-do-not-send="true">http://www.richardhess.com/tape/contact.htm</a>
Quality tape transfers -- even from hard-to-play tapes.</pre>
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</blockquote>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
Richard L. Hess email: <a class="moz-txt-link-abbreviated" href="mailto:richard@richardhess.com">richard@richardhess.com</a>
Aurora, Ontario, Canada <a class="moz-txt-link-freetext" href="http://www.richardhess.com/">http://www.richardhess.com/</a>
<a class="moz-txt-link-freetext" href="http://www.richardhess.com/tape/contact.htm">http://www.richardhess.com/tape/contact.htm</a>
Quality tape transfers -- even from hard-to-play tapes.</pre>
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