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RV-14m
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The RV-14m valve, is
the ideal replacement for the "Obsolete" Telefunken VF14m, as
used in the famous Neumann U47 / U48 microphones.
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Being
of the same physical size and appearance to the original
Telefunken VF14m, the RV-14m is a direct "Plug-in" replacement. Provided that the microphone, lead and PSU
combination, is in "Original" condition, then no electrical modifications
are required - Please see "Guarantee"
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Each valve is rigorously tested at various
stages of production and carries it's own "Serial Number".
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RV-14m, "Design
and Construction" .
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RV-14m Valve
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Customer
Feedback
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".....
the overall sound is the classic 47 ....."
Sphere
Studios, London
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"
It is really remarkable how closely it sounds to
the VF-14. The only difference I could tell, was a SLIGHT extension on the top end, that
sounds even better than it did before !!!! .....
the Microphone noise is lower as well "
Mike
Bridges, Germantown Studio, Nashville
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"
Initial
thoughts are very positive. It sounded very
similar, almost identical to my other U47
with a VF14 "
Dennis
Weinreich, Videosonics Cinema Sound, London
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" We have previously
purchased a RV-14m valve from you. It is absolutely
fantastic ! "
Marcus,
Visual Sound, Sweden
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Price
- £
290.00
including delivery and insurance within the EU.
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PLEASE
NOTE - Each
RV-14m is "Guaranteed for 1 year", from
the date Invoiced. However, the use of any RV-14m
in a modified microphone / PSU combination, that
has not been electrically approved by SATURN SOUND
Recording Services, will "Invalidate the
Guarantee".
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"Non
Standard" U47 / U48's etc.
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In cases where
electrical modifications have taken place, to the
microphone e.g. a non-standard valve type is fitted etc, then a suitable
"Retro" modification is
available. Thus
taking the microphone back to it's original
"Neumann" design/circuit.
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Technical
"Comparisons" between the RV-14m and
VF14 valves
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Test
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RV-14m
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VF14
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"Gain"
@ 1kHz
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+2.5 dB
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0 dB
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"Self Noise", measured
30Hz-20kHz
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-9 dB
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0 dB
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"Lower"
-2 dB point, ref' to
0dB @ 1kHz
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51 Hz
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42 Hz
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"Upper"
-2 dB point, ref' to
0dB @ 1kHz
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35 kHz
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37 kHz
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Note
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The above
measurements were taken using a
"Original" Neumann U47 body / pre-amp and NG type
power supply.
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The
"Test" signal was applied via a 75pF
capacitor, to simulate the capacitance of the KK47
capsule.
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As I have no
access to a "Brand New" VF14, the VF14
used for testing, was the "Best One" out
of a collection of 9 valves. Some currently in use
in microphones, the rest being "As New"
spares.
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