Bellari VP130 MK2 Manual

Bellari Not categorized VP130 MK2

Read below 📖 the manual in Italian for Bellari VP130 MK2 (2 pages) in the Not categorized category. This guide has been helpful for 25 people and has been rated 4.5 stars on average by 2 users

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VP130 MK2 Phono Preampliîš¿er
HEADPHONE
LEVEL
OUTPUT
LEVEL
Mute
INPUT
ground
OUTPUT
HEADPHONE
VP130 MK2
pwr
Tube Phono Preamp
Mute
Active
220pF
120pF
Cartridge Load
Capacitance
POWER
Connection guide
Salt Lake City, UT
4/19
What's in the box?
1 - Made in USA VP130 MK2
1 - 15V power supply PN PS27s
1 - This owners manual
1 - Love for great audio
SPECIFICATIONS
Cartridge Compatibility: Moving Magnet or High output Moving Coil
Gain: 38.9 dB gain @ 1kHz with 12AX7 Tube
Input Impedance: 47k ohms
Output Impedance: 8-200 ohms Headphone, 100 ohms RCA
Equalization: RIAA +/- .9 dB, 20Hz to 20kHz
THD .05% @ 1KHz
S/N Ratio: 103 dB, unweighted
Crosstalk: -75 dB
PWR: 15 VDC 500mA
Size: 6"w x 2.5"h x 5.4"d
Weight: 2 lb
The RIAA equalization curve was intended to operate as the
global industry standard for records since 1954. However, it
is almost impossible to say when the change actually took
place.
RIAA equalization is a form of pre-emphasis on recording
and de-emphasis on playback. A recording is made with the
low frequencies reduced and the high frequencies boosted,
and on playback the opposite occurs. The net result is a at
frequency response, but with attenuation of high frequency
noise such as hiss and clicks that arise from the recording
medium. Reducing the low frequencies also limits the ex-
cursions the cutter needs to make when cutting a groove.
Groove width is thus reduced, allowing more grooves to îš¿t
into a given surface area, permitting longer recording times.
This also reduces physical stresses on the stylus which
might otherwise cause distortion or groove damage during
playback.
Thank you for purchasing the VP130. We hope you enjoy
using the VP130, and that it makes listening to your music
collection rewarding. We sincerely appreciate the opportunity
to build a product for you and participate in your love of qual-
ity music and sound. We love what we do and we’re happy
to help. All Bellari products are hand built in Salt Lake City,
Utah by people who care about high quality music.
The VP130 uses one 12AX7 tube running at 150 volts. The
phono input signal is connected directly to the grid of the
tube.
Q: Do di󰀨erent tubes have di󰀨erent gain?
A: Yes, but it is not a big enough di󰀨erence to worry about.
With a 12AX7 the VP130 has 38.9 dB of gain. With a 5751
the VP130 has 37.9 of gain. Even though the 12AX7 has a
gain factor of 100 and the 5751 (12AXWA) has a gain factor
of 70 the slight decrease in max gain will not be noticeable.
Even di󰀨erent brands of tubes will have a slightly di󰀨erent
gain, but it is so small you will not hear a di󰀨erence.
Q: Do di󰀨erent tube brands have di󰀨erent specs?
A: Yes, some tubes have better specs than others. The best
tube we tested for specs in the VP130 was a N.O.S. 1960's
Mullard long plate made in Great Britain 12AX7. The THD
was improved quite a lot in our testing. The crosstalk also im-
proved. With most all tubes the frequency response and sig-
nal to noise ratio will be about the same. The bad news about
the Mullard tube is it is about a $180 tube if purchased from
a reputable tube seller. The included 12AX7 is a wonderful
sounding tube with very smooth response. Changing tubes
can be fun, but by no means necessary. The specs given for
the VP130 are with the included 12AX7.
Connecting the VP130: You have an input for the VP130
that connects to your phonograph, and the output of the
VP130 plugs into your preamp or ampliîš¿er. The ground post
is where things can get complicated. Ground hums have
always plagued the turntable. We recommend using the
ground post to connect to your turntable's ground connec-
tion. In our experience we have never seen a situation where
not using the ground would sound better than using it.
Ground loops are a very common occurrence with audio.
The more equipment you use, the higher likelihood you will
have a ground loop. The term "loop" refers to your ground
generating unwanted noise from traveling back and forth in
a loop. The turntable is usually the most likely component to
have a ground issue. Another thing you can try if you have a
ground loop is connecting the turntable ground to the RCA
jack's ground if the ground post is not remedying the issue.
One thing to keep in mind is that ground loops can be any-
where in a system so try and isolate the components that are
the issue before you spend a lot of time looking at just one
component.
TUBE TEMP:
The tube will get up to around 140 degrees fahrenheit, it will
be warm to the touch. The top chassis will also get warm
from the tube's heat. This will not be an issue as the chassis
will only get 20 degrees warmer than room temp. The entire
top of the chassis will seem hot after the VP130 has been on
for a few hours, this is normal and nothing to be concerned
about. Some tubes do run hotter than others. In our testing
the hottest tube we have seen was a NOS RCA 5751 made
in Canada it ran at 147 degrees, and did make the top of the
VP130 very warm to the touch after being on for a few hours.
This is normal and is not a cause for concern.

Product Specifications

Brand: Bellari
Category: Not categorized
Model: VP130 MK2

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