Bellari VP130 MK2 Manual

Bellari Ikke kategoriseret VP130 MK2

Læs gratis den danske manual til Bellari VP130 MK2 (4 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 26 personer og har en gennemsnitlig bedømmelse på 4.9 stjerner ud af 13.5 anmeldelser. Har du et spørgsmål om Bellari VP130 MK2, eller vil du spørge andre brugere om produktet?

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Side 1/4

VP130 MK2 Phono Preamplier

HEADPHONE

LEVEL

OUTPUT

LEVEL

Mute

INPUT

ground

OUTPUT

HEADPHONE

OUTPUT

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 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 ampli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.

Produkt Specifikationer

Mærke:	Bellari
Kategori:	Ikke kategoriseret
Model:	VP130 MK2

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