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Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60
  • Rörförstärkare PhonoGraph 60

Rörförstärkare PhonoGraph 60

29 900,00 kr
Inkl. moms

Rörförstärkare PhonoGraph 60 

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Rörförstärkare PhonoGraph 60 

Specifications 
Manufacturer PhonoGraph
Model name PhonoGraph 60
Catalog No. 07202012
Kind of amplifier Integrated amplifier
Type Tube
Number of channels 2
Class AB
Per channel power output 35 Watts
Output impedance 8 Ohms
Total Harmonic Distortion (THD) 0.5 %
Signal to noise ratio 104 dB
Input sensitivity 550 mV
Power consumption 300 Watts
Frequency response from 15 Hz to 60 kHz
Number of inputs 4
Source direct No
Balance No
Treble / Bass No
Loudness No
Source selector Yes
Standby mode Yes
Remote control No
Phono input No
Available front panel colors metal/black
Available front panel materials metal
Dimensions (Height/Width/Depth) 12/43/37 cm
Weight 30 kg
Suggested retail price 2170 EURO
Product review URL http://www.phonograph.pl
Product review URL http://www.wzmacniaczelampowe.pl
Product review URL http://www.facebook.com/PhonoGraphAudio
Manufacturer's product URL http://www.phonograph.pl

 

Idea which inspired the creators of phonograph PG60, was to build a classic amplifier based on proven designs and technical solutions of the highest quality components, so as to obtain the orthodox and sound quality, which was marked by a solid tube devices manufactured in the 50s of the twentieth century. Task reckless and admirable, but the design Phonograph PG60 proved to be a success - so far several dozen copies of the amplifier, which found consumers both in Poland and in Germany, the Netherlands and the United Kingdom.

A few words about Williamson amplifier design and the phonograph PG60

Williamson amplifier is described by D.T.N. Williamson in 1947, Wireless World high quality amplifier. His power level has a characteristic structure, gave a very significant contribution to the development of the art hi-fi. It is one of the first embodiment described in the literature aimed at obtaining a construction as best performance sound reproduction. It can be considered as a first-class amplifier hi-fi.

Technical advantages of the Williamson are:

- Very low harmonic distortion and intermodulation output stage with high energy efficiency.
- Low internal resistance, high resistance to changes in load impedance. This is of great importance in today's loudspeakers, which have complicated switches and their impedance varies strongly as a function of frequency.
- Redundantly designed transformers, increasing the true weight of the device, but allows for excellent low frequency transmission.

PG60 phonograph amplifier consists of four basic functional blocks. And the degree of pre-inverter (phase inverter) are constructed on the lamp 82 degree initial ECC is directly coupled to the operating phase inverter load shared system characterized by a very high symmetry. The signals from the phase inverter are not given directly to the output stage, but used an intermediate step in the system symmetric differential amplifier built on the lamp ECC 99 (the driver). This guarantees delivery to the degree of the output signal of large amplitude, and low distortion.

The output stage is built on the legendary tetradach streaming 6L6GC and works in class AB1 (first grid work only in the negative voltage). For output power 10 W lamps work in pure Class A. The output stage is coupled to the output transformer in ultra-linear system (ultra-linear).

Ultralinear system was patented in 1936 by Alan Blumlein, and first applied practically in 1951 by D. Hafler and HI Keroesa. Its characteristic feature is the local feedback loop by connecting the screen grid to tap the primary winding of the output transformer. Unhook is positioned so that the grid gets a 20 - 50% of the variable component of the anode voltage. In this way, the lamp operates in an intermediate mode between the triode (100% shielding grid signal) and pentode (0% of the signal on the mesh shield). This arrangement provides a very low harmonic distortion and intermodulation and low internal resistance only slightly worse than the triode with incomparably higher energy efficiency.

Output transformers are performed on the multi-layered moldings of a suitable coupling EI core cross-section that provides high transmission of both low and high frequencies.

Lamps final degree work with automatic constant current of rest (auto bias) which ensures stable operation of the amplifier in the whole period of operation by eliminating entirely the need for any regulation and control by the user throughout the period of the so-called. lamp life. Assembly technology is based on a combination of spatial and assembly of printed circuit techniques. This ensures complete repeatability produced amplifiers.

Electrical audio track has been designed as a pure tube technology dual-monoblock, which eliminates crosstalk and interference between channels penetration. Semiconductors have been used only in soft start circuit transformer and power delay lamp output stage of the amplifier. As the coupling elements have been applied polypropylene capacitors MKP.

The power supply of the amplifier, in order to achieve the correct impulse response, the battery runs low impedance (LOW ESR) electrolytic capacitors with very high capacitance of 2000 mF.

Appreciation

Phonograph PG60 is a beautiful audio. Housing is not like traditional tube amps, but rather a first-class design type Marantz. The housing is made of laser cutting technique entirely of pickled steel sheet steel polished - it looks very monumental. At the same time it is a fairly large device (430 x 375 x 120 cm - without lamps) and extremely heavy (30 kg). Front is thick asks steel - cut two vertical cavities in which the blue clearances installed with lighting (from the inside). In this way, these two vertical slits lit a gentle blue light during operation of the amplifier.

In the middle of the front panel is a round window (additional border chrome ring) with the name of the amplifier PG60 - highlighted in blue. Above the inscription is engraved "Williamson ultralinear Amplifier". On the sides are mounted two large knobs - also brought with polished steel. Knob on the left is the input selector (four), and on the right - control volume.
At the rear mounted three pairs of speaker terminals for the load 4 ohms, 8 ohms and 16 ohms. In the middle there are four pairs of RCA analog inputs, and the right socket. Next there are two fuses. On the back is also mounted main power switch - this solution is not very ergonomic, because the user needs to reach out far to run the equipment. When you turn on the network, light up blue lights on the front - a process of annealing of electron tubes. After about 40 - 50 seconds, the amplifier begins to play. This type of delay has a tremendous impact on the life expectancy of lamps - great that the constructor has implemented such a solution.
Phonograph used mainly manufacture tubes JJ-Electronics or (rarely) Electro-Haronix. Came to our version equipped with lamps Slovak JJ-Electronics - as I said, constructor, "has to have the greatest confidence, because most evenly hold parameters." Tubes GZ34S is 2 x 4 x 6L6GC, 2 x ECC99, 2 x 2 x ECC82 and EM84. These last two are called. magic mesh (these are NOS tubes), which is an electronic tuning indicator - indicates the voltage level of the two converging to each glowing green stripes. When the strips abut against each other, this means that the amplifier has reached its maximum level of the audio signal amplification - at a higher volume level already distortion will occur. Since I will add that in order to make the above, you have to really try and set the tone for a very high volume.
 
phono5
 
12 vacuum tubes - dominate the cult beam tetrodes 6L6 GC
 
phono6
 
At the front there are two so-called. magic mesh or NOS tubes EM84
 
phono7
 
Three pairs of taps for speaker impedance of 4, 8 and 16 Ohm
 
phono8
 
Inside there is a chic and order

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