Malotki V71 (High End Tab V72)

MALOTKI V71. Previos de Micrófono - Línea

Previos muy exclusivos, con los famosos transformadores Marrones de Salida Malotki. Fué la versión sin PSU interna y la que se invirtió componentes de más calidad que el V72 para fabricarlos.

Fueron recapeados y testeados (en 2022) por un ingeniero que trabajaba en la Radio de Francia en la época que se usaban.

Puedo facilitar los esquemas si los necesitáis.

Eran para llevarlos al Técnico en el fututo, pero por motivos familiares (sobre todo de espacio) estoy vendiendo algunas joyas que tengo, muy a mi pesar.

Tienen que ser enracados por un técnico con una PSU a 280v y 6.3V para alimentar las válvulas.

Se incluyen conectores Originales y 4 Válvuas EF804 NOS - nuevas con la caja original.

IMPOSIBLE ENCONTRAR UN PAR, Y MENOS EN ESTE ESTADO Y CON EL TRAFO DE SALIDA!

EL PRECIO NO ES NEGOCIABLE, ESTÁ MUY AJUSTADO! ENVIO A CARGO DEL COMPRADOR!



Información de la Web https://vunaudiotech.wordpress.com/telefunken-v72-story/:

THE V72 FAMILY

Technically speaking, there is a family of V72 type amplifiers that were built around the V72 circuit: the V71, V76, V77 and V78. The close relatives to the V72 are those units that matched the technical data of this little giant, but used a different circuit like the V72a, V72b, V72s, V74a, V70, and V77b.
The V71 was only made by Malotki and was a half size Danner module (without power supply) that incorporated the V72 circuit. The gain could be set with a resistor from 19 to 43 dB and needed an external N52 power supply.
The V72a was the TAB follow up of the V72. The circuit is quite different, incorporating an EF95 and E180F pentodes, and directly related to the V74a. The sound of this mic pre was different but was a better following/buffering amp than the V72 because it could take the higher output level of the V76 without distorting. Some people call it the poor man’s V72 because it is easier to find than the V72. Both versions, V72/74, have problems mostly with the input transformer; as they are usually either blown or missing one leg.
The V72b was the Siemens follow up of the V72; a symmetric/balanced mic pre incorporating the E283CC and the E88CC. It was completely different in design to the V72 but sonically on the same level, with better S/N ratio and inter-modulation distortion. It is a good mic-preamp but a much better mastering amp, directly related to the V70 and V77b. Like the V72a the V72b could also easily take the high output level of the V76 with way more head room.
The V76 designed and made by TAB was two V72 modules cascaded in series with additional control features. The unit was capable of achieving 76 dB of gain and driving a signal farther with little to no loss. More importantly, the unit came with a switchable input pad. This allowed the user to change the gain in 6 dB steps across 12 positions- much more control than the V72. Additionally, the V76 typically came with either an 80 Hz or 120 Hz shelf EQ (a V76s version had no shelf EQ and a full frequency repsonse from 20 Hz to 20KHz) allowing the user to get rid of rumble from the mic stand when recording voice. Although the high end frequencies sound muffled when compared to a V72, many engineers preferred the unit due to the controls, increased gain and huge bass sound that it delivers.

The V77 was a Siemens made supercharged V72 with a maximum gain of 80 dB. It produced sound like a V72 but with the gain of the V76. With an external switch (W77) the gain could be adjusted from 0 to 80 dB. Tube set-up, choke and output transformer are all identical to the V72. The input transformer is wound the same way but with a 1 to 40 ratio, because in order to get the required S/N ratio the V77 needed a different power transformer with two separate filament windings.
The V77b is a V72b that has the V77 conversion mentioned above done to it. It is considered by many to be the greatest mastering tube amp of all time.
The V78 was a general purpose or talkback version for the German radio station with an adjustable gain up to 70 dB. Sound and S/N ratio is quite different, even with the circuit and transformers being the same. The difference is because the input and output transformers are hooked up in a different way so that the unit loses its sound character. The V78 is quite easily changed back to meet the V78.