Pinnacle?

Han llegado a mis manos unas 12ax7 de marca "Pinnacle", alguien sabe quién las pudo fabricar?,supongo que serán remarcadas

esa marca existe no es remarque, yo tengo algunas

Si subes una foto seguro que lo averiguaremos, puede ser originaria de muchas fabricas diferentes...

He encontrado esto:



 Hi_Q 
diyAudio Member



Join Date: Oct 2007
Hi SD, Just to put you in the picture about Pinnacle Tubes.
Pinnacle were a non-manufacturing company, they were what we call box shifters. They acquired Tubes from various places like Italy, Russia, Japan and yes even some military surplus bulk stock.
Needless to say, their main criterion was to get them at lowest cost, even un-boxed if necessary, then put their own brand name 'Pinnacle' on them. They then put them into Pinnacle boxes and offered them for sale at a lower price than a Mullard or Brimar etc.
Another company called Z & I Aero did similar as also another called DeBanks who added a twist, They supplied you with fully stocked Tube cabinets for your workshop. A salesman would visit once a month to replace Tubes that had been used and you paid for the replacements. It is possible that Pinnacle had a similar arrangement with radio/TV repair shops and it was rumoured that DeBanks were in fact Pinnacle operating under another name.
As Tubes were being phased out, DeBanks started supplying Transistors, Diodes and Integrated Circuits. I think the gradual disappearance of repair shops here in the UK meant ever decreasing sales and DeBanks eventually ceased trading.
So you cannot ever find a detailed specification sheet for a Pinnacle Tube but it is probably quite OK to use another manufacturers data sheet as the characteristics need not necessarily be too far different. In fact, Pinnacle and DeBanks tubes work very well and I had a pair of 6146 tubes from Z & I working in the final of my ham rig for many years without problems.
Best Regards
Les


Parece que sí,que son rebranded.

Fotos:
http://www.casimages.es/i/150502062611525366.jpg.html

Tungsram hecha en Hungria a finales de los 60's primeros 70's, buena valvula

Muchas gracias!,son nos, que valor puedan tener en el mercado?

unos 30-50€

Unidad?,o el par?

El par, si estan emparejadas en valores nos y con las secciones de cada valvula balanceadas, en sus cajas originales y con los prints en buen estado, 40€ estarían bien vendidas, pero los precios en valvulas nos son muy cambiantes, lo que hoy vale 40 mañana 80 y pasado mañana 10....

Las compré para mi meixing mingda mc368, no tenía 12ax7 y estava usando unas rusas 6n2p-ev con adaptador, pero me mosquea que el consumo del filamento sera mucho mayor que el de una ecc83 normal, aunque, se supone que el transformador estará suficientemente preparado para esta carga extra, verdad?, o mejor no jugársela y poner ecc83 que es para la válvula que está diseñado?, no se, ante la duda me quedo con estas,no tengo presupuesto para comprar unas mejor valoradas, y me alegro de que hayan salido bien.

Por cierto...¿como te iban las 6n2p-eb?

Muy muy bien,las comparé con unas rca 12ax7 top clear y las rusas para nada sonaban peor,y sin apenas rodaje,por eso me despreocupé por buscar recambios para la 12ax7 y ahora ando buscando algo.