Products > Cryo Valves > Telefunken Cryo

DEEP CYROGENTIC TREATMENT The process involves taking the vacuum tubes and freezing them down to -312 f and soaking these for a minimum of 12 hours. Then the temp is held at this low level for 24 hours. The vacuum tubes are then slowly brought up to normal levels over the next 12 hours. Metals respond very well to deep cryogenic process. The reasons are as follows. During the cooling or solidification phase of the manufacturing process, molecules are trapped in a haphazard pattern. This is down to stress caused in the bending and welding of the anode plate material.. This random placement causes obstacles for electrons and when encountered this interference can cause noise, slow down electron flow and sound deteriation affecting the quality of the sound of the vacuum tube. At very cold temperatures (below -312°F), the molecules will align in a more uniform, compact structure through the removal of kinetic energy. When the material is returned to ambient temperature, this new uniform, compact pattern is maintained, Thus changing the structure of the nickel permanently. This process makes a permanent change and the benefits do not deteriorate over time or upon return to operating temperature, it changes the whole way the vacuum tube performs. The biggest benefits I have found has been a dramatic improvement in dymanic range. Bass response has been clearer with reduction in microphonics. The really most starling fact as been how the valve operates under saturated and overdriven conditions. This has made some of the more basic Fender amps sound fuller and warmer.

Telefunken are possibly the most famous valve manufacture in the world. This German producer’s valves are engineered and made with the highest quality materials. Many of its products are considered being best of their types. Types such as ECC803s, EF804Ss, EF806S and the smooth plate 12AX7. These are just a few of an endless list of pioneering valves produced by this great German powerhouse factory that sadly is no longer with us. We have taken some of this factories best sounding valves and cryogenically treated them, the result is performance that is not matched by any other brand of valves.

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  • EF804S-TELEFUNKEN-CRYOTelefunken Cryo The EF804S was a specially made and selected valve by Telefunken that was used in high end electronics and studio ...In stock£95.00Buy Now
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