Products: Cryo Valves

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.

Click below to read our rave reviews on Cryo treated valves from the following magazines.
May 2006 p123 Article by Nick Guppy Harma Cryogenically Treated Valves	April 2006 p77 Article by Tim Slater Harma Vacuum Tubes
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Name	Manufacturer	Comment	Stock	Price	Photo	Order
12BH7A/GE-CRYO	GENERAL ELECTRIC CRYO VALVES	Special Cryo Treated Version of the Original U.S.A made 12BH7A which was used by many American high ...	In stock	£32.00	Image coming soon
12DW7/7247/ECC832/GE-CRYO	GENERAL ELECTRIC CRYO VALVES	Special Cryo treated version of the Premium Industrial specification 7247/12DW7 G.E valve.The G.E ...	In stock	£32.00
12DW7/HARMA-CRYO	HARMA Cryo valves	This disimilar Triode is used in the famous Ampeg S.V.T .We have supplied countless numbers of ...	In stock	£14.00	Image coming soon
5687WB/HARMA U.S.A -Cryo	HARMA Cryo valves	These Harma 5687WB Cryo are U.S.A made original military grade specification double triode in ...	In stock	£18.00	Image coming soon
5703WB/RAYTHEON CRYO	Raytheon Cryo	Used by Musical Fidelity in a wide range of audio products. These are cryo treated versions of this ...	In stock	£16.00	Image coming soon
5842WA/417 RAYTHEON CRYO	Raytheon	Military grade 5842WA from the American Raytheon company.This is an excellent audio tube and is a ...	In stock	£25.00
5881 SELECTED BOOGIE 400 PLUS SET -CRYO	HARMA Cryo valves	Here is a special Cryo set for all you owners of the boogie 400 plus bass head who want upgraded ...	In stock	£228.00 £193.80
5881/HARMA-CRYO	Harma	Here is a special Cryo 5881 for all you owners of Marshall and Boogie amplifiers. This valve also ...	In stock	£19.00
5U4G/HARMA-CRYO	HARMA Cryo valves	Harma 5U4G is a long life Military grade Rectifier which is ideal for use in high end guitar and ...	In stock	£28.00
5Y3WGTA/SYLVANIA-CRYO	SYLVANIA CRYO	The SYLVANIA 5Y3WGTA is a long life Military grade rectifier. The valve has the classic black box ...	In stock	£24.00
6072A/G.E SELECT MIC CRYO	GENERAL ELECTRIC CRYO VALVES	Military grade 6072A/12AY7 JAN specification. This valve is the best sounding one out there. ...	Sold Out	£45.00
6111WA/PHILIPS-CRYO	Philips Cryo	This is a specially cryo treated 6111WA for use in Neumann M149 tube microphones.These benefit from ...	In stock	£40.00
6550C/SVETLANA/WINGED C CRYO	SVETLANA/WINGED C CRYO VALVES	The Svetlana 6550C is regarded as one of the best 6550 available today. These are the ORIGINAL ...	In stock	£38.00
6922/E88CC/PHILIPS-CRYO	Philips Cryo	The performance of the Cryo Philips 6922 is quite amazing. This valve has always suffered from ...	Sold Out	£18.00
6C10/G.E CRYO	GENERAL ELECTRIC CRYO VALVES	This rare triple triode that finds itself used in a small number of Fender amplifiers. This valve ...	In stock	£35.00	Image coming soon
6C4/EC90/G.E-CRYO	GENERAL ELECTRIC CRYO VALVES	Special Cryo treated version of thel G.E item that was used by Conrad Jonson and many high end ...	In stock	£15.00	Image coming soon
6GK5/6FQ5/HARMA-CRYO	HARMA Cryo valves	These specially treated cryo 6GK5 offer the Conrad Johnson owners the ulimate performance.They ...	In stock	£18.00
6H30-EB/SOVTEK-CRYO	Sovtek	The Sovtek 6H30 Pi-EB is a remarkable audio valve which offers a very linear response.This is the ...	In stock	£26.00
6L6GC/RETRO/HARMA-CRYO	HARMA Cryo valves	The Harma 6L6GC Retro is based on the famous Sylvania STR 387. The valve breaks up later than the ...	In stock	£22.00 £20.00
6L6GC/SVETLANA / WINGED C CRYO	SVETLANA/WINGED C CRYO VALVES	The design of this valve has its roots in the famous Sylvania STR387. The valve features thick mica ...	In stock	£26.00

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