These are a great alternative to the higher priced and hard-to-find 300B tubes. The JJ 300B do have excellent musical and construction qualities.
These JJ 300B, with ceramic base, are precision factory selected in pairs or quartets. Every single tube is tested on three parameters and it is included a complete test certificate. Six months warranty.
We now stock the new super-high quality JJ audio tubes. These tubes have consistently outperformed the competition in tone and sonic performance. Quality is the best we have seen from this factory.
JJ Overview
JJ Electronic was formed in 1993 out of the privatization of Tesla company. It is located in the heart of Europe, in the Slovak Republic. With over 25 years of experience in development and manufacturing of electron tubes, our staff is ready to meet the demands of today`s HI-FI and music instruments markets. JJ ELECTRONIC manufactures tubes on proven Tesla equipment modernized with the latest technology.
JJ Testing
Every tube is electrically tested for parameters such as isolation characteristics, the electrode's current levels covering the entire operating curve, the condition of the vacuum, cathode emission capability, filament voltage and current levels. A microphonic test is performed on every tube. All tubes are then further burned-in for a period of 24 hours at the nominal specified operating voltage and current levels. Every month, a random sample is taken from the production to perform a life test of 5 000 hours at nominal operating conditions or 1000 hours at maximum specified levels.
Information on tube matching
- PaoloMi confermate la compatibilità con le RS2? (versione vecchia, non le RS2e)
- PlayStereoConfermiamo la compatibilità anche con le RS2
- PlayStereo
- Roberto Bellenziersono compatibili col modello grado sr60?
- PlayStereoSi, sono compatibili con tutte le Grado serie SR e le Alessandro Grado serie MS
- PlayStereo
- Dave Martysono i pad modello nuovo Deluxe?(ce ne sono di due tipi nel loro sito)
