Nos 7586 (6S51N-V=7586) Nuvistor, Radiorør Audiorør

Nos 7586 (6S51N-V=7586)medium Mu triode, Nuvistor Rør selges kr250.- pr. stk.

Ved Kjøp av 10 stk 10% avslag = Kr2250.-

Ved kjøp av 20 stk 15 % avslag = Kr4250.-

https://www.worldradiohistory.com/Archive-Catalogs/RCA/RCA-Nuvistor-Tubes-1963.p

https://frank.pocnet.net/sheets/202/7/7586.pdf

Nuvistor rør som benyttes i Musical Fidelity Nu-vista serie.....

Musical Fidelity Nu-Vista serie.

Musical Fidelity Nuvistors are among the highest performing small signal tubes with the result of huge life-tests indicating that the lot failure rate per 1.000 hours for the 7586 (type used in Musical Fidelity products) is only 0,475% at a confidence level of 95% to 10.000 hours. Kopi:https://www.audiovenue.uk/product/musical-fidelity-nuvistor-tubes/

Use in the Audio Studio

One famous audio application of the Nuvistor was in the mid-1960s Ampex MR-70, a costly studio-grade 1-inch 4-track tape recorder whose entire electronics section was based on 7895 triodes and push-pull pairs of 7587 tetrodes. The schematic of this tape recorder can be seen at [4] .

Another audio application of Nuvistors was in studio grade microphones in the mid-1960s, the AKG/Norelco C12a being a good example, which employed the 7586 triode. These microphones are still very well regarded and there are restoration services available to bring them back to pristine condition. Complete power supplies, replacement capacitors, and the 7586 valves for these microphones still come up for sale on eBay occasionally.

In the famous Neumann U47 studio condenser microphone, the Nuvistor was used as a replacement for the obsolete Telefunken VF-14 valve. The VF-14 was used in the war in portable field radios, and was not manufactured after the war, and suitable valves were selected from what limited stocks still existed. This needed considerable modifications to the microphone and its accompanying power supply, which could supply up to two microphones at the same time. This microphone was highly regarded by artists all over the world, and was used by many top recording artists such as Frank Sinatra, The Beatles, and so on. Companies still make adaptor modules for replacing the VF-14 with a 13CW4. Remarkably, I can currently see a U47 microphone, with its stand, cables and power supply on eBay for $10,999 Buy-it-now!

The 1966 U64 studio microphone was equipped with a 7586 Nuvistor from day one. The external power supply generated 6.2V DC at 135mA and 120V at 0.9mA for the valve. This solved any obsolescence issue as the 7586 was obtainable everywhere, and could easily be replaced if necessary as it was mounted in a socket.

A detailed description of the construction and mode of operation of the Neumann microphones, including the low noise built-in valve amplifier can be found at [5] .

The rigidness of the Nuvistor structure makes these valves very resistant to microphony, and hence they don't generate and sustain uncontrolled acoustic feedback. Along with low noise and low power this is a key reason why they have been used in microphones, and also in high-quality audio pre-amplifiers.

Kopi:http://www.r-type.org/articles/art-150.htm

These were employed in AKG/Norelco C-12A, C-28, and Neumann U 63 64 series Microphones.

Til bruk i vintage radioer, Rør forsterker, Rør riia, Rør dac, Rør gitar forsterker, Rør bass forsterker, Rør hodetelefon forsterker, sender og forsterker utstyr.

Aksepterer retur ved funksjonsfeil innen 14 dager, kjøper betaler frakt.