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Kasper Bergholt, Denmark - Tube collection

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ID = 33776
Photo Kasper Bergholt

Below you find a part of the tube collection Kasper Bergholt.

I'm a user, collector, archiver and Copenhagen photographer of a range of vacuum tubes (valves in British English), for example driver-stage tubes such as the 6CS7 tube, the 12AU7A, the 12HB7A, the 6CJ3 family of damper tube and 6X5GT rectifier tubes, and lastly, the 5881/6L6/6L6G and EL34 family of output tubes. No 300B and single-triode designs for me so far.

Being the satisfied owner of a Leben CS-600 tube amplifier in addition to an RS30-EQ RIAA, tubes used in these products, naturally, for the time being are of most interest to me.

In addition to photographing and arching/documenting tubes on this site, I keep high-resolution archives for free, non-commercial use on Pbase & Wikipedia, some of which are added to Wikimedia for free use too, in addition to filling in the blanks for tubes that don't have an image associated with their listing. I use vintage Nikon & Zeiss gear.

Other hobbies are Tai Chi, gastronomy, Pu-Erh tea, listening to music, for the time being I'm especially interested in Japanese recordings (most of which are of sublime quality) -- through a Goldring cartridge and the Leben RS-30EQ RIAA -- of a variety of artists & genres and photography-based art featuring photos of vacuum tubes, most prominently in my 'Objects for an Ideal Home' series, in addition to reading & writing poetry.
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Excerpt from the tube collection of Kasper Bergholt. These images (tube photos) were uploaded to the respective tubes or valves by Kasper Bergholt.

General Electric 6201 NOS tube. Military-spec version of the 12AT7 / ECC81.
6201
5881 tube from Russian Sovtek
5881
American 5814A Tube - produced August 1986. Bought for use in Audio Note M1 preamplifier.
5814A
General Electric 5654 vacuum tube - marked 5654 & 6AK5W - for use in Yamamoto Sound Craft CA-04 preamplifier.
5654
12AU7WA tube from own collection - eqvuivalent to the 6180 (which this 12AU7WA NOS tube is also marked with.
12AU7WA
General Electric 12AT7WA tube. Sorry for the low quality of the print - it's been impossible to get my hands on 12AT7WAs with more visible text. For use in Leben RS-30EQ RIAA.
12AT7WA
6L6WGC tube from the Russian manufacturer Sovtek. Modern production. From own collection (came equipped in my Leben CS-600 amplifier). Text on the tube says: 5881/6L6WGC. Sovtek. Russia. Photo: Kasper Bergholt.
6L6WGC
General Electric 6DN3 Damper tube used in my Leben CS-600 tube amplifier.
6DN3
6CM3 tube produced by General Electric. New Old Stock. For use in Leben tube amplifier. From own collection. Shot with a Nikon D3 & Carl Zeiss lens.
6CM3
Close-up image of a box containing a General Electric 6CJ3 / 6DWB4 tube. Production listed on the tube as February 1976. The box contains the following serial number: 5960-00-927-2755 Photo to be under Wikimedia license - free use. 'One Eecltron Tube' GE (General Electric) 6CJ3/6DW4B Made by G.E. CO. U.S.A. (A) 33163 Date PKD 2/76.
6CJ3
6CH3 damper tube from own collection for use in Leben CS-600 tube amplifier.
6CH3
60s 6AK5W production by General Electric marked 6AK5W. For use in Yamamoto Sound Craft CA-04 line-level preamplifier. From own collection.
6AK5W
Siemens E81CC New Old Stock tube. E81CC is the special quality version of the ECC81 / 12AT7.
E81CC
Box for C.H.S. Sylvania voltage regular NOS tube produced for the U.S. Navy Text on the box: 1) For U.S. Navy - Type CHS: 38250 2) Contract NXs. 6761 3) Data - 12.11.42 (12th of November 1942) The box is for a Sylvania tube marked: OD3 & VR 150 & 38250. Camera equipment used: Nikon D3; Lens used: Milvus 55mmn F/2.0.
38250
RCA (RCA Victor Co. Inc.); N... USA
Red-base European made EZ35 tube - marked 'Produced in Germany' on the opposite side of the photo. Photo angle was chosen to show the dobule-plate construction of this EZ35, which sets it apart from some tubes in the 6X5GT branch of the same rectifier tube design. From own collection. For use in Leben RS30-EQ RIAA.
EZ35
Mullard Radio Valve Co. Ltd.; GB
EF tube marked 'EF 95' & 'Philips' + 'Import'. Produced in England by Mullard for PHilips in 1954. This tube is one of two to be used in a Japanese Yamamoto Sound Craft CA-04 line-level tube preamp - a model which has two of EF95 tubes in the driver stage.
EF95 1953
Mullard Radio Valve Co. Ltd.; GB
12AT7EH tube from Electro Harmonix, modern production of the ECC81/12AT7, made in Russia. The 12AT7EH tube is marked 2103 in yellow writing, ant its leg are markedly red. I got this tube from a Leben RS30EQ RIAA, which had it premounted.
12AT7EH
Electro-Harmonix; Long Islan... USA
Modern-day 12AU7 tube from Russian producer Tung Sol.
12AU7 1948
Common type Worldwide tube/s... ZZ
New Old Stock 12AT7 tube - one of two symetrically matched for use in Leben RS30-EQ RIAA. From own collection.
12AT7 1947
Common type Worldwide tube/s... ZZ
Tube box from a NOS 6J6W vacuum tube. From own collection.
6J6W
Common type Worldwide tube/s... ZZ
CV 455 tube, New Old Stock, presumably produced by Mullard or Brimar in the 60s. For use in Leben RS30-EQ RIAA.
CV455
Common type Worldwide tube/s... ZZ
Russian 6П3С-Е tube produced around 1980 by Russian manufacturer 'Reflector'. For use in my Leben CS-600 amplifier. Military grade = Expected life-time more than 5,000 hours.
6П3С-Е
Common type USSR (SU) tube/s... SU
Russian 6N3C tub - presumably 70s production by either Reflector or Proton. For use in Leben CS-600 tube amplifier.
6П3С
Common type USSR (SU) tube/s... SU
Vintage NOS 6189 tube produced July 1970 by American producer General Electric. Photo by: Kasper Bergholt. From own collection.
6189
Common type USA tube/semicond. USA
Close-up picture of a 884 vacuum tube from American producers RCA (Radio Corporation of America). Photographed with a Nikon D3 with a Zeiss Milvus 50mm lens.
884
Common type USA tube/semicond. USA
12AU7A tube from Japanese Hitachi. Photo: Kasper Bergholt.
12AU7A
Common type USA tube/semicond. USA
Siemens 12AT7WC tube box - NOS & NIB. 12AT7WC (US) = E81CC (EU). From own collection for use in Leben RS30-EQ, which a project of testing different 12AT7 tubes in over time and note differences.
12AT7WC
Common type USA tube/semicond. USA
New Old Stock 6X5GT/G rectifier tube produced by American Sylvania. Tube writing reads: '6X5GT/G' + 'Sylvania'. From own collection for use in Leben RS-30EQ RIAA.
6X5GT/G
Common type USA tube/semicond. USA
Close-up photograph of a vintage 6X5GT tube from RCA (American Radio Association). The tubes is from the 50's or 60's - the Golden Era of US production of vacuum tubes. 6X5GT tubes are used in for example the RS30-EQ RIAA by Japanese Hi Fi producer Leben. The 6X5GT tube in the image is a vintage NOS (New Old Stock) tube aquired from an American surplus inventory dealer. Tests NOS. 6X5GT tubes are also used in Audio Note UK products, e.g. the Audio Note DAC 3. The photo of the 6X5GT is shot with a Nikon D3 camera using a 60mm 2.8 macro lens. Read more about it <a href='url'>https://bergholt.net/en/leben-tubes#Tubes_used_in_the_Leben_RS-30EQ_RIAA</a>. The image can be freely used in non-commercial contexts, and it may sampled & modified too. Copyright: Kasper Bergholt.
6X5GT 1938
Common type USA tube/semicond. USA
Tube box containing one Sylvania 6K6GT vacuum tube. Photographed by Kasper Bergholt using a Nikon D3 & Zeiss Milvus lens.
6K6GT
Common type USA tube/semicond. USA
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Tube collector page of valve collector Kasper Bergholt as «own HP at RMorg»
As a member of Radiomuseum.org Kasper Bergholt displays items in his/her tube collection. Tubes are called valves in British oriented countries.
Valve and tube collectors as well as radio collectors are invited to join Radiomuseum.org. Every member can display separate collections of tubes, radios etc.

Kasper Bergholt started his/her tube collection (valve collection) here on 18.Apr.2023. [index-en]

  
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