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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.

My name is Kasper Bergholt.

I use, collect, archive and photograph vacuum tubes (valves, in British English). My interests include driver-stage tubes such as the 6CS7, 12AU7A and 12HB7A; the 6CJ3 family of damper tubes; the 6X5GT and 5U3C rectifiers; and the 5881/6L6/6L6G and EL34 families of output tubes. So far, I haven't ventured into 300B or single-ended triode designs.

As the satisfied owner of a Leben CS-600 tube amplifier and a Leben RS-30EQ RIAA phono stage, I'm naturally most interested, for now, in the tubes used in these products.

Besides photographing and documenting tubes on this site, I maintain high-resolution archives for free, non-commercial use on Pbase and Wikipedia. Some of these images are also added to Wikimedia Commons for free use, and I contribute photos for tubes whose listings lack an image. I shoot with vintage Nikon and Zeiss gear.

My other interests include Tai Chi, gastronomy, Pu-erh tea and listening to music. I'm currently especially drawn to Japanese recordings across a variety of artists and genres, most of them of sublime quality, which I play through a Goldring cartridge and the Leben RS-30EQ. I also create photography-based art featuring vacuum tubes, most prominently in my Objects for an Ideal Home series, and I read, write about and curate art.

Recently, I've been working on archiving and describing texts and artifacts from the pre-web era of Danish BBS culture.

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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
Electro Harmonix, produced in Russia, 6072 tube.
6072
6028 tube (similar to 408A tube) - for use in Yamamoto DAC. Tube box marked production year of 1966. More common is the Western Electric 408A version.
6028
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
New Old Stock Western Electric 408A tube for use in a Yamamoto SoundCraft YDA-01B DAC.
408A
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
6X4WSH tube box in mint condition - Mazda / Cifté.
6X4WSH
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
5U4GB tube bough lightly used for use in a Sunbuck KSL-M7 preamplifier.
5U4GB
Common type Worldwide tube/s... ZZ
Tung-Sol KT88 power tube for use in Leben CS-600 tube amplifier.
KT88
Common type Worldwide tube/s... ZZ
British made ECC88 Tube printed 'Teonex' for use in Audio Note Kondo M77 preamplifier clone project along with a 5U3C rectifier tube, Svetlana Winged-C.
ECC88
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 6Z4P-EV (6Ц4П-ЕВ) rectifier tube produced by the Reflector factory date-marked 1966.
6Ц4П-ЕВ
Common type USSR (SU) tube/s... SU
Vintage 1962 from Russian Reflector factory. Date marked. For use in DAC along with a Siemens Halske E88CC tube.

Equivalent to Chinese 6Z4.

Equivalent but with a different pin layout to the 6X4 family.
6Ц4П
Common type USSR (SU) tube/s... SU
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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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