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Kasper Bergholt, Dänemark - Röhren-Halbleitersammlung

Information - Hilfe
ID = 33776
Photo Kasper Bergholt

Nachfolgend finden Sie einen Teil der Röhren-Halbleiter-Sammlung 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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Auszug aus der Röhren-Halbleitersammlung von Kasper Bergholt. Diese Bilder hat Kasper Bergholt auf die betreffenden Bauteile geladen.

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
Chinese 6Z4 rectifier tube - marked Q (military grade), presumably produced by Shuguang. For use in DAC based on one 6Z4 rectifier tube and one 6N11 / ECC88.
6Z4_China
Common type China (PRC) tube... PRC
Westinghouse, 6X5GT, two tubes, same serial number, New Old Stock.
6X5GT 1938
Common type USA tube/semicond. USA
6X4WSH tube box in mint condition - Mazda / Cifté.
6X4WSH
5CS3 / 5Ц3С Rectifier tube produced by the Svetlana factory in 1976 accordring to the date mark on the tube.

For use in an Audio Note-inspired preamplifier circuit using one rectifier in the 5CS3 family along with two ECC81 tubes for the gain stage of the amplifier.

Needed one, bought two.
5Ц3С
Common type USSR (SU) tube/s... SU
Vintage Chinese 5Z4P rectifier tube for use in Kondo Audio Note preamplifier clone along with two Telefunken ECC81 tubes.
5Z4P
Common type China (PRC) tube... PRC
5Z3P rectifier tube produced by Chinese Shuguang. New Old Stock for use in Kondo Audio Note KSL-M77 preamplifier clone.
5Z3P
Common type China (PRC) tube... PRC
5U4GB tube bough lightly used for use in a Sunbuck KSL-M7 preamplifier.
5U4GB
Common type Worldwide tube/s... ZZ
Jan CHS VT-126B rectificer tube produced in June 1945 for theU.S. Army / U.S. Navy by Sylvania Electric Products in the USA. Photo: Jasper Bergholt. From personal collection and planned use in Leben RS-30EQ RIAA.
VT-126B
Common type USA tube/semicond. 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
Unbranded CV574 New Old Stock tube from own collection for use in Leben RS30EQ RIAA.
CV574
Common type Great Britain tu... GB
General Electric 6201 NOS tube. Military-spec version of the 12AT7 / ECC81.
6201
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
Electro Harmonix, produced in Russia, 6072 tube.
6072
American 5814A Tube - produced August 1986. Bought for use in Audio Note M1 preamplifier.
5814A
12AU7WA tube from own collection - eqvuivalent to the 6180 (which this 12AU7WA NOS tube is also marked with.
12AU7WA
12AU7A tube from Japanese Hitachi. Photo: Kasper Bergholt.
12AU7A
Common type USA tube/semicond. USA
Modern-day 12AU7 tube from Russian producer Tung Sol.
12AU7 1948
Common type Worldwide tube/s... ZZ
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
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
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
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
Chinese 6N11 driver tube for an AD1865-based DAC using one 6N11/ECC88/6JD8/6922 tube for the gain amplification and a 6Z4 rectifier tube.
6N11
Common type China (PRC) tube... PRC
Chinese-production 6N8P tube with metal base, presumably produced by Shuaguang. The 6N8P is similar to the 6SN7.
6N8P
Common type China (PRC) tube... PRC
Tube box from a NOS 6J6W vacuum tube. From own collection.
6J6W
Common type Worldwide tube/s... ZZ
Russian 6Н23 / 6N23P preamplifier tube for use in tube-based DAC instead of - or as a supplement - to classic ECC81 / E88CC tubes.
6Н23П
Common type USSR (SU) tube/s... SU
Vintage Soviet 6Н8С military-grade tube produced by the Foton factory in 1960.

For use in a preamplifier with two 6H8C driver tubes fed by a 6X5GT rectifier tube.
6Н8С
Common type USSR (SU) tube/s... SU
6CS/ tubes from General Electric marked '6CS7' and serial number 'LB 46' packaging for Italians state radio 'Tassa Radiofonica'. These 6CS's are estimated to be from the 50's or 60's. Small dark plate design. Photo by Kasper Bergholt. From own collection. For use in the driver stage of a Japanese Leben CS-600 amplifier. Photo placed under Wikimedia license and can be used freely when attributed it to its photographer.
6CS7
Common type USA tube/semicond. USA
Vintage NOS Philips PCC88 tube for use in a DAC.
PCC88 1956
Common type Europe tube/semi... EU
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Sammlerseite von Kasper Bergholt als «eigene HP bei RMorg»
Als Mitglied im Radiomuseum.org zeigt Kasper Bergholt Stücke aus seiner Sammlung. Neue Röhren oder Halbleiter legt ein Röhren-Admin an - und korrigiert allfällige Zusätze/Fehler, die Sie ihm melden.

Kasper Bergholt hatte seine Sammlung hier am 18.Apr.2023 eröffnet.
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