PRICE LIST / JAC-MUSIC

6SN7	Generic tube.
6SN7W	military version of 6SN7. Long life version, with 10.000 hours life
6SN7GT
6SN7GTA	Upgrade of 6SN7GT, max 450Volt Ua, 5Watt per system, 7.5Watt total. Special requirements for TV sweep applications, like higher peak power and better impulse capabilities.
6SN7GTB	Same as GTA, PLUS specified for series heating, as in TV's. Fast heat-up (11 seconds). And no, Heat-up time is not related to sound whatsoever. And yes, GTA sounds the same.
6SN7WGT	Can have same appearance as 5692
6SN7WGTA 6SN7WGTB	"W" = military version of 6SN7GTA / 6SN7GTB. Has no military sound. In fact they are the better HiFi tubes, because they were selected out of normal tubes, by the manufacturer. Must comply to better specifications. Long life version, with 10.000 hours life
6BX7	Secret tip! Data like 6SN7, but 10 watt per triode.
6BL7	Secret tip! Data like 2x 6SN7 in parallel, but 10 watt per triode.
6CG7	6SN7 in Noval socket. Check at Electro Harmonix in the menu of this website.
6DN7	One system (N) of 6SN7, other system (D) is comparable, but has 10 Watt. Great HiFi tube. Undiscovered tube
6H8C	Russian Version. Can do higher plate voltage.
6J5	1/2 Section of 6SN7, octal based tube.
7N7	Loctal socket version of 6SN7
12SN7	12 Volt version of 6SN7
12SX7	Military long-Life version, with spiral filaments. Hard to get, and sometimes expensive.
13E1	25Volt version of 6SN7.
33S30A	Swedish military versions of the 6SN7. Very rare.
33S30B	Swedish military versions of the 6SN7. Very rare.
1633	25V/0.15A heater version of the 6SN7.
5692	Military Part number, for shock-proof tube. Introduced 1948. The famous "red base". Weight is much higher, and has different construction inside. In the top-five list of most wanted 6SN7 tubes.
6042	25V/0.15A heater version of the 6SN7.
6180	military version of 6SN7, with 10.000 hours life
B65	12SN7 by Osram.
B65	6SN7 by Osram. In the top-five list of most wanted 6SN7 tubes.
CV181	military version of ECC32
CV925	military version of 12SN7
CV1986	military version of 6SN7GT. Great sounding and rare tubes like VT231
CV1988	military version of 6SN7GT. Great sounding and rare tubes like VT231
CV2627	military version of 6SN7W
CV2821	military version of ECC33
ECC31, 32,33, 34	These are NOT equivalent to 6SN7. Grid voltage, gain, transconductance are all different.
JAN 6SN7	JAN= our secret tip! JAN stands for Joint Army Navy. To be JAN specified, the tube factory must do stress test (above normal specs) on samples of standard tubes. The sample is a few percent from the whole lot, and must be taken from a table that is in the JAN handbook. From the samples tested, a certain percentage must survive. When yes, the whole lot is now life-time-expectation approved, and may now be marked with the quality prefix JAN. The samples that are actually used for the stress tests must be destroyed. JAN Specs are still in use for electronics today! JAN stands for Highest reliability. You can be happy that the average amateur has no idea at all what JAN means, and will not understand it even when explained. So they just associate it with "something military", which is not connected with good sound. So these tubes are not more expensive (great!). If you expect highest lifetime out of your tubes, our advice is: JAN = the Nr1 HiFi choice!
VT231	Military Part number, for 6SN7. P/N used until 1945, and a guarantee for real old tubes. The older Sylvania VT231 with long glass and parallel plated are beautiful, top quality, and unfortunately hard to get and expensive. In the top-five list of most wanted 6SN7 tubes. Also very exclusive are the RCA VT231 smoked glass, with Chrome getter. Also found under NU and KR brand name.

CBS/Hytron	Unique, and disappeared as a brand after the 1950s or so. Eventually was bought and merged with CBS. Construction is very similar to tall-boy Sylvania GT. Nice sound, better than many later types.
GE	Their GTA's are actually quite good, easily comparable with GTA's from other brands and exceeding some in quality. Their GTB's beat any new-production 6SN7.
Ken-Rad	Legendary for great bass and smooth slightly warm mids and highs. Considered among the best 6SN7s by many people. They mainly only had one type of construction, with angled parallel plates. Glass could be black or clear, both are built and sound the same.
RCA	GT tubes by RCA with bottom getters are regarded as a rich, smooth tube, very good tonally. Most of the GTA/GTB tubes had similar construction to the GT tubes, using the same plate stamping, mica construction, etc. The gray glass ones are similar to the clear-glass variety with the exception of the graphite-coated glass. Generally the gray glass versions are earlier than the clear glass versions.
Sylvania	One of the best manufacturers of 6SN7s, Sylvania made many varieties spanning the 1940s to 1970s. As with most tubes the earlier ones are considered to sound better. One of their notable innovations was having the plates set at angles to each other (triangular plates). One of the best brands of 6SN7 available.
Shibuara	Sercet Tip. Made tubes for some Japanese and USA companies. Long plate version, very similar to Hytron tubes or tall boy Sylvania GT (the older type).
Tung Sol	A manufacturer that did nearly everything right when it came to 6SN7s. Their early black-glass round plate versions are legendary and sought after. Their 1950s-60's GTB tall boys are quite good, better than many other brands of GTB's.

Untouched NOS since almost 50 years. These are branded CBS, but they are the RCA Types. (typical, unique construction). In military box,with stock number and German text. Printed Valvo Hamburg. On the tube base is also a German army logo (eagle). 3 pcs in OB, one in white box. Tube are the same as on the pictures, boxes are Valvo, as described here.

5692 has Tungsten heater wires, lowest microphonics, and the famous moisture proof red-base. It is rated for 500G shock, meaning you can drop it on the floor. NOS 5692 is the tube to use, when you want the BEST 6SN7 ever made.

Normal Version, with white print, White boxes.

Normal Version, with white print, Original boxes

Used, testing like new, and sold with guarantee on good functioning.

Very special filament construction, with one single U-shaped filament. This tube glows much brighter than other tubes, and also the top of the filament is lighting up. Never seen this before. First choice Collectors item. Sorry for the price, but you won't find those again. Original boxes.

No 6SN7, but 12 version of 6SN7. Original blue Mullard boxes.

National Union CNU-6SN7GT. Very beautiful and exclusive US NAVY tubes. These are the WWII series, of highest quality ever made 6SN7's. In this family is VT231, and the RCA smoked glass as well. Used in ships communication systems, made by USA workers, that knew the soldiers out there need to win the war with those. Lots of effort was made and very reliable audio tubes were needed.

These have grey glass, and you can only look in from above. Pic1 Pic2. These are either NOS, or from unused equipment.

I bought those from an experienced and reliabale collector, selling off his complete inventory. Pic1 - Pic2. These are perhaps the best 6SN7 ever made, together with 5692 and VT231 Chrome getter.

65,-

Sorry these are sold

Same as above tubes, but these are marked Ken-Rad and have the much sought VT231 part number. Te getter is visible, ust a small edge above the socket, and then the smoked coating comes. Yes it is the higher quality Chrome getter :) So REAL VT231 from WWII. This is the ultimate 6SN7. Sorry I have no camera at the moment, you can ask later if inmportant, but appearance is identical with the ones above, and from the same source.

These are uptested JAN tubes. From very nice lot of 12pcs. There is a lot of religion about GTA versus GTB in the internet. Facts are: GTA is the older type and more rare. So perhaps we must charge more for it. GTB is for no-transformer series heaters, like in Televisions. So GTB is a "must" for your Television repair. When operated with a mains transformer, GTA and GTB can be used the same way.

Nice, large yellow print, tall glass. White boxes.

Normal version, yellow print. White boxes. 8x large base. 3x small base. (check picture). The picture show dark glass, but that is shadow from the flash light. The glass is bright and totally clean, also inside.

Order
Number
114-045

Original Reflektor boxes, red boxes or blue boxes. Note: This is almost 40 years old NOS!

Beautifully, rare tube, very unusual construction, never seen it before! Original box.

Top getter flash. July 1976. These are uptested JAN tubes, from very nice lot of 15pcs. There is a lot of religion about GTA versus GTB in the internet. Facts are: GTA is the older type and more rare. So perhaps we must charge more for it. GTB is for no-transformer series heaters, like in Televisions. So GTB is a "must" for your Television repair. When operated with a mains transformer, GTA and GTB can be used the same way.

The original Chrome tops. (what's that?) From Bulk pack. These come from a music store, and were spare parts for organs. Untouched.. and These are mint quality items. Look like new and all test above 100%. Are send in matched pairs with test data

55,-
Sorry.. sold out.

Used, testing like new, and sold with guarantee on good functioning.

The original Chrome tops. (what's that?)

This is NOT a 6SN7 (see above). It is something better, but it won't replace a 6SN7.

ToshibaJapan. 6SN7-GTB. Very rare to get such a beautiful lot of NOS. Very clean, very beautifully long plate tubes, with long glass. Japanese made. Absolute mint quality items. The date code is 2H. If somebody knows when that date code was, please let us know, we can write it here. Thank you!

Original boxed. Tests very good. Unfortunately just one tube.

Nice, long glass tubes, of older construction. Clean, blue color original boxes.