2021-10-12 · Abstract. Nitrate is an increasingly important component of fine particulate matter ( PM 2.5 ) in Chinese cities. The production of nitrate is not only related to the abundance of its precursor, but it is also supported by the atmospheric photochemical oxidants, raising a new challenge for the current emission control actions in China.

ECC82 Siemens NOS/NIB. This SIEMENS labeld ECC82 is born as Ei (Yugo) smooth plate 12AU7 / ECC82 in the late 1970s to the early 1980s at the heyday of the tube production in Yugoslavia. Made with Telefunken and Philips tooling, these tubes sound much like Telefunken smooth plates; this is a very open and extended tube.

2021-11-3 · The latest movie news, trailers, reviews, and more.

2020-11-5 · Adakitic rocks are intermediate-acid magmatic rocks characterized by enrichment in light rare-earth elements, depletion in heavy rare-earth elements, positive to negligible Eu and Sr anomalies, and high La/Yb and Sr/Y ratios. Cenozoic adakitic rocks generated by partial melting of subducted oceanic crust (slab) under eclogite-facies conditions (i.e., the original definition of …

2020-6-20 · These test high grade so should probably be avoided in the most sensitive V1 spot, but are fine for V2 and down the line. May be blank or with various labels. Some are mislabeled National 5751 but are clearly NOS beijing …

EL34 / 6CA7 / KT77. EL84 / 6BQ5 / SV83. Fender Amp Tube Sets. KT66. KT88 / KT90 / KT120. Marshall Amp Tube Sets. Pedals. Power Tubes. Preamp Tubes.

 · I''ve got a modest collection of NOS 5751s that includes about 40 of the 1980s production JAN Philips 5751s, about 35 1980s production JAN GE 5751s, some old Sylvanias (great) an RCA "Command Series" and an old GE 5 star 5751. The JAN Philips 5751 consistently test stronger for output and transconductance than the other 5751s.

Silver Screen Rentals (grip equipment) (as Silver Screen Supply) Silver Screen Rentals (production supplies) (as Silver Screen Supply) Smécky Studios (music recorded at) Soundfirm, Beijing (additional adr recording) Soundtrack New York …

2021-11-29 · KPMG is a global network of professional firms providing Audit, Tax and Advisory services.

Current production bulbs remain the same in the case of appearance and same as NOS, but their sonic qualities might be very different. After new market established itself many things changed. Like NOS,the new stock seems to have good and …

2021-11-23 · Welcome to Diesel Online Store: the innovative lifestyle company, producing a wide-ranging collection of jeans, clothing and accessories

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2015-8-14 · So, the grid is often plated with a metal that is less prone to secondary emission, such as gold. Special surface finishing is also used to help prevent secondary emission. A tube with only one grid is a TRIODE. The most widely …

2021-11-26 · New Old Stock in whiteboxes and original boxes. These are the undisputed peak quality of an American made 12AX7. The 1948-1955 production was special, these tubes sound better than any other USA made 12AX7. Sweetness mated with sparkle at the top, the famous RCA warmth at the bottom, with an accurate 3D sonic image.

The Electro Harmonix EL84 provides excellent performance in both audio and guitar applications. The valves has been designed recreate the sound and performance of the classic European EL84 It crunches sooner and the distortion …

2017-10-1 · We are grateful for support from the National Natural Science Foundation of China (Grant Nos. 51005187, 51375398), Fundamental Research Funds for the Central Universities (Grant No. 3102017JC04003), 111 Project (Grant No. B13044), Fundamental Research Funds of ShenZhen City (JCYJ2016022917313), and the Special Scientific Research on Civil ...

2006-4-10 · ECC83 E.I Silver plate 2001 production ECC83 E.I Grey plate 2002 production ECC83 E.I.Elites ECC83S JJ/TESLA 2002 production ECC83-STR HARMA (Selected ECC83S) 12AX7 SVETLANA 2002 production Distributor selected 12AX7A-C RUBY SELECT new China production 12AX7 EH SOVTEK 2001 and 2002 production 12AX7 LPS SOVTEK 2000, 2001 …

2021-10-8 · So yes there fakes, but I am telling you so here. At least they test very nice and they are NOS tubes. Price is 85 Euro one. Test values for both Gm and plate current are excellent, and I put that on the boxes with a removable sticker. Test data is actually perfect. So the price is just the normal price for good USA NOS 12AX7.

 · Introduction The following information I have gathered while shopping around after I got bitten by the glowy amp bug. As I shopped I started gathering all kinds of information about electron tubes and was left with a lot more questions. All of this information is researched, as opposed to personal experience, and I thought it would be fun to put it up for discussion :) The …

NOS Chinese Military 6N4-J (12AX7) Tube - Square Getter, Made in Beijing. Up for sale is a 6N4-J tube. 6N4 is the Chinese military''s designation for the …

Price: From $12.00 to $42.00. This Philips JAN 6922 is a military spec 6DJ8 / ECC88 tube type. It was made in the USA by Sylvania. It has silver risers, a flat disc shield, and a halo getter. Click "more info" for current availability. Philips JAN 6922 / 6DJ8 - …

But the 6SN7GT is arguably the best general-purpose audio triode. Its large octal format is more rugged and less prone to intermittent pin connections than miniature type. Its mu of 20 is a nice compromise between the old low-mu types and low …

-- (゜-゜)つロ ~-bilibili. . . . . . . . .

12AX7 COMPARISONS ~ Best and Worst . Telefunken ECC803S (E83CC) In my opinion these are simply the best. Very hard to find, this tube is Vintage and Extra Rare! The ECC803S is a very low noise, special quality 12AX7, made with the old-style Telefunken German precision.

ECC83/ 12AX7A-C-TAD RT001 Tube Amp Doctor This is the latest and improved version of the current Chinese 12AX7 and the factory have made great improvements in ... In stock £13.50 Buy Now; ECC83/ 12AX7A-TUNG SOL RU Tung-Sol Russia The Russian Tung sol ECC83/12AX7 is a remake of the classic designed 12AX7 from the early 1960s. The valve displays ...

NOS Chinese Military 6N4-J (12AX7) Tube - Square Getter, Made in Beijing. Up for sale is a 6N4-J tube. 6N4 is the Chinese military''s designation for the 12AX7/ECC83 tube. Many tube amps from the late 80s and early 90s were …

 · 2) NOS Beijing-production Silver Special 12AX7 (Vibrato channel preamp) 3) NOS PHilips JAN 12AT7WC (reverb tank driver) 4) Reflektor-production Tung-Sol 12AX7 (reverb recovery/mixer) 5) Any 12AX7 that still lights up (tremelo oscillator) 6) NOS Mullard CV-4024/12At7WA (phase inverter) 7) NOS JAN Philips 7581A (power tube)

2021-4-6 · Now, I think Russian NOS EL84 is the best you can buy. Just this ''made in Germany'' on the tubes, means they''re either Philips, TFK or Siemens. Reality is, they are made by Reflektor in the Ukraine. KT66 GEC FAKES . This one is faked on massive scale. Production machines were sold long ago to the Chinese, who said thank you.

2018-1-6 · This list shows all films released in 2008, including films that went direct-to-video, or only got an international theatrical release. For each film, we use the first date on which it was made available to the public, which might include international theatrical or domestic video releases that were a few days, or sometimes more, earlier than the domestic (US/Canada) …

Product information "ECC81 Telefunken / RFT (NOS)" ECC81 Telefunken, original boxed. no <> diamond logo in the glas bottom / made in Eastern Germany by RFT. Telefunken used tubes from the RFT factory (DDR - Eastern Germany) when …

But the 6SN7GT is arguably the best general-purpose audio triode. Its large octal format is more rugged and less prone to intermittent pin connections than miniature type. Its mu of 20 is a nice compromise between the old low-mu types and low-current high mu types. The plate resistance is low enough to drive choke or transformer loads.