(2) 12RLL3 NEC High Testing Grade Tube Akin To 12AX7 12AU7 12AT7 ECC83 5965 7062

Description

We Suggest One Pair of Early Uniquely made duo-teriode electube.
NEC
was a world electron giant at
that
time.
Quality are not commonly seen among All same sized duo-triodes.
There is a wider solid center plate in between their two plates. Duo Thick supporting Rods ensure higher quality and less noise.
Especially made for Professional Testing / Tester / Communications equipment.
The last two image are for references ONLY.
It show how it is employed together with type EL34 and 845 tubes for an Audio SE Singled-Ended Amplifier !
All stock images.
Also considered as a close counterpart for 5965 TELEFUNKEN !
CLOSE ( OR EQUAL to ? ) 12AV7, ECC82 ? HIGH GRADE 12AT7?
You can also Google it for more interesting Info ... as these:
１２ＡＵ７とピン互換のＭＴ双３極管
MT Pin-Compatible with 12AU7
Type
Heater
(VxA)
Ebmax
(V)
Ppmax
(W)
mu
gm
(mmho)
rp
(kohm)
Ep(V)
Ip(mA)
Con.
Price
12BH7A
6.3x0.6/
12.6x0.3
300
3.5
16.5
3.1
5.3
250
11.5
A
1,500*c
12AU7/
ECC82
6.3x0.3/
12.6x0.15
300
2.75
17
2.2
7.7
250
10.5
A
800*c
ECC99
6.3x0.8/
12.6x0.4
400
5.0
22
9.5
2.3
150
18
A
2,000*c
E80CC/
6085
6.3x0.6/
12.6x0.3
300
2
27
2.7
10
250
6
A
22,000*f
(Pair)
12RLL3
6.3x0.45/
12.6x0.225
275
2.8
30
5.5
5.5
150
15
A
-
12AY7
6.3x0.3/
12.6x0.15
300
1.5
40
1.75
22.9
250
3
A
2,000*f
6414
6.3x0.45/
12.6x0.225
200
2.0
42.5
5.55
7.65
180
8
A
1,800*f
5965/
E180CC
6.3x0.45/
12.6x0.225
330
2.4
47
6.7
6.3
150
8.5
A
1,000*c
12AT7/
ECC81
6.3x0.3/
12.6x0.15
300
2.5
60
5.5
10.9
250
10
A
800*c
12AZ7
6.3x0.45/
12.6x0.225
300
2.5
60
5.5
10.9
250
10
A
2,000*f
5751
6.3x0.35/
12.6x0.175
330
0.7
70
1.2
58
250
1.0
A
1,800*c
12RHH14
6.3x0.36/
12.6x0.18
330
1.1
70
1.0
-
250
1.0
A
-
12AX7/
ECC83
6.3x0.3/
12.6x0.15
300
1.0
100
1.6
62.5
250
1.2
A
1,000*c
接続Ａ
Connection A
https://www.asahi-net.or.jp/~up2j-knst/tube/tb-dtriode.htm
https://www.railce.com/cw/casc/tubelist/rxtube/12rhh14.jpg
https://yuzurin.dip.jp/mjcontent/kairozu.php?kairozuid=0309124&yearid=2003
The pursuit of low noise at low impedance type transformer coupling
12R-LL3 non-feedback LCR type phono equalizer amplifier [ Part ]
https://www.geocities.jp/cz504d/page011.html
https://www.tezukuri-amp.org/shibu/kantou/bbs/img-box/img20120729220613.jpg
Some information from Japan:
真空管、
NEC 12RLL3(12AT7
の互換球
)
をクラシックコンポーネンツで購入。ギターアンプのリバーブに使うのでマイクロフォニックに強いのを求めたら、この球がおすすめとの事。オーディオアンプで聴いてみると、鮮やかな音色
♪
(  ... Vacuum tube , buy NEC 12RLL3 the ( compatible ball 12AT7) Classic Components . If you determined that the strong to microphonic we will use the reverb of the guitar amplifier , this sphere is that of a recommendation . When I listen to an audio amplifier , vivid tone
♪
)
An Image in Gallery Pictures is from another seller selling text that indicates that types 5965 E180cc 7062 are all close family members of this 12RLL3.
電圧増幅双３極ＭＴ管
12AT7
の高信頼管
2C51 / 5670 is similar.
degree of vacuum is high, the cathode.. 
But perhaps because of pure nickel material
Audiophiles seem to use it in favor for the pre-amplifier .
Numerically It is close to the breed of 2C51 5670 ?
その他のＭＴ双３極管
Other MT
Type
Heater
(VxA)
Ebmax
(V)
Ppmax
(W)
mu
gm
(mmho)
rp
(kohm)
Ep(V)
Ip(mA)
Con.
Price
5687
6.3x0.9/
12.6x0.45
300
4.2
17
8.5
2
180
23
-
1,000*c
6350
6.3/12.6
330
4
18
4.6
3.9
150
11
-
1,800*f
6FQ7/
6CG7
6.3x0.6
330
3.5
20
2.6
7.7
250
9
B*
1,400*c
6463
6.3x0.6/
12.6x0.3
330
4.4
20
5.2
3.9
250
14.5
-
2,500*f
E182CC/
7119
6.3x0.64/
12.6x0.32
300
4.5
24
15
1.6
120
36
-
2,500*c
ECC84/
6CW7
6.3x0.33
180
2.0
24
6.0
-
90
12
-
1,800*f
E288CC/
8223
6.3x0.475
250
3
25
20
1.25
100
30
-
-
6DJ8/
ECC88
6.3x0.365
130
1.8
33
12.5
2.64
90
15
B
1,400*c
6922/
7308
6.3x0.3
220
1.5
33
12.2
2.7
100
15
B
800*f
5670/
WE396A
6.3x0.35
330
1.65
35
5.5
-
150
8.2
-
650*c
6240G
6.3
800
3
35
3.5
10
250
7
B
-
6AQ8/
ECC85
6.3x0.435
300
2.5
57
5.9
9.66
250
10
B
1,800*f
5755/
WE420A
6.3/12.6
200
1.0
70
1.55
-
180
2.1
-
2,000*f
ＧＴ双３極管
GT
Type
Heater
(VxA)
Ebmax
(V)
Ppmax
(W)
mu
gm
(mmho)
rp
(kohm)
Ep(V)
Ip(mA)
Style &
Connection
Price
6SN7GT
6.3x0.6
300
2.5
20
2.6
7.7
250
9
GT-US
1,400*c
ECC32
6.3x0.95
-
-
32
2.3
14
250
-
-
9,500*f
6SL7GT
6.3x0.6
300
1.0
70
1.6
44
250
2.3
GT-US
2,500*c
サブＭＴ双３極管
Dual-Triode Sub-MT
Type
Heater
(VxA)
Ebmax
(V)
Ppmax
(W)
mu
gm
(mmho)
rp
(kohm)
Ep(V)
Ip(mA)
Style &
Connection
Price
6111
6.3x0.3
165
1.0
20
5.0
4.0
100
8.5
Sub-MT
1,800*c
6021W
6.3x0.3
165
0.8
35
5.4
6.5
100
6.5
Sub-MT
-
6112
6.3x0.3
165
0.3
70
1.8
39
100
0.80
Sub-MT
-
解説
•
電圧増幅用双３極管の比較表です。
μ
の小さい順に並べてあります。
•
表の見方は以下のようになります。
◦
型番
◦ μ,gm,rp
・・・動作条件は下欄を参照。
◦ Pp
・・・最大プレート損失
◦
条件・・・３定数の動作条件です。
◦
ピン接続・・・ピン接続を別図で示します。
•
電圧増幅管としては、
12AU7
が最もポピュラーで使いやすいでしょう。利得をかせぎたい場合は、
6DJ8
もよく使われます。
Hi-μ
管はどうしても高域特性が悪くなるので、現代的ではありません。
12BH7A
は歪みが多すぎます。
•
ドライバー管としては、
5687
が強力で、かつ価格の点でも有利です。
6DJ8
はあまり丈夫ではないので、ドライバー管には向きません。
Used as Second Driving Stage tube for 845 Audio Power amplifier ( Reference Only )