Category Miniwatt ECC83

Tube identification

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Code structure: type | type | batch/construction –  factory | year |month | week

Example: I66 Δ0K4
   I6 = ECC83,    I66 = ECC83 of construction #6
   Δ = Made in Heerlen/Holland
   0K4 = Made 197 0 in, November K,   4th week

The most important factories are:

Δ    Heerlen, Holland –> My favorite!

D    Hamburg, West Germany

B    Blackburn, England (GB)

L    Brussels, Belgium

1 2 3 6 9 Eindhoven, Holland

≠    Munich, Germany Siemens & Halske

X Y Sittard, Holland

Philips code list: PDF Download

Long or short plate ECC83?

I6= Short plate –> 15mm

mC = Long plate –> 17mm

Some says about long or short plate(forum):

” I’d generalize that long-plate 12AX7 (ECC83) are more articulate than short-plate: there’s more air and dynamic potential (less compression) to the sound through long-plates, in my experience. I’ve found bass to be generally more distinct or percussive with long-plates, even though there may not be more bass (depends on the tube). Some long-plate 12AX7 break up earlier than other 12AX7, both long- and short-plates; I don’t know if this is what you mean by “gain,” but it isn’t really the same thing. Oh yeah, the other generalization is that long-plates are more prone to microphonics.”

http://www.tube-classics.de/TC/Tubes/Valvo%20ECC83/ECC83.htm

I just at the begin to find out on my own if I hear these differences…

ecc83-philips1954Download
ecc83-1970Download

My tubes

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Aim is not selling! Just to list what I have and indicational prices to them.

In my amp currently (March/2020) have original tubes + ECC82 (NOS) bought from ebay.

Power amp: EL 86: 1pcs MIB Δ 1A1 (Harlen,NL, 1961 ), rest MI4 D1A (Blackburn, 1961)

Preamp ECC83 right : Δ 0K3 (Harlen, 1960 Aug, wk3) left: Δ 1C4 (Harlen 1961, March, WK4)

RIAA ECC82: left and right: Δ 2K2 , Harlen 1962, aug WK2 (NOS from ebay gibrilla-it 100+20GBP Post)

RIAA ECC83: left and right: Δ 0K3 (Harlen, 1960 Aug, wk3)

Rectifier: GZ34 KLAA Valvo F32 X9G from Alen Tumbas 90EUR

My replacement stock:

EL86:

4pcs NOS matched: C.A.E., Gr Britain, Mil,  3pcs B3D3 measued 120% 116% 100%,   B3C3 measured: 101% (Philips Blackburn, 1963 April WK3, and March 3, week,) From: Dragan Nikolic 100EUR

4pcs NOS matched Mullard, Made in Great Britain, Mil, code: B8F4, (Philips Blackburn, 1968, June week4) From Alen Tumbas 15EUR/pcs

4pcs NOS matched: 1st pair: Philips code MIG L9E1 measured: 101% (G variant Bruxelles, 1969 May week1), Philips Miniwatt MIF L5B1 111% (F variant Bruxelles, 1965 Feb week1) 2nd pair: Philips MI1 B3K3 – measured 109% (variant 1, Blackburn, 1963, Aug wk3) Philips MI1 B4J3 measured 102% (variant 1, Blackburn, 1964, Oct wk3) from: Ebay, VDMradios 2*25USD + 16USD post

4pcs NOS matched Philips El86  made in hollandia, 1pcs MIF L6A2(F variant Bruxelles, 1966 Jan week2), 3pcs MIG L0F3,(G variant Bruxelles, 1960 June week3) From: Dragan Nikolic 75EUR

2pcs NOS Philips Miniwatt MIF L4C2 measured 100%,95% (F variant Bruxelles, 1964 March week2) From Ebay Italcida 37.2EUR (the 2pcs) +20EUR post

1pcs NOS Philips Miniwatt MIG Z(or 2)B1 measured: 114%, nice green picture (G variant Philips Monza less likely Philips Eindhoven) from ebay fantasticgoods15 8.5EUR+7.5EUR post

1pcs NOS Philips Miniwatt MID L3A2 (D variant Bruxelles, 1963 Jan week2) from ebay fantasticgoods15 9.5EUR+7.5EUR post

5pcs  used: Philips Miniwatt made in holland, 2pcs MIB Δ1G4 measured 87%, filament error (B variant Herlen 1961,March WK4) 1pcs L(?)3B2 measured 85% (Bruxelles, 1963 Feb week2) seems new!, 2pcs MIB Δ1F1 measured filament error, 129% (B variant Herlen 1961,March WK4) from: marktplaats birdman007_8 at hotmail.com 30USD +12USd post

2pcs EL86 Philips Miniwatt (MI4 X7B 68mA 33/100 – measured 87%)(M11 D61 – measured: SHORT K-G) new MarionenBert via Marktplaats (175EUR with shipping for 8 tubes/1)

2pcs EL86 Philips Miniwatt used (MI8 Δ8K – measured 43%, ??? Δ9C -measured 83% MarionenBert via Marktplaats(175EUR with shipping for 8 tubes/2)

1pcs EL86 Miniwatt MIB Δ1H2 – measure 81% 40EUR with Post (25+15) from Mauro Masetto ebay

ECC83

1pcs Philips MINIWATT MADE IN HOLLANDIA, Δ2G2 96/108%(Herlen 1962, July week2) from: ebay Marconitube 26.5EUR + Post

1pcs Philips MINIWATT “IMPORT” measured: 98/124% from: audiovalves 70EUR,

4pcs matched MINIWATT ECC83 MADE IN HOLLANDIA, Δ4L3 measured:71/76%, Δ3B4 measured: 80/84%, I65 Δ2B1 measured:82/88%, Δ3B4 measured:87/68% From: Dragan

4pcs matched PHILIPS MINIWATT ECC83 MADE IN HOLLAND 1pcs Δ9J measured: 105/109% measured: (Herlen 1958 Oct), 1pcs ΔP MCN measured: 86/65% (long plate!), 1pcs ΔO□ 96/96%(Herlen 1960),1pcs IO3? Δ1E4 88/95% all from: tubesandrecords.com 400EUR

2pcs ECC83 Philips Miniwatt from: ragazzi.m70 85EUR + Post (36/3 –>~12EUR)

2pcs ECC83 (MC6 Δ8F Measured 63-68%, MC6 Ŧ8G Measured 48-48%) longplates Heerlen/München new MarionenBert via Marktplaats (175EUR with shipping for 8 tubes/3)

ECC82

2pcs ECC82 GBC 12AU7A Copenhagen K6 Tube NEW/NIB 50th Ultra Rare 220EUR 107/113%

2pcs ECC82 Philips Miniwatt measured: 90/76%, 92/78% too high Ig! from: ragazzi.m70 74EUR + Post (36/3 –>~12EUR)

2pcs ECC82 new (2x GI3 ΔOD Measured 29/61% , 86/87%) MarionenBert via Marktplaats (175EUR with shipping for 8 tubes/4)

EL84:

2pcs 6P14P -EV, Russian EL84 (48 mA for 6p14p-ev = 100%) measured: 93%,109% from: tubesandrecords.com 42EUR the pair

EF86

2pcs matched NOS Philips 8Y6 I911 from Alen Tumbas 20EUR/pcs

2pcs used Philips Miniwatt 8Y5 F1E5 (from an used AG9015 – Santi)

GZ34

1pcs used Philips Miniwatt from: ragazzi.m70 85EUR + Post (36/3 –> ~12EUR)