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[FS] Selling my stock of ECC83/12AX7 valves - around 30 for sale.

les24preludes

les24preludes

pfm Member
I've made a list of the ECC83/12AX7 valves I have for sale. The boxes show some test data at gm=1.6 as per AVO manual, but it looks a bit like the tubes were tested in circuit and the anode voltages marked down for each half. Going by the markings on the boxes the "new" voltage looks like it was 60V. There's one where "new" looks like 100 but that must have been a different circuit. These were tested over 10 years ago and I can't remember how they were tested. Here's what I have. I haven't worked out prices yet - that will take me a while. I also don't know what the unmarked valves are - could even be Mullards with markings rubbed off.
Anyway, PM me if interested and we can take it further. Andy

CV4004 KB/D 50/48 very good
GPO KB/DA CV492 original box NIB
Amperex 12AX7A "good" red print, clean
Amperex 12AX7A red box red print, clean
Mullard GB ECC83 38/30 @ 1.6gm marked good
Mullard GB ECC83 43/57 @ 1.6gm marked very good
Mullard CV4004 44/38 @ 1.6gm marked very good
Mullard GB ECC83 ?
Mullard 20/22
Mullard GB ECC83 44/50 @ 1.6gm. marked very good
Mullard GB ECC83 44/56 @ 1.6gm. marked very good
GEC 56/44
GEC marked "OK"
GEC 50/25
GEC 43/48
GEC 60/58 very good
Brimar ?
Brimar 38/44 very good
Brimar 32/48
Japan ECC83 62/44
Bugera 12AX7C Premium Selected
? 12AX7S 104/96 excellent
Dynaco 62/56 very good
White Star logo ECC83 marked P6WN?
Marked "ECC83"
?mullard 54/50 very good
? ECC83 74/60. print erased
? ECC83 68/54 @ 1.6gm. "strong"
? green print erased
? print erased
 
Latest list.... Note that the Dynaco is Telefunken and tests very good

Amperex 12AX7A "good" red print, clean SOLD
Amperex 12AX7A red box red print, clean SOLD
Mullard GB ECC83 44/50 @ 1.6gm. marked very good. SOLD
Mullard GB ECC83 44/56 @ 1.6gm. marked very good SOLD
Mullard GB ECC83 43/57 @ 1.6gm marked very good SOLD
Dynaco/Telefunken 62/56 very good. Made in West Germany £40 SOLD


CV4004 KB/D 50/48 very good £20
GPO KB/DA CV492 new in original box NIB £25
? 12AX7S 104/96 excellent £18
Mullard GB ECC83 ? £15
Mullard CV4004 44/38 @ 1.6gm marked very good £15
Mullard GB ECC83 38/30 @ 1.6gm marked good £12
Mullard 20/22 £10

Brimar ? £8.50
Brimar 38/44 good £8.50
Brimar 32/48 good £8.50

GEC 60/58 very good
GEC 56/44
GEC 50/25
GEC 43/48
GEC marked "OK"

Japan ECC83 62/44
Bugera 12AX7C Premium Selected
White Star logo ECC83 marked P6WN?
Marked "ECC83"
?mullard 54/50 very good
? ECC83 74/60. print erased
? ECC83 68/54 @ 1.6gm. "strong"
? green print erased
? print erased
 
Last edited:
All valves sold by Philips were silver ink marked at the bottom of the glass - the combination of letters and numbers about 3-4mm high. They even marked sourced valves - I have some ECC83 that are branded CVC but were bought from Philips as the marking is there, but says that they were made by Ei. The Philips codes include symbols for Siemens, Thorn, Tungsram, Japan, all their own individual sites etc. etc. etc. There are something like 60 different source codes.

The silver ink codes can be removed, but it is not simple, they are fused into the glass.
 
Dynaco/Telefunken ECC83 now sold.

Others available. I haven't priced the bottom ones - still trying to identify them.....

GEC ECC83s go for silly money as far as I can see, so I'll have to price those carefully.
 
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