[TK16]

A0 makes it a `65.

 

[thecrow]

I believe mid 1965 was the change from gray to silver plates.  By 1975 as I recall they were using A frame getters.

If I am correct that would make these late 1965.

If I am not, others please chime in...

Thats what i thought until i just read the comment on brent jessee'site.

I have some silver shield cca with codes stamped on the getter aupport of A1/6B. Ive always thought they were '76. That was also following advice from brent.

 

[kolkoo]

Thats what i thought until i just read the comment on brent jessee'site.

I have some silver shield cca with codes stamped on the getter aupport of A1/6B. Ive always thought they were '76. That was also following advice from brent.

Brent, Kevin probably other tube dealers have been wrong before and will be wrong again on many topics regarding tubes. And it's a shame really they have a vast inventory of tubes and still fail to do their research that we can gather with a couple of google searches.
 
That A0 1# 5X is 1965 Siemens Halske factory as was said before. Your A1 is 1966 probably Munich factory. I may also be wrong so correct me if I am
 
P.S. Tubemonger gets it right 100% of the time from my experience:
http://www.tubemonger.com/Siemens_Halske_60s_MINT_NOS_E88CC_6922_Munich_p/1082a.htm
http://www.tubemonger.com/Siemens_Halske_MPs_60s_MINT_NOS_NIB_E88CC_6922_p/726.htm
 
And tubeworld has it right too
https://tubeworldexpress.com/products/copy-of-best-6922-siemens-pair-1-6922-siemens-halske-gray-shield-nos-1967-a2-series-1-2-matched-strong-ma-and-gm
 
( I mean year-factory identification)

 

[thecrow]

Brent, Kevin probably other tube dealers have been wrong before and will be wrong again on many topics regarding tubes. And it's a shame really they have a vast inventory of tubes and still fail to do their research that we can gather with a couple of google searches.

That A0 1# 5X is 1965 Siemens Halske factory as was said before. Your A1 is 1966 probably Munich factory. I may also be wrong so correct me if I am

P.S. Tubemonger gets it right 100% of the time from my experience:
http://www.tubemonger.com/Siemens_Halske_60s_MINT_NOS_E88CC_6922_Munich_p/1082a.htm
http://www.tubemonger.com/Siemens_Halske_MPs_60s_MINT_NOS_NIB_E88CC_6922_p/726.htm

And tubeworld has it right too
https://tubeworldexpress.com/products/copy-of-best-6922-siemens-pair-1-6922-siemens-halske-gray-shield-nos-1967-a2-series-1-2-matched-strong-ma-and-gm

( I mean year-factory identification)

Im loving this info. Thanks

So why do some of these siemens (cca and i guess some others) have 6 and have some have 4 digits on the getter support?

And did the code etching on the glass stop when these started in the early 60's?

Edit: isnt the siemens # in munich? So both these tubes would have been from there or were there more than one munich factory?

 

[TK16]

Siemens switched to metal plates in the later part of 65, 1 of my 65 E88CC has metal plate, the earlier 65's have acid etching. My A0 CCa 65 have metal plate. Think silver shields started 66 A1 revision.

 

[thecrow]

Siemens switched to metal plates in the later part of 65, 1 of my 65 E88CC has metal plate, the earlier 65's have acid etching. My A0 CCa 65 have metal plate. Think silver shields started 66 A1 revision.

. That's great. Thank to all that are contributing to my search. Its all coming together for me.

So would early (say 1962-65) gray cca tubes be quite a step up from my '66 a1 ailver shield that ive always enjoyed.

Am i missing out on much?

Until 20 minutes ago i was thinking the early 60's gray would be a lot better than my (what i thought was) 76 silver tubes that ive always enjoyed in their style

And any iseas tk16 on 4 digut cises v 6 on these tubes?

 

[kolkoo]

Edit: isnt the siemens # in munich? So both these tubes would have been from there or were there more than one munich factory?

You are right they are both made in Munich supposedly. I may have said some bullschiit there, I'm now digging to find more info on 6 v 4 letter codes as I've seen tubes with A0 1# 9X and tubes with A4 9K that are both supposed to be 1969... so I'll come back with more info
 
Edit: I read something about "east germany made" Siemens but not enough yet...
 
Edit2: Check this post out - not about codes but all Siemens types are in there with really good pictures http://www.audioasylum.com/cgi/t.mpl?f=tubes&m=240117 . Also I can't find the A0 1# <digit>X where digit is > 5 currently maybe my memory let me down

 

[thecrow]

You are right they are both made in Munich supposedly. I may have said some bullschiit there, I'm now digging to find more info on 6 v 4 letter codes as I've seen tubes with A0 1# 9X and tubes with A4 9K that are both supposed to be 1969... so I'll come back with more info

Edit: I read something about "east germany made" Siemens but not enough yet...

Could it be silvers have 4 codes and the gray 6? I've totally made that hypothesis up just now

 

[kolkoo]

Could it be silvers have 4 codes and the gray 6? I've totally made that hypothesis up just now

http://www.tubemonger.com/Siemens_Halske_60s_MINT_NOS_E88CC_6922_Munich_p/1082a.htm
 
4 letter code 1966 grey shields. A2 6K.
 
Maybe just past 1965 they switched to the 4 letter codes. Meaning only A0 had 6 letter, from A1 there's 4 lettered codes.
 
That's the best I can find out.
 
Also if you missed the edit in my previous post: http://www.audioasylum.com/cgi/t.mpl?f=tubes&m=240117 very lovely pictures of all 5 types to ever exist
 
I'll tell you what I could totally splurge some amount of money onto a D-Gettered Siemens. My serbian friend tube collector game me this description of them compared to Reflektor 1975 :

  Are you satisfied with 6N23P Reflektor 1975?
 
Comparing to them, Siemens D getter are a bit more detailed, with slight extensions at top and bottom.

Not a lot of words but still interesting to hear.

 

[thecrow]

http://www.tubemonger.com/Siemens_Halske_60s_MINT_NOS_E88CC_6922_Munich_p/1082a.htm

4 letter code 1966 grey shields. A2 6K.

Maybe just past 1965 they switched to the 4 letter codes. Meaning only A0 had 6 letter, from A1 there's 4 lettered codes.

That's the best I can find out.

Also if you missed the edit in my previous post: http://www.audioasylum.com/cgi/t.mpl?f=tubes&m=240117 very lovely pictures of all 5 types to ever exist

I'll tell you what I could totally splurge some amount of money onto a D-Gettered Siemens. My serbian friend tube collector game me this description of them compared to Reflektor 1975 :
Not a lot of words but still interesting to hear.

I saw that list of 5 types of siemens. The final word on number 5 on the list reminded me that i had read that before

I appreciate your search/help. I edited my earlier post that brent's comment of codes on the getter support not starting til later in 65 seems to hold true

I'm now thinking that my silver 66's might not need to be upgraded to a pair of 63 grays.......or do they? Let me know if anyone beleives there would be a valid reason. One top 5 listing of tubes has only the grays at number 1 and another has no difference between the two

Maybe i should hunt down some tele e188cc (which i was not going to worry about) before i think about gray cca's. Or should i wait for pinched 6922 (amperex or usa) to go with my recent 65 holland valvo's. I don't know.

 

[kolkoo]

I saw that list of 5 types of siemens. The final word on number 5 on the list reminded me that i had read that before

I appreciate your search/help. I edited my earlier post that brent's comment of codes on the getter support not starting til later in 65 seems to hold true

I'm now thinking that my silver 66's might not need to be upgraded to a pair of 63 grays.......or do they? Let me know if anyone beleives there would be a valid reason. One top 5 listing of tubes has only the grays at number 1 and another has no difference between the two

Maybe i should hunt down some tele e188cc (which i was not going to worry about) before i think about gray cca's. Or should i wait for pinched 6922 (amperex or usa) to go with my recent 65 holland valvo's. I don't know.

I have not heard silver shielded O getter Siemens. Only A-Frame silver shield from 1971.
 
I have a pair of E88CC Siemens - 1962 and 1965, 1962 has acid code, 1965 has metal stamped code. It pairs perfectly even thought it's 3 years apart. But it's the exact same construction.
I have a pair of unknown year E188CC gray  60s ( I assume pre-metal-stamped codes). Both pairs are great tubes, I do prefer the E88CC however.
 
Still I like the dutch sound better. If you have the means do try everything. Also CCa / E88CC are the same tube, I've proven it to my ears by matching a Valvo white print CCa from 1974 with a Valvo white print E88CC from 1971. But the pair is an absurdly close electrical match, and CCas were supposed to be really strong electrically:

		Ia1	Ia2	Gm1	Gm2	Mu1	Mu2	Ra1	Ra2	Ra % delta	Ia1.1	Ia2.1
PAIR 39	Valvo CCA White '74 #7	~11	~11	8,58	8,89	32,7	34,3	3,811189	3,858268	1,227698604	15,96	14,35
PAIR 39	Valvo E88CC White '71 #8	~11	~11	8,62	8,68	33,4	33,3	3,87471	3,836406	0,993486528	14,22	14,08

 
The Gm, Mu, Ra and Ia(.1) matching is so close. And the tubes are from the same era near same batches (7LG / 7LH) .
I have not tried it with Siemens but a lot of people have written the same as well.
I've also had CCas that test really bad however so it's all about how well your seller has matched them.
 
As for pinched waists:
 
I popped in my 1957 DJ2 delta7X PCC88 Pinched waist pair yesterday after listening to my 1958 Pinched waist 7L3 delta8X E88CC pair for a while and it had more pronounced detail and harder hitting bass. The E88CC however was perfectly gentle had the same detail but less audible, just hanging in the background, so I can't pick a clear winner.
 
So if your amp supports the PCC88 don't be afraid to go for them, but again make sure the seller has tested them and matched them at the voltages you will be running them (they are 7V per specification but I run mine at 6.3V in the Lyr2, so I test and match them at 6.3V). I've seen PCC88 that are way over 100% on 7V and are really low testing at 6.3V.
 
Bah this post went all over the place in the end I hope it makes some to someone
 
 
Edit: Pinched waist 7L0/1 E88CC - have gold grid - I've confirmed this after looking at pictures for example this http://usr.audioasylum.com/images/3/34833/Kinderbett_357.jpg you can see it under the bottom mica. It is also said that 7L2/3 Have silver grid.
 
Edit2: http://i.ebayimg.com/00/s/MTA2NlgxNjAw/z/jN4AAOSw9N1VgfVs/$_3.JPG 1955 PW Eindhoven E88CC 7L0 *drools* . Also apparently this is the first E88CC ever made anywhere.

 

[TK16]

. That's great. Thank to all that are contributing to my search. Its all coming together for me.

So would early (say 1962-65) gray cca tubes be quite a step up from my '66 a1 ailver shield that ive always enjoyed.

Am i missing out on much?

Until 20 minutes ago i was thinking the early 60's gray would be a lot better than my (what i thought was) 76 silver tubes that ive always enjoyed in their style

And any iseas tk16 on 4 digut cises v 6 on these tubes?

Do not have anything but grey shield Siemens. There's a big difference from CCa and E88CC of the same year. Only had 1 silver shield set, 67 a3, no meat on the bones. Can't comment on a1's, never had em.

 

[spyder1]

 
​Please avoid purchasing vacuum tubes from "Scary Clowns"!
I had to deal with a Ebay "Scary Clown" in which I won a vacuum tube auction, but the seller refused to send me the vacuum tubes. I raised a dispute with Ebay, and got a refund.

 

[Bleether]

Oh jeeze, what seller was that? I don't need any clown fiestas in my tube hunt.

 

[spyder1]

 
Oh jeeze, what seller was that? I don't need any clown fiestas in my tube hunt.

​They go by riatla3.