[mordy]

Found the NATO country code list. The UK is indeed 99, and the US gets 00-10. In case you find a tube with the country code 60, it was made in Kuwait (country code 69 is off the map):

Country	NCB Code(s)	Country	NCB Code	Country	NCB Code
United States	00 and 01	Hungary	51	New Zealand	98
United States (unassigned)	02 through 10	Chile	52	United Kingdom	99
NATO-standard items	11	Croatia	53
West Germany / Germany	12	Republic of North Macedonia[4]	54
Belgium	13	Latvia	55
France	14	Oman	56
Italy	15	Russian Federation	57
Czechoslovakia / Czech Republic	16	Finland	58
Netherlands	17	Albania	59
South Africa	18	Kuwait	60
Brazil	19	Ukraine	61
Canada	20 and 21	Belarus	62
Denmark	22	Morocco	63
Greece	23	Sweden	64
Iceland	24	Papua, New Guinea	65
Norway	25	Australia	66
Portugal	26	Afghanistan	67
Turkey	27	Georgia	68
Luxembourg	28	?	69
Argentina	29	Saudi Arabia	70
Japan	30	United Arab Emirates	71
Israel	31	India	72
Singapore	32	Serbia	73
Spain	33	Pakistan	74
Malaysia	34	Bosnia-Herzegovina	75
Thailand	35	Brunei Darussalam	76
Egypt	36	Montenegro	77
Republic of Korea	37	Jordan	78
Estonia	38	Peru	79
Romania	39	Colombia	80
Slovakia	40
Austria	41
Slovenia	42
Poland	43
United Nations-standard items	44
Indonesia	45
Philippines	46
Lithuania	47
Fiji	48
Tonga	49
Bulgaria

Don't know why Deyan was left out, his country code should be 50 lol
Hi leftside:
And now we have solved where the Telefunken CV133 were made - not in Ulm, DE, but in country 99, which is the United Kingdom.

 

[gibosi]

Found the NATO country code list. The UK is indeed 99, and the US gets 00-10. In case you find a tube with the country code 60, it was made in Kuwait (country code 69 is off the map):

Country	NCB Code(s)	Country	NCB Code	Country	NCB Code
United States	00 and 01	Hungary	51	New Zealand	98
United States (unassigned)	02 through 10	Chile	52	United Kingdom	99
NATO-standard items	11	Croatia	53
West Germany / Germany	12	Republic of North Macedonia[4]	54
Belgium	13	Latvia	55
France	14	Oman	56
Italy	15	Russian Federation	57
Czechoslovakia / Czech Republic	16	Finland	58
Netherlands	17	Albania	59
South Africa	18	Kuwait	60
Brazil	19	Ukraine	61
Canada	20 and 21	Belarus	62
Denmark	22	Morocco	63
Greece	23	Sweden	64
Iceland	24	Papua, New Guinea	65
Norway	25	Australia	66
Portugal	26	Afghanistan	67
Turkey	27	Georgia	68
Luxembourg	28	?	69
Argentina	29	Saudi Arabia	70
Japan	30	United Arab Emirates	71
Israel	31	India	72
Singapore	32	Serbia	73
Spain	33	Pakistan	74
Malaysia	34	Bosnia-Herzegovina	75
Thailand	35	Brunei Darussalam	76
Egypt	36	Montenegro	77
Republic of Korea	37	Jordan	78
Estonia	38	Peru	79
Romania	39	Colombia	80
Slovakia	40
Austria	41
Slovenia	42
Poland	43
United Nations-standard items	44
Indonesia	45
Philippines	46
Lithuania	47
Fiji	48
Tonga	49
Bulgaria

Don't know why Deyan was left out, his country code should be 50 lol
Hi leftside:
And now we have solved where the Telefunken CV133 were made - not in Ulm, DE, but in country 99, which is the United Kingdom.

Good work!!

 

[gibosi]

I am pretty sure these are GEC U52 with a 5Z3 base. But I'm not positive.

https://www.ebay.com/itm/5z3-Tubes-Pair-Maid-in-England/184158929237

 

[leftside]

This roll has not been touched since I put it in - GEC U52 rectifier, Mullard ECC32, Sylvania 6BL7GT flat plates. Really good with the ZMF Verite!

I bet that combo sounds good with any headphone. Well done on finding 6 matching flat ladder plate/triple mica 6BL7GT.

Found the NATO country code list. The UK is indeed 99, and the US gets 00-10. In case you find a tube with the country code 60, it was made in Kuwait (country code 69 is off the map):

Country	NCB Code(s)	Country	NCB Code	Country	NCB Code
United States	00 and 01	Hungary	51	New Zealand	98
United States (unassigned)	02 through 10	Chile	52	United Kingdom	99
NATO-standard items	11	Croatia	53
West Germany / Germany	12	Republic of North Macedonia[4]	54
Belgium	13	Latvia	55
France	14	Oman	56
Italy	15	Russian Federation	57
Czechoslovakia / Czech Republic	16	Finland	58
Netherlands	17	Albania	59
South Africa	18	Kuwait	60
Brazil	19	Ukraine	61
Canada	20 and 21	Belarus	62
Denmark	22	Morocco	63
Greece	23	Sweden	64
Iceland	24	Papua, New Guinea	65
Norway	25	Australia	66
Portugal	26	Afghanistan	67
Turkey	27	Georgia	68
Luxembourg	28	?	69
Argentina	29	Saudi Arabia	70
Japan	30	United Arab Emirates	71
Israel	31	India	72
Singapore	32	Serbia	73
Spain	33	Pakistan	74
Malaysia	34	Bosnia-Herzegovina	75
Thailand	35	Brunei Darussalam	76
Egypt	36	Montenegro	77
Republic of Korea	37	Jordan	78
Estonia	38	Peru	79
Romania	39	Colombia	80
Slovakia	40
Austria	41
Slovenia	42
Poland	43
United Nations-standard items	44
Indonesia	45
Philippines	46
Lithuania	47
Fiji	48
Tonga	49
Bulgaria

Don't know why Deyan was left out, his country code should be 50 lol
Hi leftside:
And now we have solved where the Telefunken CV133 were made - not in Ulm, DE, but in country 99, which is the United Kingdom.

Good job! Post bookmarked. I wonder who made them then?

 

[cddc]

Nice list....but why Russia is on the list, shouldn't it be on the Warsaw Pact list instead of NATO list?

Maybe reserved for possible future enrollment...

 

[DecentLevi]

The newest(?) hi-fi tweak: filling your component with sand. More here:
https://www.head-fi.org/threads/singxer-su-6.902272/post-15450685

Disclaimer: I do not endorse this idea in any way, nor am I sure to try it.

 

[2359glenn]

The newest(?) hi-fi tweak: filling your component with sand. More here:
https://www.head-fi.org/threads/singxer-su-6.902272/post-15450685

Disclaimer: I do not endorse this idea in any way, nor am I sure to try it.

What!!!
The dumbest thing I ever head of.

 

[Monsterzero]

The newest(?) hi-fi tweak: filling your component with sand. More here:
https://www.head-fi.org/threads/singxer-su-6.902272/post-15450685

Disclaimer: I do not endorse this idea in any way, nor am I sure to try it.

Its a twist on the quartz crystals that some use to change the sound of their gear.
I know of at least one (very)high end cable maker who fills his power conditioners and cables with a mix of crystal sand.

Simply placing a chunk of pink quartz on your transformer makes a noticeable change. Cheap,harmless and reversible.

 

[L0rdGwyn]

Just want to point out that the thread is nearing page 2359, better make it good

 

[L0rdGwyn]

Its a twist on the quartz crystals that some use to change the sound of their gear.
I know of at least one (very)high end cable maker who fills his power conditioners and cables with a mix of crystal sand.

Simply placing a chunk of pink quartz on your transformer makes a noticeable change. Cheap,harmless and reversible.

Don't knock it 'til you try it I guess, need to keep my mouth shut and let people just do their thing. Just hope users will experiment with putting pink quartz on top of their gear before they are convinced to dump sand into it...

 

[Monsterzero]

Don't knock it 'til you try it I guess, need to keep my mouth shut and let people just do their thing. Just hope users will experiment with putting pink quartz on top of their gear before they are convinced to dump sand into it...

Ive put pink quartz on top of several of my pieces of gear. It really brings out the upper mids,but diminishes bass and weight. I know some users who swear by a mixture of various rocks that work in combination with each other.
I have had discussions about this with some other members in this thread,where I admitted to thinking this was totally ridiculous and asinine,until I tried it. I have all of the other rocks here in my home,but havent gotten around to experimenting yet.

 

[maxpudding]

Just when you thought cables would be the end of it, now we will need to look at sand impressions

 

[gibosi]

If you have some surplus tubes you think you will never use, this might be a good home for them.

And even if you don't, this site gives some idea about the electronics installed on WWII submarines.

https://www.wisconsinmaritime.org/submarines/uss-cobia/radio-restoration/

 

[mordy]

Ive put pink quartz on top of several of my pieces of gear. It really brings out the upper mids,but diminishes bass and weight. I know some users who swear by a mixture of various rocks that work in combination with each other.
I have had discussions about this with some other members in this thread,where I admitted to thinking this was totally ridiculous and asinine,until I tried it. I have all of the other rocks here in my home,but havent gotten around to experimenting yet.

Way back, maybe 30 years ago, there was this thing about putting coins on the front edge on top of the speakers. A couple dimes and or quarters - should be cheaper than pink quartz.
And I think sand has a good use in serving as filler in hollow equipment stands for additional mass, but I never tried it. In those days Toys 'R Us had inexpensive 25 lb sand bags.
And the green markers for the CD edges .... memories.....

 

[leftside]

Found the NATO country code list. The UK is indeed 99, and the US gets 00-10. In case you find a tube with the country code 60, it was made in Kuwait (country code 69 is off the map):

Country	NCB Code(s)	Country	NCB Code	Country	NCB Code
United States	00 and 01	Hungary	51	New Zealand	98
United States (unassigned)	02 through 10	Chile	52	United Kingdom	99
NATO-standard items	11	Croatia	53
West Germany / Germany	12	Republic of North Macedonia[4]	54
Belgium	13	Latvia	55
France	14	Oman	56
Italy	15	Russian Federation	57
Czechoslovakia / Czech Republic	16	Finland	58
Netherlands	17	Albania	59
South Africa	18	Kuwait	60
Brazil	19	Ukraine	61
Canada	20 and 21	Belarus	62
Denmark	22	Morocco	63
Greece	23	Sweden	64
Iceland	24	Papua, New Guinea	65
Norway	25	Australia	66
Portugal	26	Afghanistan	67
Turkey	27	Georgia	68
Luxembourg	28	?	69
Argentina	29	Saudi Arabia	70
Japan	30	United Arab Emirates	71
Israel	31	India	72
Singapore	32	Serbia	73
Spain	33	Pakistan	74
Malaysia	34	Bosnia-Herzegovina	75
Thailand	35	Brunei Darussalam	76
Egypt	36	Montenegro	77
Republic of Korea	37	Jordan	78
Estonia	38	Peru	79
Romania	39	Colombia	80
Slovakia	40
Austria	41
Slovenia	42
Poland	43
United Nations-standard items	44
Indonesia	45
Philippines	46
Lithuania	47
Fiji	48
Tonga	49
Bulgaria

Don't know why Deyan was left out, his country code should be 50 lol
Hi leftside:
And now we have solved where the Telefunken CV133 were made - not in Ulm, DE, but in country 99, which is the United Kingdom.

The plot thickens.... I zoomed in on the glass and saw the "BWB 448" designation inside the German Eagle Crest on the tubes...

"BWB" MILITARY EAGLE
THE BWB SOURCED THESE OLDER 1950'S TUBES in the early 1970's from Telefunken factory stock WITH THE DOME-TOP AND
RE-LABELLED THEM "BWB" and REPACKED THEM AFTER EXTENSIVE MILITARY TESTING.
Telefunken didn't make EF86 tubes in the 1970's as the Telefunken Factories had long ago shut their doors
These are BWB CERTIFIED for TOP specifications, not only meeting but EXCEEDING Telefunken's Data Sheet requirements.
THEY THEN labeled THE "BWB 448" GERMAN MILITARY DESIGNATION "EAGLE CREST" AND REPACKAGED THE BOXES IN 1970's.
Best Quality "BWB" Bundesamt für Wehrtechnik und Beschaffung Tungsram tubes.
(German: Federal Office of Defense Technology and Procurement)


https://www.tubemuseum.org/ProductDetails.asp?ProductCode=TFK-EF86