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Let's see your tubes!

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FullRangeMan

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Re: Let's see your tubes!
« Reply #1220 on: 16 Oct 2014, 01:27 pm »
Quote from: shoot on 10 Sep 2014, 03:52 pm
Hi adrianc ,do you ever see this kind siemens 5814A(12au7)? :green:



I also have questions to Adrianc, if I know him he will no post while restrict. :- ((
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loving_it

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Re: Let's see your tubes!
« Reply #1221 on: 16 Oct 2014, 08:01 pm »
7318's 

« Last Edit: 17 Oct 2014, 03:17 am by loving_it »
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1222 on: 23 Oct 2014, 10:04 pm »
6N2P-EB OTK 1 <18> date Sep1974, two pins bent and a white dot.
Question: What means the white dot??
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1223 on: 23 Oct 2014, 10:08 pm »
6N2P-EB 2 OTK 1 <7> date Sep1971 bent pins and orange dot.
What means the orange dot??
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1224 on: 28 Oct 2014, 02:52 am »
A low getter 6c33C-B 1983 <OTK 11> <17>, it loose vaccum the top pin broke glass. The metal pin rod are bent in a hi gravity load.
It show what Russian plane are capable.

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FullRangeMan

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Re: Let's see your tubes!
« Reply #1225 on: 28 Oct 2014, 02:56 am »
The front pin broke the glass.
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paul79

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Re: Let's see your tubes!
« Reply #1226 on: 28 Oct 2014, 04:15 am »
Quote from: loving_it on 16 Oct 2014, 08:01 pm
7318's 


NICE!! Best 12AU7 period.
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1227 on: 10 Nov 2014, 11:48 pm »
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Bob in St. Louis

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Re: Let's see your tubes!
« Reply #1228 on: 11 Nov 2014, 01:13 am »
A moment of silence.....  :(
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Guy 13

Re: Let's see your tubes!
« Reply #1229 on: 11 Nov 2014, 02:01 am »
Hi all.
The background paper is a Russian prayer for the dead tube.

Guy 13
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1230 on: 22 Nov 2014, 12:15 pm »
250TH made in Brazil by Ivape(subsidiary from BBC-Brown Bovery Company).
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Guy 13

Re: Let's see your tubes!
« Reply #1231 on: 22 Nov 2014, 01:22 pm »
Quote from: FullRangeMan on 22 Nov 2014, 12:15 pm
250TH made in Brazil by Ivape(subsidiary from BBC-Brown Bovery Company).

Hi FullRangeMan.
Is it a triode?
In what make/type of equipment is it used?
How much does it cost?
Do you own that tube?
Any other information you want to share with us about this interesting
and special tube?

Guy 13
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1232 on: 22 Nov 2014, 11:56 pm »
Its a hi gain triode from Eimac for transmiting app(amplifing, oscilation, modulation).
http://www.youtube.com/watch?v=ceByMJV5AwQ
This version is very cheap on Ebay, just $20 bid from a São Paulo vendor:
http://www.ebay.com/itm/250TH-NOS-tube-/151480618688?pt=Vintage_Electronics_R2&hash=item2344f2cec0
I unknow the original price, but I suspect its was expensive, I dont own this tube.
A audio amp to this tube would be expensive due a HV power supply and transformers.
Jap builders do amps with the 100TH with 1200Vdc and 100mA.
 http://www.youtube.com/watch?v=7AkeaAXR5Yo
« Last Edit: 23 Nov 2014, 01:08 am by FullRangeMan »
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Guy 13

Re: Let's see your tubes!
« Reply #1233 on: 23 Nov 2014, 04:15 am »
Quote from: FullRangeMan on 22 Nov 2014, 11:56 pm
Its a hi gain triode from Eimac for transmiting app(amplifing, oscilation, modulation).
http://www.youtube.com/watch?v=ceByMJV5AwQ
This version is very cheap on Ebay, just $20 bid from a São Paulo vendor:
http://www.ebay.com/itm/250TH-NOS-tube-/151480618688?pt=Vintage_Electronics_R2&hash=item2344f2cec0
I unknow the original price, but I suspect its was expensive, I dont own this tube.
A audio amp to this tube would be expensive due a HV power supply and transformers.
Jap builders do amps with the 100TH with 1200Vdc and 100mA.
 http://www.youtube.com/watch?v=7AkeaAXR5Yo

Hi FullRangeMan,
thanks for the information.
Very interesting.

Guy 13

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FullRangeMan

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Re: Let's see your tubes!
« Reply #1234 on: 26 Nov 2014, 01:27 pm »
6H9C(6SL7) 1986 sealed boxes:
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1235 on: 26 Nov 2014, 01:28 pm »
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1236 on: 26 Nov 2014, 01:30 pm »
Left 1971, Right 1986, no differences at naked eye:
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1237 on: 26 Nov 2014, 01:32 pm »
Back, 1986 are military.
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FullRangeMan

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Re: Let's see your tubes!
« Reply #1238 on: 26 Nov 2014, 01:33 pm »
Octal sockets.
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Jehuty

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Re: Let's see your tubes!
« Reply #1239 on: 29 Nov 2014, 12:31 pm »
Philips type 80 rectifier, the best type 80 rectifier I have ever heard. Made in Holland.






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