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Cossor 45IU

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Forum » Valves / tubes - Semiconductors » Very rare valves or unknown (not in RMorg) » Cossor 45IU
           
Ken Shellberg
 
 
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01.Jun.20 03:00

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I don't think this is a very rare tube. It turns up on eBay fairly often and I wonder why it isn't in RMorg?

It is the 4-volt version of the Cossor 53KU, which is in RMorg.

Jacob Roschy
Jacob Roschy
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01.Jun.20 08:40

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Hello,

the page for the Cossor 45IU is now created, I hope, the comparison with the 53KU is correct.
Aside the heater voltage the base is different as well.

Best Regards,
Jacob

Ken Shellberg
 
 
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01.Jun.20 14:55

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I have both and the visible construction is identical. I should note that the skinny versions of the 53KU that some have posted are actually Mullard GZ37. Cossor ceased the production of vacuum tubes in the mid-1950's, but still made radios, so they simply sourced the GZ37 from Mullard and relabeled them.

And yes, the 53KU has an octal base and the 45IU has the European B-4 base, as one might expect for a British 4-volt rectiier.

This article was edited 01.Jun.20 14:58 by Ken Shellberg .

Ken Shellberg
 
 
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01.Jun.20 21:13

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Hello Jacob,

> the page for the Cossor 45IU is now created

I don't see a page for the 45iU that allows me to upload a picture? But I am very new here....

And unfortunately, I have not been able to find a data sheet for the 45KU. The British Valve Museum has some data on their site. And according to the document below (I have no idea where I found it or where it came from), the 45IU is equivalent to the MOV U18. This is all I can find...

 

Jacob Roschy
Jacob Roschy
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01.Jun.20 21:52

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Hello Ken,

the page for the Cossor 45IU is still there.

The document on your photo shows a page out of the Tube (or Valve ?) Vademecum.

Jacob

Ken Shellberg
 
 
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01.Jun.20 22:06

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Hello Jacob,

Thank you for pointing me the 45IU page. When I use the search function on the home page, this page doesn't show up. Again, I'm very new here, so perhaps there is a better way to search?

Thanks again,

Ken

 

Jacob Roschy
Jacob Roschy
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01.Jun.20 22:34

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Ken,

to search a tube type, (1) first click on the tab “Tubes + Tr”, (2) then type in your desired tube,
(3) probably you can chose a search condition.

Jacob

Ken Shellberg
 
 
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01.Jun.20 22:36

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Thank you! :)

Ken

  
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