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Old 30th December 2011, 12:47 AM   #691
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The 9 pin has 10w disipation and is made for telephonerepeaters driving long copper cables.

Have a box to fry so must be tested.
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Old 30th December 2011, 10:43 PM   #692
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I guess you are talking about the 6C19P or another one similar .
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Old 30th December 2011, 10:57 PM   #693
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Something LM Ericsson made for swedish telecom company.
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Old 30th December 2011, 11:36 PM   #694
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So , you will keep it as a secret ?
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Old 31st December 2011, 12:12 AM   #695
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Not a secret just has a number from telecom company no regular tube number and some data from the equipment used in.

Some low Ra variation of Ericssons 6761 perhaps.

Inner structure a bit bigger then a 6BQ5.

Gold pins indicate longlife.

Last edited by flatheadmurre; 31st December 2011 at 12:20 AM.
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Old 1st January 2012, 12:15 AM   #696
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Can you post a picture of it ?
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Old 1st January 2012, 01:33 AM   #697
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IŽll give it a try later when when the new years party gets out of my system.

Wishing you all a happy new Year.
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Old 1st January 2012, 08:11 AM   #698
M Gregg is offline M Gregg  United Kingdom
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Happy New year...

Lets hope it brings good things

Best wishes
M. Gregg
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Old 1st January 2012, 08:24 AM   #699
M Gregg is offline M Gregg  United Kingdom
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Just for fun.

Just trying the HV Mosfet...20A device...


Regards
M. Gregg
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Old 1st January 2012, 08:41 AM   #700
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Looking good !

I switched to a TO-3p to just for comparsion of heat transfer.

Click the image to open in full size.

TO-3/TO-220 didnŽt do much difference when topplate heats up the device drifts a bit.
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