Vacuum Tube OTL power amp!! - Page 70

flatheadmurre · 30th December 2011, 12:47 AM

The 9 pin has 10w disipation and is made for telephonerepeaters driving long copper cables.

Have a box to fry so must be tested.

Dimitris AR · 30th December 2011, 10:43 PM

I guess you are talking about the 6C19P or another one similar .

flatheadmurre · 30th December 2011, 10:57 PM

Something LM Ericsson made for swedish telecom company.

Dimitris AR · 30th December 2011, 11:36 PM

So , you will keep it as a secret ?

flatheadmurre · 12:20 AM

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.

Dimitris AR · 1st January 2012, 12:15 AM

Can you post a picture of it ?

flatheadmurre · 1st January 2012, 01:33 AM

I´ll give it a try later when when the new years party gets out of my system.

Wishing you all a happy new Year.

M Gregg · 1st January 2012, 08:11 AM

Happy New year...

Lets hope it brings good things

Best wishes
M. Gregg

M Gregg · 1st January 2012, 08:24 AM

Just for fun.

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

Regards
M. Gregg

flatheadmurre · 1st January 2012, 08:41 AM

Looking good !

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

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

31st December 2011, 12:12 AM	#695
flatheadmurre diyAudio Member Join Date: Mar 2011 Location: Jarna	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.

1st January 2012, 08:11 AM	#698
M Gregg diyAudio Member Join Date: Jun 2010 Location: UK	Happy New year... Lets hope it brings good things Best wishes M. Gregg __________________ What is the sound of one hand clapping?

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30th December 2011, 12:47 AM	#691
flatheadmurre diyAudio Member Join Date: Mar 2011 Location: Jarna	The 9 pin has 10w disipation and is made for telephonerepeaters driving long copper cables. Have a box to fry so must be tested.

30th December 2011, 10:43 PM	#692
Dimitris AR diyAudio Member Join Date: Nov 2011 Location: Athens	I guess you are talking about the 6C19P or another one similar .

30th December 2011, 10:57 PM	#693
flatheadmurre diyAudio Member Join Date: Mar 2011 Location: Jarna	Something LM Ericsson made for swedish telecom company.

30th December 2011, 11:36 PM	#694
Dimitris AR diyAudio Member Join Date: Nov 2011 Location: Athens	So , you will keep it as a secret ?

1st January 2012, 12:15 AM	#696
Dimitris AR diyAudio Member Join Date: Nov 2011 Location: Athens	Can you post a picture of it ?

1st January 2012, 01:33 AM	#697
flatheadmurre diyAudio Member Join Date: Mar 2011 Location: Jarna	I´ll give it a try later when when the new years party gets out of my system. Wishing you all a happy new Year.

1st January 2012, 08:41 AM	#700
flatheadmurre diyAudio Member Join Date: Mar 2011 Location: Jarna	Looking good ! I switched to a TO-3p to just for comparsion of heat transfer. TO-3/TO-220 didn´t do much difference when topplate heats up the device drifts a bit.