OTL, continued...

Joel · 8th January 2003, 06:33 PM

Well, after some suggestions, this is what I've got so far. How is this looking?

dhaen · 8th January 2003, 06:49 PM

You cannot be serious

Joel · 8th January 2003, 06:54 PM

What do you mean John?

fdegrove · 8th January 2003, 06:55 PM

Hi,

The other OTL thread full than?

Cheers,

dhaen · 8th January 2003, 07:00 PM

1) You have a constant voltage load in the cathode of your driver. Where's the signal going to go?
2) The idea of the cathode choke was to get rid of the very lossy resistor in the cathode. You've still got one! No wonder our banter about cathode chokes made no sense..

fdegrove · 8th January 2003, 07:08 PM

Hi John,

Since no value is specified it could a 0 Ohm jumper?

Cheers,

dhaen · 8th January 2003, 07:11 PM

Well it wouldn't be a:

Quote:

PIECE DE RESISTANCE

then, would it?

Joel · 8th January 2003, 07:12 PM

Quote:

Originally posted by dhaen
1)You have a constant voltage load in the cathode of your driver. Where's the signal going to go?

Explain further. Do I need a resistive load above the gas tube?

Quote:

2) The idea of the cathode choke was to get rid of the very lossy resistor in the cathode. You've still got one!

I need to bias the output tubes, and the point of the choke is to replace RL, not Rk... and in that capacity it's keeping another 30 watts out of the chassis.

3) Lose the attitude.

fdegrove · 8th January 2003, 07:20 PM

Hi,

Joel,I don't think that OD3 is going to put out 150V all by it self.

Cheers,

dhaen · 8th January 2003, 07:24 PM

Quote:

Explain further. Do I need a resistive load above the gas tube?

Joel,
The constant voltage of the gass tube is exactly the opposite of what you want. If you want to be "smart", add a constant current source.
Gas tubes are good in common cathode. Not in cathode follower mode.

8th January 2003, 06:55 PM	#4
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	OTL CONTINUED. Hi, The other OTL thread full than? Cheers, __________________ Frank

8th January 2003, 07:08 PM	#6
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	PIECE DE RESISTANCE Hi John, Since no value is specified it could a 0 Ohm jumper? Cheers, __________________ Frank

8th January 2003, 07:20 PM	#9
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	GLOWDISCHARGE Hi, Joel,I don't think that OD3 is going to put out 150V all by it self. Cheers, __________________ Frank

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8th January 2003, 06:54 PM	#3
Joel diyAudio Member Join Date: Oct 2002 Location: Brooklyn, NY	What do you mean John?

8th January 2003, 07:00 PM	#5
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	1) You have a constant voltage load in the cathode of your driver. Where's the signal going to go? 2) The idea of the cathode choke was to get rid of the very lossy resistor in the cathode. You've still got one! No wonder our banter about cathode chokes made no sense..

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