6v 5AR4?

pftrvlr · 8th February 2008, 06:52 AM

Is there any 6v rectifier tube can allow 250ma?

Thanks,

Fuling · 8th February 2008, 07:08 AM

6AU4GTA damped diodes should do, but you will need two of them as they are single diodes.

pftrvlr · 8th February 2008, 07:13 AM

Hmm, the spec say 175ma:

http://tdsl.duncanamps.com/show.php?des=6AU4GTA

Colt45 · 8th February 2008, 08:56 AM

175 x 2

Bandersnatch · 8th February 2008, 12:00 PM

hey-Hey!!!,
There are also the big 9-pin types, 6DN3 for one. A pair of those could supply a half an amp( that's short for Ampere, not part of an amplifier ). It will drop only 14V at 350 mA of plate current, so you could build a 700 mA PS with a pair of these...

cheers,
Douglas

dhaen · 8th February 2008, 03:01 PM

Another benefit of TV damper diodes is their extremely high heater to cathode insulation (normally a ceramic sleeve). This means you can use a near-earth 6.3 volt source, though I wouldn't mix it with any small-signal stage heaters.

pftrvlr · 8th February 2008, 08:40 PM

I also find out 6DM4A and 6DA4A have the similar spec.

Anyone has experiences with 6DM4A? They appear to be more expensive than 6AU4.

ray_moth · 9th February 2008, 01:32 AM

Svetlana's 6D22S TV damper diodes seem pretty good. They tolerate up to 600v heater-cathode, making them versatile. These are in current production.

The only downsides are that they are single diodes, they use a top cap for the cathode and they use the 9-pin magnoval socket, which is octal-size but can be hard to find.

8th February 2008, 06:52 AM	#1
pftrvlr diyAudio Member Join Date: Feb 2007 Location: SoCal	6v 5AR4? Is there any 6v rectifier tube can allow 250ma? Thanks,

8th February 2008, 12:00 PM	#5
Bandersnatch diyAudio Member Join Date: Jul 2003 Location: Ann Arbor, MI	hey-Hey!!!, There are also the big 9-pin types, 6DN3 for one. A pair of those could supply a half an amp( that's short for Ampere, not part of an amplifier ). It will drop only 14V at 350 mA of plate current, so you could build a 700 mA PS with a pair of these... cheers, Douglas __________________ the Tnuctipun will return

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8th February 2008, 07:08 AM	#2
Fuling diyAudio Member Join Date: Aug 2001 Location: Sweden (Mora)	6AU4GTA damped diodes should do, but you will need two of them as they are single diodes.

8th February 2008, 07:13 AM	#3
pftrvlr diyAudio Member Join Date: Feb 2007 Location: SoCal	Hmm, the spec say 175ma: http://tdsl.duncanamps.com/show.php?des=6AU4GTA

8th February 2008, 08:56 AM	#4
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	175 x 2

8th February 2008, 03:01 PM	#6
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Another benefit of TV damper diodes is their extremely high heater to cathode insulation (normally a ceramic sleeve). This means you can use a near-earth 6.3 volt source, though I wouldn't mix it with any small-signal stage heaters.

8th February 2008, 08:40 PM	#7
pftrvlr diyAudio Member Join Date: Feb 2007 Location: SoCal	I also find out 6DM4A and 6DA4A have the similar spec. Anyone has experiences with 6DM4A? They appear to be more expensive than 6AU4.

9th February 2008, 01:32 AM	#8
ray_moth diyAudio Moderator Emeritus Join Date: Jan 2004 Location: Jakarta	Svetlana's 6D22S TV damper diodes seem pretty good. They tolerate up to 600v heater-cathode, making them versatile. These are in current production. The only downsides are that they are single diodes, they use a top cap for the cathode and they use the 9-pin magnoval socket, which is octal-size but can be hard to find.