5v Damper Diode?

G · 5th June 2004, 01:50 PM

Did they make 5 volt Damper diodes back in the good ole days? I would like to try a couple in the PSU for my linestage.

dhaen · 5th June 2004, 05:15 PM

(As they say your side of the pond

)

I can't imagine an application for one, so I'm sure nobody made any.

G · 5th June 2004, 06:22 PM

I mean a damper diode like a 6au4 with a 5 volt filament.

DougL · 5th June 2004, 06:49 PM

The application note for the 6D22S indicates it will run on 5 or 6.3 volts.

Tech Note for 6D22S

I got 6 receintly on e-bay for under $5 ea. otherwise hard to find.

Enjoy;

Doug

fdegrove · 5th June 2004, 08:24 PM

Hi,

Since you I assume you have 5V AC and this is for a linsestage, why use a FWB rectifier?
You'll have about 7V DC. Add a dropping resistor to arrive at 6.3V and you can use small dampers such as the 6S2/EY86s?

Cheers,

G · 6th June 2004, 01:36 AM

Actually I was thinking of using a couple of tube damper diodes to make the bipolar PSU for my buffered linestage. They are supposed to be much quieter than anything else in power supply rectification. I didn't want to run the diodes off of the heater winding so as to avoid any interaction between the tube heaters and the PSU rectification. That may sound a little silly but that is how I'm looking at it. Are my concerns unfounded?

Eli Duttman · 6th June 2004, 03:17 AM

G,

Use a Chinese 5AR4 for the tube half of your hybrid bridge. The forward voltage drop in a 5AR4 is not much greater than that in dampers, particularly at low preamp currents. UF4007s will take care of the SS half of the bridge nicely.

Circlotron · 6th June 2004, 12:08 PM

If it's only a line amp where the current drain is not too high, 5 volts might well be enough for a 6v3 heater anyway.

Majestic · 6th June 2004, 07:56 PM

somwhat OT; but anyone care to reccomend a damper diode that has good sound, and likely to be somewhat available in NOS from both UK and USA manufacturers?

(No duodecar bases, but 'strange' filament voltages and top-caps are ok. Oh, a slow warm-up would naturally be good too.

)

Eli Duttman · 6th June 2004, 09:24 PM

Majestic,

The 6AU4 is a very safe bet in damper diodes. Damper diodes turn on very slowly; a 5AR4 is faster. SED currently offers the 6D22S; it uses a tiny cathode cap and a Magnoval socket.

You can get a feel for what's available by searching AES' (www.tubesandmore.com) web site for "damper".

5th June 2004, 01:50 PM	#1
G diyAudio Member Join Date: Apr 2002 Location: Belleville, IL.	5v Damper Diode? Did they make 5 volt Damper diodes back in the good ole days? I would like to try a couple in the PSU for my linestage. __________________ Gavin

5th June 2004, 05:15 PM	#2
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Rare as hens teeth (As they say your side of the pond ) I can't imagine an application for one, so I'm sure nobody made any.

5th June 2004, 06:22 PM	#3
G diyAudio Member Join Date: Apr 2002 Location: Belleville, IL.	I mean a damper diode like a 6au4 with a 5 volt filament. __________________ Gavin

5th June 2004, 08:24 PM	#5
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	Hi, Since you I assume you have 5V AC and this is for a linsestage, why use a FWB rectifier? You'll have about 7V DC. Add a dropping resistor to arrive at 6.3V and you can use small dampers such as the 6S2/EY86s? Cheers, __________________ Frank

6th June 2004, 01:36 AM	#6
G diyAudio Member Join Date: Apr 2002 Location: Belleville, IL.	Actually I was thinking of using a couple of tube damper diodes to make the bipolar PSU for my buffered linestage. They are supposed to be much quieter than anything else in power supply rectification. I didn't want to run the diodes off of the heater winding so as to avoid any interaction between the tube heaters and the PSU rectification. That may sound a little silly but that is how I'm looking at it. Are my concerns unfounded? __________________ Gavin

5th June 2004, 06:49 PM	#4
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	The application note for the 6D22S indicates it will run on 5 or 6.3 volts. Tech Note for 6D22S I got 6 receintly on e-bay for under $5 ea. otherwise hard to find. Enjoy; Doug

6th June 2004, 03:17 AM	#7
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	G, Use a Chinese 5AR4 for the tube half of your hybrid bridge. The forward voltage drop in a 5AR4 is not much greater than that in dampers, particularly at low preamp currents. UF4007s will take care of the SS half of the bridge nicely. __________________ Eli D.

6th June 2004, 12:08 PM	#8
Circlotron diyAudio Member Join Date: Jun 2002 Location: Melbourne, Australia	If it's only a line amp where the current drain is not too high, 5 volts might well be enough for a 6v3 heater anyway. __________________ Best-ever T/S parameter spreadsheet. http://www.diyaudio.com/forums/multi...tml#post353269

6th June 2004, 07:56 PM	#9
Majestic diyAudio Member Join Date: Mar 2004 Location: Melbourne	somwhat OT; but anyone care to reccomend a damper diode that has good sound, and likely to be somewhat available in NOS from both UK and USA manufacturers? (No duodecar bases, but 'strange' filament voltages and top-caps are ok. Oh, a slow warm-up would naturally be good too. ) __________________ check out my avitar and go easy on me ok? :-)

6th June 2004, 09:24 PM	#10
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	Majestic, The 6AU4 is a very safe bet in damper diodes. Damper diodes turn on very slowly; a 5AR4 is faster. SED currently offers the 6D22S; it uses a tiny cathode cap and a Magnoval socket. You can get a feel for what's available by searching AES' (www.tubesandmore.com) web site for "damper". __________________ Eli D.

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