5v Damper Diode?

[G]

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]

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.

 

[G]

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

 

[DougL]

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]

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]

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]

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]

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]

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]

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".

 

[igormak]

They are supposed to be much quieter than anything else in power supply rectification. [/B]

Hi!

G, seems to be it's a good idea to use 6d22. It has some advantages. Svetlana still manufacture them. Read the article by Erick Barbour, pls.

http://www.svetlana.com/docs/TechBulletins/technoteNo52.html

Rgs, Igor.

 

[G]

Hi!

G, seems to be it's a good idea to use 6d22. It has some advantages. Svetlana still manufacture them. Read the article by Erick Barbour, pls.

http://www.svetlana.com/docs/TechBulletins/technoteNo52.html

Rgs, Igor.

I probably will use them in my next project. Either them or some 6au4s. Thanks.