| 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. |
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| dhaen |
(As they say your side of the pond ;) )
I can't imagine an application for one, so I'm sure nobody made any. |
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| G |
| I mean a damper diode like a 6au4 with a 5 volt filament. |
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| 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 |
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| 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,;) |
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| 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? |
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| 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. |
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| 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. |
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| 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. :) ) |
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| 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". |
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| igormak |
| quote: | Originally posted by G
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/TechBu...chnoteNo52.html
Rgs, Igor. |
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| G |
I probably will use them in my next project. Either them or some 6au4s. Thanks. |
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