Diode selection help

[ketchup]

Can anyone tell me if these diodes will work in my Audio Research LS-7 tube preamp? The factory parts are:

D1-4: IN4006
D7-10: IN4005 General Instrument

For D1-4 I was told to use Fairchild ISL9R8120P2
For D7-10 I was told to use Schottky STPS8H100D

Here's a schematic for the preamp.
403 Forbidden
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I appreciate the help!

Edit: The schematic can be seen here if the links above don't work:
http://www.arcdb.ws/LS7/LS7.html

 

[rayma]

Can anyone tell me if these diodes will work in my Audio Research LS-7 tube preamp?
The factory parts are😀1-4: IN4006 D7-10: IN4005

The Fairchild ISL9R8120P2 package is different, otherwise it's ok.

The Schottky STPS8H100D is only 100V, compared to the IN4005 600V rating.
That should work adequately in this circuit. The package is different as well.

 

[ketchup]

Thanks for the reply! By different packaging, you're referring to the physical layout of the diode, right? The legs should be long enough to reach the holes in the PCB if bent slightly.

I also noticed the 600V rating of IN4005, but the cap right next to it (C16) has a rating of 63V. I'm not sure why they used a diode with a 600V rating for D7-10.

I have these diodes already so I'll use them, but if someone wanted to use all Fairchilds, would the Fairchilds work for D7-10? I can't remember why these particular diodes were recommended to me years ago.

 

[rayma]

if someone wanted to use all Fairchilds, would the Fairchilds work for D7-10?

Yes, sure. The leads on these packages are fragile and will break if bent sharply or repeatedly.
Remember that the tabs are hot electrically. Don't let them touch anything else.

 

[trobbins]

ketchup, would I be guessing correctly that there is nothing technically wrong with your preamp or the diodes in the amp?

Do you know why you were told to use anything but the 1N400x series diodes?

Those suggested diodes imho are a technical nonsense to use in that application.

 

[merlin el mago]

For D1-4 1N4006 800V 1A
C3D02060F Silicon Carbide Schottky Diode Z-Rec® Rectifier (Full-Pak) 600V can be enough 2A