Re: [Amps] L4B HV diodes

[craxd <craxd1@ezwv.com>]

Yuri,
Not necessarily, you may get by with replacing the one diode with the 
1N5408. I think the 1N5406 is the 600 V, 3 amp. They should all have a 
drop of about 0.7 volts a piece. I only found one data sheet for this on 
the web and it was a pay site. It's a wonder they didn't all fail from 
the domino effect. But, if you want to replace them all, get some good 
solder wick and go at it. To find an original M4G5, you'd probably have 
to search about all the surplus houses. A Google search didn't find any 
for sale anywhere. I still don't think it would cause too much of a 
problem just replacing that one, if it's the only bad one in the string. 
About the only way to tell for sure if they're good or not is run a 
hi-pot test for leakage on each.

Best & 73's

Will Matney

Yuri Onipko wrote:

> Will, thanks a lot for reply.
> Yes, I know about 1N5408 and I just bought a bunch of them here in Toronto
> for 25 cents a piece.
> But my question was regarding original M4G5.
> I have only 1 blown diode, but now I have to replace all 14!
>
> 73  Yuri  VE3DZ
> ----- Original Message ----- 
> From: "craxd" <craxd1@ezwv.com>
> To: <amps@contesting.com>
> Sent: Monday, October 04, 2004 10:13 PM
> Subject: [Amps] L4B HV diodes
>
>
>  
>
> > Yuri,
> > The M4G5 is a 600 Volt, 3 amp diode. I would replace it with a 1N5408
> > which is a 1000 Volt, 3 amp. The case style is different but is the same
> > type (rectifier) diode.
> >
> > Will Matney
> >
> >
> > Hi,
> > anybody knows if M4G5 diodes(used in Drake L4B amp. PS) are still
> >    
> available?
>  
>
> > If so, what is the source? I don't need many, just a few.
> > Thanks.
> > Yuri  VE3DZ
> >
> >    
>
>
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