[Amps] Henry 3K trouble

Steve Thompson g8gsq at eltac.co.uk
Tue Oct 31 18:15:51 EST 2006



Ian White GM3SEK wrote:
> A.R.S. -  W5AMI wrote:
>> Just took D105 and C105 out of the circuit and removed C105 off of
>> D105.  D105 is shorted both ways, so I'm going to go ahead and replace
>> it and C105 before I go any further.  Maybe this will be the simple
>> solution.  I hope!
>>
> 
> This diode is meant to handle the current surge, not be destroyed by it. 
> Many older amps use "1-amp" diodes like the 1N4001-4007 series, which 
> don't have a high enough surge current rating.
> 
> The replacement should be at least a "3-amp" diode like the 1N5400-5408, 
> or better still one of the big fat 6A diodes like the GI750 or P600 
> series.
> 
> Peak  inverse voltage doesn't matter in this application, so you could 
> use any diode that has a high enough current rating.
I can't believe how cheap 25 or 35A bridges are. Use the two ac 
terminals and you get two diodes in series back to back, with a rating 
that will laugh at any glitch current.

Steve


More information about the Amps mailing list