Re: [CAD_CAM_EDM_DRO] Re: Need 1N4437 bridge rectifier...

Hi folks,

Let me try to help a little. I may be misunderstanding this, but here is
what may be going on. A 1N4437 is just a big diode. It sounds to me like
there was just one in there, i.e. a half wave rectifier. Further, it
sounds like it has been replaced with a full wave bridge. Going from
half to full wave rectification would just about double the current
through the coil so I would expect it to run hotter. Assuming an
averaging type meter was used, this would also explain the voltage
readings.

Jeff

On Thu, 14 Sep 2000 13:54:19 -0000, someone wrote:

>....snip....
>"Anyone know a source for this item? Mounts with a 1/4" bolt on the
>back. Metal case. At 110V ac input, ouput is 90V dc. Probably
>about 10 amp rating.
>
>....snip....
>
>Lacking the exact part number I replaced it with one of those plastic
>cased rectifiers with 30A rating. Output is around 110V dc. Seems
>like the clutch actuating coils are running a little hot, although I
>can't say for sure since I never checked them until now."
>
>The original 1N4437 has a 1/4" stud protruding from the back and a
>metal case. The new rectifier is square plastic cased with a smaller
>than 1/4" mounting hole through the center.