[Boatanchors] 6x5 Rectifiers Used In TCS Shore P/S
WA5CAB at cs.com
WA5CAB at cs.com
Thu Aug 25 12:25:02 EDT 2016
They are reliable, as are the pair of either 5R4GY or 5U4G rectifiers that
are also present. The shipboard and shore AC rectifier supplies are open (no
cover or cage over the top of the components) so there is no heat build up
to worry about. I would make sure that one set of spares that may never get
used are present and leave them be. The performance of the supply or the
radios will not be improved by changing them. And you will loose the soft start
characteristic that vacuum rectifiers provide a little of.
However, what you should replace without bothering to determine whether or
not it is still working is the dry disc 12VDC supply rectifier. It may be
copper oxide, in which case it may still work. Or it may be selenium in which
case it most likely does not, or if it appears to work, you aren't yet
seeing the characteristic decline of front to back ratio and the increase in
forward resistance. Replace it with a 50 PIV or higher 3 AMP or higher silicon
bridge rectifier selected for its packaging being the most convenient. If you
pull the stud that usually runs through a dry disc type, you can mount the
replacement to one of the el-brackets.
In the unlikely event that you are working on a PP-380/URR, I have further
comments.
Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
In a message dated 08/25/2016 09:35:45 AM Central Daylight Time,
boatanchors at mailman.qth.net writes:
> Guys,
> I am reworking a TCS shore power supply and want to get some feedback
> concerning the 6X5 rectifiers (uses 2). Is it worth solid stating them? If they
> are reliable I was thinking to just leave them in there...
> Thanks in advance...
> Bill N3WM
>
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