<div dir="ltr">Good advice. Yeah, we aren't dealing with an old radio here. I'll definitely recap the thing before putting power to it again. Thanks everyone.<div>-Kurt</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Dec 28, 2022 at 5:19 PM Dave McGuire <<a href="mailto:mcguire@neurotica.com">mcguire@neurotica.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Yes, definitely. We have a replace-on-sight rule here for Rifa X- <br>
and Y- class capacitors.<br>
<br>
-Dave<br>
<br>
On 12/28/22 17:58, John Hudak via rescue wrote:<br>
> If you are serious about having a serviceable unit,B and minimize the <br>
> risk of the PS taking out critical components on the MB (or elsewhere) <br>
> ust recap the PS.B ESR caps have come a long way since the late <br>
> 90s/early 2000's.B IMHO, if any gear has RIFAs that are more than20-25 <br>
> yo, replace them before turning it on. No sense screwing around with <br>
> iffy old components.<br>
> J<br>
> <br>
> <br>
> On Wed, Dec 28, 2022 at 3:14 PM Jerry Weiss via rescue <br>
> <<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a> <mailto:<a href="mailto:rescue@sunhelp.org" target="_blank">rescue@sunhelp.org</a>>> wrote:<br>
> <br>
> <br>
> On 12/28/22 1:35 PM, Dave McGuire wrote:<br>
>> On 12/28/22 11:42, Kurt Nowak via rescue wrote:<br>
>>> I have not yet taken the PS apart yet, so I haven'tB had a visual<br>
>>> inspection yet and whether it has RIFAs. Either way,B I'm not<br>
>>> going to fire it up withoutB my current limitingB dim-bulb<br>
>>> tester, Variac and Isolation Xformer. Unfortunately the lettering<br>
>>> on the PS is starting to disappearB and cleaning the input side<br>
>>> will most likely erase it all. I think I saw a section in the FE<br>
>>> manual that has a rough description of it. The unit is at another<br>
>>> location for storage so I'll have to take sections of it apart to<br>
>>> move it by myself without breaking my back. Too many other<br>
>>> projects going on at the moment.<br>
>><br>
>> B That's a switching power supply; it will not play nice with a<br>
>> Variac!<br>
>><br>
>> B B B B B B B B B B B B -Dave<br>
>><br>
> <br>
> My own method for vintage electronics with switching power supplies<br>
> is to turn on the device for less than one minute, then leave it<br>
> alone for a 3-5 multiple of the on-time.B Repeat the process a few<br>
> times and slowing increase the on time.B B The concept is to briefly<br>
> charge the electrolytic capacitors, but don't stress them too long.<br>
> This may give them chance to reform their insulating layer and<br>
> endure longer on-times.B If the capacitor has dried out or doesn't<br>
> survive the initial start-cycles then you are SOL.B Use at your own<br>
> risk.<br>
> <br>
> B Jerry<br>
> <br>
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<br>
-- <br>
Dave McGuire, AK4HZ<br>
New Kensington, PA<br>
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</blockquote></div>