[ARC5] ARC R-511 Capacitor Failure

[kn7sfz]

So, if you have a radio that is otherwise running fine with the original 
caps, what might be a proper size fuse to put inline with the HV to 
protect the dynamotor and everything else downstream? (unobtrusive mod 
easily reversed)

Thanks for any input,

de Richard kn7sfz



On 1/28/2019 1:12 PM, Kenneth G. Gordon wrote:
> On 28 Jan 2019 at 20:58, J Mcvey via ARC5 wrote:
>
>> The filter cap on the HV line is the only one I've seen totally short. the others are
>> usually just leaky as hell.
> I had one of those triple section 0.22 mfd job short out while I was using a receiver. As you
> say, bogged the dynamotor down like mad. Lucky I was right beside it when this happened.
>
>> I had a similar event with an ARC-5 R-23 . It was running fine for about an hour
>> when all of a sudden i heard the dynamotor bog down and the radio went dead. I
>> was right next to it, so i hit the switch quickly. Fortunately ,there was no
>> explosion. After that, my SOP is open and re-stuff all of the "flower pots".
>> Even the leaky ones degrade the performance and cause a higher current drain,
>> so it's better to replace them and be done with it.
> I completely agree with you on this one. By now ALL of those things are leaking or shorted.
>
> If one wants to have his receiver remain completely stock, then put it on a shelf and look at
> it.
>
> If one wants to have his receiver LOOK completely stock, yet wants to USE it, then restuff
> them.
>
> Otherwise replace every darned one of them with modern caps, before something
> irreplaceable burns up.
>
> Ken W7EKB
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