[Amps] Alpha 76 "SNAP" noise

[Alek Petkovic]

BANG!

Yep. They were talking about the electrolytics.

Change 'em, before you have to change your underwear.

73, Alek.
VK6APK

On 24/12/2014 7:59 AM, John G3UUT wrote:
> Sorry folks, are we talking about the string of smoothing 
> electrolytics or a ceramic RF filter cap here?  I'm curious about this 
> as when I switched my 2m amp on recently which hadn't been used for 
> about a year there was a regular series of 'snaps', the frequency of 
> which gradually diminished as it warmed up.  I was worried by this but 
> it didn't seem catastrophic and seemed to be improving with time so I 
> left the amp on.  By the end of the contest the amp was usable 
> (typical) - I couldn't really use it earlier as the snaps put quite a 
> high level pulse of QRM into the RX path.
>
> 73 John G3UUT
>
> On 23/12/2014 11:08, Andy Cook, G4PIQ wrote:
>> Oh yes. I heard this coming from one of our old Alpha 78s during CQWW 
>> CW at 5U5Z some years ago. It did this for quite a few hours and then 
>> in the middle of the night there was a big bang and the room filled 
>> with smoke as one of the filter caps let go. It certainly woke the 
>> operators up. I should change those caps now!
>>
>> 73
>>
>> Andy, G4PIQ
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>
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