[Amps] Alpha 76 "SNAP" noise

[John G3UUT]

Thanks, looks like I got a timely warning I'll change them pronto.  Has 
anybody looked into this? You would think that a small breakdown / 
healing of the dielectric would be muffled by the can and not cause such 
a staccato snap.

73 John

On 24/12/2014 02:10, Carl wrote:
> HV electrolytics and their associated components John.
>
> Carl
> KM1H
>
>
>
> ----- Original Message ----- From: "John G3UUT" <amps at grebe.plus.com>
> To: <amps at contesting.com>
> Sent: Tuesday, December 23, 2014 6:59 PM
> Subject: Re: [Amps] Alpha 76 "SNAP" noise
>
>
>> 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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