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firing up amps that haven't been used in a while
Post by callumwegener on Oct 27th, 2016, 05:15am

So whats the go with this? I always knew old vintage amps need to slowly powered up by a tech if not used for years. But today i warmed up my SLO-1OO which i brought brand new in 2013 after about 6-8 months or storage at my parents place.

Once I turned standby off after a minute or so, it seemed to take a little longer for sound to come out and there was a buzzy noise (but that buzz seems to have gone and was linked to dusty volume pot).

Hopefully I'll be jamming with it once a week from now on, but what harm if any is done to amps that aren't played much? I always used to at least plug it in at bedroom volume once a week, but can't do that anymore as i'm not living with my folks.

Im probably just overthinking everything, but I'm very fussy with my amps and like to keep them in tip top shape smiley




Re: firing up amps that haven't been used in a whi
Post by Giga on Oct 27th, 2016, 05:58am

That has to do with the big capacitors. When they've been in an uncharged state for longer periods it seems they can take quite a hit when powered up.

In vintage amp land where some prefer to keep un amp as original as possible that can be an issue.

What they do is power it up via a voltage regulator (Variac) at a much lower than usual voltage to allow the caps to wake up in a more relaxed fashion.

I wouldn't sweat it with your SLO. That baby can take it !

Giga
Re: firing up amps that haven't been used in a whi
Post by callumwegener on Oct 27th, 2016, 9:49pm

Great! I also gave the shop a quick call (as I'm ringing from Australia haha), and Mike answered the phone and confirmed this too.

Rock on! here's my beasts :

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Re: firing up amps that haven't been used in a whi
Post by RMS on Dec 23rd, 2016, 9:40pm

Nice. I sold off all my 100W Marshalls around 2000. I wish I'd held on to my 1979 2203 (single channel, master volume). It was my goto for a decade or so.

On the bright side, selling those let me buy my SLO. I still have the '79 Marshall 4x12 w/ the original G12-65's in it. I've used it with the SLO. I love the combination.