Hey,
With Brisbane weather putting the kybosh on my guitar painting I'd scheduled for last weekend, I decided to pull apart a Harkte GT-100 combo amp that a mate gave me a few years ago. I'd used it sporadically as the input jack was wobbly, so I thought I would have a go at seeing if I could fix it.
Not an easy thing to dismantle, it looks like the main board is put in the chassis first, then everything else put in around or on top of it. So that means pulling literally everything out of the chassis just to get the main board so I could desolder the input jack.
So here it is:
You can see it's not quite right. But better than I thought it would be. Nevertheless, I emailed the Electric Factory, who are the Aussie agents for Hartke, asking if I could get a new jack for it. Their answer was a one-liner: "That amp is superceded, parts no longer available". Probably didn't even check, the reply was that quick. Surely that type of jack is used on other Hartke amps as well...
By the look of it, it's not a standard part that Jaycar would stock (already checked, nothing in their website stock looks remotely like it).... but I will probably go down there this weekend and try anyway.
Apart from the ground and live/signal there are two other terminals that are shorted together when there's no plug inserted, and open when there is. From the schematic (snip below), looks like they are used to short the input to ground.
There appears to be enough room for me to put a standard 1/4" jack in the front panel and run fly leads back to the board. Easy enough. But wondering about the implications of not having that short in place when there's no plug inserted. I can only assume that the short is to eliminate spurious noise when there's no cable plugged in, but I could be wrong.
Anybody seen one of these plugs before? Or know where I could get one?
Cheers,
Pete