sodawillow Posted November 16, 2020 Share Posted November 16, 2020 Hello, I'd like to add the missing part in this amp, but I'm not sure what is missing precisely (fuse only or fuse and holder) and where I could buy it? Thanks in advance if anyone can guide me! Quote Link to comment Share on other sites More sharing options...
jdgm Posted November 17, 2020 Share Posted November 17, 2020 (edited) The fuse and the cap which holds it. You will have to buy a new fuse holder which will include the cap (the fuse sits in the cap). Desolder/remove the old one and measure it (length and diameter), also note the length of the wiring soldered to it and the diameter of the hole in the chassis plate. I'd be tempted to clean it up a bit! Keep the old retaining washer and fuse holder. A new fuse holder is very cheap but I doubt if you would be able to exactly match it to the old one. Ideally you need to know the value and size/length of the fuse which fits in there first, too. Err on the long side (this will only be 1 or 2 mm). I googled for images - you can just about see what the cap looks like - https://www.google.com/search?q=fuse+for+gibson+ga-8t+discoverer+&tbm=isch&ved=2ahUKEwjalsL5y4rtAhVClBoKHX06DG0Q2-cCegQIABAA&oq=fuse+for+gibson+ga-8t+discoverer+&gs_lcp=CgNpbWcQA1DN0QJYnIQDYJCMA2gAcAB4AIABUIgBjgWSAQIxMJgBAKABAaoBC2d3cy13aXotaW1nwAEB&sclient=img&ei=EUq0X5rKGsKoav30sOgG&bih=1086&biw=1920&client=firefox-b-d#imgrc=GpZz6U70vCearM As to the fuse itself, check amp schematic thoroughly. Fuse value shouldn't be any problem. https://www.google.com/search?source=univ&tbm=isch&q=gibson+ga-8t+discoverer+schematic&client=firefox-b-d&sa=X&ved=2ahUKEwjQgq_2yYrtAhXWMMAKHS2fA1UQjJkEegQIDxAB&biw=1920&bih=1086#imgrc=_btJjDbT29hYPM Good luck! Edited November 17, 2020 by jdgm Quote Link to comment Share on other sites More sharing options...
sodawillow Posted November 17, 2020 Author Share Posted November 17, 2020 Hello and first, thank you very much, I kinda was thinking the remaining part would need to be removed. Anyway your message is very helpful to me. I was about to ask about where I could find the schematics but it was just one click away in your messagen, thanks again.Desolder/remove the old one and measure it A part being missing, would the measurement still be meaningful? I was advised by a good friend to use a 1A 6x32 fuse and this kind of holder [image]. Please tell me what to think. I don't have good soldering capacities, but I have friends who are more capable : ). Have a good night or day (live from Paris, France). Cheers Quote Link to comment Share on other sites More sharing options...
jdgm Posted November 18, 2020 Share Posted November 18, 2020 (edited) You only need to measure the old one in order to ensure the new one is (approximately) the same size. I think the fuse is a 1 amp from what I can see of the schematics online (lower right next to on/off) but I'm no expert - and you need to be very sure about it! My experience is that I had to replace the fuse holder in my Fender Twin II. They just get very hot, bake and get brittle and crumble over time. I bought a generic fuse holder which was a tiny bit shorter than the original, and found the wires that needed to be soldered to it were now too short to reach it! I managed it in the end but that sort of thing can ruin your day. Edited November 18, 2020 by jdgm Quote Link to comment Share on other sites More sharing options...
Bill Moore Posted November 20, 2020 Share Posted November 20, 2020 Check these out, if lucky one is the same, and you just need to replace the cap. https://www.tubesandmore.com/search/node/fuse holder Quote Link to comment Share on other sites More sharing options...
sodawillow Posted May 9, 2021 Author Share Posted May 9, 2021 (edited) Hello again, A friend of mine is helping me with this, we seem to have the fuse/holder part covered. Now we're trying to test the components and identify the dead ones to replace them. We have trouble identifying this dude though (see attached pictures). I'd say a resistor since it's marked 250 Ω but my friend says it does not look like a classic resistor (obviously). Can anyone help me here? Thanks https://ibb.co/r43rM9zhttps://ibb.co/kGz01F6 Edited May 9, 2021 by sodawillow Quote Link to comment Share on other sites More sharing options...
sodawillow Posted May 9, 2021 Author Share Posted May 9, 2021 (edited) And here you'll find attached the other suspects in our case 🙂 https://ibb.co/z4qCYw2https://ibb.co/kxdTqV2https://ibb.co/SvMy5b2 Edited May 9, 2021 by sodawillow Quote Link to comment Share on other sites More sharing options...
Dub-T-123 Posted May 10, 2021 Share Posted May 10, 2021 😬 your friend doesn’t sound like a good choice for this project. Those parts are all easily identifiable be careful!!! 1 Quote Link to comment Share on other sites More sharing options...
sodawillow Posted May 10, 2021 Author Share Posted May 10, 2021 (edited) Hello, Don't be so harsh 🙂 he's not an expert but he is very careful, that's for instance why I posted these pics here. Even if it looks easy for you, I'd appreciate your input : ) we just want the amp to operate again 🙂. We're both learning on this one, and we prefer to do this ourselves, it's more interesting that way ; we are and will be very careful. So the first one is a 250 ohm resistor? Then again a resistor, we'll check the color code to get the value. Then the ones marked "paktron", I don't know what they are, maybe capacitors? And the last pic is defo a capacitor, 80MFD meaning 80µFarads? Or does the capital M really stand for mega? Again, it sure must be obvious to an advanced electronics fiddler, but not to us. So please be forgiving with us 🙂. Cheers Edited May 10, 2021 by sodawillow Quote Link to comment Share on other sites More sharing options...
Dub-T-123 Posted May 11, 2021 Share Posted May 11, 2021 I don’t wanna be rude but your friend sounds like a rank amateur and the best help I can give you is to suggest taking it to an actual amp tech. Quote Link to comment Share on other sites More sharing options...
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