26-08-2022, 09:36 PM
Hi Trevor
The are still in circuit as I thought I would make a quick look first (yes if connected to other components it will alter the readings). Of course, I can remove (carefully) both of them and retest. It would not surprise me if though the green 2SJ82 HAS failed and therefore did blow the fuse. Logic suggests that this was the reason, as was indicated, why the original speaker was blown. I wish now that I had done more research (you are correct of course in indicating 'a little knowledge') about this amp BEFORE my friend bought it, as the vast majority of this age up for sale are indicated to have major hums, severe crackles OR are not working which all point at this power amp.
I feel terrible about this now and feel completely wrong in my approach. I even thought about looking for equivalent Mosfets but as we have discussed, if there is anything else that is wrong then I will be back to square one!
Learning curve for me yet again.
Best Regards
Rob
The are still in circuit as I thought I would make a quick look first (yes if connected to other components it will alter the readings). Of course, I can remove (carefully) both of them and retest. It would not surprise me if though the green 2SJ82 HAS failed and therefore did blow the fuse. Logic suggests that this was the reason, as was indicated, why the original speaker was blown. I wish now that I had done more research (you are correct of course in indicating 'a little knowledge') about this amp BEFORE my friend bought it, as the vast majority of this age up for sale are indicated to have major hums, severe crackles OR are not working which all point at this power amp.
I feel terrible about this now and feel completely wrong in my approach. I even thought about looking for equivalent Mosfets but as we have discussed, if there is anything else that is wrong then I will be back to square one!
Learning curve for me yet again.
Best Regards
Rob
if all else fails...read the instructions!
