Hi Tom, I'm planning to replace them, I already picked up the parts and am ready to go. It's a nice old McInstosh MA-5100 and I don't want to disfigure it too badly. They're pretty simple through hole connectors with a retaining nut, I'm suspecting it will just be a job of soldering the old wires back to the new lugs (Which I really really hope is simple).
When I did the continuity test I preformed it on several jacks to make sure I didn't just do one that had failed insulation and they all tested as chassis grounded.
As of now I am planning to replace all of the jacks with new ones (I don't want it to look like a hockey player), but that tune may change depending on how much trouble I have getting these out. I may leave the phono jacks and just clean them since they are on a separate plate that is riveted to the chassis and wouldn't look too terribly out of place. I did not check the continuity of the phono jacks, but I think they are also chassis grounded (I will verify prior to changing if I go that route). They did have some resistors coming off of them, but those are connected to signal, I think that's part of the pre-amp for the phono and some tape players that require extra amplification.
I have some experience drilling out homebrew kettles with a step bit, but I am worried they will just end up spinning in there as noted by @Alan4411.
I just got some new side cutters in the mail a few days ago, I guess it's time to see if they are worth their salt! If not, I like the idea of going around the bend on the inside of the pressed jack and weakening the integrity of the material to make it easier to bend/get them out.
Thanks for your time everyone, and the good luck wishes on the ACA!
--Jonathan
As of now I am planning to replace all of the jacks with new ones (I don't want it to look like a hockey player), but that tune may change depending on how much trouble I have getting these out. I may leave the phono jacks and just clean them since they are on a separate plate that is riveted to the chassis and wouldn't look too terribly out of place. I did not check the continuity of the phono jacks, but I think they are also chassis grounded (I will verify prior to changing if I go that route). They did have some resistors coming off of them, but those are connected to signal, I think that's part of the pre-amp for the phono and some tape players that require extra amplification.
I have some experience drilling out homebrew kettles with a step bit, but I am worried they will just end up spinning in there as noted by @Alan4411.
I just got some new side cutters in the mail a few days ago, I guess it's time to see if they are worth their salt! If not, I like the idea of going around the bend on the inside of the pressed jack and weakening the integrity of the material to make it easier to bend/get them out.
Thanks for your time everyone, and the good luck wishes on the ACA!
--Jonathan
It's thin metal. By the time you remove so much it spins, you can take a fine chisel applied sideways to knock one point of the ring "in", and then work it out.
(BTW, this is how you remove cylinder liners on an Allison aircraft engine: grind the liner paper-thin and bump it in. Putting new liners in requires oven, dry ice, and naphtha....)
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.