While it is being serviced, have them thoroughly clean those old rca jacks:
Those old McIntosh jacks are close together, hard to clean, and not gold plated, subject to corrosion.
My vintage McIntosh Preamp mx110z (from the 1960’s). I was in a hurry to hear it, gave them a simple cleaning, hooked it up.
Last week, disconnected, took down to the shop, used very fine Emory cloth, super fine steel wool to remove corrosion, used tight rca jack pushed repeatedly in/out, alcohol, compressor. IOW, a real cleaning inside and out of the jacks.
I figured out a trick that led to greater success: I got a length of 1/2" wide leather (could use strong cloth) to make a loop around the jack, and put a thin layer of steel wool inside the loop, pulled the loop up/down without needing room to jamb my fingers between the tightly spaced jacks.
Made a noticeable difference
Those old McIntosh jacks are close together, hard to clean, and not gold plated, subject to corrosion.
My vintage McIntosh Preamp mx110z (from the 1960’s). I was in a hurry to hear it, gave them a simple cleaning, hooked it up.
Last week, disconnected, took down to the shop, used very fine Emory cloth, super fine steel wool to remove corrosion, used tight rca jack pushed repeatedly in/out, alcohol, compressor. IOW, a real cleaning inside and out of the jacks.
I figured out a trick that led to greater success: I got a length of 1/2" wide leather (could use strong cloth) to make a loop around the jack, and put a thin layer of steel wool inside the loop, pulled the loop up/down without needing room to jamb my fingers between the tightly spaced jacks.
Made a noticeable difference