MC75 Monoblocks, are these original parts?

[ogodei]

Hi:

I acquired two MC75 monoblocks a while back. Serial numbers indicate they were made in 69 or early 70.

Looks like the capacitor cans were replaced in January of 77. I'd like to know if the capacitors on the main board are the originals or were replaced at the same time. I'm used to seeing more bumble bee caps in my other McIntosh tube amps but those are older. I'm wondering if the Sprague black beauties were the standard issue for this amp by 1969 ?

Any insight would be appreciated

Thanks

 

[jkaley]

Those are stock. Terry Dewick is a fan of the black beauties, so I'll go along with that. BTW, those cap cans may be stock too. 235-6830 = Mid 1968 manufacture.

 

[SaturationPt]

Agreed, looks all stock. My MC240 is all "black beauty" also, but my MC75s have a mix of those and "bumblebees".

 

[ogodei]

The amps were advertised to me as 'all stock' but you know advertising.

The cans look original but someone took the time to write '31-10-77' on each of them. Possibly they were repacked? Tested?

 

[Pio1980]

The smaller elyticaps may be replacements. The red letter black 160P caps are supposed to be durable.