swegyptian Posted April 8, 2020 Author Share Posted April 8, 2020 It sounds like you are familiar with these, and I'm guessing you might be right about the bass still being rolled off, I tend to turn it up on my preamp to compensate a bit, and that would explain why. I wonder if this is a simple thing to change... Quote Link to comment Share on other sites More sharing options...
Marvin Palmer Posted April 12, 2020 Share Posted April 12, 2020 HI Dave- I was waiting for MC40 Pic's. I thought you would attach them and email. I just was reading your thread and you wanted to phone txt? That is fine. My Phone is 1-671-687-0884. Standard state to state rates apply (whatever those are, I txt my mom in Michigan all the time, never noticed any phone charges). Best Regards, Marvin Palmer Quote Link to comment Share on other sites More sharing options...
sputnik Posted April 12, 2020 Share Posted April 12, 2020 On 3/23/2020 at 11:53 AM, swegyptian said: Will trade for Nikon camera equipment? What are you looking for, Nikon-wise? Quote Link to comment Share on other sites More sharing options...
Marvin Palmer Posted April 15, 2020 Share Posted April 15, 2020 On 4/9/2020 at 6:39 AM, swegyptian said: It sounds like you are familiar with these, and I'm guessing you might be right about the bass still being rolled off, I tend to turn it up on my preamp to compensate a bit, and that would explain why. I wonder if this is a simple thing to change... My understanding G-S were for hearing testing medical devices. Because the G-S units were for hearing testing I would think they were very linear amplifiers (no roll off). A seller in Michigan just sold a single G-S for $800.00, he posted the G-S schematics, there were quite a few changes to the standard MC40. One addition was a "VU metering" circuit for the hearing devices. I spoke to the gentlemen, i almost purchased it. But finding another matching G-S unit would be difficult. Mine were NOT G-S units. They were special order matched pair for someone. In mine the only electrical difference from standard MC40 was the 6db low end roll off. Mine had gray painted transformers, no tube cover screen, and no "McIntosh 40" on sides. All other labeling was standard MC40 (No G-S label ). regards, Marvin Quote Link to comment Share on other sites More sharing options...
Marvin Palmer Posted April 15, 2020 Share Posted April 15, 2020 4 hours ago, Marvin Palmer said: My understanding G-S were for hearing testing medical devices. Because the G-S units were for hearing testing I would think they were very linear amplifiers (no roll off). A seller in Michigan just sold a single G-S for $800.00, he posted the G-S schematics, there were quite a few changes to the standard MC40. One addition was a "VU metering" circuit for the hearing devices. I spoke to the gentlemen, i almost purchased it. But finding another matching G-S unit would be difficult. Mine were NOT G-S units. They were special order matched pair for someone. In mine the only electrical difference from standard MC40 was the 6db low end roll off. Mine had gray painted transformers, no tube cover screen, and no "McIntosh 40" on sides. All other labeling was standard MC40 (No G-S label ). regards, Marvin You can see that the front of these are not G-S. it does not have the second control for the VU meter. These are serial # 534 & 535. Probably most rare and pristine MC-30's in existence. Like i stated. I thought they were restored. It was buyer in Switzerland who told me that they were original. Then as i inspected wiring i found they were in fact factory and brand new never used. regards, Marvin Quote Link to comment Share on other sites More sharing options...
Marvin Palmer Posted April 15, 2020 Share Posted April 15, 2020 opps, ment MC40's....hahaha Quote Link to comment Share on other sites More sharing options...
swegyptian Posted April 18, 2020 Author Share Posted April 18, 2020 These have been sold locally, thanks all. 1 Quote Link to comment Share on other sites More sharing options...
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