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In Reply to: RE: Reissue Quad preamp question... posted by Eli Duttman on February 27, 2017 at 19:30:24
Thanks, Eli, unfortunately that is not an option as it is not mine and I doubt the owner will want to wholesale change the preamp and destroy any "value". It really is a POS, Chinese-made hunk of crap that is travesty to the name of Quad. I have yet to see a review of the preamp, so I don't know if this is SOP for the phono stage or if there is something wrong with the set.
Follow Ups:
Can't he just used an external phono stage into an auxiliary input without modification?
Dave
Yes, and he has done so, but I am guessing he wants to use the built-in since he paid for it! The big question is whether the built-in phono stage is operating correctly or if it is not, I don't know anything about this unit so its hard to evaluate its phono stage performance and let him know his options. Thanks!
You could check the curve with a revers RIAA equalizer, signal generator and a scope. I suspect you already knew that!
Dave
Thanks, Dave, I was thinking about doing that but I don't have a reverse RIAA sig gen, any ideas where I would get one?
Hagerman makes on and it cost $49. See link.
Dave
Getting a schematic, one way or another, is essential.
The owner is worried about value, but it has very little, lacking a decent phono section. :> (( Chinese guano!
What opamp IC(s) are in the "box"? Please provide the soldered in sub-mini tube type. A look at a data sheet might be informative.
Eli D.
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