Can I use a step up transformer?


Hi everyone :-) I am currently using a .3mv cartridge (Dynavector 20x2) with a phono pre amp (Manley chinook) that only has a 60db output for LOMC, I am not getting the gain I would like, I feel like I am at the boundries of over loading my tube linestage (Manley Jumbo Shrimp) with the volume at 3:00 o clock position.Would this kind of a device even help fix this issue? Where does it hook up?  Assuming it would.... And If you wanted to spend under $2000 for one, can you recommend one that should work well with my system?

Thanks

Matt M
128x128mattmiller

Showing 1 response by almarg

Matt, I agree with the others that there’s nothing wrong with having to use the volume control in the upper part of its range, as long as you never find yourself wanting to turn it up higher than it can go.

Also, I looked at the specs of all of the components in your vinyl playback chain and I don’t see any way that you could overload anything at any volume setting, aside from possibly driving the amp into clipping in the unlikely event that your ears or the speakers don’t overload first.

Increasing the amount of gain that precedes the line stage from the present 60 db to say 71 db, which could be done by using a 20:1 SUT (26 db gain) into the Chinook’s 45 db MM input would probably result in your using the volume control at not much more than 12 o’clock, rather than at the 3 o’clock setting you mentioned. However it would also result in the possibility that on extremely high volume dynamic peaks on some recordings you might exceed the Jumbo Shrimp’s maximum input spec of 5 volts. (Based on the specs, overloading of the Jumbo Shrimp’s input would occur well before the Chinook would be overloaded). There’s no point to introducing that kind of marginality into your system, IMO.

Regards,
-- Al