Nakamichi CA-7A Preamp

@moose89 

The CA-7A has two torrodial transformers, so one would think that they're for left and right channels respectively.  They're not. One transformer is for line inputs and the other for phono; each transformer has separate windings for left/right channel.

There's trim pots to adjust MM, MC and line inputs which should be done periodically or after shipping.

Yes, the buttons are very fragile (use remote whenever possible); I've broken two but glued them back on so they're all there.

This pre will easily reveal the weakest links in your system, but when you've addressed them all the rewards are sublime.

@uncleang 

im impressed! You know your stuff! 
 

if I hadn’t given (4) banana boxes of vinyl to the thrift store, I’d buy a turntable just to hear that phono transformer. 
 

for right now, I rarely listen outside of streaming and Bluetooth through a Node v3… including TV. I shut off the use of my Western Electric 300 B tubes on my SET amp, for ballgames. ( trying to save tube life… I wish I knew at my age of 70, how many years of life they had, using them 4-6 hours at night only… any idea?)

yeah the making of the NAK is amazing  I got interested when I saw the Sky Hi Fi video on YouTube  

 I shut off the use of my Western Electric 300 B tubes on my SET amp, for ballgames. ( trying to save tube life… I wish I knew at my age of 70, how many years of life they had, using them 4-6 hours at night only… any idea?)

yeah the making of the NAK is amazing  I got interested when I saw the Sky Hi Fi video on YouTube  

Those tubes might outlive us... I'm 74.

@uncleang  nice!!!!