• Item: Preamp - 1  
  • Type: 6C45 + LL1660  
  • Posted: 26 March 2014  
  • Builder: C680  
  • Country: Hong Kong  
  • Comments: 1  

6C45 / LL1660 ,Dual mono channel preamplifier

This preamplifier use single 6C45 for each channel and both channel have individual power supply.

some technical specification
- full mono block design
- each channel use single 6C45 tube. very low in Rp impedance.
- each decouple NOT use capacitor, use WTO. Lundhal LL1660 transformer
- each channel have individual power supply.. each HV have 11500uf recitifcation capacitance .
- each heater supply have 11000uf cap for filtering

very good performance , with output transformer, the background noise is hard to hear.. have very little..but very very clear. Fq response from 10Hz - 17KHz in very flat characteristic. only difficult part is need to choose the match pair of 6C45.. I take choose from 8pcs , then choose 2 of them the performance is closely same.

after 150hr warmup , the sound become more lovely. specially with LP ..

Comments

  • Francois
  • 20 September 2014 at 04:01PM
  • Extraordinary well done. Bravo ! You sell those models ?

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