2. analog
  3. 123293-1797

Newbee help- Volume low even at full preamp volume-???

Guys- my first turntable- Dr. Feickert Firebird- arm- TTW jelco- cart Charisma MC-2: Specs-
:Cartridge Weight: 12 gCartridge Body: aluminiumCantilever: sapphireStylus: super fine line contact nude diamondVertical Tracking Angle: 20 degreesCoil: pure iron crossed-coil with single crystal high purity copperOutput Voltage: 0.42 mV at 3.54 cm/sec. Internal Impedance: 14ohmsFrequency Response: 20 –25,000 Hz ± 1 dBChannel Balance: better than 0.5 dBChannel Separation: better than30 dBDynamic Compliance: 10 um/mNRecommended Loading: 100 –1,000 ohmsRecommended Tracking Force: 2.0 g ± 0.1 gTracking Ability at 315 Hz / 2 g: 80 uMRecommended Tonearm Mass: medium
Phono preamp- Rogers PA-1A
Preamp- Wyetech ruby-
Ok- I set the Rogers Phono Pre per Charisma rec.-"We would suggest you to try the 100 Ohm and 10K Ohm of the resistive selection. Capacitance is sensitive to moving magnet cartridges, but not moving coil."

I get very low volume even with the Wyetech preamp at full volume- Please help a Newbee out- What am I doing wrong??thanks gary



fluffers
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
According to the KAB gain calculator, 58 dB is optimum gain for 0.4 mV cartridge.
https://www.kabusa.com/pregain.htm

Keep in mind that fluffers Wytech Ruby preamp also has 12 dB of gain.
So if he has it connected correctly, and all tubes are up to spec, he should have PLENTY of gain with his 65 dB of gain using 12AX7's in his Rogers phono preamp, and the 12 additional dB of gain in his Wytech preamp.
kijanki's avatar
kijanki
4,410 posts
 
jmcgrogan2, thanks
fluffers OP
78 posts
 
Guys- You are the best- thanks- Yes I checked this morning- Preamp phono out into MC of Rogers Phono Pre-ground connected- Front panel turned to MC not MM-SO I Guess it must be the tubes- 
so which 12AX7 do you guys rec. me getting?
rcprince
3,061 posts
 
Wait--phono OUT from preamp?  You mean you're running the TT into the MC input of the phono stage, and the phono stage into an input of the preamp, right?
griffithds
852 posts
 
fluffers,

If you have the Preamp outs connected to your Phono Pre, the Houston, we have a problem!  
Turntable cable goes to the phono pre 'in'. The phono pre 'out' goes to the Preamp phono 'in'.  Preamp 'out' goes to the amp.  


More to discover