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RE: Which Jensen MC Step Up Transformer for Shishido LCR?

76.90.100.230

Tre'

In Reply to: RE: Which Jensen MC Step Up Transformer for Shishido LCR? posted by SuperB on August 04, 2023 at 04:18:22

I don't think the fact that the phono pre is a LCR type is relevant to the step up transformer choice.
The cartridge impedance and output voltage is what you should be focused on.
I think your question should be "Which Jensen MC Step Up Transformer for a Denon DL-103R?"
The JT-347-AXT set to 1:24 will give about 6mv output and load the cartridge with about 82 ohms. 82 ohms should not load down the 14 ohm Denon too much.
With the .25mv output and the 14ohm impedance of the Denon I don't see any of the other Jensen transformers being a good match.

Tre'

Have Fun and Enjoy the Music
"Still Working the Problem"

Edits: 08/04/23 08/04/23 08/04/23

Follow Ups:

Whether my linestage has enough gain? - SuperB 15:03:09 08/04/23 (6)
My linestage is based on the Electraprint's UltraPath circuit. My friend warned me this linestage doesn't have enough gain for phono playback

This is assuming I have the Shishido LCR phono made with Jensen JT-347-AXT. Don't you think overall gain still not good enough?
- RE: Whether my linestage has enough gain? - walge 03:07:42 08/10/23 (0)
  I can agree with a low gain.
  The ratio is 4:1 and the 6SN7 hasn't a enough mu.
  One good configuration is SRPP of 6SN7, p.e.
  Then switch the input cap to 1 uF, 10K is a low value.
  
  The for Sut I think that 1:24 and 1:20 are fine for 103R and Jensen are good stuff.
  
  About Shishido I have work a lot around this circuit with original EQ2L from Tango. The gain si around 37 dB.
  So 20 + 37 dB are just enough to give a right signal to line pre that is better if it has 20 dB.
  
  In attache the freq. answer of the ShiShido LCR, two channel
  
  Walter
- RE: Whether my linestage has enough gain? - Tre' 19:28:01 08/04/23 (0)
  This says your phono pre was meant to work with a passive line stage preamp.
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
- RE: Whether my linestage has enough gain? - Tre' 19:24:09 08/04/23 (3)
  what power amp and what speakers?
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"
  - RE: Whether my linestage has enough gain? - SuperB 07:21:37 08/05/23 (2)
    Homebrew 6550 pp Amplifier with 1.2 input sensitivity FOR 40W output power
    
    Orsefon Princess 15" Coaxial Loudspeaker that has 94db @8ohm
    - RE: Whether my linestage has enough gain? - Tre' 20:34:29 08/05/23 (1)
      You should be fine with the jensens.
      
      Tre'
      Have Fun and Enjoy the Music
      "Still Working the Problem"
      - RE: WhetherCustom 1:30 Step Up Transformer - SuperB 05:43:24 08/08/23 (0)
        
        In Reply to: RE: Whether my linestage has enough gain? posted by Tre' on August 05, 2023 at 20:34:29
        
        A company can custom wound a 1:30 MC Step up transformer for my Shishido LCR and will match well with Denon DL103R.
        
        Isvtoo much step up like 1:30 a good idea?

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