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Load input impedance value question

60.242.21.237

In Reply to: RE: What coupling capacitors for the TRV-M300SE power amps? posted by vkung on February 10, 2012 at 08:04:05

Thanks for your reply. Would you know the parallel resistor to ground (grid leak resistor) value for the TRV-M300SE power amps? Is it 220-kohm? I want to keep clear of the Tone Factory Vitamin-Q capacitors. As I said, 1 capacitor is leaking and another 2 seem to be on the verge of exhibiting the same phenomena.

Follow Ups:

RE: Load input impedance value question - vkung 22:13:08 03/18/12 (1)
The grid leak resistor of M300SE is 120k ohm
- Thanks for getting back to me .... - XLR8OR 06:22:33 03/24/12 (0)
  Its very much appreciated. It seems the 0.47uF capacitor would be the best value to trial.
  - http://www.v-cap.com/coupling-capacitor-calculator.php (Open in New Window)
RE: Load input impedance value question - vkung 14:05:27 02/10/12 (6)
I will check the value for you. I guess your amp more than 6 years old.
If you want Vitamin-Q, please let me know
- Any update from Japan? - XLR8OR 02:37:58 03/01/12 (1)
  Have you managed to ask Junichi what the load input impedance value is for the TRV-M300SE amps? TIA.
  
  Edits: 03/01/12
  - RE: Any update from Japan? - vkung 08:11:22 03/01/12 (0)
    I will followup for you.
- Many thanks & further question - XLR8OR 14:25:53 02/10/12 (3)
  My amps are less than 18 months old purchased new in box. I have also found other minor faults with the power LED's failing and tube sockets needing to be replaced (both Chinese made). In addition, there have also been some wiring faults present.
  On a separate note, would you know if its possible to upgrade the AC mains transformers? They look identical to the ones used in the TRK-3488 kit. Any close up photos showing these transformers in further detail would be most helpful. Are they hand wound in China or Japan? Again, I have noticed a wiring fault present between the 2 power amps with a different layout of wiring posts available on the side containing the 4 large holes at the bottom (that is, to the left of the photo I have included).
  
  Edits: 02/10/12
  - RE: Many thanks & further question - vkung 15:03:53 02/10/12 (2)
    Where you bought your amp?
    All Triode PT and OPT are made in Japan. They are different types of PT.
    
    Edits: 02/10/12
    - From Junichi Yamazaki - XLR8OR 16:23:26 02/10/12 (1)
      Thanks for confirming that the AC mains power transformers and speaker output power transformers are all made in Japan. I have found that not all parts used in Triode products are made in Japan. Sure, the majority of the parts used are in fact manufactured in Japan (like Nichicon, Kiwame, Tone Factory, ALPS etc) but other components used are also made in China or Hong Kong (like tube sockets, LEDs, Swellong capacitors etc). Can you suggest any Hashimoto, Tamura or Tango OPT replacements?
      
      Edits: 02/10/12
      - RE: From Junichi Yamazaki - vkung 21:44:46 02/10/12 (0)
        
        In Reply to: RE: From Junichi Yamazaki posted by XLR8OR on February 10, 2012 at 16:23:26
        
        These OPTs cannot fit the chassis of your amp.

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