Hi John Curl-- I want to know your opinion!?
Advise the circuit XLR . to get the Balanced XLR output and immediately after your corrector send a signal to the XLR balanced amplifier. Thank. Sergey Moscow
how to make it simple and beautiful?
Advise the circuit XLR . to get the Balanced XLR output and immediately after your corrector send a signal to the XLR balanced amplifier. Thank. Sergey Moscow
how to make it simple and beautiful?
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HI
I collected --- there is a problem
I used Chinese parts-- ordinary
transistors are soldered to the bottom of the board
I connect a tube amplifier ----- the sound is heard only if the volume control is in a certain position If you unscrew the sound to the maximum there is no sound and to the minimum
Sound is only in a certain position on the amplifier
If you connect to the TV there is sound --- but somehow quietly
there is always a sound, it is regulated
Can someone tell me valuable advice
47k ---- need to install?
200 ohm +47 k ----- put this together?
my head denon 103
I collected --- there is a problem
I used Chinese parts-- ordinary
transistors are soldered to the bottom of the board
I connect a tube amplifier ----- the sound is heard only if the volume control is in a certain position If you unscrew the sound to the maximum there is no sound and to the minimum
Sound is only in a certain position on the amplifier
If you connect to the TV there is sound --- but somehow quietly
there is always a sound, it is regulated
Can someone tell me valuable advice
47k ---- need to install?
200 ohm +47 k ----- put this together?
my head denon 103
Attachments
Last edited:
ok! The problem was in the chip!(I removed ne5534 put ad 711)
It works great!
I removed the input tuning resistor 200 ohms! I put a 1k resistor at the input
my head Denon 103
It works great!
I removed the input tuning resistor 200 ohms! I put a 1k resistor at the input
my head Denon 103
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PCB Prototype & PCB Fabrication Manufacturer - JLCPCB
I drew on a computer - ordered at the factory here
I drew on a computer - ordered at the factory here
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You should not use a 5534 for the servo.
I believe John used the AD 711 back then ( today maybe OPA 189, or 134 )
carbon film resistors are not good either, at least use metal fim , preferably non magnetic ones .
I believe John used the AD 711 back then ( today maybe OPA 189, or 134 )
carbon film resistors are not good either, at least use metal fim , preferably non magnetic ones .
Also for yellow capacitors.
Use polypropylene (or polystryrene) MIT/ Relcap
Rel cap is John Curl’s choice.
( teflon Relcap too, but very expensive)
1% for the yellow cap in the middle (RIAA)
Use polypropylene (or polystryrene) MIT/ Relcap
Rel cap is John Curl’s choice.
( teflon Relcap too, but very expensive)
1% for the yellow cap in the middle (RIAA)
Hi, where could you source the J203 FETs from? You can replace them with current sources I guess, but maybe they can be sourced cheaper from somewhere. Thanks!
Input Jfets Idss of 16.3, is it for one device? What is the total value of parallel Idss for K170/J74 pairs at the output of MC stage in your schematic? Regulated voltage ( 19-20V) seems high for servo op-amp which is 18V rated.
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