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  • marcok's Avatar
    Yesterday, 05:26 PM
    Use 3mm. leds. ( like original nut bulbs ) If you use this type of leds (less than 20 mA ) , you must replace the 8 resistors . Don't worry , it...
    11 replies | 82 view(s)
  • marcok's Avatar
    Yesterday, 02:56 PM
    An other suggestion : you could glue a piece of white cardbord on the plastic tape diffuser . With leds heat is not a problem . For sanding leds...
    11 replies | 82 view(s)
  • marcok's Avatar
    Yesterday, 02:17 PM
    No ! Try to clean internal parts of VUs. Gently remove the top cover , eventually using a credit card as a tool Clean the cover inside /...
    11 replies | 82 view(s)
  • marcok's Avatar
    Yesterday, 01:20 PM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Important ! I tested deox on the on the finns . I don't know if there are problems with silkscreens ! Always test before in a hidden corner ! Ciao...
    21 replies | 478 view(s)
  • marcok's Avatar
    Yesterday, 12:35 PM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Thank you , Nando I suggest an other little " trick " to finish black alu . After retouching small scratches with Birchwood blackener , polish...
    21 replies | 478 view(s)
  • marcok's Avatar
    Yesterday, 11:28 AM
    Yes ! But remember to verify the Led current . Joe uses ultrabright Leds ( 20 mA ) , but generally 10 mA Leds are very popular . In this case...
    11 replies | 82 view(s)
  • marcok's Avatar
    Yesterday, 11:03 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    It works and the sound is great by definition ! Since my father doesn't want to sell PL 700 and he would give to my brother , I need a suggestion...
    21 replies | 478 view(s)
  • marcok's Avatar
    Yesterday, 10:46 AM
    Correct ! Ciao Marco
    24 replies | 488 view(s)
  • marcok's Avatar
    Yesterday, 10:42 AM
    http://forums.phxaudiotape.com/showthread.php/6890-Improving-Pl-400-light-led-board-kit It's a simple way to obtain a light diffuser . Ciao Marco
    11 replies | 82 view(s)
  • marcok's Avatar
    04-19-2018, 03:36 PM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Thank you ! But many thanks to my hi fi guru for electrical repair and to his son in law for polishing handles and knobs . Curiosities found...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-19-2018, 02:58 PM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Just finished ! Now I have only to clean the finns . The unit is already at my father's home and tomorrow I will connect it to Allison One . Now...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-18-2018, 05:49 PM
    No, it's the mechanical couping that makes the total balance . You move the 2 pots at the same time .Move the shaft of the joystick in...
    24 replies | 488 view(s)
  • marcok's Avatar
    04-18-2018, 01:16 PM
    As you can see the shaft pots are mechanically connected via a blade with a slot ; so when you move the joystick you can obtain all balance...
    24 replies | 488 view(s)
  • marcok's Avatar
    04-18-2018, 12:32 PM
    http://thecarversite.com/manuals/mandir/Phase%20Linear%204000%20service%20manual.pdf On page 9 you'll find the interconnection diagram .( bottom...
    24 replies | 488 view(s)
  • marcok's Avatar
    04-16-2018, 02:43 PM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Just finished to restore front panel : - removed little scratches on alu front panel with steel wool # 0000 ( generally used to restore old...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-13-2018, 02:25 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    The son in law of my hifi guru works in a company that works alu and so.... After I will add dots ( decals ) on the knobs , because this type has...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-12-2018, 04:54 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Here are the handles and the knobs polished by the son in law of my hifi guru. Ciao Marco
    21 replies | 478 view(s)
  • marcok's Avatar
    04-10-2018, 01:12 PM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    I don't know how they measure the delay between two cars in case of safety car . There is a sensor on the front wheel ( I don't remenber if left or...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-10-2018, 02:11 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Simply ugly .The name of this rollbar is Halo .The F1 circus is an insane world . I hope now the new American owners of the Circus will change the...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-09-2018, 09:26 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Thank you Ed . Infact I and my hifi guru were surprised to find a 10A fuse . It was only a consideration . Any way the story is always the...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-09-2018, 09:20 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    Possible , because everything is possible , but I know the history of this unit . 40 years ago my hifi guru sold it to the previous owner factory...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-09-2018, 08:11 AM
    marcok replied to a thread My PL700B by Marco in Amps and Preamps
    I have some questions about PL 700B transistors , because after a more in depth diagnosis these transistor are K.O. (one channel only ) - 2N 1304...
    21 replies | 478 view(s)
  • marcok's Avatar
    04-08-2018, 08:34 AM
    Here are the first pics . Work in in progress . Ciao Marco
    21 replies | 478 view(s)
  • marcok's Avatar
    04-07-2018, 03:29 PM
    marcok replied to a thread OPPO UDP-203 in Digital Sources
    My is experience is : - it's hard to appreciate the difference between HD and Full Hd with my 40" Sony ( better to say Samsung ) Distance is...
    29 replies | 3441 view(s)
  • marcok's Avatar
    04-07-2018, 07:18 AM
    marcok replied to a thread OPPO UDP-203 in Digital Sources
    Two questions , guys : -1) Can you appreciate the difference between Full Hd and 4K Uhd ? -2) Is 4K HDR an other standard ? Is there a sort of...
    29 replies | 3441 view(s)
  • marcok's Avatar
    04-06-2018, 12:31 PM
    Perry, Calman 46 quoted " this is my first PL 4000 " so I wrote soon : Replace all rear connectors ! It' s well known that they are a plague . I...
    24 replies | 488 view(s)
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About marcok

Basic Information

Age
61
About marcok
Biography:
I am an electronic engineer and I was in involved in
GSM and UMTS systems .
I and my father (87 ) are Bob Carver's fans .
I have a pair of AR9 power by Carver amp and preamp , etc.
and my father a pair of Infininty RSiiB powered by
PL 4000 a Pl 400 , etc.
Ciao
Marco
Location:
Milan Italy
Interests:
Hifi and model railways
Occupation:
Pre retired
Tagline:
I'm very curious about any tech item

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