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  1. Thank you very much Jazz P Bass, this one...

    Thank you very much Jazz P Bass,

    this one seems the same, being connected straight pin to pin:
    https://www.ebay.it/itm/123704270952
  2. Discontinued Yamaha AV-1 without system connector cable. How to replace it?

    Dear all,

    A friend of mine gifted me an old Yamaha AV-1 for an apartment close to the office.
    As the title of the thread says, that unis is missing the connector cable.

    Schematic is here:...
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    Well, I tried with a current limited power...

    Well, I tried with a current limited power supply, and I've found that the 3.3V power supply gives out 4.0V.
    The CPU is indeed hot, but the unit has switched on for a few minutes, then off with only...
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    Thanks Helmholtz, I will give it a try with a...

    Thanks Helmholtz, I will give it a try with a linear amplifier.
    I have a linear power supply, probably 12V, but it has a big heat sink where I can install a 7809 instead of the 7812.
    I will update...
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    So the issue could be in the two power supplies...

    So the issue could be in the two power supplies I've used, rather than in the pedal itself?
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    More on that here:...

    More on that here: https://www.diyaudio.com/forums/tubes-valves/72536-el84-amp-baby-huey-46.html
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    With batteries it works. Well, I've not tried...

    With batteries it works. Well, I've not tried with audio, but it lights up, memory calls work, on/off works, etc...
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    I've not tried batteries, because I've not...

    I've not tried batteries, because I've not enought AA.
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    Boss DD-20 internal short circuit?

    I've a Boss DD-20 (attached the service manual) that does not start up.
    When connected to a switching power supply, the power led blinks rapidly and nothing else lights up.
    Correct voltage and...
  10. Interesting thread! Thanks. If can be of any...

    Interesting thread! Thanks.
    If can be of any help, the best sounding attenuator I've ever tried is this one:

    http://www.youtube.com/watch?v=CH6AI2mAsD4
  11. Thanks g1, very informative. Any suggetsion on...

    Thanks g1, very informative.
    Any suggetsion on the variable CFB pot?
  12. Something like this one would fit, but I would...

    Something like this one would fit, but I would like to know which ones were the original.
    https://www.mouser.it/datasheet/2/358/typ_FAC-58104.pdf
  13. I don't like to have wrong fuse holders there,...

    I don't like to have wrong fuse holders there, that's why I would like to know which were the original ones. For sure I'll eliminate all the silicone that has been put there. What a mess.

    R66 has...
  14. Please take a better look to those new photos: ...

    Please take a better look to those new photos:

    Close to the FS1 label you can see the short of the leads of the fuse holders.
    On the other photo, R53 and R54 look clearly burnt.
  15. This is one of the possible conclusions, but not...

    This is one of the possible conclusions, but not the only one. My persola tests have been done on the different RC times for the supply of the screens, and I have to say that you can get quite a good...
  16. Hi all, I've found another 8008, with black...

    Hi all,

    I've found another 8008, with black front panel, that doesn't work.
    The amp has been repaired by someone and broke again two hours later, so the owner decided to trade it.
    I've traded it...
  17. Let me rephrase it better: the following filters...

    Let me rephrase it better: the following filters seems to be added just for sonic reasons, and not to avoid oscillations or issues at DC.
    - C3 and R3 make a lowpass at 4.8 kHz to dampen some...
  18. Searching something else, I've seen on another...

    Searching something else, I've seen on another forum that you said:


    Can this apply to this amp too?
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    I think they translated it uncorrectly. I'm...

    I think they translated it uncorrectly.
    I'm pretty sure the last word in the original language was 世界.

    Funny thing is that during the 60s in europe the "natural radioactivity" was definitely a...
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    Thanks Juan Manuel for sharing that: look at...

    Thanks Juan Manuel for sharing that: look at 1:23, everybody with a grain of cooking salt knows that spaghetti must be rolled anti-clockwise in the northern emisphere, to follow the natural rules of...
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    I was strongly searching a place where people...

    I was strongly searching a place where people could appreciate the value of my new business idea of directional spaghetti. Now I know. You miscredents will never know the taste of a single spaghetto...
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    Thanks The Dude!

    Thanks The Dude!
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    Thanks guys.

    Thanks guys.
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    Do you guys suggest to add "sponges" before the...

    Do you guys suggest to add "sponges" before the fans, to filter out the dust from the cooling air?
    I see pros, main one is of course is avoiding dust inside the rack, and cons, main one is that...
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    One more step: 49656

    One more step:

    49656
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    Thanks Tom and Jazz. Can you please explain me...

    Thanks Tom and Jazz.

    Can you please explain me why is needed to supply the leds with a decoupled supply?

    Just some noise while turning on and off the leds, or it is because when leds will turn...
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    Is anyone aware of the reasons why I can't use...

    Is anyone aware of the reasons why I can't use two diodes in series (or even tapping it from the +15V) to drop 1,2V instead of the 22 Ohm resistor and the 47 microfarad capacitor?
  28. How do you think to rearrange the gain pots?

    How do you think to rearrange the gain pots?
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