Search:

Type: Posts; User: Jazz P Bass; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.07 seconds.

  1. Replies
    10
    Views
    384

    https://en.wikipedia.org/wiki/Reference_designator

    https://en.wikipedia.org/wiki/Reference_designator
  2. Replies
    16
    Views
    641

    As to the issue of pulling Vdc to power the fan,...

    As to the issue of pulling Vdc to power the fan, it really does depend on the power supply.
    I had a PRO Audio power amp (2 in fact) in that had a 7mv hum on the outputs.
    It went away when I...
  3. Thread: Gibson G70

    by Jazz P Bass
    Replies
    16
    Views
    2,828

    Here is the schematic with the correct...

    Here is the schematic with the correct orientation of Q6. (it is a NPN transistor)

    Edit: The LTP (Q3 & Q4) where drawn as PNPs when in fact they are NPN transistors.

    55935
  4. Thread: Gibson G70

    by Jazz P Bass
    Replies
    16
    Views
    2,828

    Thank you for the schematic J M Fayhey!!! I...

    Thank you for the schematic J M Fayhey!!!
    I could not find this oddball version anywhere.
    Kudos to MEF.

    I got one of these jewels in with the MJE1102/ 1092 transistors installed.
    Of coarse they...
  5. Replies
    12
    Views
    310

    "Black Face" a Silverface amp????? WTH is that...

    "Black Face" a Silverface amp?????

    WTH is that supposed to mean?

    What, remove all of that gadly wire?
  6. Replies
    10
    Views
    253

    I found a few pics online. 55921 55922 55923...

    I found a few pics online.

    55921
    55922
    55923

    The third pic shows the amp connector.
    It appears that the lower pin is larger than the other two.
    That is going to be a tough one to find.
  7. Replies
    14
    Views
    202

    Here is the power amp schematic of the Power 10....

    Here is the power amp schematic of the Power 10.
    There is indeed a zener across a capacitor.
    16V / 1/2 watt.
    55893

    And the complete schematic: 55894
  8. Replies
    14
    Views
    202

    What do the two pads connect to? The Power 10...

    What do the two pads connect to?

    The Power 10 shows a 'D5" being a 12 V zener diode.

    55885
  9. Replies
    5
    Views
    193

    Looking at the schematic I notice there are a...

    Looking at the schematic I notice there are a number of 0.1uf bypass capacitors on the IC power rails (C42-C45).
    One or more may have gone short.
  10. Replies
    2
    Views
    242

    Try contacting them:...

    Try contacting them: https://www.altoproaudio.com/contact
  11. Replies
    2
    Views
    128

    Here is the SM: 55866

    Here is the SM: 55866
  12. The bottom half of the output is being cut off....

    The bottom half of the output is being cut off.
    If you look at your voltages you will see a lot of Minus dc measurements.
    That is hint.

    That said, solid state amps can be a real bear to repair....
  13. Yup. That is how it is supposed to work for this...

    Yup.
    That is how it is supposed to work for this test.
    I was trying to determine, by removing Q1, if the issue was in the switching voltage.
  14. Replies
    41
    Views
    950

    Not too sure why you localizing on the DeOxit....

    Not too sure why you localizing on the DeOxit.
    Again.
    MSDS: Health Hazard: 1
    Skin Exposure: may cause Dermatitis.
    Where thin gloves.

    I would be more worried about the lead in the solder.
  15. Replies
    41
    Views
    950

    How safe is it? The MSDS rates the Health hazard...

    How safe is it?
    The MSDS rates the Health hazard as 1.
    Other than the 'trade secret ingredients', the only issue that I see is the Naphtha.
  16. Replies
    9
    Views
    209

    Here is the TV-120 schematic. 55853 It may help.

    Here is the TV-120 schematic.
    55853
    It may help.
  17. Q1 mutes the clean channel when On. If you...

    Q1 mutes the clean channel when On.
    If you remove it, the switch position should not influence that channel.
    There should no longer be any connection to the switch voltage.
    So how can it make the...
  18. "Removing the Q1 the amp stays on clean,...

    "Removing the Q1 the amp stays on clean, regardless the position of the switch. When the switch is out (clean selected) the hum is present, as showed in the video. But when the switch is in (drive...
  19. Replies
    1
    Views
    145

    Nice catch!

    Nice catch!
  20. Replies
    41
    Views
    950

    Chuck. I had one of those newer tower self...

    Chuck. I had one of those newer tower self powered speaker thingies in with 'crackly' controls.
    Can't seem to remember the brand.
    Tried DeOxit.
    Nope.
    Called the manufacturer and he said 'believe...
  21. Replies
    41
    Views
    950

    Just received the Caig Deoxit. Yay! As...

    Just received the Caig Deoxit.
    Yay!
    As advertised, they are the 'old' can.
  22. Replies
    17
    Views
    552

    Here it is in pdf format: 55805

    Here it is in pdf format: 55805
  23. Be aware that U6 is in the feedback path of the...

    Be aware that U6 is in the feedback path of the output. (pin #6).

    Also the - speaker connection should not be considered as at ground potential.
    There are those 2 .22 ohm resistors in there...
  24. Replies
    18
    Views
    2,180

    Here is a schematic of the WM10 with discrete...

    Here is a schematic of the WM10 with discrete output devices.
    55780

    Not too sure about "but power FETS for the output." as this schematic shows bjt outputs.
  25. Replies
    41
    Views
    950

    I don't know, it says "CAIG D5S-6-LMH DeoxIT...

    I don't know, it says "CAIG D5S-6-LMH DeoxIT Spray 5 oz. Original Can".
    I will advise when I receive it (I bought 2)
  26. Nice find!

    Nice find!
  27. Are you certain that the Intensity Pull switch is...

    Are you certain that the Intensity Pull switch is stock?
    That sounds to me like a Cesar Diaz mod: Pulling the switch disconnects the vibrato circuit (with a 'pop')

    The Volume pull switch...
  28. I would remove Q1 jfet and see what the amp does....

    I would remove Q1 jfet and see what the amp does.

    Of coarse the Clean channel will always be On.
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4