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  1. Replies
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    Have you considered contacting Barber? They...

    Have you considered contacting Barber?

    They will install it for $20.00.
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    357

    Tube lineup: 1) 6L6 x 2 1) 6SN7GT 1) 6SK7...

    Tube lineup:
    1) 6L6 x 2

    1) 6SN7GT

    1) 6SK7

    1) 6J7

    1) 5U4G
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    278

    Why mess around with Class AB? I would go with...

    Why mess around with Class AB?

    I would go with a Class D stereo amp board with a volume control....
  4. Without digging up the manual, I would suggest...

    Without digging up the manual, I would suggest that you try using the Aux Out feature.
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    It may be a 100 ohm resistor between circuit...

    It may be a 100 ohm resistor between circuit ground and chassis ground.

    That resistor being open should not 'create' a hum.

    Check each supply voltage for excess Vac ripple.

    If they are...
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    298

    This should fit:...

    This should fit: https://www.madisoundspeakerstore.com/soft-dome-tweeters-peerless-vifa/peerless-dx20bf00-08-3/4-textile-dome-tweeter-8-ohm/
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    https://www.simplyspeakers.com/replacement-speaker...

    https://www.simplyspeakers.com/replacement-speaker-tweeter-t-123.html
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    Nice video of the reconing:...

    Nice video of the reconing:...
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    157

    "This speaker delivers 300 watts of power to a...

    "This speaker delivers 300 watts of power to a 15″ neodymium Differential DriveŽ LF driver. The driver boasts a dual neodymium magnet and dual voice coil motor that efficiently delivers high output...
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    Here is a crop from the Cube 100. 56114 ...

    Here is a crop from the Cube 100.

    56114

    Super duper easy.
    A diode, a resistor & an LED to ground.
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    138

    Do you have a part#? Odd is the fact that the...

    Do you have a part#?

    Odd is the fact that the ones that I have seen used a relay.
  12. I think that the bypassed screen resistor on a...

    I think that the bypassed screen resistor on a pentode tube is purely a preamp tube concept.
  13. "How created the first amp for an electric...

    "How created the first amp for an electric guitar? "
    Copied the RCA Receiver manual?
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    643

    I have attached the Fender HR series jack...

    I have attached the Fender HR series jack switching setup.
    56063
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    Schematic: 56049

    Schematic: 56049
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    I would contact Boss with that question.

    I would contact Boss with that question.
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    Here is the schematic & board layout diagram. ...

    Here is the schematic & board layout diagram.

    56011

    It really is not that difficult to understand the drawings.
  18. Quote:"3. The connection between the pcb and the...

    Quote:"3. The connection between the pcb and the chassis is made by 2 screws in the power amp heat sink. If I try to power the circuit without this connection the hum is unbearable in both channels."...
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    Give this a read:...

    Give this a read: https://www.premierguitar.com/articles/26303-ask-amp-man-a-60s-premier-combo-gets-cleaned-up-for-dirty-work

    Premier schematics are rare.

    55998
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    1,011

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

    https://en.wikipedia.org/wiki/Reference_designator
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    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...
  22. Thread: Gibson G70

    by Jazz P Bass
    Replies
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    2,912

    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
  23. Thread: Gibson G70

    by Jazz P Bass
    Replies
    16
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    2,912

    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...
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    "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?
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    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.
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    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
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    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
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    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.
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