Search:

Type: Posts; User: spunko; Keyword(s):

Page 1 of 2 1 2

Search: Search took 0.02 seconds.

  1. Hello, I am really sorry for the so late reply. ...

    Hello, I am really sorry for the so late reply.

    I wasn't able to get an scope. I was going to buy locally a really old one (used but working they said), but unfortunately my country went into...
  2. I found these schematics in another thread,...

    I found these schematics in another thread, provided by Jazz P Bass.
    Mine is a new model I guess, the amp doesn't have more than 2 years.
    55266
    55267

    I found a sticker on the back of the map...
  3. Roland JC 120 UT - distorted sound from Right output fx loop

    Hello friends,

    I have now a JC 120 UT that came with almost no output, it sounded like a 1 watt amp in all the inputs (High and low, both channels). Also, when I switched the vibrato/chorus knob...
  4. I'm sorry, I was out of town again. I got a...

    I'm sorry, I was out of town again.

    I got a HDD but unfortunately my old PC did not boot up. The beeps tell me it is a faulty RAM stick, and it is the only one I have.
    So that leave me with no...
  5. Replies
    32
    Views
    5,690

    Everything's good, 9.35V in all outlets. Mine is...

    Everything's good, 9.35V in all outlets. Mine is 120VAC.

    I jumped the tap in the transformer, where the thermal fuse was connected, and added the fast blow fuse to the mains.

    What fuse would be...
  6. Replies
    32
    Views
    5,690

    Hello, I'm sorry to revive this old thread, but I...

    Hello, I'm sorry to revive this old thread, but I came across this exact same problem.
    This is a picture of the fuse. The print has faded a little but it read as follows:
    55081

    AUPO
    A4-F JET...
  7. Hello, the parts were found locally. I could...

    Hello, the parts were found locally.

    I could use two caps in series, and also buy the electric heater, like a resistor for an electric shower, but since I'm ordering some parts from ebay, I better...
  8. I'm sorry for the late repply. This is what I...

    I'm sorry for the late repply.

    This is what I found for the PC scope. I will have to order some parts from ebay.

    Found:
    - 470K
    - 470 Ohm
    - plug for the pc
    - 1N400 x2
    - metal box and a...
  9. Thank you very much for all the answers. I'm...

    Thank you very much for all the answers.
    I'm going to check all the links, and try the attenuator and the scope software this weekend, I hope.

    Quick test: No power tubes = no output // with tubes...
  10. Hello, I'm sorry I was a little busy. No...

    Hello, I'm sorry I was a little busy.



    No resistance between pin8 and chasis or other ground points.




    I used a tone generator app for iPad, set it for 1Khz and tested with my multimiter...
  11. I was trying to read the numbers in the socket, I...

    I was trying to read the numbers in the socket, I guess I'm not the best :p I should have definitely check tube by tube and write down every value.

    I get continuity between FS1 - R8 - LED1 and...
  12. Unfortunately I don't have an oscilloscope. I...

    Unfortunately I don't have an oscilloscope. I know "by ear" you can't measure power, but definitely the Twin sounds louder than the marshall.

    With the twin volume at 5 it hurts because it is so...
  13. Hello, I was out of town because of my work. This...

    Hello, I was out of town because of my work. This happens quite often. Sometimes I'm out for 2 o 3 weeks.
    Now i'm home, and want to start with this amp again.



    This amp uses 5881 tubes. I'm...
  14. Cheap Marshall JCM900 4102 "AS IS" - blow fuses, bad power tube and pots - low output

    Hello again friends. Let me start saying I love this forum, it is really fun to do all this stuff, and I really appreciate all the help you guys give.

    I got this marshall amp really cheap. The...
  15. I have installed a fast blow 20A which was the...

    I have installed a fast blow 20A which was the highest you can find here, and ordered a pack of 5 T10A.
    Do you think the fast 20A fuse will last?
    If not, I will put some heavy wire
  16. Thanks for all the answers. I've read the other...

    Thanks for all the answers.
    I've read the other thread, cool stuff, the mod seems really interesting. I'm going to try with a normal 10A fuse. The amp will be giging all night long for 3 nigths...
  17. The puff/flickering thing occurs for a nano...

    The puff/flickering thing occurs for a nano second, just when I swicth the standby ON. When playing the guitar, everything is normal. If I swicth OFF the standby no puff/flick, switch it ON again and...
  18. Iím glad I visualy inspected the amp. Besides the...

    Iím glad I visualy inspected the amp. Besides the short/arc problem in the v10 power tube socket, v6 also had the cables too damn close to each other (pins 2 and 3), and pin6 has a cold solder....
  19. Thank you for the answers. Yes it has 6.3 Vac...

    Thank you for the answers.
    Yes it has 6.3 Vac and all tubes light up. Without that fuse there is no filaments voltage.
    I will try to find the proper fuse, and will check those ground points when I...
  20. I should have posted the fuse pics in the first...

    I should have posted the fuse pics in the first post. The PCB says T10A fuse. I'm sure my fuse is a normal 8A , no slow blow. Can I use mine?
    54609

    I took some readings without the current...
  21. Fender Twin Reverb 2012 (new) - blown 10A fuse / short - arc between plate and filament 6L6

    Hello, I got this Fender Twin reverb, the PCB says 2012 but it has six months of use. It was bought new at the store.

    My friend says he was playing and suddenly the amp just went off and never...
  22. I'm sorry, I was really busy. Here are some pics...

    I'm sorry, I was really busy.
    Here are some pics of the pedal.

    The two knobs for the gain section were chopped off. Damage in the pcb traces, too many missing parts. The socktes for the batteries...
  23. Let's say the main components are good. The...

    Let's say the main components are good. The problem is at the power section and distortion circuit, with the PCB traces really bad. Can't tell if those disolved micro compomentents are resistors or...
  24. CryBaby Slash severely damaged - What to do with it? Any ideas?

    Hello friends.

    I got this CryBaby Slash signature with its PCB corroded, some of those micro resistors and caps have disolved Ņ?. The lugs/terminals of some ICs have dissolved too. PCB traces...
  25. Hello friends. An update to this thread. I...

    Hello friends.

    An update to this thread. I tried J M Fahey in my first mod and it worked really well, but I ended up mixing it with another suggestion from another forum. (If you see my first...
  26. Thank you very much. I found some leds in my...

    Thank you very much.

    I found some leds in my drawer, and I don't have the datasheet of them (red and blue), so I had to play with different resistance values to get the switches to work. The...
  27. Thank you, I've been there too. The diagram for...

    Thank you, I've been there too.
    The diagram for that footswitch won't work. I've read the Q&A, and the dealer said you have to mod that footswitch to allow a battery. Also a buyer commented that the...
  28. Hello, sorry to revive an old thread. Or is it...

    Hello, sorry to revive an old thread. Or is it better to create a new one?
    Does anyone has the diagram with the mod?
    I have a JCM 900 4501 (50 watts) and want to put leds in it.

    *Edit
    Voltages...
Results 1 to 28 of 52
Page 1 of 2 1 2