My first Rocket... Need help!

[angelodp]

Hmm... this amp should be a pretty clean machine with the volume at 9 o'clock certainly and plenty loud.

Can you post some clips.


Seen this?

http://www.youtube.com/watch?v=_lLcL13Z1FQ

[overtone]

Hmm... this amp should be a pretty clean machine with the volume at 9 o'clock certainly and plenty loud.

Can you post some clips?

+1, and I think you could get more advice with a clip demo.

Before you go changing out components:
- did you try other valves as Mark suggested?
- I don't quite understand how you are getting a slight rise in voltage from B+4 to B+5. That looks odd, is it just a typo?
- did you double check the plate resistor values and your pot tapers?

[M Fowler]

If the component values are correct and the wiring is correct and the tubes are functioning properly

Then I would start looking for cold solder joints and whether the OT is good.

Does the amp sound the same on 4 ohm verses the 8 or 16 ohm output?

There are a lot of things to consider.

Mark

[showsii]

Hmm... this amp should be a pretty clean machine with the volume at 9 o'clock certainly and plenty loud.

Can you post some clips?

+1, and I think you could get more advice with a clip demo.

Before you go changing out components:
- did you try other valves as Mark suggested?
- I don't quite understand how you are getting a slight rise in voltage from B+4 to B+5. That looks odd, is it just a typo?
- did you double check the plate resistor values and your pot tapers?

-Sound clips soon to come.

- what values are you referring to that mark suggested?

-I'll double check that but yea i think that is a typo on the b+ voltages

-volume checked out! And will check plate resistor values tonight.

Thanks!

Ian

[showsii]

If the component values are correct and the wiring is correct and the tubes are functioning properly

Then I would start looking for cold solder joints and whether the OT is good.

Does the amp sound the same on 4 ohm verses the 8 or 16 ohm output?

There are a lot of things to consider.

Mark

Assuming all components are the correct value, will I check for cold joints all over the amp or just in a specific area?

How do I check wether the OT is good?

I will definately try different ohm setting now that you mention
It.

Thanks!

Ian

[overtone]

- what values are you referring to that mark suggested?

Sorry, that was not clear, I wrote valves meaning tubes. Valves are what we British call tubes!

[M Fowler]

overtone

- did you try other valves as Mark suggested?

Overtone said valves not value

[showsii]

overtone

- did you try other valves as Mark suggested?

Overtone said valves not value

Yeah I just saw that, woops!

I checked my resistors and everything is correct. One thing I did notice is I could not get a reading on the 1meg right on the input jack. It showed 0 ohms. Any reason for this besides not knowing how to use a multimeter?

I have not tried other Tubes (valves) yet. I can though.

I will also post gut shots soon.

ALSO, I did forget to mention I install a 230v fan straight off my mains. Runs very quite and pushes just a little air. Would this have any effect on anything?

Ok, here is a sound clip. First is a progression with the volume at 9:00 and the treble and bass at noon and the cut at 5:00

As the clip goes on I turn up the volume and begin to dig in and that's when it really starts to get dirty. The highest the volume went was 11:00

I started out on the middle pickup position of my telecaster. Cab is loaded with 1 vintage 30. 57 a couple inches away right off center, recorded via Mbox2 no eq on anything. ( I don't know if the detail is necessary but it couldn't hurt right?)


Thanks everyone


Ian

[angelodp]

Thanks for the clip.... now some pics. You have a problem with this amp. It does not sound correct. I know that Mark and others can trouble shoot this far better than I can. Can we see the build.

A

[showsii]

Thanks for the clip.... now some pics. You have a problem with this amp. It does not sound correct. I know that Mark and others can trouble shoot this far better than I can. Can we see the build.

A

Afraid of that. OK here comes the pictures. Its the best I can do quality wise, Hopefully it is sufficient.

More to come..

Ian

[showsii]

Thanks for the clip.... now some pics. You have a problem with this amp. It does not sound correct. I know that Mark and others can trouble shoot this far better than I can. Can we see the build.

A

More pics

Let me know if someone wants a close up of a certain area of the amp, Ill work on borrowing a camera to get better quality.

(I went a little crazy with the filter cap glue. Also the red wire between the two resistors on the cap stack is just a jumper, I cut the leads to short)

[showsii]

Looks like my B+5 voltage is indeed higher than by B+4 voltage. This was not a typo. Maybe this will help to finding the problem!

Ian

[angelodp]

Yes, track that down and you may have a quick fix here.

[showsii]

Yes, track that down and you may have a quick fix here.

Wide angle pic... Ill try to get a clear image Tom along with a close up of the filter caps requested via Ange.

Thanks everyone

[overtone]

I had a quick gander at the pictures - the wiring of the bunch of filter caps to the board looks to make sense to me. I wonder if you got the B+4 and B+5 mixed up as they run under the board?
I can see a blue wire connecting B+4 to R6 and a red wire connecting B+5 to R4, but I cannot see how you connected the red and blue to your three blue fly wires B+3 / B+4 / B+5 at the filter cap end of the board. If you cannot see that, do a continuity check.