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Lets get Technical > All Things Tube All about preamp and power amp Tubes.

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Messages - MarshallJMP

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1
All PREAMP Tech Tips & Support / Re: MDRT heat
« on: Time Format »
Good point Kim !

2
All PREAMP Tech Tips & Support / Re: MDRT heat
« on: Time Format »
Mmm two issues here.One is safety, second the case acts a bit like a faraday's cage so removing the top cover could give more noise (although not much)

3
No the quad switch was specially designed for the MXC pedal.

4
Hi and welcome   :thumb-up:

5
Any midi controller with a pedal on it will work.

6
Yes that could be, now as soon as the led goes on there is no added gain anymore, it get's compressed with diodes. More gain will give more chance on getting feedback.

7
Yep without the ribbon cable the mp-1 won't fire up, that's normal.

8
Wow Herby, don't give up so easy, this can be fixed, doesn't seem to be so bad.I've seen far worse then this. Maybe we can do a skype session next week so I can help you out finding the problem.Do you have a multimeter?

9
Discussions / Re: R.I.P Malcome Young
« on: Time Format »
RIP Malcolm, you will be missed. One of my all time favorite rhythm guitar players.

10
The cap has no polarity, as for the opamp, well many people struggle with it. Even I lift a pad sometimes. Now it's good that nothing has lifted on top, so if it happends on the bottom just run some small thin jumpers.

Say if you have questions, just email me, this will go faster.

Yes you can try it out without the MDRT and SS mod, no problem.

11
What IC socket?

12
Sometimes they can get stuck and hard to get out, but I never had one that I couldn't get out. Try to rock it from left to right and see if it comes loose.

13
How about these?

http://www.ebay.com.au/itm/5pairs-or-10PCS-Transistor-MOTOROLA-ON-TO-92-MPS8099-MPS8599-MPS8099G-MPS8599G/401304959496?epid=738048176&hash=item5d6fa3ba08:g:RG4AAOSwc-tY6Fra

14
Hey  Herby if you have any questions just let me know, big or small.

15
MP1 / Re: MP-1 Ultimate 80's Tones
« on: Time Format »
The AA filter is a 2nd order low pass sallen key filter at 7.3kHz so it can make a "small" difference. But with the older delays the filter freq was much lower and there you can hear a huge difference.

What also makes a difference is that as soon you engage the rate it always starts at the lowest clock freq, so if the depth is set low it will sweep from 30-40kHz vs 50-60kHz that makes quite a difference in sound, so the chorus wil sound much deeper with mp-1's that start on 30kHz vs mp-1's that start at 50kHz.

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