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Hello drew.spriggs, I'm a little bit late to see your posts. I also have a King Nothing so if you want to have your unit to work i can try to help you. A squeal should be easy to spot even if you just have a multimeter, make it squeal and take AC measurements after c3, c5, c6. It's the first...

You can use your multimeter (set to AC) at the XLR output, i will guess pin 1 to pin 2, XLR volume at max. If no measurement it can be that it is to be done at pin 1 to 3. And you can also do the measurement at the jack output from tip to ring on the jack. Jack's volume at max. Update ...

Hello, Rippin_85, Do you have the white noise when using the XLR output? Do you have a multimeter or oscilloscope?

If the components are correct value it good be good to check the solder joints. Can you check the capacitance with a meter? Do you have a multimeter?

You should also double check the capacitor c5, c7, c8 and the resistor R10. Some pictures of the inside of the particle accelerator can be useful.

Hello Sono, The first to do is to double check the value of the components of the tone stack.

:) Could be nice for Supersonic new version :

Right now for me i like the clean channel of the Ambassador into the Particle accelerator, going to the return of my effect loop.

Hello bluedmc777, What is your amp? You may consider to install a cut control, it is just a potentiometer and a capacitor. You will be able to set the brightness and use your Diplomat and Ambassador.

Hello highway31, For the mirage tremolo, the sound is always going through the effects (so triode, volume, tone, output buffer) and you turn on/off the tremolo. True bypass will just bypass the entire mirage tremolo.

At the input 0.1 VAC sine wave 1KHz. After the j201 : 2 VAC. After the first triode 18 VAC. After the second one 30 VAC. All the potentiometer at 12 o'clock and switches at middle positions. I tweaked my King nothing so don't worry if you don't find the exact same measurements, but you...

At first you can check the power supply. This is what I had in mine : 240V lower pin of R1, 37V for the transistor at lower pin of R3 and 31V at the higher pin. Attached the measurements points. I will ready for you an other set of measurements to help you, this time it will be signal so a...

Hello bluedmc777, From what I remember unity is gain at 9 o'clock and level at 1 o'clock when the mode is on the right side. I will do some measurement to confirm it. Do you have a multimeter? To do some measurement on your King nothing.

Hello Locrian99, Did you build the Black Eye by yourself and maybe use isolated jacks? If you can post a picture of your Black Eye (specialy around the input and output Jacks).

No offence but I will not listen your second sample. It is a technical matter so you need to put number on it. If you don't want to consider my advice to use a spectral analyzer do at least a dB measurement in your daw. When guitar level is set to -10dB what is your noise floor with and...

I did listen with headphones (actually just did it again) no hiss on your sample. You may hear it while standing in front of the cab, but it is not significant enough to be a problem. It may be improve if you wish by taking a closer look at your Particle Accelerator. For example you may not...

Hello Sono, I did listen your sound sample but didn't hear any hiss. Keep in mind that most of the time you only can hear hiss when you don't play. Any guitar sound will be stronger than the hiss. To make measurement of hiss or buzz il will use a spectre analyser (spectroid for android) i...

It's probably because you have the volume at a low setting. It is a logarithmic potentiometer so you may have only 10% output when you set it on 5. Let say you are at 2,5 on the dial, you only have 5% output, you adjust the resistor... So now you have around 2,5% output at 2,5. It's not a big...

Or use Cathodyne like the Marshall jtm1, it have lower B+, like that you have one triode in front of the phase inverter.

Hello Mike McLane, You could do the jcm800 micro power amp (from Rob's website), and simply plug a 5751 instead of the 12ax7 if you want less gain from the phase inverter.