Deep Switch Mods

[bolomule]

Anyone successfully modded the deep switch? I play humbuckers and its just too boomy. I also have a mid switch already so trying to figure out what to do with that extra hole in the chassis.

[Charlie Wilson]

What amp circuit did you build?
CW

[bolomule]

Its a 50 watt 183. Also have a 50 watt 3rd gen which has the same prob. I mainly play with the neck hum. Would like to reduce the effect with a slightly tighter low end. Just something to beef it up from normal and give another option.

[Charlie Wilson]

The thing is, the deep switch doesn’t really increase the bottom end. It filters some highs and mids to give the effect of more low end. I have not tried to play around with the circuit but I have been told that the 270k resistors set the bass response. Maybe try increasing the size of those resistors.
CW

[norburybrook]

Its a 50 watt 183. Also have a 50 watt 3rd gen which has the same prob. I mainly play with the neck hum. Would like to reduce the effect with a slightly tighter low end. Just something to beef it up from normal and give another option.

If you look at how Larry Carlton set's his amp and Robben ford too to some extent, they both have the bass tone control rolled back to 3 most times. Have you tried cutting bass this way on the tone stack?



M

[bolomule]

northburybrook, I keep the bass around 2 to 3. The switch definitely works better in Rock mode, but I like the smoothness and reduced volume of the Jazz mode.

I searched deep switch and there were something like 700 matches! Anyway found this post...gonna try some different values:

Re: Pro's, con's and changes to the deep switch?
Post by markusw » Wed Feb 15, 2012 6:30 am

To my understanding the 270k connected to the bass pot together with the 10n forms a low pass filter that is mixed with the "dry signal" at the volume pot wiper via the second 270k acting as a mixing resistor.

Decreasing the first 270k should shift the low pass to higher frequencies and thus add more mids (but also bass) to the deep switch. Decreasing the second 270k should increase the effect of the deep switch, thus adding more of the low pass filtered signal.
Increasing he 10k tail should change the slope of the low pass filter, like a treble pot on a guitar.

As I said "to my understanding"...I may be completely wrong

[Abe5150]

Do you have a Dumbleator? The two bright switches helped me but I get what your saying about the neck humbucker.

[ayan]

Its a 50 watt 183. Also have a 50 watt 3rd gen which has the same prob. I mainly play with the neck hum. Would like to reduce the effect with a slightly tighter low end. Just something to beef it up from normal and give another option.

For what it's worth, the Deep switch was featured in amps with the classic tone stack, i.e., .047uF mid cap. When Dumble adopted the Skyliner tone stack with a .01uF mid cap, the Deep switch was replaced with the Mid switch. The the Mid switch offered a potential remedy for the pronounced bottom end drop when switching between "normal" and "PAB" modes in Skyliner amps. For the Classic tone stack, the normal to PAB transition is not nearly as radical. The only company I remember offering all the switching capabilities with all tone stacks, i.e., Deep, Mid, Bright, and J/R was Two Rock. I liked the Deep switch with the Classic amps I played until 10 years ago. With the Skyliner, I found the Deep unusable... furthermore, I resisted the Skyliner tone stack itself for a long time. It was hard for me to get used to it, but eventually I did and found most other amps thin sounding. The Mid switch allows use of the normal PAB (as opposed to the "Mega Boost" PAB) while keeping the lower frequencies. However, I don't like the way it sounds in either clean or regular OD mode... So, I never use the Mid switch myself. Anyway, long observation to simply suggest that maybe the Deep is not meant to sound good with a 183 circuit.

[FUCHSAUDIO]

I use pull pots, so I kept the deep switch instead of making it MRB. I did find (although I have not applied it to amps yet), you can swing the resistors feeding the deep switch to change it's effectiveness. Higher resistor values lessen the effect while lower ones can make it extreme. By putting the to contacts normally tied together in the middle, you can add a couple of resistors to change the values and use a center off toggle. If you need an extreme effect (for using single coils but wanting to play jazz) go down to 150-K or even 120-K, and use the normal values for the lesser effect. Have fun !

[Guido van der Sluis]

For this reason I installed a 3 pos switch allowing to switch between various values on resistor at the V1B input side. So now I can switch between off/270K/560K. By the way, as you may have noticed the effect of the deep switch gets lees as you turn up the gain pot.

Hope this is of help,

Regards, Guido