Menu

Show posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Show posts Menu

Messages - mguzzo

#1
lots of good tips there. I haven't modded any of the circuit on mine yet. I did install a Celestion 8" in place of the 6.5" bulldog speaker. It fit quite well in the cabinet. My son has been using it with his string bass for small gigs (church, musical pit), the clean channel and speaker handle the string bass tone quite well in those small settings. My plan is to replace the 2030 with a 2040 and put in a larger transformer to drive a little more wattage.

what's the difference between adding a 1/4" for driving an external cabinet v. the headphone/line out jack?
#2
I have a PF10 as well, I've been thinking about a speaker mod.
Instead of going "bigger" I was going to go "better" with a Jensen 6" vintage alnico
https://www.jensentone.com/vintage_alnico/p6v

I think with a sensitivity of almost 92 dB it would really open up the capability. I haven't found any data sheet on the stock Bulldog speaker.
#3
put me on your list if you need someone to review. I have a EE degree and spend my career writing work instruction and procedures for building things like medical devices, airplane actuators, electronics assemblies, among others.
#4
i haven't chanced opening my PF10 yet to do the LED mod. I'll try your method first.
#5
I referred to a similar schematic for the Vox pathfinder 10 (TDA2030 based amp)
The tone stack output from the volume pot is coupled to the input of the amp as the master volume. There is a small bypass capacitor in parallel to ground.

There is also a mains power supply with a 30V CT transformer, full wave rectifier, and set up for +/- 13V DC for the rails.

maybe its easier to post it here and you can get ideas.