Next Build: Modded Blackface Vibrochamp

[matoni]

I was also thinking of maybe using this mojotone transformer, but it is a bit more expensive

[matoni]

I was thinking this type of pt https://www.amplifiedparts.com/products ... nder-120-v. How do I substitute a diode rectifier in for this. If you scroll down to the description you can see the specific model number for the Vibro champ. Thanks again for your help.

https://www.hammfg.com/files/parts/pdf/290AX.pdf

Put tape on the ends of both yellow wires. Put tape on the ends of both red/wht wires. Tuck these four wires out of the way. They are not used.

Connect the red/yel lead to ground. Connect one red lead to the anode of a 1N4007 diode. Connect the other red lead to the anode of a second 1N4007 diode. Twist the two diode cathode leads together and connect to the first filter cap. I’m

Thanks so much for this. This is all I need to start making my board.

[matoni]

Does anyone have a good eagle library for building amp PCBs? I just sat down to start working on it, and I am just realizing that I only have pedal libraries. These won't work because I want to be able to put the large orange drop capacitors and the laying down electrolytic capactors acting as drain caps off of the tubes. If anyone has a good library, that would be much apreciated. Otherwise, I think I am going to do an eyelet board, as DIYLC seems simple-ish to use. Thanks so much in advance for your help!!

[pdf64]

… I can use a tube rectifier, but I like the quick reaction times of a diode rectifier better. …

What amps have you used for you to reach that conclusion?
It may not be relevant to a class A single ended amp.

[sluckey]

Better to use four 1N4007 diodes. Like this...

[Stevem]

My comment on the high current drive into the pan was by far not in regards to how much reverb depth you get out of such a circuit, but the better copy of what your putting into it coming out to your ears.

In poorly driven circuits the lows and the highs are rolled off and to my ears I get mud and the reverb itself gets more intense on the louder parts of your notes or what your playing, in other words the reverb being applied is not even.

If you like like the effect of hearing your playing like it was coming from the next room and with the door closed, then go for the cheaper way.

[matoni]

… I can use a tube rectifier, but I like the quick reaction times of a diode rectifier better. …

What amps have you used for you to reach that conclusion?
It may not be relevant to a class A single ended amp.

I have built a jm two rock sig, and the amp is much faster than my deluxe reverb. Plus, getting 4 diodes Is much cheaper than getting a 30 dollar tube

[pdf64]

… I have built a jm two rock sig, and the amp is much faster than my deluxe reverb. …

You’re kinda using your experience with apples and oranges when trying to choose a peach.

[matoni]

Oh I have no idea about the difference between types of amps. If using a diode rectifier is a problem, please let me know. Otherwise, I’m going to try and use one. Maybe you could explain the pros and cons between diode rectifiers and tube rectifiers in aa type Amps? That would me much appreciated. Thanks!!

[pdf64]

The only real issue here is that your (solid state) rectified HT voltage will probably be somewhat too high for the intended 6V6 operating point.

[sluckey]

The only real issue here is that your (solid state) rectified HT voltage will probably be somewhat too high for the intended 6V6 operating point.

Easy to fix with that Hammond 290AX PT. Just use the red/wht wires instead of the red wires.

[matoni]

So which type rectifier would you guys recommend using. I’m fine with using a tube rectifier, whatever makes the amp operate best.

[sluckey]

Toss a coin. Heads, I win. Tails, you lose.

[matoni]

I think I’m gonna use a tube rectifier so it operates more like the original. I didn’t know there was less of a loss in voltage in a diode rectifier. Thanks for all your help so far. I’m waiting for Ryan Colgan to write me back about PCB design, as I really like the design for his PCB. If anyone has a good eagle library, let me know and I can get started!! Thanks so much again for all your help so far. I’ll keep everyone updated.

[pdf64]

If using the 290AX PT, sluckey’s plan would work fine (ie solid state rectification with the lower voltage winding taps).
If a PT with higher voltage was used, then it may work out better to use a 5Y3 rectifier.