Thanx for the post ,, nice idea .. just build all schematic and with switch move my signal from start of schematic or from power amp ( volume pot ) .. tell something else . How mA need for 220 secondary ?
I would not do the Phoenix but the 18 Watt Lite.
Directory Index
Layout Minimalist. Has SS diodes instead of tube rectifier.
http://rh-tech.org/public/18-Watt/18W_minimalist_layout2.pdf
Or
Directory Index
Layout Minimalist. Has SS diodes instead of tube rectifier.
http://rh-tech.org/public/18-Watt/18W_minimalist_layout2.pdf
Or
Last edited:
Thank you very much nice and small but I build the Phoenix . Now I’m searching to build a simple EQ after to 1st 12ax7 . Just a bass - middle - treble .
So I missed this, you have built two EL84 amps and now want to build another but want more power? How is the new amp going to give you more power?
Bassman (Marshall) tone stack
An externally hosted image should be here but it was not working when we last tested it.
Fender Blackface values.
I think I found it.. I copied the same EQ from Marshall JCM800.. so I remove the tone control from Phoenix and I add the EQ controls .. check if I right .
Ohh now I see .. thank you Printer2 for EQ . I have build 2 amps as well at 15 and 18 watt , I don’t need more . But I just want to make something with less gain stage to add pre amp emulator pedals … but now I’m ok with Phoenix .and I put the EQ for something different from my other amps ..
I don’t need more....
I think that is a common refrain around here. I thought the 18 Watt simpler and do real difference in output. I have started on an EL84 amp but it is on the back burner for now. Not a lot different in concept. This is only a working schematic, room for change yet.
I think that is a common refrain around here. I thought the 18 Watt simpler and do real difference in output. I have started on an EL84 amp but it is on the back burner for now. Not a lot different in concept. This is only a working schematic, room for change yet.
this is what I wanted to know, whenever for less gain I will remove the capacitors from the grid of v1 (pin: 3-8)
And something else the schematic of Phoenix say to some grounded on OT/power ground and some grounded on pre amp star ground . normally everything has to be grounded with the chassis. Why here he groups them?!?!
And something else the schematic of Phoenix say to some grounded on OT/power ground and some grounded on pre amp star ground . normally everything has to be grounded with the chassis. Why here he groups them?!?!
For testing I take a transformer with 24v + 24v output .. I put on one ac cable the 1n4007 and on the second the another 1n4007 and those 2 cables with diode put it together .. the current drop to 23.05vdc . why? As you say I use 220v+220v with couple of 1n4007 the current goes around ~300vdc .. I.e. 1.41 x 220 = 310 vdc … what I’m do wrong ?
Last edited:
Not sure what your problem is.
PLEASE call Voltge: VOLTAGE and current: CURRENT, they are NOT the same.
The power supply uses that to charge a Capacitor.
I suggest you build a project which is amply documented, say a Ceriatone or similar, including a full layout and wiring image, so you get *build* answers by looking at it.
Build it exactly as is, and only Mod needed will be adding a "direct to power amp" input jack so as to meet your needs.
Feel free to ask about it when you decided on which model to build and post images here, just in case.
Schematic is the most important part on a build, but not enough on its own unless you have built a few and can smoothly match schematic, layout drawing and actual parts on a metal chassis.
They "are" the same but do not "look" the same to human eye, you (anybody) need practice for that.
PLEASE call Voltge: VOLTAGE and current: CURRENT, they are NOT the same.
You use transformer and diodes and nothing else?
The power supply uses that to charge a Capacitor.
I suggest you build a project which is amply documented, say a Ceriatone or similar, including a full layout and wiring image, so you get *build* answers by looking at it.
Build it exactly as is, and only Mod needed will be adding a "direct to power amp" input jack so as to meet your needs.
Feel free to ask about it when you decided on which model to build and post images here, just in case.
Schematic is the most important part on a build, but not enough on its own unless you have built a few and can smoothly match schematic, layout drawing and actual parts on a metal chassis.
They "are" the same but do not "look" the same to human eye, you (anybody) need practice for that.
Sorry my mistake .. I forgot add 50uf cap .. now my testing trans increase volts right ( x 1.41 ) .. everything is fine .. thank you ..
I’m making the layout of Phoenix more clear to view . With ss rectifier add EQ controls.
Last edited:
I thought of something .. to avoid the gain of the first tube. I thought of putting a master volume. so the volume of tube rename in gain… I will have the gain control to a point where my signal does not mess up and I will have the master volume .. how does it sound to you? I made the master volume based on Marshall 1974x mod (master volume by tube depot)
That pot looks backward. It shorts-out the 12AT7 at minimum volume. Yes softer, but also grossly distorted. You may need to try it the other way.
More to the point: it is inside the loop feedback. So at first it will do "nothing". When it finally takes a bite, the sound may change significantly.
Are you just over-thinking a volume control?
More to the point: it is inside the loop feedback. So at first it will do "nothing". When it finally takes a bite, the sound may change significantly.
Are you just over-thinking a volume control?