Yes that is very close, everything is there. A few less components in some places and some value changes but other than that.
If your interested I can edit the schem and send back?
15W DC30/Rocket Type Amp
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Re: 15W DC30/Rocket Type Amp
Last edited by ChrisM on Fri Sep 10, 2010 1:33 pm, edited 1 time in total.
Re: 15W DC30/Rocket Type Amp
ChrisM,
If you want you can delete your email out of your post. I have it written down & will email you the ExpressSCH schematic so you can edit and post it back on the forum.
With respect, 10thtx
If you want you can delete your email out of your post. I have it written down & will email you the ExpressSCH schematic so you can edit and post it back on the forum.
With respect, 10thtx
Re: 15W DC30/Rocket Type Amp
Email and schematic sent to you.
With respect, 10thtx
With respect, 10thtx
Re: 15W DC30/Rocket Type Amp
Look a few posts below for CORRECTED schematic.
With respect, 10thtx
With respect, 10thtx
Last edited by 10thTx on Sun Sep 12, 2010 11:38 am, edited 1 time in total.
Re: 15W DC30/Rocket Type Amp
My novice eyes like this design a lot. Would it be a big deal to hang the input of the ef86 on the input of the 12ax7 v1a?...and they would share the same input...and the seperate volumes would make them "mixable"?
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Re: 15W DC30/Rocket Type Amp
I think the parallel/cascade is wired wrong. The upper section of the switch that controls the plate of the second triode should be drawn in the other position, so that when the cathode is connected to it's separate cap/resistor, the plate is connected to it's own plate resistor.
As is the bottom two switch sections show cascade mode while the upper section is in parallel mode.
As is the bottom two switch sections show cascade mode while the upper section is in parallel mode.
Re: 15W DC30/Rocket Type Amp
THANKS for the catch.
Here is the corrected schematic. Continue to look for errors and also note that the B+ rail may NOT be what Chris M is using with his amp.
With respect, 10thtx
Here is the corrected schematic. Continue to look for errors and also note that the B+ rail may NOT be what Chris M is using with his amp.
With respect, 10thtx
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Re: 15W DC30/Rocket Type Amp
PSU is like this...
After recto there is 32mF filtering then either 1K5 resistor or choke, after this 32mF filtering.
After that it's just like a Matchless PS. Five 22K resistors all coming off the same node (so all in "parallel") going to their respective nodes. O and 22mF filtering on all five of those nodes.
Also on the cascade triode the cap in parallel to the plate resistor is 2.2nF, 2200pF, 0.0022uF not 2.2uF, my bad.
I also have a MV. It's just a 1M push pull pot wired as a rheostat from one side of the PI output to the other. The switch just disconnects one side, therefore taking the MV out.
After recto there is 32mF filtering then either 1K5 resistor or choke, after this 32mF filtering.
After that it's just like a Matchless PS. Five 22K resistors all coming off the same node (so all in "parallel") going to their respective nodes. O and 22mF filtering on all five of those nodes.
Also on the cascade triode the cap in parallel to the plate resistor is 2.2nF, 2200pF, 0.0022uF not 2.2uF, my bad.
I also have a MV. It's just a 1M push pull pot wired as a rheostat from one side of the PI output to the other. The switch just disconnects one side, therefore taking the MV out.