Layout Check

[Sherman]

I have attempted a layout for the SE KT88 monoblocs I'm planning. I used TubePad and some things, such at the TXs and choke are not to scale but the idea was to organize the general layout and keep the AC away from the signal.

Comments requested.

[Sherman]

Here is the schematic.

[mark_titano]

Originally posted by Sherman
I have attempted a layout for the SE KT88 monoblocs I'm planning. I used TubePad and some things, such at the TXs and choke are not to scale but the idea was to organize the general layout and keep the AC away from the signal.

Comments requested.

Sorry for the OT...which software did you use to draw the layout?


Thankyou
Mark

[Sherman]

Originally posted by mark_titano




Sorry for the OT...which software did you use to draw the layout?


Thankyou
Mark

I used TubePad. It is free but isn't exactly a program. It consists of a bunch of pre-drawn components for both "virtual breadboarding" (as my layout above) and schematics.

Basically you just use MS Paint and the "Edit, Paste From" command to insert the components into your drawing. You then use Paint to draw the lines for wires etc. and for labeling.

Not extremely high-tech but it does help visualize the layout. Just google for "tubepad" and you should find the link.

[alejo]

I think you must to rotate 90 degrees the OPT (1628 SE) transformes to others transformers. to prevent Humm....




273BX 193H 1628SE
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[pedroskova]

I'd back down on the input cap, IIRC, max specified first cap for a 5U4G is 40uF.

[SHiFTY]

Looks fine to me, apart from the points addressed above.

Remember to ground one side of the filament winding.

[jane]

Seems to me that the grid on GN1P is not connected to earth?

[mark_titano]

Originally posted by Sherman



I used TubePad. It is free but isn't exactly a program. It consists of a bunch of pre-drawn components for both "virtual breadboarding" (as my layout above) and schematics.

Basically you just use MS Paint and the "Edit, Paste From" command to insert the components into your drawing. You then use Paint to draw the lines for wires etc. and for labeling.

Not extremely high-tech but it does help visualize the layout. Just google for "tubepad" and you should find the link.

Thankyou Sherman...not user-friendly, really...but interesting anyway

Cheers

Mark

[Sherman]

Thanks to everyone for their feedback. This gives me a good idea of how to proceed. I'm thinking of using 1/8" aluminum plate to mount the components and Corian for the base. It does appear these will be large- maybe 14"x10" each.

Originally posted by alejo
I think you must to rotate 90 degrees the OPT (1628 SE) transformes to others transformers. to prevent Humm....

I'm actually trying to decide if it would be better to turn the OPT or the PT but you are right- one of them needs to be oriented differently!

Originally posted by pedroskova
I'd back down on the input cap, IIRC, max specified first cap for a 5U4G is 40uF.

Good catch! I had written 50uF on my planning sheet and I've been going with that value. I checked a couple data sheets and you are right. I'll definitely back it off to 40uF.

Originally posted by jane
Seems to me that the grid on GN1P is not connected to earth?

I wrote 6N1P on the layout but actually used the pinout of a 6922 I believe. I'll double check that. I'm waffling between a 6N1P which is in the original schematic, a 6922 which I have in my bin, and a 6DJ8 type.