Layout Opinions

[surfsup]

Okay so I put together these two layouts, which would you go for?

(Preferred Layout In Last Post)

[David Root]

Ideally the first one, but that's a lot of real estate either way!

[tubeswell]

Wot David said

(and also why are you planning on using so many filter caps?. Surely you could manage in this circuit with 3 or 4? - and save some space - and save your other filter caps for a 2nd build)

[Jana]

I would go for the first one. If possible I would also move the controls a bit to the left (toward the input jack) to help shorten up those leads. I would also move the first preamp tube a bit left for the same reason. Maybe move the PI tube a bit left too to get it closer to its related components.

[KT66]

I like the first one better, but some information is left out. I assume that you are going to ground the v2 cathode and the PI ground reference at the star point by the input jack ? If so, then I would recommend grounding the filter caps that filter those stages at that same point or you are going to have a ground loop

[angelodp]

Why not use a couple of cap cans and free up a lot of real estate.

Ange

[davent]

I would go for the first one. If possible I would also move the controls a bit to the left (toward the input jack) to help shorten up those leads. I would also move the first preamp tube a bit left for the same reason. Maybe move the PI tube a bit left too to get it closer to its related components.

I'll second this.

Do you really need the 630v Solens with the el84's, the 400v's will save you a bit of space and some dollars as well.

dave

[surfsup]

The 300-0-300 i thought warrants the 630v caps(at least the first two). At this point i am pressing on with these caps and am using 6 because i am cloning the xits x10.

The first pair i assume is for filtering purposes where 15uF wasnt enough on its own, 450ht@10% figuring for 120mA which is the reason for the extra cap to help with smoothing. 10%is a single 22uF cap. I can put the PS stuff on the side wall like the second layout to free a little space.

KT66 i was planning to ground only the v1 stuff at input jack, everything else to the star near the PT.

Any issues with the blue rail dropping resistors 90 degrees to the tube leads like that in first one?

Jana, i was positioning the tubes to have short Plate leads, should i be more concerned with the other leads being shorter?

[overtone]

...Any issues with the blue rail dropping resistors 90 degrees to the tube leads like that in first one?

Jana, i was positioning the tubes to have short Plate leads, should i be more concerned with the other leads being shorter?

My 2cts: I do my dropping resistors like that now and have got away with it so far. They are up in the air and the leads are on the chassis.

The tubes are positioned to get the signal runs as short as possible, often point to point from the board to the tube socket eliminating leads altogether and the plate leads end up being long, if need be, but ideally everything is as short as possible!

Layout 1 makes more sense to me, layouts that are like a schematic really press my button. Good to see the filter caps directly at the stages they are serving.

[David Root]

Short grid leads are more important than short plate leads. Ideally you would want to minimize both, but that is difficult with a conventional layout.

Dumble did accomplish that with his Steel String Singer layout, where the tube is chassis mounted half an inch above the component board, which is cut out to allow immediate access. See pic.

[angelodp]

David, is there a larger version of that SSS avail.

ange

[surfsup]

overtone and everyone okay thanks. I will work on finalizing that layout. I think I will use terminal strips on the right side near the grouping of the first caps (can get them to sit on the chassis that way and fit inside). And put some 10uF 630 or 400v solens at the preamp area, where they can sit on the board and still fit in the 2inch chassis.

David, yes, hard to see but I think I get it anyway. I was trying to come up with V1 in front of the CC and mirror the RCk's and other passives, but then the cathode ground leads would be on the wrong side, etc. Then I thought "how can I put the tube in middle of the board?" and scratched that, ultimately I decided to leave it alone and have the tubes all in a row.

[David Root]

angelodp, if you have a larger one with better definition than the one I posted, please post it, as the one I posted just dissolves if you blow it up.

[M Fowler]

Does this one work for you?

Once you save it you should be able enlarge just fine.

[angelodp]

Thanks Mark, but it does fall apart.