Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on January 22, 2012, 09:31:39 am
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There are two principal Turret or Eyelet Board Layout Style
the parallel rows layout
and the Hoffman Style layout
Hoffman layout use more parallel rows than the "standard" two rows style
this way the build are more elegant (and I'm sure more practical and reliable)
is there a rule to use as to convert a two rows layout in an Hoffman Style layout ?
or in order to start from scratch which are the principal character that distinguish the choice to pass to a third or fourth order of parallel row ?
Many thanks
Kagliostro
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This is my exp with building my own boards:
I want the shortiest connection possible - specially for grid wiring.
2 row turrets/eyelet sometimes requests more space/buss/ to get connections made.
The layout Mr. Hoffman provides makes possible for shorter busses.
Since I always build my own boards and chassis, I try to place components belonging to a tube on a area where board to socket wiring will be as direct and short as possible.
Terminal strips are of great help to provide secure placement of grid stopper.
AFAICT, Hoffman layouts are drop-in replacement for otherwise PCB shipped with reissued amps. Also seems to be worked out to makes it easier to service/mod.
PS: If you need help setting a layout, PM me. We can work together on a layout for your amp. Can u open .dwg files? If so, chassis/board can be scaled 1:1 on Acad.
Best Regards
Rzenc
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is there a rule to use as to convert a two rows layout in an Hoffman Style layout
No rules, just an eye for design and an ability to untangle and organize circuits
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Hi Doug
unfortunately it was what I suspected :icon_biggrin: :icon_biggrin:
nothing is as get by years of expertise
Kagliostro
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PS: If you need help setting a layout, PM me. We can work together on a layout for your amp. Can u open .dwg files? If so, chassis/board can be scaled 1:1 on Acad.
You are a stand up guy, Rzenc. :worthy1:
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Is there a specific amp that you have in mind for the Hoffman layout?
Please remember there are editable Hoffman style layouts in the SCH Library. If I knew which amp you were interested in having a layout for, then we could look at those editable Hoffman layouts?
with respect, Tubenit
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Hi Tubenit
the question was about general rules of drawing a layout with the Hoffman Style
To build something that works or something that works and has a professional look, isn't the same thing
Many Thanks for your offer of help
Kagliostro
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the question was about general rules of drawing a layout with the Hoffman Style
To build something that works or something that works and has a professional look, isn't the same thing
I don't know what this response means? Or if you were understanding what I posted?
In light of that, I thought I would simply post 5 different Hoffman style turret boards that are editable as an example. Perhaps from
looking over those, maybe you can draw out some general rules for a layout with the Hoffman Style.
with respect, Tubenit
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Great Tubenit
That is exactly what I was asking for
(http://www.el34world.com/Forum/index.php?action=dlattach;topic=13086.0;attach=28116;image)
Or if you were understanding what I posted?
Sure I misunderstand your previous reply
Thanks
Franco
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That is exactly what I was asking for
Ah, OK ..... good! I was not sure what you were wanting and am glad to know that was somewhat helpful.
Please remember that Doug has numerous Hoffman style layouts in his Library of Information (such as Bassman, AB763, AC30, Deluxe 5E3 & Plexi 50).
http://www.el34world.com/schematics.htm (http://www.el34world.com/schematics.htm)
Those, along with these editable SCH ones, should suffice in somewhat establishing a pattern or guideline on how to draw these up.
Then you can edit the "Generic Hoffman Style Turret board" that I posted and use it to create your own.
With respect, Tubenit
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Jeff is right,
The best way to learn is just look at all my layouts on the library page
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Doug I agree with you and Jeff
and confirm what I told previously
nothing is as get by years of expertise
Kagliostro
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Use the Hoffman layout and just modify it to your taste or what works better. Only thing I changed with the Hoffman was use eyelets and turrets for my plates and coupling caps so that they're over the top of each other. Saves a lot of space.
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Hi JayB
Only thing I changed with the Hoffman was use eyelets and turrets for my plates and coupling caps so that they're over the top of each other. Saves a lot of space.
if I don't understand badly you use some rows with turrets and other with eyelet, so the components mounted on the eyelet are under the components mounted on turrets
have you an example so I can understand better ?
Thanks
Kagliostro