| SE amps opinions for my second amp build needed? - Click HERE for Original Thread |
| RMS |
Hi and Merry Hollidays to everyone here!
Its been a while since I posted, my first audio build was a SE EL84 type with a 12ax7. I'm looking to do another SE but one now with a bit more wattage. Would like to see more schematics similiar to these bellow and any idears as well thanks!
Angela has this one:
http://www.angela.com/catalog/how-to/SE.EL34.html
Ace Audio I found this one the other day:
http://home.att.net/~chimeraone/aceschem.html
This schem next is a Mullard design I think came from someone here I forget who though it has a EF86 and a KT88 SE. The pic was to large to download I'll try latter to make it a smaller file size. |
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| richwalters |
Have a brouse at the <distortion in 807 poster>.....useful digression & info......the Gordon Rankin circuit should work reliably unless you want to go a different avenue.
rich: |
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| Positron |
Rich, would you give me the link to check out Rankins schematic? Want to check it over.
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RMS, saw tubebuilders design and see some improvements.
First 2.3k OPT needs to be higher, say 5k or so. 2.3k is going to give you 5% or more with a 2.3k. At one watt it will also be high.
The power output will be lower with 5k, but you could raise the B+ some if you want. |
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| fdegrove |
Hi,
| quote: | | Rich, would you give me the link to check out Rankins schematic? Want to check it over. |
Steve,
The article was published in Sound Practices, Fall issue of 1992.
I'm piecing the schematic together for Arnoldc and Burnedfingers.
Will post drawing as I move along.
RMS,
From the same Tibebuilder site, here's one I find appealling:
KT 90 SE.
Cheers,;) |
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| RMS |
Thanks all!
Afew questions though, on that ace schematic why is there those I think there .047uf 400 volt caps in its power supply, and I notice there is no choke nice savings on a low budget what are the pros and cons about that??
From the same Tibebuilder site, here's one I find appealling:
KT 90 SE.
Is that a coke in there its in a od position something I don't understand yet?
Thanks! |
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| fdegrove |
Hi,
| quote: | | Is that a coke in there its in a od position something I don't understand yet? |
It's an interstage xformer...
It performs a quadruple task, it couples into the next stage, performs impedance xformation, blocks DC, provides galvanic isolation between stages...and that's just for a 1:1 xformer...
Well designed it can also keep RF nasties at bay, etc, etc....
Don't think I'm a xformer fan, I' not. Well designed however, the benefits are manyfold...........
Cheers,;) |
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