#183 5th Generation EL-34's (High Plate Skyline) ,Layout/Schematic
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- martin manning
- Posts: 13276
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Noticed an error on the jaysg schematic (first post in this thread)... The 0.001 bass cap (C6) should be connected to the top of the bass pot as well as to the R/J switch. The dot showing that connection is missing.
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Hitalbany wrote:A 5th generation #183 ODS with mid switch - 3 piece chassis,(wooden sides high plate no LNFB V1 Skyliner w/different script
Also a big thank you to Shad/ Quinn amps for all his help with the layout..without it it would not be possible..
Also Thanks to Jaysg for the attached Schematic
Good Luck with the builds everyone!!
WARNING!!..Before you do the build please make sure you have the latest version of the layout...Good Luck!!
Tony
The Rock/Jazz switch shows a jumper on the schematic between the two upper throws. The layout shows a jumper between a pole and the opposite throw.
Regards
Jack
- martin manning
- Posts: 13276
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
I say the schematic is correct, and we're both right!jelle wrote:Layout is correct.
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Does anyone have a excel BOM for this amp? I'm working on a build but I need some specifics...
thanks
ac.
thanks
ac.
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Thanks for doing this!!!
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
[img:214:290]http://i967.photobucket.com/albums/ae15 ... 656fda.jpg[/img]
Connection points are missing and can be confused as crossover points especially at the bass pot.
Thanks
JK
Connection points are missing and can be confused as crossover points especially at the bass pot.
Thanks
JK
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Has anyone written up a BOM for this yet?
PRS, Gibson, Fender, and Teye gitters
Two-Rock Studio Pro 22 and Emerald Pro 50
Two-Rock Studio Pro 22 and Emerald Pro 50
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
I see that one of the ac connections from the relay transformer is connected to the + from the bridge rectifier. Is this correct?
Is it also correct that the 1uf tant cap on the main board is connected to the earth from the preamp out / power amp in?. Does it get its earth connection from the jacks?.
Thanks for the layout, it helps me with my first amp that I'm building.
Is it also correct that the 1uf tant cap on the main board is connected to the earth from the preamp out / power amp in?. Does it get its earth connection from the jacks?.
Thanks for the layout, it helps me with my first amp that I'm building.
- JazzGuitarGimp
- Posts: 2355
- Joined: Mon Jul 23, 2012 4:54 pm
- Location: Northern CA
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Hi All,
I am curious about the 312K Bass and 270K Treble pots: These values are strange values to me. Were they measured in-circuit? If so, can we assume they are both 500K?
Thanks,
Lou
I am curious about the 312K Bass and 270K Treble pots: These values are strange values to me. Were they measured in-circuit? If so, can we assume they are both 500K?
Thanks,
Lou
Lou Rossi Designs
Printed Circuit Design & Layout,
and Schematic Capture
Printed Circuit Design & Layout,
and Schematic Capture
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
270K was 250K and I believe the bass pot was 500K. FWIW, at least with the CTS 30% 250K it's not uncommon to find values in the 270-275K range.JazzGuitarGimp wrote:Hi All,
I am curious about the 312K Bass and 270K Treble pots: These values are strange values to me. Were they measured in-circuit? If so, can we assume they are both 500K?
Thanks,
Lou
TM
- JazzGuitarGimp
- Posts: 2355
- Joined: Mon Jul 23, 2012 4:54 pm
- Location: Northern CA
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Thanks, TM!
Lou Rossi Designs
Printed Circuit Design & Layout,
and Schematic Capture
Printed Circuit Design & Layout,
and Schematic Capture
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Does anyone know if the OD drive and OD volume pots are the CTS 30%?
The treble pot on the layout is marked 2-35, but the OD pots are not.
The treble pot on the layout is marked 2-35, but the OD pots are not.
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
No, the OD pots like the treble are the 2-35 pot. FWIW, I've measured quite a few 2-35's and most are closer to 38-40%. Also, the same holds true for 2-35 as I mentioned above about the CTS 30%, not uncommon to find values in the 270+ range.CHIP wrote:Does anyone know if the OD drive and OD volume pots are the CTS 30%?
The treble pot on the layout is marked 2-35, but the OD pots are not.
TM
Re: #183 5th Generation ODS Skyliner. Layout/Schematic
Thanks again TM.
I never knew the OD pots were 2-35's.
I used PEC 2 watts close to the same original #183 values. I recently noticed that my OD drive pot suddenly really increases volume when the pot is at @ 2 o'clock on the rotation. Making it more difficult to balance clean and OD, for one thing.
I have some Fender 2-35's that are around 280k, so I'm going to get some Deoxit pot lube, clean them and install them in my #183 copy. Maybe I'll gain a little more control and bloom.
The amp seems like it's 85% where I want it to be, maybe this will give me that extra 15% I'm looking for.
I never knew the OD pots were 2-35's.
I used PEC 2 watts close to the same original #183 values. I recently noticed that my OD drive pot suddenly really increases volume when the pot is at @ 2 o'clock on the rotation. Making it more difficult to balance clean and OD, for one thing.
I have some Fender 2-35's that are around 280k, so I'm going to get some Deoxit pot lube, clean them and install them in my #183 copy. Maybe I'll gain a little more control and bloom.
The amp seems like it's 85% where I want it to be, maybe this will give me that extra 15% I'm looking for.