Revisit #0183 with 5-piece chassis
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- ijedouglas
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Revisit #0183 with 5-piece chassis
After building my last amp with a 5-piece chassis and really liking the results I decided to give my #0183 the same treatment and rebuild it into a new 5-piece chassis. So far I'm loving the results. The amp was pretty good prior to the rebuild (period correct parts (for the most part) and period correct transformers) but straight away I noticed a much clearer top-end and more note definition and separation, This could well be due to slightly different lead-dress but I'm more inclined to believe the thick chassis has something to do with it. I had the same feeling from the last high-plate skyline that I did. Here are a couple of pics:
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Last edited by ijedouglas on Wed Nov 15, 2023 2:55 am, edited 2 times in total.
Ian
- erwin_ve
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Re: Revisit #0183 with 5-piece chassis
Nice Ian!
A rebuildi of this kind requires a lot of motivation I guess...
I'm curious on the thickness of the chassis, what do you think happens to the final result tech wise?
Erwin
A rebuildi of this kind requires a lot of motivation I guess...
I'm curious on the thickness of the chassis, what do you think happens to the final result tech wise?
Erwin
Re: Revisit #0183 with 5-piece chassis
Beautiful!
How did you compare the tone, before vs after?
How did you compare the tone, before vs after?
I build and repair tube amps. http://amps.monkeymatic.com
- ijedouglas
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Re: Revisit #0183 with 5-piece chassis
Thank you.
I'm not 100% certain but I think it has to do with the grounds. I know that chassis composition (steel vs aluminum) makes a big difference to the tone and I have to believe a thicker harder chassis would change the tone too. I paid particular attention to repeatedly testing the ground points and making sure that all had 0R between them so that may also contribute.
Last edited by ijedouglas on Tue Nov 14, 2023 10:06 pm, edited 1 time in total.
Ian
- ijedouglas
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Re: Revisit #0183 with 5-piece chassis
Thank you.
Incredibly scientifically ....just joking, I had a pretty good idea of what the amp sounded like in the room before the change so it may well be confirmation bias, but I certainly hear more clarity and note separation.
Ian
Re: Revisit #0183 with 5-piece chassis
01+ Looks GREAT Ian!!!
You sure do set a good example for us noobs to follow.
Metalwork is topnotch, hope you didn't let any blood out like I usually do...
The front and rear panels look really good, did you do them yourself?
You sure do set a good example for us noobs to follow.
Metalwork is topnotch, hope you didn't let any blood out like I usually do...
The front and rear panels look really good, did you do them yourself?
Glenn
I solder better than I play.
I solder better than I play.
- ijedouglas
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Re: Revisit #0183 with 5-piece chassis
Thanks Glenn. Yup, front and back panels are drilled, sprayed with Krylon Black gloss, apply vinyl decals and coat with clear gloss.
Ian
Re: Revisit #0183 with 5-piece chassis
Fantastic work Ian! As always from you, this is a reference build.
-Dan
-Dan
Re: Revisit #0183 with 5-piece chassis
very nice, i bought U profiles and cut top side Aluminium to size, hope soon i will start mine too
- ijedouglas
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- ijedouglas
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Re: Revisit #0183 with 5-piece chassis
WOW. Beautiful amp, man.
How did you construct the wood-metal side walls, and how are they connected to the rest of the chassis and with respect to chassis ground? How does the mahogany affect the tone?
How did you construct the wood-metal side walls, and how are they connected to the rest of the chassis and with respect to chassis ground? How does the mahogany affect the tone?
Just plug it in, man.
- ijedouglas
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Re: Revisit #0183 with 5-piece chassis
Thank you.
Red oak panels.
Each wood panel has 7 screws. 3 secure the side to the base and then there are 4 screws, 2 from the top and 2 from the bottom through the front and back c-channel. Extremely rigid and strong.
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Last edited by ijedouglas on Fri Nov 17, 2023 2:22 pm, edited 1 time in total.
Ian
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- ijedouglas
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