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Hoffman Amps Forum image Author Topic: Filter cans and Hammond AO-43 chassis  (Read 1771 times)

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Offline dude

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Filter cans and Hammond AO-43 chassis
« on: March 13, 2022, 12:42:21 pm »
The original Hammond Organ AO-43 chassis has a cap can down by the preamp side. Converting this chassis to say a AA763 Deluxe would there be an issue using the same can hole near the preamp for nodes 2 and 3, running the ground to PT star and nodes to choke or power resistors near the star ground next to PT?
I had been drilling the second cap can hole next to the existing one on the AO-43 chassis for Node's B and C, pre-amp filter on the bd near the preamp. Seems like extra non-necessary work to drill the hole when there is one at the other end of the chassis? 
Edit: What’s up the best path to run the HT to the other end of chassis?
« Last Edit: March 13, 2022, 03:12:50 pm by dude »
If it ain't broke, don't fix it.

Offline bmccowan

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Re: Filter cans and Hammond AO-43 chassis
« Reply #1 on: March 13, 2022, 06:42:15 pm »
I can't think of a reason to not use that location. I would try to keep signal wires away from the HT lines, so where you run it depends on where you run the other wires.
Mac
“To my surprise, when I opened my eyes, I was the victim of a great compromise.”
John Prine

Offline Lectroid

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Re: Filter cans and Hammond AO-43 chassis
« Reply #2 on: March 14, 2022, 09:28:40 am »
dude,

My next project will be an A0-43 conversion, most likely the same Deluxe Reverb circuit.  Please check back in here and let us know how your project turns out.  I would be grateful for any heads-up as to possible pitfalls and/or opportunities.   :worthy1:
Subvert the Dominant Paradigm!
Free Beer Tomorrow!

Offline sluckey

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Re: Filter cans and Hammond AO-43 chassis
« Reply #3 on: March 14, 2022, 10:05:16 am »
Search this forum for "AO-43" by member "Toxophilite". Lot's of info about converting AO-43 to AB763.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline dude

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Re: Filter cans and Hammond AO-43 chassis
« Reply #4 on: March 14, 2022, 10:36:32 am »
http://el34world.com/Forum/index.php?topic=18265.msg186291#msg186291


Here's the link, if you're building anything with that chassis, post your build. I have converted several Fender and Marshall type layouts in that narrow chassis. I ran into several issues with that chassis and might be able to save you some headaches.  :laugh:  The biggest problem is designing the board to fit that 6" chassis. In my first attempt, I couldn't replaced the pots, no room to get pots out but now I got that down.
Using that preamp side can hole would open up a lot of space.
Yes Sluckey's Deluxe Lite is one of my favorite amps, it was another conversion in a Crate Vintage 20, 10" speaker. No reverb, B+ is low around 350v but sweetest clean, diode rectifier. 
If it ain't broke, don't fix it.

 


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