[sdiy] No more Hummond!

[Michael Ruberto]

Tim I thought for sure you would have been more thrilled with the 
wallpaper...
Although the X-66 is pretty sexy.

I'm only about to start the mods. That's not my website, I believe the 
gentlman is Martin Regener of Germany. I've been carefully studying his mods 
and inspecting the Hammond to find each and every component and so far he's 
pretty accurate. There are some sections in the text that took awhile to 
figure out due to translational losses ;)

It's a shame his tube preamp is sold out. Since I have a number of 12AU7 and 
12AT7 tubes I am looking at this as an alternative for grungy tube sound:

http://www.dogstar.dantimax.dk/tubestuf/mctube.htm

I think I can adapt it. The T524s power amp requires a 600mV signal at it's 
input. Instead of replacing the organ's preamp I can try placing the tube 
section between the preamp and the power amp with some simple buffer 
circuits to match the levels and impedence. With a small relay it will be 
easy to adapt one of the soon-to-be-useless tabs as a bypass switch for the 
tube circuit.

Well time's a wastin', I better get that soldering iron warmed up and start 
Da Pimpin'.

M. A. Ruberto

PS: After another lube job and removing the belt from the noisy scanner this 
old monster is almost silent running. I found that moving one particular 
wire harness a half an inch from it's previous route got rid of all 
remaining hum. I'll deal with the scanner after I get more info on it.


>From: "Tim Parkhurst" <tim.parkhurst at gmail.com>
>To: "Michael Ruberto" <frankentron at hotmail.com>
>CC: synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] No more Hummond!
>Date: Sun, 31 Dec 2006 20:00:20 -0800
>
>Wow, my favorite part were the mini skirts!
>
>That and the X-66. Pretty sure I liked the mini skirts better. ;-)
>
>Oh, and nice work on the mods!
>
>
>Tim (likes the mini skirts but doesn't have the legs to make one work) 
>Servo
>--
>"Imagination is more important than knowledge." - Albert Einstein
>
>
>P.S. HAPPY DIY NEW YEAR TO ALL!!!
>***************
>On 12/31/06, Michael Ruberto <frankentron at hotmail.com> wrote:
>>In your face Hammond. 5 new caps and a bypass connector for the Rhythm III
>>and the 60 cycle hum is GONE!!!
>>It was the bypass that finally eliminated the hum.
>>http://www.keyboardpartner.de/hammond/diagrams/T-500/t500_rhythm_subplug.gif
>>
>>The Rythm III unit was defective anyway and that's not a part of the organ 
>>I
>>care to fix. I have plans for it though. The individual percussion sounds
>>could be triggered from the lower manual - you thinking what I'm thinking?
>>EVIL LAUGHTER!!!!
>>
>>And with that unit gone there is enough space in the top for a single U 
>>19"
>>rackmount device like a multi-effects processor.
>>
>>Now that I have most of the really annoying faults fixed it's time to PIMP
>>my Hammond!!! e.g.
>>
>>http://www.keyboardpartner.de/hammond/t-modifications.htm
>>
>>M. A. Ruberto
>>
>>PS: HAPPY NEW YEARS!!!
>>
>>_________________________________________________________________
>>The MSN Entertainment Guide to Golden Globes is here.  Get all the scoop.
>>http://tv.msn.com/tv/globes2007/
>>
>>

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