hammond bricolage page
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various hammond organ projects.


because i  play hammond organ, i have always to deal with these monsters. so i share my experience,pain and other infos here.

i play the  a C3/leslie 122,

for gigs i use a T200 heavy mod with a 760er leslie
and if transport is a problem  a XK-3 with either a 760er leslie or a Farfisa FR-40 tube amp.
and when i have to use public transport to go to the gig  viscount d9 expander & a fatar studio49 plus a homebrew leslie....



important tools
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b&k700 tube tester .very usefull.
--->picture.
------>user manual of the b&k700



the "motion-flo"  portable leslie...
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sometimes when space&weight is a problem i use a viscount d9 expander & a fatar studio49 keyboard which sounds
acceptable with a 760er or 122er leslie.
this summer i had an openair gig. no van or station car  available to transport my 760er.
so i had to go by public transport. but how to bring my equipement  into public train and bus, alone???
the day before i decided to build a small portable unit.
i had a rotor from a strange italian leslie clone. i went to the "diy"-marked cut some wood and put together that ugly thing.
cheap, quick&dirty. but sounds definitely better than an electronic simulation. i will change the rotor to a original leslie rotor
as soon as i can get one.

the unit is 55x40cm and approx. 25cm thick. approx 12 kg weight
speakers are 4inch mids, 2 pcs and a 8ohms horn driver.
check out the pictures...
---> motion-flo1
---> motion-flo2
as amp i am still looking for a good solution. i think i will use a 60W amp with a tube pre.at the gig i used a bassman top from the band
 playing after us. so that sounded ok.


the T-200 portable project...
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how small can a t-200 organ be...not a beauty but comes close to the term: portable

the source was a totally f..ed up t200. which was used on stage for many years. almost all of the keys where broken,steady tones because of dentrides
and excessive hum made this t200 unplayable. so together with the owner pesche, i decided to take appart and to build into a smallest possible case.
light enough to carry by two small guys like me.

some impressions:
-->t200 as is in quite bad shape...this is the source plus an ao-29 from ebay
-->peter the pround owner and assistant is ready to franken that beast
-->after a few minutes of fun.. of fun we brought it to the essentials..
-->some parts for the new organ laying ready to reuse.the switch panel i did not used...
-->on the test bench all connected and working..i played first the chop
-->t200port1 one of the gigs with old protoversion with 5mm wood. not very stable. but with ao-29
the main problem was the volume pedal.

after this first stage of experiments i changed the case to more solid wood. also the ao-29 amplifier i attached as a preamp i
disconnecteed at the moment. i used again a few of  the original t100 modules.
at the moment i use the following setup:
- upper busbar amp. modified. as suggested by www.tonewheel.de , carsten meyer mods.
- lower busbar  amp as suggested by www.tonewheel.de , carsten meyer mods.
- recovery amp . changed transistors to BC550/560 low noise
- percussion board. heavy modifications. only 2nd/3th percussion kind of fast speed. percussion presets
are on the right side on the first 2 switches.
-a selfmade 24V powersupply.
the output is to a jack connector. also i left the multipin connector to attach alternatively the AO-29 tube preamp in an additional box.

played trough a 122 tube leslie the sound is pretty good.also i like the percussion sounds now.

work to do:
- adding vibrato. therefore i need a few signal relais to switch the different vibrato pads.
- rewiring for ao-29 use

the C-3 fix and mod project
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one day a incredible smell, followed of thick smoke came out of my wonderfull c-3.
both motors wherere totally burned.so i had to change. first i wanted to rewind.someday i will do. but
for a quick solution i found both motors on ebay.

---->here is a special page with the pictures of the mechanical belt driven 50 to 60 hz conversion...very noisy unreliable and ugly....


my selfmade 50/60 hz converter.quarz stable ,low cost and save. motor runs on 80 volts instead of 115.
at the moment i use a converter from germany also nicely made. just during start up 2 resistors start to smoke.....


various hammond documents...
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here some stuff people asked for....
maybe never complete.ugly scans...let me know if you need more.or different.
hammond advertisement from 1962 scans.not complete yet but i put more and more there are 26 pages...
-->pricelist from 1.1.1962. prices are in swissfrancs. 1 us$ was sfr 4.30 at that time.
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last modified: 23.06.2006