Hammond S6 Chord Organ to Fender 5F11 Tremolux

[ThermionicScott]

I would think he would put resistance in series with the tubes being used. Measure the voltage drop required after the amp is up and running, calculate the resistance needed, divide that in half and put a resistor inline on either side of the heater string to keep the voltage split evenly across the tubes. Then either a pair 100 ohm resistor or pot to go to ground, or use an elevated voltage.

The PT has a center tap for the heaters, so OP can pick whether they want a humdinger/elevated heaters or not. I have yet to need it on any amp...

 

[printer2]

The PT has a center tap for the heaters, so OP can pick whether they want a humdinger/elevated heaters or not. I have yet to need it on any amp...

Sometimes useful, depends on the layout. More useful for higher gain amps though.

 

[ArcticWhite]

I have built two amps using S6 guts. I did build threads on them. A 5E3 and an 6G4A Super but with 6V6 power tubes. I think my B+ was about 350 volts. The OT is kind of small but seems fine in my builds. No issue with heater voltages. My speakers were 8 ohm Rola alnicos. I used the lower power supply as is with and updated power cord and I put a fuse by the PT. I kept the power supply in the bottom and ran longer wires up to the chassis. I did not use the Hammond power supply filtering and grounding, I grounded the B- center tap to the main ground.

I salvage the center part of the organ case and reused the 2 x 10" baffle. I kind of prefer 2 10's over a single 12 so that worked for me. I also used part the upper "chassis" and kept the power tubes and OT in the original position. I stripped out all of the wiring etc, but I left the 9 pin sockets in place and used them for the tube compliment I built. I also stripped and reused the terminal strips and boards.

The OT has a center tap on the secondaries that is grounded in the organ, but you need to lift that to make it work for guitar, otherwise it is very low volume.

I did feel a little bad stripping them, but both of the ones I got were non working and beat to crap. It will be pretty heavy and big if you do what I did.

Take Care
John

That sounds cool, John.
Could you link your build threads here? I'd love to see them.
Thanks,
Steve

 

[ArcticWhite]

I have acquired probably close to two dozen old organs over the years...all for free. The reason they are free is because nobody wants them. If there was some value in saving them as organs, there would be folks out there snatching them up. This may change sometime in the future but it has not happened yet.

Of those two dozen, I chopped one Hammond M3 to look like a Baby-B and sold a nice A100 to an organ jockey for a few hundred. The rest became organ donors.

Build away and feel no guilt.

I've scrapped about a dozen over the years.

Like you, I won't destroy a Tone Generator Hammond unless it is absolute toast.

I did the poor man's foldback mod on an M100 about 8 years back, and sold it for $150. Those have value. This foldback mod adds value, because it fixes a design flaw in the upper register. It is a challenge to do, but interesting.
http://www.dairiki.org/HammondWiki/AddingFoldbackToASpinet

 

[ThermionicScott]

Sometimes useful, depends on the layout. More useful for higher gain amps though.

Ah, good point. I've only built tweed-style amps so far. Nothing truly high-gain, although it would be fun to build a channel-switcher someday.

 

[jmp81sc]

Here you go
https://www.tdpri.com/threads/6v6-brown-super-build.1055275/
https://www.tdpri.com/threads/hammond-salvage-to-5e3.1046969/

 

[red--noise]

By chance do you still have any of the cabinet? I have an S6 that I'm keeping as an organ, but it came without the back panel that yours has (which would be great for keeping the cat out!) I'm also in the Portland area, so I've got my fingers crossed you haven't dumped it already!

 

[ArcticWhite]

By chance do you still have any of the cabinet? I have an S6 that I'm keeping as an organ, but it came without the back panel that yours has (which would be great for keeping the cat out!) I'm also in the Portland area, so I've got my fingers crossed you haven't dumped it already!

Sorry man, I cut it up for the veneer and used the grill cloth on another amp build.