HAMMOND M-100 need help!

Re: HAMMOND M-100 need help!

Alright yall I'm going to start another forum so I might be able to get more help with the whole external speaker thing, but thanks a lot for all the help on the diagnosis and for walking me through the busbar job.

Re: HAMMOND M-100 need help!

Go to YouTube and search for homemade or DYI Leslie.

Re: HAMMOND M-100 need help!



Cool stuff! Hey, by the way, I've been trying to figure out how to hook a single speaker up to the M-100 (for a do it yourself leslie (I know! I know! Don't give me the long speech about how I should get a real one)) and I found some help in the manual, but I'm still lost; I know I have to do something with the voice coil terminal but I can't find it! I have no idea what it looks like or what exactly I'm supposed to use from it! Anybody have any info on that?</P>

Re: HAMMOND M-100 need help!



A former Hammond repair tech, I did many 'busbar jobs'.The story I heard in the early 70's was that Hammond changed vendors for the busbars and the new busbars had _too much_ silver in them. Sulphur in the air, from air pollution etcformed silver sulphide (an insulator) on the busbars. This is the same black stuff that forms on silverware and can be cleaned off withNEVR-DULL or something like that. I saw Hammonds in farmhouses that had coal heat, (coal has sulphur in it) and after some time most notes would not play at full level, some not at all. A busbar job made them like new. The kit that Hammond suppliedback then incuded a white greasein a plastic holderthat you pulled the busbar through after cleaning.The coatinggrease was to'seal' the cleanedbussbar to the air after the contacts separated at key-up.Theplastic tube had a slot for the busbars to go throughto coat it very lightlywith this grease, then you slid it back into the keyboard, yes, very carefully. Took about all day on some of these to do the job ina house. I turned the organ on it's right side on a pad and worked from there. You only wanted to slide busbars vertically. Some said cut the wires to the busbars, yes, then tack them back together with solder. </P>


Baldwin had a similar problem with their silver wire keyswitches on the late 60s early 70's models resulting in varying level on keys. Same cause, air pollution, which affected many things in electronics industry using silver contacts. The only solution there was to replace _all_ of the keyswitch wires with gold clad wires,whichBaldwin used starting in the early 70's. No chemicals or grease usedsince the wirescontacted a conductive elastomer (to reduce keyclicks) rather than metal to metal contacts like a hammond. And don't try spraying anythingas it will destroy the elastomer 'headers' and if these are bad the only solution is to replace them. Again it sometimes tookdays to replace all the contacts on a largeorgan. NEVR DULL seemed to work on wire voicing tab contacts using a pinch of the stuff.</P>

Re: HAMMOND M-100 need help!

Next step would be to add foldback, well documented with photos / video.That would be awesome.

Re: HAMMOND M-100 need help!

Well I am right in the middle of the lower busbar job (waiting for the soldering iron to heat up to solder the leads back on) and I figured I'd get on the forum real quick. So, in responce to George, I actually just got a camera for the sole purpous of documenting the last bits of the organ servicing! When I figure out how to I'll post the pictures and maybe a video or two and give you the heads up and you can tell all your friends "Hey! Check out what I helped this kid do!" . So thanks a holepunch for all the help!

[toasterDude]

Re: HAMMOND M-100 need help!



[quote user="Newb"]YOU GUYS ARE NOT GOING TO BELIEVE THIS!!!! I FIXED THE ORGAN AND SHE SOUNDS SSSEEEXXXXYYYY!!!!!!!!!!!!!!!!! [/quote]</P>


Hey, way to go, Newb! [&lt;:o)][B] Hats off to you for being bold and diving right in there. Glad it worked out for you.</P>


TD</P>


(PS thanks again George.)</P>

Re: HAMMOND M-100 need help!

Congrats and remember to post video/photos.

Re: HAMMOND M-100 need help!

YOU GUYS ARE NOT GOING TO BELIEVE THIS!!!! I FIXED THE ORGAN AND SHE SOUNDS SSSEEEXXXXYYYY!!!!!!!!!!!!!!!!! All I have left to do is the bottom busbars and maybe the drawbars and put her all back together. THANK YOU ALL SOOOOOO MUUUUCCHHHH!!!!!! I LOVE YOU GUYS [:D]

[geoelectro]

Re: HAMMOND M-100 need help!

[quote user="toasterDude"]

...thanks for the info, George. So, looking back at your earlier post also, a follow-up question:</p>


Have all the A100s you've seen, had the round brass busbars? Or have some had the silver ones?</p>


thanks,</p>


Scott</p>

[/quote]
</p>

No, not all by any means. Most do not.</p>

George
</p>

Re: HAMMOND M-100 need help!

Best tip: Take it  S L O W... Its not that a bent bussbar will hinder playing (though it is likely), its that a bent bussbar is nigh impossible to reinsert. There are numerous plastic guides that they have to be fed through throughout the manual.

Re: HAMMOND M-100 need help!



Well I am very joyus in saying that the manual had all the information that I needed! I have replaced the busbars and all I have left is to solder the lead wires which, as I just found out, is not as hard as I remember it being! I made a first attempt at soldering last night but realized I had some preparetory issues and had to remove the busbars again. However, now everything is ready and lined up for the solder. Things are going great and I just hope that my luck does not change. I have however been constantly worried about one thing; I am worried about bending the busbars. If I could, with reasonable ease, replace them from whence they cameis there still anyway that they would be bent and somehow effect the organ's performance?</P>

[toasterDude]

Re: HAMMOND M-100 need help!



...thanks for the info, George. So, looking back at your earlier post also, a follow-up question:</P>


Have all the A100s you've seen, had the round brass busbars? Or have some had the silver ones?</P>


thanks,</P>


Scott</P>

Re: HAMMOND M-100 need help!

[quote user="Newb"]I made a really stupid mistake and cut the wires to the busbars without writing down their order-now I'm totally in the dark-does anyone know what the order of the colors are for the busbar wires?[/quote]Why did I know you were going to do that? Sorry NewB, go back and read my last post. Ten to one, another one bites the dust.

[geoelectro]

Re: HAMMOND M-100 need help!



Older models do not have the brass round busbars and do not have the same issues. </p>

When you have intermittant key contact issues, the first thing to do is shift the busbars. The original factory position of the shifting screw would be completely clockwise. I often will test this to see if they have been shifted before.</p>

To shift, cancel all presets on both manuals. This insures no contacts are touching the busbars before you move them. Turn the shifting screw one or to times counterclockwise. Then, set the preset and check the contacts. The most precise way is one drawbar at a time on every key. I don't do that. I pull out the first 4 and run the manual. If any contacts are missing I will hear it. (At least on the first 4 DBs) Ideally, you want to see an improvement in the contacts. It may even take a couple of key runs as the new spot on the busbars being used has been unused and may have a slight amount of dust or tarnish there that the contact hopefully will remove.</p>

In some cases, you may get worse operation. If continued playing doesn't clear that up, you may want to try to get the busbars back where they were before. This is why its a good idea to remember exactly how much you turn them.</p>

Cleaning is the next step. A good cleaning will work wonders on the contacts assuming they are not worn out. Remember that these busbars wear out and the contacts as well. This is the one area of Hammonds that once worn out, means the organ needs to be replaced. There are over 1000 contacts in a console! We have replaced the manuals in a B-3 or C-3 using manuals out of A-100's. Replacing manuals certainly fixes this problem for a long time but you have to sacrifice a perfectly good working Hammond to do that. So, as you might have guessed, its not cheap either.</p>

George
</p>