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Re: Leslie fitting kit instructions.
Michael Durrant
From the Fishorgans site Chris provided -? I always found this helpful,? On Sat, Mar 28, 2020 at 2:55 PM Chris Clifton <clifton.christopher@...> wrote:
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Re: Leslie fitting kit instructions.
开云体育You'll find? a wiring diagram for a typical 122 speed switching kit as used with a C-3 here, . Note that the 122 and 147 use different speed switching systems. Although they both use the same type 6-pin cable their wiring schemes are incompatible, dangerously so! The 251 is different again, although it has more in common with the 147 than the 122. Again, the differences make it dangerous to plug a 251 into a connection meant for either of the other two, or vice versa. This,
may be useful, a list of most, if not all, standard Leslie
connector kits with links to their wiring diagrams, On 28/03/2020 20:42, Adrian Rose via
Groups.Io wrote:
Hi Guys,ive bought a rough old C3 ,145 and 222rv.(?750) --
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Leslie fitting kit instructions.
Hi Guys,ive bought a rough old C3 ,145 and 222rv.(?750)
the console has a 428-13 box inside(which is for a 122 series),but theres all sorts of wires loose coming out of it Its only got a speed switch and no MEE. So theres only one box not two in the console. Has anyone on here got any wiring instructions for this. Failing that ,anyone got a NOS 122 fitting kit ? I have got a kit that came off an organ for a 251 ( 012617).Is that wired the same.Of course i havnt got a wiring diagram for that either. Adrian |
Re: Homemade Half Moon Footswitch
开云体育After my last post, I googled the LBB and looked at it on their
website. As you say it does have a two pole mains connector. As
the Leslie is powered through the LBB, it effectively also has a
two pole connector. I would say that the small shock you are
getting is almost certainly coming from the Leslie, due to the
charging current of the interwinding capacitance, rather than any
breakdown of insulation. The best work around, without going to
the trouble of providing a mains ground to the Leslie chassis, is
to find which way round the mains input plugs are fitted when you
don't get a shock, both the inlet to the LBB, and the wall plug.
Then mark the plugs so that you always fit them this way around.
Maybe Booker Labs will be happy to fit a three prong, grounded
mains inlet for you when they do the other mods. The only possible
downside of grounding old equipment with this problem is that
enough current may flow to ground to trip modern safety breakers.
You may remember the recent discussion about replacing the mains
wiring on a B-3. Some people said they always update to three
prong grounded mains connectors when rewiring, others said no
because of problems with safety circuit breakers tripping. There's
no easy answer to this, one of the joys of using vintage
electrical equipment! I well remember 40+ years ago when clubs
started fitting saftey circuit breakers to their stage power
supply to protect artistes, even brand new Hammonds and Leslies in
perfect working order could sometimes cause these circuit breakers
to trip out. On 25/03/2020 18:08,
andrew.bryce.howard@... wrote:
It's certainly not much of a shock. A little more so than licking a 9V battery. --
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Re: Homemade Half Moon Footswitch
It's certainly not much of a shock. A little more so than licking a 9V battery.
I'm glad, going by your explanation, that I'm having the pros look it over. The LBB does, in fact, have a two-prong outlet. Next time it happens, I'll have to test the Leslie itself with my multimeter. Many thanks! |
Re: Homemade Half Moon Footswitch
开云体育Well, to start with, 12 volts isn't enough to give you a shock. You could for example grab one terminal of a car battery with each hand and not feel a thing, even with wet hands. Secondly, you're not switching a high current 12 volt source to ground, you're connecting 12 volts through a resistor to ground. When the switch is open, this 12 volts is used to switch the internal logic of the LBB to one state, when the switch closes the 12 volt input to the logic becomes 0 volts and the logic changes state and operates the internal switching? to change the Leslie speed. If you're sometimes getting a small shock from the switch this
suggests that some AC mains current is getting to the chassis
ground of the Leslie or the LBB. This shouldn't be able to happen
if everything is properly grounded to a three pin power outlet. If
there was anything more than the slightest leakage, the safety
breaker on current house wiring systems would trip and cut the
power off. If you're using a two pin power oulet, it's not
uncommon for mains transformers in vintage equipment (such as a
122 Leslie) to have enough leakage (strictly speaking the charging
current of inter winding capacitance rather than an actual
connection) to cause sufficient AC voltage to appear on the
chassis of the Leslie, and thus the chassis of any connected
equipment, to cause a "tingling" sensation when the chassis is
touched.? If the two pin mains plug isn't polarised, you may well
find that you get a tingle with the plug in one way round but not
the other. On 24/03/2020 17:37,
andrew.bryce.howard@... wrote:
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Re: Homemade Half Moon Footswitch
I just got off the phone with James and Tom at Booker Labs. They heard about my post through the grapevine and have offered to look the switch over while they’re modding my LBB.? Thanks for offering to help, regardless!?
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Re: Homemade Half Moon Footswitch
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On Mar 23, 2020, at 16:25, andrew.bryce.howard@... wrote:
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Homemade Half Moon Footswitch
I'm having a weird problem. I bought a Booker LBB to use my guitar with my Leslie 122. It works quite nicely. It requires a footswitch to change speeds. So I built one. The standard for the CU-1 Half Moon switches is that you ground either the tip or the ring to select fast/slow. Oddly, to my mind, what you're grounding is 12V. Now, sometimes, but only on occasion, those 12 volts will get passed into the casing of the footswitch and the cable connectors and give you a slight shock. How does the CU-1 handle this? Is the whole mechanism electrically isolated? Or am I missing some essential information about how this is meant to work? Why, for instance, doesn't it always shock me if it's passing 12V to ground no matter which speed is selected? I'm very confused. Thanks for any help you can give.
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Re: Hammond PR 40 Reverb Issues
Thank you one and all for the help and words of encouragement,it all helps. I was drawing from my guitar amp knowledge when I changed the transformer because if it were an output trans that far out of balance it would sound terrible,or worse. Is there an "off the shelf" transistor I can use? Other than using a heat sink when installing them I know very little and usually run scared. As for a better soldering iron Scott, I've gotten comfortable with my woodburning pencil with the rusty nail for a tip so i dont want to change and learn all over again,but good advice nonetheless.
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Best Regards, ?John
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Re: Hammond PR 40 Reverb Issues
Keep going John in all peace. Friday the 13th is the special lucky day here in France. So enjoy it! Once in a while I pray to God about our Hammond... And God is good... Better than Friday the 13th. Blessings? Ali On Tue, 3 Mar 2020, 06:18 john alluneedtoknow via Groups.Io, <keysnleslie122=[email protected]> wrote: I was born on Friday the 13th. The amp cleaned up and quieted down nicely with the new caps and the bass was more full and round, but it was still noisy with reverb on so I probed further. I ended up replacing some plate load resistors and did much head scratching. I isolated the reverb transformer and its secondaries, then measured each to the center tap, brown/209 ohms and blue/279 ohms, so I swapped in a better unit measuring 229/245 ohms. These two actions cured the issue. I played it for 5 days with no problems,until tonite when I reinstalled it,sounded wonderful, then POP......! Reverb now MIA,except for some noise,and the return works when touching the springs, but with reverb off still good,nice and quiet. Should I give up or purchase a large hammer? |
Re: Leslies for an H-100 and R-100
开云体育Both are single channel Leslies, and the organs are two channel.
The short answer is that neither is a good match for either organ.
However, there was a 122 kit made for connecting the 122 to an H-100. Basically the kit took the two channels available at the tone cabinet outlet of the H mixed them together and amplified them to a suitable level (the tone cabinet outlets have a much lower level than typically required for a leslie) and provided speed switching control. Presumably, the same principle could be applied to connecting the 860, or indeed almost any other single channel Leslie. I don't believe that there ever was an "off the peg" kit. The R-100 really does require a two channel Leslie, 700, 710, 720
or HL722/822 would suit. I've also seen R-100's connected to 610
Leslies, (one of the few organs a 610 is good for!) On 03/03/2020 15:42, Anthony Leeman
wrote:
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Re: Hammond PR 40 Reverb Issues
开云体育I did not follow this. thread in full but since I’m being at revising some PR40s at the moment, I found that one cause for noisy or weak reverb can be the transistor 2N306? in the receiver circuit of the spring reverb (AO-33-1). The 100uF emitter capacitor often is anoter culprit. I dropped in some standard silicon NPN transistor with an hfe (current gain) of 100-300 and it made reverb come back.? BTW, it is totally normal that the Ohm values of the primary windings differ. Important is the winding ratio. And this is a constant. The difference in the ?ohmage“ is that the windings are stacked one upon the other with the circumference changing resultig in different wire lenghts for either winding. So changing the OT is a shot in the dark. — Christoph
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Re: Hammond PR 40 Reverb Issues
开云体育Or maybe a better soldering iron? On 3/2/2020 9:18 PM, john
alluneedtoknow via Groups.Io wrote:
I was born on Friday the 13th. The amp cleaned up and quieted down nicely with the new caps and the bass was more full and round, but it was still noisy with reverb on so I probed further. I ended up replacing some plate load resistors and did much head scratching. I isolated the reverb transformer and its secondaries, then measured each to the center tap, brown/209 ohms and blue/279 ohms, so I swapped in a better unit measuring 229/245 ohms. These two actions cured the issue. I played it for 5 days with no problems,until tonite when I reinstalled it,sounded wonderful, then POP......! Reverb now MIA,except for some noise,and the return works when touching the springs, but with reverb off still good,nice and quiet. Should I give up or purchase a large hammer? |
Re: Hammond PR 40 Reverb Issues
I was born on Friday the 13th. The amp cleaned up and quieted down nicely with the new caps and the bass was more full and round, but it was still noisy with reverb on so I probed further. I ended up replacing some plate load resistors and did much head scratching. I isolated the reverb transformer and its secondaries, then measured each to the center tap, brown/209 ohms and blue/279 ohms, so I swapped in a better unit measuring 229/245 ohms. These two actions cured the issue. I played it for 5 days with no problems,until tonite when I reinstalled it,sounded wonderful, then POP......! Reverb now MIA,except for some noise,and the return works when touching the springs, but with reverb off still good,nice and quiet. Should I give up or purchase a large hammer?
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Re: Unknown hammond organ
#built
Piano Mover picking up in North Florida on Wednesday. Gotta get it to Central Florida. On Mon, Mar 2, 2020 at 10:44 AM Chris Clifton <clifton.christopher@...> wrote:
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Re: Low output of lower manual low octave of B3
I had the same issue with?a customer's B3, and spent hours troubleshooting, and even removing the matching transformer and deGaussing it.? No luck.? Got a donnor matching transformer from another organ and it fixed the?problem.? Not saying this is the problem your having but once you exhaust all other possibilities, keep this in mind. You should replace the resistors and cap in the Matching tranny first. Jay's Organ Service On Mon, Mar 2, 2020 at 4:04 PM Randall via Groups.Io <ogaci54=[email protected]> wrote: I know this has been asked many times, and have heard something about the "foldback", but, what should I look for when it comes to low volume level on the lower manual notes between the lowest C and the next C ? I cannot do a nice walking bass as it barely audible with normal settings. |