What’s wrong with the original scanner?

Don Resor

Sent from someone's iPhone

On Sep 13, 2022, at 8:02 PM, Rich Reid via groups.io <richreid01@...> wrote:

?I have a question I hope someone can answer. Is the vibrato scanner in
an A-100 and B2, C2, interchangeable? I have a customer with an A-100
and I want to clean/rebuild a scanner to take with me and just install
it on site. I have a C2 that would be the donor. I also have an A-143
which I assume would be the same as in the A-100. Anyone know about
these? Are there different parts or are they the same?

thank you.

Rich Reid
208-861-9263

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The A-143 scanner will definitely be the same, the only differences between any organ in the A-1** range and any other organ in the range are purely cosmetic changes to the cabinet, C-3 and B-3 scanners would also be 100% interchangeable with A-100 series. Not sure about the C-2, B-2 scanners, these organs were rare in UK, but I suspect they will be the same. Unlikely that there would be any internal variation if they are identical externally.

I have a question I hope someone can answer.? Is the vibrato scanner in
an A-100 and B2, C2, interchangeable?? I have a customer with an A-100
and I want to clean/rebuild a scanner to take with me and just install
it on site. I have a C2 that would be the donor. I also have an A-143
which I assume would be the same as in the A-100. Anyone know about
these? Are there different parts or are they the same?

thank you.

Rich Reid
208-861-9263

--

开云体育

Ground loops could be a problem if you connect the chassis to mains ground, and then plug into an amplifier that also has a mains ground. If the internal power supply is designed to be used as a double insulated appliance, then a safety ground to chassis isn't strictly necessary. If you do connect the keyboard chassis to ground, then am isolating DI box with "ground lift" may be needed in the audio line between the keyboard and any external amplifier.

The only other concern would be finding a suitable space inside the keyboard for the power supply, in my experience, internal space is at a premium in many keyboards. Have several trials to make sure everything fits in the available space with suitable clearance before doing anything irreversible like cutting a hole for the IEC connector. Also be aware that switched mode power supplies radiate electromagnetic noise, try to keep the power supply as far away as possible from sensitive audio circuits. If noise pick up is a problem, you may need to enclose the power supply in a metal box, (with suitable ventilation holes), connected to chassis ground.

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Dear all,

Just came across a classified ad for a Hammond 7122L model



Can anyome helo me and inform if this is a tonewheel model or a transistor one ?

Thanks a lot !
Vasco

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If I recall, the 26-1 is a universal kit to connect to any organ with built in speakers, exactly what you need.

Tonewheel General suggests a 26-1 kit. I have been looking? at that connection and found some instructions from Captain Foldback. I think I am going to recommend that. That seems pretty straight forward and hopefully it will work well.

I have an A-143 myself, which is way off the back burner for now but I will build a kit for that and a 122.

Thanks for the advice and tips. Any more info is welcomed.

On 8/5/2022 1:35 AM, Chris Clifton wrote:

The main problem with that type of connection is that you can't use a simple M-E-E switch system. The console load resistor setting in the speaker has to be set to "open" resulting in a loud hum from the Leslie in the main position. Also there will be no reverb when set to echo.

On 05/08/2022 08:11, Christoph wrote:

Rich,

connecting an A-100 to a 147 (145) is usually done via the speaker wires. Search for 8444 Leslie kit and you’ll probably find

This also requires an M-E-E Halfmoon, to do it right, allowing MAIN-ENSEMBLE-ECHO modes (Console alone, Consol+Leslie, Leslie only).

Question also is whether you want to mix reverb and normal signal. Some like it, others not, because reverb is ?spun around“.

Surely there is a straight and cheap method by taking the G-GND wires directly to the 6pin Leslie connector and switching like in the following diagram:?

Christoph?

Am 05.08.2022 um 01:21 schrieb Rich Reid via groups.io <richreid01@...>:

Hello list members,

??? I will be connecting an A100 to a 145 type Leslie. I think the
Leslie is actually a 245. Can you tell me what kind of kits are
available?? I figure I could use one of the G terminals and ground for
signal and ac power and switch but perhaps a full kit might be what this
lady wants. I would like to know the options.

thanks

--
Rich Reid
208-861-9263

--

--
Rich Reid
208-861-9263

--

开云体育

Sorry, my mistake, I'd thought that the 8444 was a G-G type kit. As you say a connection to the speaker wires with the load resistor set to either 8 or 16 will not hum. I prefer 16 with an A-100, as I said previously, I've had a number of call outs in the past due to burnt out 8 ohm console load resistors.

Connecting a 147 type Leslie to one G and ground is problematic because the preamp output will not drive a low impedance load. One Leslie connected directly to a G terminal will work fine with the load switch set to open, but at soon as you try to switch it off using an M-E-E switch hum will be picked up in the unscreened Leslie cable where signal and power leads share the same jacket

Chris,

I see no problem with using an 8444 kit. Why should there be a ?loud hum“? The installation instructions for the A-100 say that the load resistor in the Leslie speaker has to be set to 8 Ohms load.

—

Christoph?

Am 05.08.2022 um 09:35 schrieb Chris Clifton <clifton.christopher@...>:

?

The main problem with that type of connection is that you can't use a simple M-E-E switch system. The console load resistor setting in the speaker has to be set to "open" resulting in a loud hum from the Leslie in the main position. Also there will be no reverb when set to echo.

On 05/08/2022 08:11, Christoph wrote:

Rich,

connecting an A-100 to a 147 (145) is usually done via the speaker wires. Search for 8444 Leslie kit and you’ll probably find

This also requires an M-E-E Halfmoon, to do it right, allowing MAIN-ENSEMBLE-ECHO modes (Console alone, Consol+Leslie, Leslie only).

Question also is whether you want to mix reverb and normal signal. Some like it, others not, because reverb is ?spun around“.

Surely there is a straight and cheap method by taking the G-GND wires directly to the 6pin Leslie connector and switching like in the following diagram:?

Christoph?

Am 05.08.2022 um 01:21 schrieb Rich Reid via groups.io <richreid01@...>:

Hello list members,

??? I will be connecting an A100 to a 145 type Leslie. I think the
Leslie is actually a 245. Can you tell me what kind of kits are
available?? I figure I could use one of the G terminals and ground for
signal and ac power and switch but perhaps a full kit might be what this
lady wants. I would like to know the options.

thanks

--
Rich Reid
208-861-9263

--

--

开云体育

HOw about this versus the 6147 Hammond kit?

thanks again

Chris,

I see no problem with using an 8444 kit. Why should there be a ?loud hum“? The installation instructions for the A-100 say that the load resistor in the Leslie speaker has to be set to 8 Ohms load.

—

Christoph?

Am 05.08.2022 um 09:35 schrieb Chris Clifton <clifton.christopher@...>:

?

The main problem with that type of connection is that you can't use a simple M-E-E switch system. The console load resistor setting in the speaker has to be set to "open" resulting in a loud hum from the Leslie in the main position. Also there will be no reverb when set to echo.

On 05/08/2022 08:11, Christoph wrote:

Rich,

connecting an A-100 to a 147 (145) is usually done via the speaker wires. Search for 8444 Leslie kit and you’ll probably find

This also requires an M-E-E Halfmoon, to do it right, allowing MAIN-ENSEMBLE-ECHO modes (Console alone, Consol+Leslie, Leslie only).

Question also is whether you want to mix reverb and normal signal. Some like it, others not, because reverb is ?spun around“.

Surely there is a straight and cheap method by taking the G-GND wires directly to the 6pin Leslie connector and switching like in the following diagram:?

Christoph?

Am 05.08.2022 um 01:21 schrieb Rich Reid via groups.io <richreid01@...>:

Hello list members,

??? I will be connecting an A100 to a 145 type Leslie. I think the
Leslie is actually a 245. Can you tell me what kind of kits are
available?? I figure I could use one of the G terminals and ground for
signal and ac power and switch but perhaps a full kit might be what this
lady wants. I would like to know the options.

thanks

--
Rich Reid
208-861-9263

--

--
Rich Reid
208-861-9263

开云体育

Tonewheel General suggests a 26-1 kit. I have been looking? at that connection and found some instructions from Captain Foldback. I think I am going to recommend that. That seems pretty straight forward and hopefully it will work well.

I have an A-143 myself, which is way off the back burner for now but I will build a kit for that and a 122.

Thanks for the advice and tips. Any more info is welcomed.

The main problem with that type of connection is that you can't use a simple M-E-E switch system. The console load resistor setting in the speaker has to be set to "open" resulting in a loud hum from the Leslie in the main position. Also there will be no reverb when set to echo.

On 05/08/2022 08:11, Christoph wrote:

Rich,

connecting an A-100 to a 147 (145) is usually done via the speaker wires. Search for 8444 Leslie kit and you’ll probably find

This also requires an M-E-E Halfmoon, to do it right, allowing MAIN-ENSEMBLE-ECHO modes (Console alone, Consol+Leslie, Leslie only).

Question also is whether you want to mix reverb and normal signal. Some like it, others not, because reverb is ?spun around“.

Surely there is a straight and cheap method by taking the G-GND wires directly to the 6pin Leslie connector and switching like in the following diagram:?

Christoph?

Am 05.08.2022 um 01:21 schrieb Rich Reid via groups.io <richreid01@...>:

Hello list members,

??? I will be connecting an A100 to a 145 type Leslie. I think the
Leslie is actually a 245. Can you tell me what kind of kits are
available?? I figure I could use one of the G terminals and ground for
signal and ac power and switch but perhaps a full kit might be what this
lady wants. I would like to know the options.

thanks

--
Rich Reid
208-861-9263

--

--
Rich Reid
208-861-9263

开云体育

开云体育

The main problem with that type of connection is that you can't use a simple M-E-E switch system. The console load resistor setting in the speaker has to be set to "open" resulting in a loud hum from the Leslie in the main position. Also there will be no reverb when set to echo.

Rich,

connecting an A-100 to a 147 (145) is usually done via the speaker wires. Search for 8444 Leslie kit and you’ll probably find

This also requires an M-E-E Halfmoon, to do it right, allowing MAIN-ENSEMBLE-ECHO modes (Console alone, Consol+Leslie, Leslie only).

Question also is whether you want to mix reverb and normal signal. Some like it, others not, because reverb is ?spun around“.

Surely there is a straight and cheap method by taking the G-GND wires directly to the 6pin Leslie connector and switching like in the following diagram:?

Christoph?

Am 05.08.2022 um 01:21 schrieb Rich Reid via groups.io <richreid01@...>:

Hello list members,

??? I will be connecting an A100 to a 145 type Leslie. I think the
Leslie is actually a 245. Can you tell me what kind of kits are
available?? I figure I could use one of the G terminals and ground for
signal and ac power and switch but perhaps a full kit might be what this
lady wants. I would like to know the options.

thanks

--
Rich Reid
208-861-9263

--

开云体育

The official kits for an A-100 connected to the speaker output of the organ's main amp. One thing to watch for when using these kits is to make sure that the reverb drive feed, normally taken from the organ main speakers is connected upstream of the Leslie kit so that reverb is always available regardless of Echo switch setting, (reverb will always be through the organ's internal reverb speaker). Connecting from one of the "G" terminals of the pre-amp to ground is possible, but raises problems with echo switching. Also, even if you manage to produce a working echo switch system, there will be no reverb when the switch is in the echo position.

Universal type kits intended for organs with built in speakers will work best. There is a list of Leslie kits with links to schematics and kit instructions at . The type of kit you require will usually have a number starting 007.

One last tip, I often had a fault reported on A-100 + 147 type installations, "Hum on the Leslie when switched to Main". The A-100 produces enough power to burn out the 8 ohm? load resistor in the Leslie amp. Setting the console load resistance switch to 16 ohms, actually two 8 ohm resistors in series avoids this as the power is not only halved, but shared between the two resistors.

Hello list members,

??? I will be connecting an A100 to a 145 type Leslie. I think the
Leslie is actually a 245. Can you tell me what kind of kits are
available?? I figure I could use one of the G terminals and ground for
signal and ac power and switch but perhaps a full kit might be what this
lady wants. I would like to know the options.

thanks

--
Rich Reid
208-861-9263

--

开云体育