Hammond Organ

[John Ross]

Hi,
On Hammond organs with tone wheel generators, it is imperative to oil
the generator, once a year. It must be Hammond oil that is used.
I remember when I was tuning for a Beach Boy concert, they had a Hammond
that had been adapted to solid state genarators, by a company in
California. I would imagine it was an expensive proposition, and would
not be warranted on an RT3.
I have only seen solid state replacements for the rectifier tubes
(valves)  Although in the back of my mind I seem to remember outputs as
well.
Regards,
John M. Ross

Ward & Probst wrote:

>  Jims et al,Harvey is right about most of the stuff. The 5Y3 is a
> rectifier tube for the pedal solo unit power supply. The pedal solo
> has 32 foot stops as well as 16 foot, etc. It generates the
> frequencies electronically rather than from the tone wheels. I would
> not think all the tubes would be bad, it would be rare in my
> experience. If you can find a technician to check it for you, it might
> be to your advantage to do so. Tone wheels keep on turning, Dale
>
> Dale Probst
> Registered Piano Technician
> Ward & Probst, Inc.
> Piano & Organ Service
> Wichita Falls, TX
>
>
> http://www.ptg.org/1999/conv/
>
>
> -----Original Message-----
> From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On
> Behalf Of harvey
> Sent: Saturday, March 27, 1999 11:24 PM
> To: pianotech@ptg.org
> Subject: Re: Hammond Organ
>
> To JimRPT: valves and tubes (one is Euro version);
>
> To Elian: Unless something has changed, it's unlikely that solid state
> replacements are available for anything other than, possibly, the
> rectifier tube.
>
> To Rogerio: No problemo con los valvos nuevo, pero... porque su piensa
> que los valvos esta malo o roto? If memory serves, the RT3 is
> primarily a tone wheel generator model. The on-board electronics
> served as a pre-amp for another remote slave amplifier/cabinet. There
> may have been some square black tabs on the console that either
> coupled or did something with pedal tones (sub-frequencies).
>
> It certainly won't hurt to have new tubes (valves), since it will give
> you backups. However, the 'newest' RT3 is now... old. More than likely
> you will find problems with either the filter capacitor, and/or the
> coupling capacitors. Now, really trusting memory, your tube functions
> would likely be:
> 5U4 = rectifier, as mentioned;
> 12AX7 = preamp
> 5Y3 = phase inverter
> 6L6 = output
> etc. = never heard of this one. 8-}
>
> I see you now have a source for tubes. If the new tubes don't work
> out, E-mail me (or Dale Probst).
>
> Regards,
> Jim Harvey, RPT
> (y perdonome Espanol.. mucho tiempo pasada)
>
> At 08:27 PM 3/26/99 -0300, you wrote:
>
>> To the list.
>> There are someone on the list that knows where I may to buy a full
>> set of valve tubes to the my church's Hammond organ model Concert RT
>> 3 .
>> I need to buy this and is better if from USA and, if possible, is
>> more easy to connect by email or fax.
>> I thanks to all
>> ROGERIO CUNHA - IC MEMBER OF THE GUILD
>
>
>
>  Jim Harvey, RPTGreenwood, SCharvey@greenwood.net