From ted@speakeasyvintagemusic.com Fri Jun 29 07:32:17 2007
Subject:Re: Motor delay

According to my sources, EIS said the following in 2003 - he was
speaking of vintage connector kits, which our preamp faithfully emulates:

"...If you install the tremolo control circuit in the pre-amp, use a 33
- 36v 1w zener diode to ground, in parallel with the 47K, 1w resistor.
The cathode (banded) end goes to the resistor junction. This limits the
switching voltage to the zener value, prevents the momentary off
condition when switching from chorale to tremolo..."

I don't know the particulars of the EIS relay, but I do know our preamps
are designed to emulate the *original* gear. If the replacement relay
was also designed to emulate the original gear (Ours does) then it would
behave in the same manner as the original gear.

In any case, as stated by the manufacturer in the quote above, his relay
won't behave properly even with the vintage kit...

Cheers!

Ted Thompson
General Manager - Speakeasy Vintage Music

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Ryan Stroup wrote:
> Hey guys. I just installed a pair of 2 speed motors in one of my Leslies
> and there seems to be some delay between the time when the slow motor
> disengages and the fast motor starts. I thought this was a problem only
> with the upper motor stack, but when I removed the belt from the lower
> motor pulley and watched, the lower motor did the exact same thing. Both
> motor stacks have been thoroughly cleaned and oiled. The slow motor has
> been properly adjusted on both motors. I thought maybe the slow motor
> shaft was possibly too tight so it couldn't disengage quick enough,
> causing the fast motor to lock up, however, I watched the shaft
> disengage but the fast motors didn't switch on instantly like it should.
> It was like a 0.5 second delay (if even that long) before the fast motor
> would kick in. Like I say, it wasn't very long, but long enough to cause
> the motor to stop and then start up. It's not so noticeable with the
> lower rotor because it coasts for that short time, but the horn stops
> then starts back up to tremolo speed.
>
> I recently installed an EIS relay in my 122 amp for silent speed
> switching and to speed up response time. It works fine when I switch
> from tremolo to chorale, but from chorale to tremolo there's still a
> delay in response time. I contacted Bob Schleicher about this and he
> said it had something to do with the Speakeasy preamp. I'll have to look
> it up his email to see exactly what he said. It's been over a month ago
> and I've slept since then. I have a feeling the preamp is responsible
> for this delayed transition between the slow motor and fast motor.
>
> Any thoughts or suggestion are very welcome and I'd appreciate it.
>
> Thanks
> Ryan
>
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