Re: PR machine gun

[KeyboardSystems@sisna.com (Jim Duane)]

John,


        If all else fails, we at Keyboard Systems offer a replacement PR
cabinet (solid state) amplifier for $199.00.  It does not have reverb, but
you can add Trek II reverb to the organ which is much better reverb than
the old necklace reverb springs.

Jim Duane
Product Manager
Keyboard Systems

______________________________________________________________________________

>On Aug 03, 1996 06:13:16, '"John Bittner" <jbitt@primenet.com>' wrote:
>
>
>>>I own an RT-3 with two PR tone cabinets \/\snip\/\ begins to hum --
>>>sometimes loudly\/\snip\/\. After being on for about 15 minutes, it
>begins to
>>>stutter out machine-gun like explosions of sound. \/\snip\/\
>>>
>>
>>First determine whether the trouble is mechanical by giving the cabinet a
>>jolt and wiggling cables.  If this has any effect at all on the problem,
>>look for tubes loose in their sockets, bad cable connections, etc.
>>
>>If it's not mechanical, then its electrical.  Could be a tube, but more
>>likely
>>an aging electrolytic capacitor.
>>
>>John Bittner
>>X-77 owner
>>
>
>I agree with John, and lean toward the aging electrolytic. Having serviced
>and played through many tube amps I've seen just this condition. The hum
>lends credence to this being filter cap related. Also, the motorboating
>sometimes starts slow and increases in rate, possibly stopping for a few
>seconds then starting again.
>
>Don't delay in servicing this. Had an ugly experience as one of my own
>started billowing smoke under this condition about 6 inches behind my head
>(should've seen the look on the guitarist's face-I didn't have a clue at
>first-the fishy smell gave it away just before I started to gag on the
>fumes). Needless to say I ripped the amp out of the wall and ditched it out
>the rear door before our small rehearsal studio became fully enshrouded
>with stink and smoke!
>
>Good luck.
>
>Ed S
>
>