Continental I making some nasty sounds

[gordo]

Hi All,

My Continental 1 (mono), has started making some nasty sounds.

It is a scream through the speakers like I am running sandpaper over the stylus. 

A song will be playing and without warning this scream comes through the speakers. It is louder with the volume up.

It stops just a quickly, but may return after a minute or so. Sometimes I can play several songs without any problem.

I have a Stanton cartridge installed.

At first I thought that the wires from the cartridge may be touching, however, upon checking they appear okay.

Can anyone think of what I need to check next?

Regards
Gordon

Sydney, Australia
 

[jukenorman]

Hi Gordon,
Always very difficult knowing what to suggest for such a "vague" fault. But for starters, you could do a general check of connectors; the multi-way between pre-amp and main amplifier, remove and reseat for example. Do the same with the valves/tubes (or "bottles" as an ex military tech. I used to work alonside over fifty years ago used to say!) - especially those with the metal screening shields. Since the screech varies with volume, that would point to the problem being in the pre-amp section.

Norman.

[Ron Rich]

Hi Gordo,
What in the H--- are you feeding that thing ?? AMi's require a very strict diet, of 117 volts !
As Norman said above-- that's USUALLY a "connection" of some type making a "poor" connection--BTW-- My grandpa, used to call tubes (valves), "glasses"- anytime his radio quit, he brought it to me and told me to "put in new glasses"-- still have that radio today--needs more then "glasses", now--- Ron Rich

[gordo]

Hi Norman and Ron,

FIXED! You guys are the best, thanks.

It must have been a poor connection in a valve (yes, we call them valves here).
All I did was remove all the valves and connectors and pushed them back and forth a few times.

Yes Ron, as you would know, we feed our jukeboxes 240 Volts downunder. the voltage is an easy fix with a stepdown transformer.
The 50Hz however, requires new gears to get the speed correct.

Thanks again,
Gordon.....

[Ron Rich]

Hi Gordon,
"--requires new gears--" on an AMi ??
I did not know this ??
Ron Rich

[gazzy58]

Hi Gordon "GEARS"! are you sure. To alter the turntable speed on an AMI Continental you should just have a spring that slides over the TT shaft. Glad you cured the noise. Gary

[gordo]

You guys are correct, I have only changed the gears on my Wurlitzer 1100 and my Seeburgs.

[Ron Rich]

Gordon,
Speaking ONLY fro myself-- I am never rong-- just not alwayz write-- er, rite--no, correct ! Ron Rich

[doghouseriley]

Nov 9, 2021 11:40:02 GMT gazzy58 said:

Hi Gordon "GEARS"! are you sure. To alter the turntable speed on an AMI Continental you should just have a spring that slides over the TT shaft. Glad you cured the noise. Gary

Same with my Rock-443. It too has a coil spring on the end of the motor shaft which turns the jockey wheel.

But my 468 has a gear wheel screwed to the shaft.

[Ron Rich]

Hi Doghouse,
What is a "gear wheel"? Can you post a photo ? Ron Rich