Graham-ophones

Links

ARTY GB (1) copy Zwarteschijf

Various Parts

Ken Priestley

Leather cloth

F R Ratchford J Hewitt

Diaphragms

Meadows and Passmore

PLEASE NOTE:

I DO NOT SUPPLY

ANY PARTS

I'M MERELY

A COLLECTOR.

General Motor Topics

The Governor

 

The governor assembly is the means by which the speed of the gramophone is controlled.  Weights are thrown outwards by inertia as the assembly revolves bringing a brass disc and a liliting pad into contact.  The pad is capable of being moved by connection to the speed control arm or knob on the motor deck.The amount to which this disc is allowed to move and therefore the extent to which the weights are thrown outwards detremines the speed.  It's obvious therefore that contact between the disc and the limiting pad is present during playing which causes friction.  To limit this the disc and pad require lubrication.   Up until recently I have always lubricated the governor plate and pad with good old "3 in 1" oil but apparently this, over time,  can become sticky causing  fluctuations in the rpm and therefore lead to what I used to know as "wow and flutter" in my hifi days.  A better solution than "3 in 1" is sewing machine oil.

 

Grease for Motors

 

This is often a topic of much debate.  Purists even go to the extent of creating greases from original recipes.  Others use available greases and dilute them with engine additives.  Modern greases using molybdenum, lithium and Teflon have been reported as all being suitable for gramophone motors although some concern has been expressed regarding molybdenum although I hhave used this on some machines and not encountered any problems.  The concern seems to be that when used on a mainspring its consistency can cause suction between the coils.  This means that there is a sudden release of energy similar to that caused when old grease in spring cases has stuck coils together.  The effect of this is a "bumping" sound from the motor as coils in the spring suddenly releases which can cause damage.  General purpose grease sold at car accessory shops is the one I use and on balance this seems to have general acceptance.

Lubrication

HMV C101J 2 021

Noisy Motor

 

It's inevitable that by the time your gramophone got to you it's already done alot of record playing.  Parts, particularly in the motor, will be worn but when approaching the problem of sorting out the noise use common sense as a starting point.  First of all check for loose components around the governor armature and the amount of play in the arm itself.  Now move onto the components themselves.  The parts that move the fastest wear the most so start with them.  The first port of call should be the bearings at the ends of the governor armature and the bearing at the base of the spindle. After that you can move onto worn gears again starting with those that turn fastest.