Mounting coils

[simonbaker]

Thought for the day:

Question about fixing coils into the search head of the MD:

I see some coils wrapped in tape, then glued into search head.

Are the coils soaked with glue before wrapping with tape?

Reason I ask is: any looseness in coil will cause sonic vibrations of wires, possible phase jitter, I am guessing. It seems advisable to me to make sure coil wires are saturated in thin solution of glue so they become rigid mass, can't move at all. Wrapping first with tape does not allow glue to soak into wires.

Cheers!

-SB

[Aziz]

Hi Simonbaker,

I am fixing the coil windings first with a thin enamelled copper wire. One end of the wire is connected to shielding. The other end is left open and isolated (potential free). Or you can bind the windings with some fishing thread instead of enamelled copper wire.

Then the windings will be fixed with fibre glass and resing. After that the shielding is made. To protect the shielding, a second fibre glass layer is done. Although this makes the coils quite heavy but very very tight. One layer of fibre glass is also quite stable. The resin goes into the coil windings.

See pictures below.

Aziz

[simonbaker]

Hi Simonbaker,

I am fixing the coil windings first with a thin enamelled copper wire. One end of the wire is connected to shielding. The other end is left open and isolated (potential free). Or you can bind the windings with some fishing thread instead of enamelled copper wire.

Then the windings will be fixed with fibre glass and resing. After that the shielding is made. To protect the shielding, a second fibre glass layer is done. Although this makes the coils quite heavy but very very tight. One layer of fibre glass is also quite stable. The resin goes into the coil windings.

See pictures below.

Aziz

That sounds very good, the resin going into the windings. Should be a very quiet and durable coil. It is exciting to see your laptop MD being born.

Keep us posted,

Regards,

-SB