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    Building, troubleshooting and testing of these amplifiers should only be
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    the safety precautions around high voltages.

Philips AD3800AM and AD9710AM clones

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aldovan

Member
Joined 2005
Dear friends

I have interest in build Philips AD3800AM and AD9710AM speakers clones.
The impedance for this speakers is 800 ohms.
But I no have the voice coil resistance information.
Anyone have this information or can to measure the voice coil resistance for help me ?
The specifications for this speakers is fine, too.


Thanks,

Aldovan
 
M

markanica

Member
Joined 2004
Hi there

As I have those in my possesion, I took a quick multimeter reading for you:
AD 3800AM : 650 Ohm 16 mH and another one reads 600 Ohm 22 mH

AD 9710AM : 660 Ohm 27 mH and another one reads 680 Ohm 30 mH

All are dated 1959

Those coils are made from really thin wire, I hope you will succeed..
 
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