Heathkit 401-21

[Emil Dular]

Thanks for that info, Tom.  That verifies the speaker should be usable.

73, Emil


> My 1984 Parts Master File says 3.2Z 1.5W and 3.5 square for the 401-21.
>
> Tom K3TVC
>

>> I've got Gonset IV with a bad speaker, voice coil is open. It is a 3.2 
>> ohm 3.5 inch square, Gonset part number 152-017.  The size is tough 
>> enough to find, but the original has an ALNICO magnet and all the 
>> possible modern replacements I can find have the big round ceramic 
>> magnets. The problem is that the big new type magnet will not fit.  I 
>> don't know who made the speaker for Gonset in 1961 but there is SP-CO-243 
>> printed on the backside of the cone.
>>
>> Anyway, it sure looks like the speaker in an Heathkit signal tracer would 
>> fit the bill. I think they used speaker part number 401-21 in all of them 
>> from the T-3 to the  IT-12.  Anyone know what impedance it is?
>>
>> So anybody have a good speaker that will fit and they will sell?
>>
>> 73 es tnx Emil WD4SCZ
>
>
> 

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