Heathkit 401-21

Neil Morrison neilsmorr at GMAIL.COM
Thu Apr 22 18:47:42 EDT 2010


How about
http://www.rpelectronics.com/English/Content/Items/61-690-1.asp
If you phone them they will probably measure the magnet for you.
It's 8 ohms but how much difference will that make?

Neil

--------------------------------------------------
From: "Emil Dular" <wd4scz at AOL.COM>

> 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?
 

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