Picture of 50's-60's Argonne AR-2 toy mini speaker / mic and transformer - Info?

[[email protected]]

Greetings all,

Would like some info about this mico-minature toy Argonne Speaker and
matching transformer. Argonne part number AR-2. See picture link
below. Speaker is completely encased in metal. Would assume it was
for kids in the 50's - 60's to build a minature transistor radio or
wireless microphone. Neat little combo. I would love to know more
info if anyone has an old catalog that shows this item or a old
circuit that uses it, please reply... Mainly I would like to know the
specs on the transformer. Looks like it has zillions of super tiny
windings on one side. Measures about 500 Ohms DC on that side. I did
not strip the enamel to measure the other winding.

Picture Here:

http://www.savepic.com/freepicturehosting/is.php?i=210132&img=Mvc-006s.jpg

Thanks for your help!

 

[Jeffrey D Angus]

Would like some info about this mico-minature toy Argonne Speaker and
matching transformer. Argonne part number AR-2. See picture link
below. Speaker is completely encased in metal. Would assume it was
for kids in the 50's - 60's to build a minature transistor radio or
wireless microphone. Neat little combo. I would love to know more
info if anyone has an old catalog that shows this item or a old
circuit that uses it, please reply... Mainly I would like to know the
specs on the transformer. Looks like it has zillions of super tiny
windings on one side. Measures about 500 Ohms DC on that side. I did
not strip the enamel to measure the other winding.

Picture Here:

http://www.savepic.com/freepicturehosting/is.php?i=210132&img=Mvc-006s.jpg

Thanks for your help!

Measure the DC resistance across the two terminals of the speaker.

Clean a little bit of the enamel off of the transformer leads. And
measure the DC resistance of that winding. I suspect that it will be
pretty low, and that it is the output (speaker) side of the transformer.

Use an audio source (signal generator, or a radio etc, with a fairly
steady tone and put a small amount across the enamel windings of the
transformer.

Measure the voltage (AC) across both sets of windings.

The turns ratio will be equal to the ratio of the two voltages.

The impedance ratio will be the square of the turns ratio.

As an example:

0.5 vac across the enamel and 5 vac across the red flexible leads.
5/0.5 = 10
The turns ratio is 10:1

If the speaker DC resistance is 4 ohms

(10)^2 = 100
The impedance ratio is 100:1
4 x 100 = 400

The primary (input) impedance is 400 ohms, the secondary (output)
impedance is 4 ohms.

Jeff

 

[t.hoehler]

Greetings all,

Would like some info about this mico-minature toy Argonne Speaker and
matching transformer. Argonne part number AR-2. See picture link
below. Speaker is completely encased in metal. Would assume it was
for kids in the 50's - 60's to build a minature transistor radio or
wireless microphone. Neat little combo. I would love to know more
info if anyone has an old catalog that shows this item or a old
circuit that uses it, please reply... Mainly I would like to know the
specs on the transformer. Looks like it has zillions of super tiny
windings on one side. Measures about 500 Ohms DC on that side. I did
not strip the enamel to measure the other winding.

Glad to see that it is a Permanent Speaker. 'Twould be a shame to buy it

and have it poof into thin air he he
I too would like to see an Argonne catalog from that era, I believe they
were the Philmore rack item discounters of the '50s.
I have a bunch of old NOS argonne transistor circut matching transformers,
probably 20 or so, still in the little plastic boxes. Some of them are 100k
to 6K input, really high impedance stuff, some 200 ohm CT to 8 ohm output
etc etc. I wonder if they would fetch anything on the 'bay?
regards,
Tom

 

[S-]

"t.hoehler" a écrit dans le message

I have a bunch of old NOS argonne transistor circut matching transformers,
probably 20 or so, still in the little plastic boxes. Some of them are 100k
to 6K input, really high impedance stuff, some 200 ohm CT to 8 ohm output
etc etc. I wonder if they would fetch anything on the 'bay?
regards,
Tom

Probably not much, But I'd be interested to buy one of each to complete
a project (output and interstage).

Syl

 

[t.hoehler]

"t.hoehler" a écrit dans le message


Probably not much, But I'd be interested to buy one of each to complete
a project (output and interstage).

Syl

I'll dig 'em out this weekend and let you know what the interstage and

output values are and you can see if they'll work.

Tom

 

[S-]

"t.hoehler" a écrit dans le message

output values are and you can see if they'll work.

Tom

Great, thanks.

Syl