Model 20 speaker or model 70 ?

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Model 20 speaker or model 70 ?

Ron Ramirez
Silent Key

Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana

#7

12-08-2007, 04:23 PM

The primary impedance of the original output transformer was 6700 ohms per Philco data; secondary impedance 0.7 ohm.

Using these figures...the closest match you are going to get will be by connecting the speaker voice coil leads to either terminals 1 and 3 or 5 and 6.

Universal audio transformers do not offer exact matching of output to speaker voice coil; instead, they offer "close enough" matching to enable their use in many different radio receivers.

These transformers have six terminals for the secondary connection to your speaker voice coil. You will use the two terminals that most closely match the output load impedance to your speaker voice coil impedance.

Use whichever combination sounds the loudest and best: Terminals 1 and 3, or 5 and 6.

--
Ron Ramirez
Ferdinand IN

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Messages In This Thread

Model 20 speaker or model 70 ? - by Danny - 12-01-2007, 10:27 AM

[No subject] - by Ron Ramirez - 12-01-2007, 11:01 AM

[No subject] - by Steve Davis - 12-01-2007, 11:02 AM

[No subject] - by Danny - 12-01-2007, 01:02 PM

[No subject] - by Ron Ramirez - 12-02-2007, 12:37 AM

[No subject] - by Danny - 12-08-2007, 02:09 PM

[No subject] - by Ron Ramirez - 12-08-2007, 04:23 PM

[No subject] - by Danny - 12-09-2007, 04:27 PM

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