Model 20

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Model 20

morzh
Odobenus rosmarus

Posts: 16,194
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Joined: Oct 2011
City: Jackson State, Province, Country: NJ

01-09-2014, 12:09 AM

Greg

The best way to see what you can hear is to unsolder the output transformer's output from the voice coil, take a regular PM speaker and solder it to the transformer's output. The lowest possible voice coile impedance speaker is the best choice, as the impedance of Philco speaker is 0.7 Ohm and most speakers today are 4 or 8 Ohm which is an order of magnitude. It will still sound OK. So you could see if the speaker could be improved.

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Messages In This Thread

Model 20 - by gregb - 01-07-2014, 12:06 PM

RE: Model 20 - by Mondial - 01-07-2014, 04:46 PM

RE: Model 20 - by gregb - 01-07-2014, 05:24 PM

RE: Model 20 - by gregb - 01-08-2014, 07:08 PM

RE: Model 20 - by Mondial - 01-08-2014, 10:13 PM

RE: Model 20 - by gregb - 01-08-2014, 10:55 PM

RE: Model 20 - by gregb - 01-08-2014, 11:46 PM

RE: Model 20 - by morzh - 01-09-2014, 12:05 AM

RE: Model 20 - by morzh - 01-09-2014, 12:09 AM

RE: Model 20 - by gregb - 01-09-2014, 12:18 AM

RE: Model 20 - by morzh - 01-09-2014, 12:17 PM

RE: Model 20 - by gregb - 01-09-2014, 02:15 PM

RE: Model 20 - by morzh - 01-09-2014, 03:33 PM

RE: Model 20 - by gregb - 01-09-2014, 03:44 PM

RE: Model 20 - by gregb - 01-09-2014, 03:46 PM

RE: Model 20 - by morzh - 01-09-2014, 07:04 PM

RE: Model 20 - by gregb - 01-11-2014, 12:57 AM

RE: Model 20 - by morzh - 01-11-2014, 11:30 AM

RE: Model 20 - by BrendaAnnD - 01-11-2014, 06:07 PM

RE: Model 20 - by morzh - 01-11-2014, 06:51 PM

RE: Model 20 - by gregb - 01-11-2014, 09:40 PM

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