Philco 91 Speaker Replacement

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Philco 91 Speaker Replacement

RodB
Phorum Expert

Posts: 977
Threads: 40
Joined: Feb 2015
City: Roseville, MN

#40

11-08-2024, 10:52 AM

It sounds like you measured your voice coil at 5.3 ohms. That would be a DC resistance. Impedances are calculated because they involve resistance at a certain frequency, usually 1000 hz for audio circuits. Your voice coil would probably be 6 ohms impedance. You use the output tube load impedance and speaker impedance to get the turns ratio for the transformer then use the chart to decide what secondary taps to connect to the speaker.

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Messages In This Thread

Philco 91 Speaker Replacement - by dconant - 10-28-2024, 06:54 PM

RE: Philco 91 Speaker Replacement - by morzh - 10-28-2024, 07:22 PM

RE: Philco 91 Speaker Replacement - by Brad Winder - 10-29-2024, 02:48 PM

RE: Philco 91 Speaker Replacement - by dconant - 10-29-2024, 02:52 PM

RE: Philco 91 Speaker Replacement - by morzh - 10-29-2024, 04:28 PM

RE: Philco 91 Speaker Replacement - by Arran - 10-30-2024, 02:18 AM

RE: Philco 91 Speaker Replacement - by morzh - 10-30-2024, 09:07 AM

RE: Philco 91 Speaker Replacement - by dconant - 10-30-2024, 09:27 AM

RE: Philco 91 Speaker Replacement - by morzh - 10-30-2024, 09:41 AM

RE: Philco 91 Speaker Replacement - by dconant - 10-30-2024, 11:14 AM

RE: Philco 91 Speaker Replacement - by dconant - 10-31-2024, 08:45 AM

RE: Philco 91 Speaker Replacement - by RodB - 10-31-2024, 09:02 AM

RE: Philco 91 Speaker Replacement - by morzh - 10-31-2024, 09:15 AM

RE: Philco 91 Speaker Replacement - by dconant - 10-31-2024, 09:34 AM

RE: Philco 91 Speaker Replacement - by morzh - 10-31-2024, 09:44 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-01-2024, 11:54 AM

RE: Philco 91 Speaker Replacement - by morzh - 11-01-2024, 12:02 PM

RE: Philco 91 Speaker Replacement - by dconant - 11-01-2024, 12:14 PM

RE: Philco 91 Speaker Replacement - by morzh - 11-01-2024, 12:16 PM

RE: Philco 91 Speaker Replacement - by Arran - 11-01-2024, 04:07 PM

RE: Philco 91 Speaker Replacement - by dconant - 11-01-2024, 04:26 PM

RE: Philco 91 Speaker Replacement - by RodB - 11-01-2024, 05:48 PM

RE: Philco 91 Speaker Replacement - by Arran - 11-01-2024, 08:11 PM

RE: Philco 91 Speaker Replacement - by RodB - 11-02-2024, 09:53 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-02-2024, 10:03 AM

RE: Philco 91 Speaker Replacement - by RodB - 11-02-2024, 11:16 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-02-2024, 11:23 AM

RE: Philco 91 Speaker Replacement - by RodB - 11-02-2024, 11:29 AM

RE: Philco 91 Speaker Replacement - by RodB - 11-02-2024, 11:36 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-02-2024, 11:56 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-03-2024, 01:04 PM

RE: Philco 91 Speaker Replacement - by RodB - 11-03-2024, 03:42 PM

RE: Philco 91 Speaker Replacement - by MrFixr55 - 11-03-2024, 10:43 PM

RE: Philco 91 Speaker Replacement - by dconant - 11-04-2024, 08:15 AM

RE: Philco 91 Speaker Replacement - by morzh - 11-04-2024, 10:48 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-07-2024, 07:10 PM

RE: Philco 91 Speaker Replacement - by morzh - 11-07-2024, 09:23 PM

RE: Philco 91 Speaker Replacement - by dconant - 11-08-2024, 08:59 AM

RE: Philco 91 Speaker Replacement - by morzh - 11-08-2024, 10:50 AM

RE: Philco 91 Speaker Replacement - by RodB - 11-08-2024, 10:52 AM

RE: Philco 91 Speaker Replacement - by morzh - 11-08-2024, 11:15 AM

RE: Philco 91 Speaker Replacement - by dconant - 11-08-2024, 01:14 PM

RE: Philco 91 Speaker Replacement - by morzh - 11-08-2024, 01:48 PM

RE: Philco 91 Speaker Replacement - by morzh - 11-08-2024, 01:54 PM

RE: Philco 91 Speaker Replacement - by dconant - 11-08-2024, 02:32 PM

RE: Philco 91 Speaker Replacement - by morzh - 11-08-2024, 03:32 PM

RE: Philco 91 Speaker Replacement - by dconant - 11-08-2024, 04:49 PM

RE: Philco 91 Speaker Replacement - by morzh - 11-08-2024, 08:53 PM

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