speaker question. - Printable Version

+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: speaker question. (/showthread.php?tid=18181)

---

speaker question. - sumnerplace - 03-31-2018

Does anyone know if the speaker from a 70 and 71 are the same? I am strictly talking about cathedrals. 
Thanks.

---

RE: speaker question. - Radioroslyn - 03-31-2018

The 20,70,and 90 used several alliterations of the K speaker (sometimes called a pie pan speaker). It sports a painted brown or coated gray basket. The 71 uses a later K speaker that should work but ascetically is different. The 71 speaker may be hardwired in without a 4 pin plug. Ron would know better than I.
Early https://www.worthpoint.com/worthopedia/speaker-philco-model-20-70-90-tube-132420086
Later https://antiqueradio.org/philc08.htm

---

RE: speaker question. - Ron Ramirez - 03-31-2018

Nope, the 71B used a K-7 speaker which has an 1125 ohm field coil. 20, 70 and 90 cathedral speakers all have 3100 ohm field coils.

more info here:
http://www.philcoradio.com/phorum/showthread.php?tid=215

Scroll down to, and download speakers.zip which was made in and intended for Microsoft Excel but also works in LibreOffice Calc and OpenOffice Calc.

---

RE: speaker question. - sumnerplace - 03-31-2018

thanks guys that answers it...

---