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37-630 speaker
Ron Ramirez
Silent Key
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Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana
#5

09-05-2013, 06:10 PM
The 610, 620 and 630 used a single ended 42 output tube.

The 37-610, 37-620 and 37-630 used a single ended 6F6G output tube.

42 and 6F6G have the same characteristics; the 6F6 is the octal version of the 42.

The output transformer may have a different part number, but the impedance should be the same.
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Ron Ramirez
Ferdinand IN
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Messages In This Thread
37-630 speaker - by murf - 09-04-2013, 10:21 AM
RE: 37-630 speaker - by Radioroslyn - 09-04-2013, 10:26 PM
RE: 37-630 speaker - by murf - 09-04-2013, 11:15 PM
RE: 37-630 speaker - by Radioroslyn - 09-05-2013, 06:36 AM
RE: 37-630 speaker - by Ron Ramirez - 09-05-2013, 06:10 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration