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Philco 37-640
#34

Since nobody seems to have a K-34 speaker that they wish to part with, I am going to do what I can to use what I have. I ordered an output transformer for push-pull, the primary impedance match may end up off with the 1.1ohm voice coil, but it is the best I can do, considering. This is what I ended up ordering  https://www.tubesandmore.com/products/tr...output-8-w      .  Today I fitted the new cone. Fortunately I had one, right size, basically. I did have to enlarge the center hole by about 1/16 inch all around, and take about 1/16 inch from the outer edges. The slope of the cone is perfect, as if it was made for this speaker. I glued up the voice coil / spider piece to the cone, and centered it in the basket and magnet section, but did not glue it, just screwed in the spider again, and let the Goop dry. This evening I removed it again, and replaced the wires to the voice coil. It was raining all day, and is supposed to rain more tomorrow, maybe even snow. As soon as the weather permits, I will drill out the big rivets holding the output transformer to the basket, and make a new mounting for the replacement transformer. Here are some pictures of the work so far:

[Image: https://66.media.tumblr.com/2a4d26aa56ef...15dce1.jpg]

[Image: https://66.media.tumblr.com/be7d83c06d1a...9f64f6.jpg]

[Image: https://66.media.tumblr.com/1f34ad4adf67...5e0a05.jpg]


Messages In This Thread
Philco 37-640 - by mikethedruid - 01-27-2020, 05:03 PM
RE: Philco 37-640 - by morzh - 01-27-2020, 05:23 PM
RE: Philco 37-640 - by mikethedruid - 01-27-2020, 06:10 PM
RE: Philco 37-640 - by mikethedruid - 01-27-2020, 09:44 PM
RE: Philco 37-640 - by truePhilco - 01-27-2020, 10:40 PM
RE: Philco 37-640 - by mikethedruid - 01-28-2020, 12:16 AM
RE: Philco 37-640 - by mikethedruid - 01-30-2020, 01:54 AM
RE: Philco 37-640 - by mikethedruid - 01-31-2020, 12:24 AM
RE: Philco 37-640 - by mikethedruid - 02-01-2020, 11:08 PM
RE: Philco 37-640 - by mikethedruid - 02-02-2020, 05:08 PM
RE: Philco 37-640 - by mikethedruid - 02-03-2020, 10:54 PM
RE: Philco 37-640 - by Jake Blake - 02-04-2020, 02:21 PM
RE: Philco 37-640 - by mikethedruid - 02-04-2020, 09:42 PM
RE: Philco 37-640 - by Steve Davis - 02-04-2020, 11:34 PM
RE: Philco 37-640 - by mikethedruid - 02-05-2020, 12:55 AM
RE: Philco 37-640 - by mikethedruid - 02-05-2020, 12:56 AM
RE: Philco 37-640 - by mikethedruid - 02-06-2020, 08:56 PM
RE: Philco 37-640 - by mikethedruid - 02-06-2020, 11:57 PM
RE: Philco 37-640 - by mikethedruid - 02-07-2020, 01:15 AM
RE: Philco 37-640 - by Jake Blake - 02-07-2020, 08:24 AM
RE: Philco 37-640 - by mikethedruid - 02-07-2020, 05:04 PM
RE: Philco 37-640 - by morzh - 02-07-2020, 05:25 PM
RE: Philco 37-640 - by mikethedruid - 02-09-2020, 03:12 PM
RE: Philco 37-640 - by mikethedruid - 02-11-2020, 01:28 AM
RE: Philco 37-640 - by mikethedruid - 02-11-2020, 11:18 PM
RE: Philco 37-640 - by Jake Blake - 02-11-2020, 11:36 PM
RE: Philco 37-640 - by Nathan Slingerland - 02-12-2020, 12:22 AM
RE: Philco 37-640 - by mikethedruid - 02-12-2020, 03:38 PM
RE: Philco 37-640 - by mikethedruid - 02-12-2020, 10:04 PM
RE: Philco 37-640 - by mikethedruid - 02-13-2020, 10:35 PM
RE: Philco 37-640 - by morzh - 02-13-2020, 10:57 PM
RE: Philco 37-640 - by mikethedruid - 02-13-2020, 11:12 PM
RE: Philco 37-640 - by mikethedruid - 02-13-2020, 11:33 PM
RE: Philco 37-640 - by mikethedruid - 02-18-2020, 09:57 PM
RE: Philco 37-640 - by Jake Blake - 02-18-2020, 11:31 PM
RE: Philco 37-640 - by Nathan Slingerland - 02-18-2020, 11:50 PM
RE: Philco 37-640 - by mikethedruid - 02-19-2020, 02:49 AM
RE: Philco 37-640 - by morzh - 02-19-2020, 09:03 AM
RE: Philco 37-640 - by mikethedruid - 02-20-2020, 05:12 PM
RE: Philco 37-640 - by rfeenstra - 02-20-2020, 07:56 PM
RE: Philco 37-640 - by mikethedruid - 02-20-2020, 08:39 PM
RE: Philco 37-640 - by mikethedruid - 02-22-2020, 07:32 PM
RE: Philco 37-640 - by Jake Blake - 02-22-2020, 07:50 PM
RE: Philco 37-640 - by rfeenstra - 02-22-2020, 09:09 PM
RE: Philco 37-640 - by mikethedruid - 03-06-2020, 07:15 PM
RE: Philco 37-640 - by mikethedruid - 03-07-2020, 04:23 PM
RE: Philco 37-640 - by Jake Blake - 03-07-2020, 08:44 PM
RE: Philco 37-640 - by mikethedruid - 03-09-2020, 08:59 PM
RE: Philco 37-640 - by rfeenstra - 03-09-2020, 09:19 PM



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