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38-690 Electronic Restoration
#18

I managed to fix the dial mechanism and stopped the rubbing between the dial and mask. I also lined up the dial properly and everything tracks good now.

I re-wired the tweeters per the fix listed here on the forum. Not only were the tweeters out of phase, but the OP transformer leads were reversed. Changing those made a big difference in the sound. Can't wait to get it in the cabinet to hear the true sound.

I am still working on the intermittent in the sub chassis. Seems to only happen as the set warms up within the first 5 min. The sensitivity drops off and then comes back. Normally a .75-1uV signal can be heard with the service monitor hooked directly, so I no the radio is up to snuff. I have swapped tubes around, but I need to dig out other ones from my stash. Work in progress, as I want this right before I call it done.

More to come.


Messages In This Thread
38-690 Electronic Restoration - by tbone - 11-08-2017, 08:49 AM
RE: 38-690 Electronic Restoration - by morzh - 11-08-2017, 09:30 AM
RE: 38-690 Electronic Restoration - by tbone - 11-08-2017, 03:32 PM
RE: 38-690 Electronic Restoration - by morzh - 11-08-2017, 03:52 PM
RE: 38-690 Electronic Restoration - by tbone - 12-10-2017, 04:29 PM
RE: 38-690 Electronic Restoration - by tbone - 12-10-2017, 05:31 PM
RE: 38-690 Electronic Restoration - by morzh - 12-10-2017, 06:10 PM
RE: 38-690 Electronic Restoration - by tbone - 12-10-2017, 07:04 PM
RE: 38-690 Electronic Restoration - by morzh - 12-10-2017, 07:33 PM
RE: 38-690 Electronic Restoration - by tbone - 12-10-2017, 09:57 PM
RE: 38-690 Electronic Restoration - by tbone - 12-11-2017, 01:16 PM
RE: 38-690 Electronic Restoration - by morzh - 12-13-2017, 10:59 PM
RE: 38-690 Electronic Restoration - by KCMike - 12-14-2017, 09:36 AM
RE: 38-690 Electronic Restoration - by morzh - 12-14-2017, 10:02 AM
RE: 38-690 Electronic Restoration - by tbone - 12-16-2017, 08:09 AM
RE: 38-690 Electronic Restoration - by tbone - 12-17-2017, 01:41 PM
RE: 38-690 Electronic Restoration - by tbone - 12-20-2017, 08:02 AM
RE: 38-690 Electronic Restoration - by tbone - 12-28-2017, 07:47 PM
RE: 38-690 Electronic Restoration - by morzh - 12-28-2017, 08:06 PM
RE: 38-690 Electronic Restoration - by tbone - 12-28-2017, 08:09 PM
RE: 38-690 Electronic Restoration - by morzh - 12-28-2017, 08:23 PM
RE: 38-690 Electronic Restoration - by tbone - 12-28-2017, 10:15 PM
RE: 38-690 Electronic Restoration - by tbone - 12-29-2017, 10:22 AM
RE: 38-690 Electronic Restoration - by morzh - 12-29-2017, 11:29 AM
RE: 38-690 Electronic Restoration - by tbone - 12-29-2017, 11:35 AM
RE: 38-690 Electronic Restoration - by morzh - 12-29-2017, 12:09 PM
RE: 38-690 Electronic Restoration - by tbone - 12-29-2017, 12:51 PM
RE: 38-690 Electronic Restoration - by tbone - 12-29-2017, 09:48 PM



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