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Model 90B Tinkerer
#16

Well Mike; no.58 started crackling and sparking smoke and flames after 3 hrs, so I did what you said and subbed with 10w 3.5K.

Now it runs perfectly.  This thing picks up a lot of stations, even on a 20' pc. of wire! 

Oh yeah, I found the source of big RFI in the house; it was the Keurig coffee maker!!  I now keep it unplugged until I need it.  There is still other interference, but nothing like that little jamming machine!!

But, back to the action;
Rebuilt Tone Control
   

I removed the Tuning Capacitor, and installed 2 pc. Grommets that I 3-D printed at work.  here are the glued-in upper halves.
   

Here are the grommet upper and lower halves before installation. Still using the little metal tube like original.
   

Tuning Cap went into the dishwasher after removing the mica caps; I took note of the turns before removing
   

Long story short, all the bakelites are rebuilt, resisters replaced, electrolytics, bypass, and filter caps rebuilt.  This picture is before the BC resistor flamed out and I installed the aforementioned 10w unit.
   

I will put in a wanted ad for a missing Sprague Electrolytic unit (for show only), and somebody owes me a tube shield so I can align this rascal (not putting any heat on you, bob Icon_smile
So thats it for time being.
Simon


Messages In This Thread
Model 90B Tinkerer - by Simon Wa3uay - 11-17-2021, 01:58 PM
RE: Model 90B Tinkerer - by Bob Andersen - 11-17-2021, 09:25 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-18-2021, 12:43 PM
RE: Model 90B Tinkerer - by Bob Andersen - 11-18-2021, 05:12 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-19-2021, 03:07 PM
RE: Model 90B Tinkerer - by radiorich - 11-20-2021, 11:50 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-20-2021, 12:31 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-24-2021, 03:11 PM
RE: Model 90B Tinkerer - by morzh - 11-24-2021, 04:02 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-25-2021, 08:58 AM
RE: Model 90B Tinkerer - by cknob - 11-25-2021, 09:43 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-25-2021, 09:58 AM
RE: Model 90B Tinkerer - by cknob - 11-25-2021, 12:25 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 11-27-2021, 08:40 AM
RE: Model 90B Tinkerer - by morzh - 11-27-2021, 01:48 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-14-2022, 12:18 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-16-2022, 10:37 AM
RE: Model 90B Tinkerer - by Mondial - 01-16-2022, 12:22 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-21-2022, 10:25 AM
RE: Model 90B Tinkerer - by Mondial - 01-21-2022, 10:39 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-21-2022, 03:06 PM
RE: Model 90B Tinkerer - by klondike98 - 01-22-2022, 12:26 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-22-2022, 01:35 PM
RE: Model 90B Tinkerer - by Ron Ramirez - 01-22-2022, 01:58 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-23-2022, 10:32 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 01-26-2022, 08:09 AM
RE: Model 90B Tinkerer - by Mondial - 01-26-2022, 10:38 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-01-2022, 12:39 PM
RE: Model 90B Tinkerer - by Mondial - 02-01-2022, 01:12 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-01-2022, 01:23 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-01-2022, 02:09 PM
RE: Model 90B Tinkerer - by Mondial - 02-01-2022, 08:31 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 01:32 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 01:39 PM
RE: Model 90B Tinkerer - by Bob Andersen - 02-09-2022, 01:48 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 01:53 PM
RE: Model 90B Tinkerer - by GarySP - 02-09-2022, 01:57 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 02:13 PM
RE: Model 90B Tinkerer - by Mondial - 02-09-2022, 02:36 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 02:41 PM
RE: Model 90B Tinkerer - by Steve Davis - 02-09-2022, 03:20 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-09-2022, 03:33 PM
RE: Model 90B Tinkerer - by Steve Davis - 02-09-2022, 04:40 PM
RE: Model 90B Tinkerer - by Ron Ramirez - 02-09-2022, 07:51 PM
RE: Model 90B Tinkerer - by Simon Wa3uay - 02-11-2022, 07:08 AM
RE: Model 90B Tinkerer - by Simon Wa3uay - 08-06-2022, 02:40 PM



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