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Concert Grand Alert
#17

Ron Ramirez Wrote:
Miquelonbrad Wrote:I "reformed" the caps by slowly ramping up the voltage over several hours, and the radio does work, but it will require a tune-up. But that should be easy, as I don't think the chassis has been messed with. Very clean! Tubes still have the dealer decals on them, that match the dealer decal pasted on the back.

That radio did not use electrolytics, all of the caps in the large metal filter can are paper. Paper caps cannot be reformed.

Watch out! Paper caps can and will fail, also, with equally disastrous results. I once had a 96 that still worked, and so I played it...until one day I turned it on, I heard a loud hum and then smoke. Yup...shorted filter which took out the power transformer.

You really, really should replace ALL of the paper caps in that radio if you plan on using it. That is a fine piece of furniture and deserves no less.

I also plan on no less for my somewhat less Grand Philco 96 lowboy, I don't trust condensers that border on 80 years of age, nor resistors either. I had the same thing happen with a Radiola 44, worked but very weakly, tried it a year later and took out the rectifier tube, transformer and chokes are still alright fortunately.
Happy Christmas
Happy New Year
Arran


Messages In This Thread
Concert Grand Alert - by Ron Ramirez - 11-15-2008, 03:04 PM
Re: Concert Grand Alert - by Texasrocker - 11-15-2008, 11:37 PM
Re: Concert Grand Alert - by Ron Ramirez - 11-16-2008, 12:03 AM
Re: Concert Grand Alert - by FStephenMasek - 11-16-2008, 12:39 AM
Re: Concert Grand Alert - by Texasrocker - 11-16-2008, 01:51 AM
Re: Concert Grand Alert - by Ron Ramirez - 11-16-2008, 03:26 PM
Re: Concert Grand Alert - by Ron Ramirez - 11-18-2008, 09:16 PM
Re: Concert Grand Alert - by Texasrocker - 11-20-2008, 03:07 AM
Re: Concert Grand Alert - by DeckApe - 11-20-2008, 01:43 PM
Re: Concert Grand Alert - by Guest - 12-26-2008, 12:47 AM
Re: Concert Grand Alert - by Ron Ramirez - 12-26-2008, 12:44 PM
Re: Concert Grand Alert - by Guest - 12-31-2008, 12:01 AM
Re: Concert Grand Alert - by Arran - 12-31-2008, 12:45 AM
Re: Concert Grand Alert - by Ron Ramirez - 12-31-2008, 05:51 AM
Re: Concert Grand Alert - by Bill Cahill - 12-31-2008, 07:48 PM
Re: Concert Grand Alert - by Texasrocker - 12-31-2008, 11:32 PM
Re: Concert Grand Alert - by Arran - 01-01-2009, 02:24 AM
Re: Concert Grand Alert - by Guest - 01-05-2009, 09:28 PM
Re: Concert Grand Alert - by Ron Ramirez - 01-05-2009, 10:12 PM
Re: Concert Grand Alert - by Arran - 01-05-2009, 10:17 PM



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