Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

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



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently 1710 online users. [Complete List]
» 3 Member(s) | 1707 Guest(s)
AvatarAvatarAvatar

>