Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: Contributors :: Advertise


It is currently Jun Mon 18, 2018 6:12 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 9 posts ] 
Author Message
 Post subject: Silvertone 4586 issues
PostPosted: Feb Tue 20, 2018 11:01 pm 
Member

Joined: Jan Wed 11, 2012 4:21 pm
Posts: 690
Location: Elko, MN.55020
Hello again fella's,
Brought home a nice Silvertone 4586 last weekend.
Started out as usual with a visual inspection and cleaning.
Tested and replaced bad tubes.replaced rubber insulators under tuning capacitor.
Re-capped and checked cadohm resistor.
Looked for any open resistors or crunchy wires.
Hooked up variac and brought slowly.
Have very slight audio with very weak signal pick up.
Something is wrong in the audio section for sure.
Will check voltages tonight.
Also cleaned and lubricated all switches.
Anyone have any suggestion ?
Silvertone put together a very complete set of schematics for this radio.
Has lots of diagrams and lots of info not normally given.
Even has a troubleshooting section.
Love the gold dial.
murf


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Feb Thu 22, 2018 2:46 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 7928
Location: Cleona, PA
Check the part number of your chassis. There are two versions. The one using a 6H6 was made by Stewart Warner for Sears and the chassis number will have the prefix 100. The other version uses a 6Q7 and was made by Colonial, with prefix 101. There should be a sticker on the chassis. With this information you can find the right schematic. The speaker must be connected before trying to operate the set or check voltages. Once you check voltages in the audio section, and they seem OK, a length of insulated wire touched to the grid of the first audio ought to give you a healthy hum in the speaker if audio is OK.

_________________
Reece


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Feb Fri 23, 2018 12:49 am 
Member

Joined: Jan Wed 11, 2012 4:21 pm
Posts: 690
Location: Elko, MN.55020
Yes I am aware of that.
Noticed on the very complete schematics that they also make note of a bad coil on the police band that will shut the radio down.
Murf


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Feb Sat 24, 2018 1:34 pm 
Member

Joined: May Wed 27, 2009 5:24 pm
Posts: 152
Location: n9842 n birch rd, tomahawk, wisconsin, 54487
I have a very clean 4586 colonial chassis and speaker complete with original packet owners manual materials. I will be listing on monday in the classified section for trade. Just have to figure out how to upload pics. Never did it before.


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Feb Sat 24, 2018 3:04 pm 
Member
User avatar

Joined: Jan Tue 31, 2012 1:55 am
Posts: 4171
Location: Mountains of Mourne. Ireland.
Posting photos to a forum thread.
The skinny: viewtopic.php?p=2717120#p2717120

Greg.


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Feb Sun 25, 2018 9:55 pm 
Member

Joined: Jan Wed 11, 2012 4:21 pm
Posts: 690
Location: Elko, MN.55020
Seems that I have minimal plate voltage to one of the 6f6 tubes that is causing problems with the audio.
I believe that is pin 3.
Gonna have to try to trace it bback to the source.
murf


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Mar Wed 07, 2018 11:13 pm 
Member

Joined: Jan Wed 11, 2012 4:21 pm
Posts: 690
Location: Elko, MN.55020
Had a friend of mine diagnose this chassis and he believes the output tranny is bad.
Any idea what the specs are on this 6f6 push/pull output transformer?
Difficult job to tackle?
murf


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Mar Wed 07, 2018 11:40 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 12568
When dealing with PP output, it's a given if plate voltage is missing on one output, transformer is the issue...

Specs for various output tubes are included here

http://www.radioremembered.org/outimp.htm

_________________
Tom


Top
 Profile  
 
 Post subject: Re: Silvertone 4586 issues
PostPosted: Mar Wed 14, 2018 11:15 pm 
Member

Joined: Jan Wed 11, 2012 4:21 pm
Posts: 690
Location: Elko, MN.55020
Needed tranny showed up today, but will not have time to look at it as I will be vacationing in AZ for a week.
Have to do it when I return.
murf


Top
 Profile  
 
Post New Topic Post Reply  [ 9 posts ]  Moderators: Marcc, Norm Leal

All times are UTC [ DST ]


Who is online

Users browsing this forum: Ray P and 17 guests



Search for:
Jump to:  
























Privacy Policy :: Powered by phpBB