Forums :: NEW! Web Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Nov Thu 26, 2020 12:58 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 6 posts ] 
Author Message
 Post subject: Columbia 360 Hatbox HELP!
PostPosted: Oct Wed 28, 2020 7:19 pm 
New Member

Joined: Oct Wed 28, 2020 7:06 pm
Posts: 2
Hi guys!
I recently got a BEAUTIFUL Columbia 360 phono and I'm in love with it.
I already put a lot of work in (replaces stylus, soldered wires, cleaned, sprayed etc) and I can't wrap my head around the reason why she's humming and the sound is not what it should be. I connected an external speaker via 1/4' cable and still no good :(
When I touch the 1/4' output jack the humming gets a little better. but more than anything, I'd like a clean output source to external speakers...

THOUGHTS?

Thanks so much!
Koala


Top
 Profile  
 
 Post subject: Re: Columbia 360 Hatbox HELP!
PostPosted: Oct Wed 28, 2020 10:36 pm 
Member

Joined: Jan Wed 30, 2019 3:44 am
Posts: 315
Location: Lake City, SC
Hi there-- You mention soldering wires but you don't mention replacing the electrolytic capacitors. There are some capacitors in old tube gear that go bad with time, and should always be replaced--the "hum" is 60hz line voltage humming, and your filter capacitors are supposed to get that out. Bad caps=bad sound quality.

I'm sure it will be a fine phonograph when you are finished, though. Can you post some pictures to show it off a little? All my phonographs are the old-fashioned sort with cranks, and if I want to see electric ones, I have to look at other peoples' restorations.


Top
 Profile  
 
 Post subject: Re: Columbia 360 Hatbox HELP!
PostPosted: Oct Thu 29, 2020 10:38 pm 
New Member

Joined: Oct Wed 28, 2020 7:06 pm
Posts: 2
Thanks VanEpsFan1914! Replacing caps is something I’ve never done so I’m gonna do some research and see if I’m ready for that :wink:
Posting some pics!


Attachments:
2FF4D3CF-DDFA-4A65-8420-93316522DD2F.jpeg
2FF4D3CF-DDFA-4A65-8420-93316522DD2F.jpeg [ 859.21 KiB | Viewed 238 times ]
623D9195-C68D-4987-B5F1-016FC8F26206.jpeg
623D9195-C68D-4987-B5F1-016FC8F26206.jpeg [ 2.97 MiB | Viewed 238 times ]
8817AB24-14F1-45CF-A19F-81A70838173E.jpeg
8817AB24-14F1-45CF-A19F-81A70838173E.jpeg [ 3.14 MiB | Viewed 238 times ]
C59F4B5D-0662-4FE8-869A-FF1874346088.jpeg
C59F4B5D-0662-4FE8-869A-FF1874346088.jpeg [ 3.13 MiB | Viewed 238 times ]
9A0CE0E5-C8B6-42A7-A0B4-C97B7F874CB4.jpeg
9A0CE0E5-C8B6-42A7-A0B4-C97B7F874CB4.jpeg [ 671.9 KiB | Viewed 238 times ]
Top
 Profile  
 
 Post subject: Re: Columbia 360 Hatbox HELP!
PostPosted: Oct Fri 30, 2020 6:11 am 
Member
User avatar

Joined: Apr Sun 01, 2012 9:55 pm
Posts: 11931
Location: Seattle, WA
The thing to remember about electrolytic capacitors is that they are polarized components. One lead is negative and the other positive. If you hook them up backward they will literally explode (with a loud and smelly bang than can send shrapnel around the room).

It's important to figure out how the caps are marked (usually an arrow points at the negative lead) and how they're shown on schematics (usually the curved side is the negative side), in order to get them installed correctly.

_________________
Rodney -- KG7EPW
Measure it with a micrometer, mark it with chalk, cut it with a chainsaw.


Top
 Profile  
 
 Post subject: Re: Columbia 360 Hatbox HELP!
PostPosted: Oct Fri 30, 2020 4:10 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 2033
Location: 77001
Welcome to the Phono Forum at ARF.

The Columbia model number and sometimes a circuit
schematic sticker was glued on underneath the cabinet.

Take a look there and post a photo of the label
if there is one.


There were several different amps for the Columbia 360s,
with different tube complements.
Some were push-pull, and others more simple SE.

Also recommend all wax coated paper capacitors
changed out, not just the electrolytics.

We have the circuit schematic for you,
when we know which amp you have in the 360.
Hotwax

Plus your capacitor tutorial:

http://www.wjoe.com/capacitorinfo.htm


Last edited by Hotwax on Oct Fri 30, 2020 7:34 pm, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Columbia 360 Hatbox HELP!
PostPosted: Oct Fri 30, 2020 4:37 pm 
Member
User avatar

Joined: Aug Tue 28, 2018 9:22 pm
Posts: 2642
Location: Sanford Fla 32771 (USA)
Just to chime in here, these are the electrolytics that are most certianly bad as they look original.
If you need help you will get step by step help here on ARF to replace these. The wax caps (small brown tubes) may need replacing also but maybe later.
If you do decide to do this yourself you will need to remove the chassis and provide better picture of the underside (and top side) of the chassis.
.
Just a suggestion, edit your profile to show your location (city/state) and sometimes help or offers is next door to you.


Attachments:
zzxUntitled.png
zzxUntitled.png [ 527.89 KiB | Viewed 160 times ]

_________________
Paul of Florida ….I had my patience tested. I’m negative.
https://paulsironhorse.smugmug.com/
Top
 Profile  
 
Post New Topic Post Reply  [ 6 posts ]  Moderator: Alan Voorhees

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 5 guests



Search for:
Jump to:  




































Privacy Policy :: Powered by phpBB