UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Components and Circuits

Notices

Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

Closed Thread
 
Thread Tools
Old 19th Nov 2017, 11:45 pm   #1
Neil Purling
Nonode
 
Join Date: Jul 2005
Location: Hull, East Yorkshire, UK.
Posts: 2,083
Default Russian Bathtub Capacitor

I have these Russian bathtub capacitors.
They have 2 x 0.1uf sections in the same slim case. Is the centre terminal always the common terminal for both sections?
Neil Purling is offline  
Old 20th Nov 2017, 9:10 am   #2
Al (astral highway)
Dekatron
 
Al (astral highway)'s Avatar
 
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
Default Re: Russian Bathtub Capacitor

Photo please Neil? I use a lot of Russian kit!
__________________
Al
Al (astral highway) is offline  
Old 20th Nov 2017, 9:25 am   #3
Al (astral highway)
Dekatron
 
Al (astral highway)'s Avatar
 
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
Default Re: Russian Bathtub Capacitor

Double types have two insulated columns, one for each half of the , cap with a lug or other connector to the case, sounds like what you are saying?
__________________
Al
Al (astral highway) is offline  
Old 20th Nov 2017, 10:29 am   #4
Neil Purling
Nonode
 
Join Date: Jul 2005
Location: Hull, East Yorkshire, UK.
Posts: 2,083
Default Re: Russian Bathtub Capacitor

Not the same value of capacitor, but the same 2-in-1 type.
One would assume the case to be negative, but it is painted and there are three terminals
Attached Thumbnails
Click image for larger version

Name:	OMBG_2.jpg
Views:	175
Size:	6.1 KB
ID:	152556  

Last edited by Neil Purling; 20th Nov 2017 at 10:50 am.
Neil Purling is offline  
Old 20th Nov 2017, 11:54 am   #5
Al (astral highway)
Dekatron
 
Al (astral highway)'s Avatar
 
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
Default Re: Russian Bathtub Capacitor

Quote:
Originally Posted by Neil Purling View Post
One would assume the case to be negative, but it is painted and there are three terminals
Hey Neil,.

Higher resolution photo, please. I can just see a tiny thumbnail that won't expand.

I can read Cyrillic text so should be able to help!
__________________
Al
Al (astral highway) is offline  
Old 20th Nov 2017, 1:14 pm   #6
Dave Moll
Dekatron
 
Dave Moll's Avatar
 
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
Default Re: Russian Bathtub Capacitor

Although the thumbnail does expand (to about twice the size) for me, it's still too low-resolution to read the text - or even to see whether there is anything in Cyrillic (which I also read from my O Level days).
__________________
Mending is better than Ending (cf Brave New World by Aldous Huxley)
Dave Moll is offline  
Old 20th Nov 2017, 1:17 pm   #7
turretslug
Dekatron
 
turretslug's Avatar
 
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,385
Default Re: Russian Bathtub Capacitor

Do you have a device for measuring capacitance?- e.g. many DMMs. A few tests between terminals will give deductive pointers.
turretslug is offline  
Old 20th Nov 2017, 1:52 pm   #8
Al (astral highway)
Dekatron
 
Al (astral highway)'s Avatar
 
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
Default Re: Russian Bathtub Capacitor

Quote:
Originally Posted by turretslug View Post
Do you have a device for measuring capacitance?- e.g. many DMMs.
It should be easy for me to read definitively if the picture is higher res...
__________________
Al
Al (astral highway) is offline  
Old 20th Nov 2017, 2:22 pm   #9
ms660
Dekatron
 
ms660's Avatar
 
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
Default Re: Russian Bathtub Capacitor

2 x 0.5 mfd +-10%...?

Lawrence.
ms660 is offline  
Old 20th Nov 2017, 2:46 pm   #10
turretslug
Dekatron
 
turretslug's Avatar
 
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,385
Default Re: Russian Bathtub Capacitor

Thinking of the connection arrangement, rather than the actual value- i.e. if the measured outer-to-outer value was half the (either) outer-to-centre value, that would indeed imply centre common connection.

Don't know if the Russians stuck to a particular connection convention for multiple bathtubs, but the Americans certainly didn't, judging by the Scott RCH here! Some common to case, some isolated case, of the latter, some common to middle terminal, some to one end terminal. I suspect there was a specifying "recipe" to suit a particular physical circuit layout.
turretslug is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 1:48 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.