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


It is currently Apr Wed 23, 2014 11:15 am


All times are UTC [ DST ]



Post New Topic Post Reply  [ 7 posts ] 
Author Message
 Post subject: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: Apr Tue 23, 2013 4:01 pm 
New Member

Joined: Feb Wed 27, 2013 5:40 pm
Posts: 7
Hi All , I was just going through my cache of transistor radios and I came upon a very nice Sony 2F 23W... When I opened the battery compartment ( which is clean) I then rediscovered that this radio used Mallory RM640 or Eveready E640 or equivilent.. they are rated at 1.3 volts each and the radio requires three ( there originally was a small plastic "sleeve" to hold batteries in place which I dont have , light tape will secure them in place :))... Please, anyone know which modern day batteries could be substituted for these??? Thanks Jim B


http://www.radiomuseum.org/r/sony_2f_23w2f23.html


Top
 Profile  
 
 Post subject: Re: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: Apr Tue 23, 2013 4:15 pm 
Moderator

Joined: Jan Thu 01, 1970 1:00 am
Posts: 15495
Location: Utica, NY 13502 (USA)
A640 or LR52 will work. Here is one source but I don't know if it is the cheapest.

http://24hourbatteries.com/shop/rm640battery__440.html

Dave


Top
 Profile  
 
 Post subject: Re: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: Apr Tue 23, 2013 5:12 pm 
New Member

Joined: Feb Wed 27, 2013 5:40 pm
Posts: 7
Thanks Dave.. I found this source which is cheaper.. however is this battery ok to use??

http://www.batterytex.com/product/detai ... 40/v640alk


Top
 Profile  
 
 Post subject: Re: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: Apr Tue 23, 2013 9:48 pm 
Moderator

Joined: Jan Thu 01, 1970 1:00 am
Posts: 15495
Location: Utica, NY 13502 (USA)
Garloo57 wrote:

If I had a radio that uses those (which I probably do), I would use them. The teeny amount of voltage (.15 volts each) above the original will drop as the battery ages. The original mercury cells would supposedly keep their stated voltage up until the time they were ready to die.

Dave


Top
 Profile  
 
 Post subject: Re: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: May Wed 01, 2013 6:46 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 362
Location: N.E. Florida
This radio looks extremely difficult to work on because it is so small. All I get is a few milliamps draw and no sound. I have had this radio for years and this thread just reminded me of mine.

Does anyone have a schematic for this? I know...just replace the electrolytics. There is even a transisor hanging off the board at the end of the battery compartment.


Jay


Attachments:
2f23W.jpg
2f23W.jpg [ 152.94 KiB | Viewed 424 times ]
Top
 Profile  
 
 Post subject: Re: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: May Thu 02, 2013 6:44 pm 
Member
User avatar

Joined: Jun Tue 21, 2011 8:27 pm
Posts: 2819
Location: Virginia
jay1028 wrote:
Does anyone have a schematic for this?

Jay
http://elektrotanya.com/sony_2f-23w_sm.pdf/download.html
Doubt if this is any more difficult to work on compared to a standard transistor radio.
I've seen *much* smaller sets. -- Take your time and don't get in a hurry.

~ Mitch ~


Top
 Profile  
 
 Post subject: Re: Sony 2F 23W 9 Transistor AM/FM Battery
PostPosted: May Fri 03, 2013 12:59 am 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 362
Location: N.E. Florida
Thanks a lot Mitch for the link. I got it, but what a crazy site. All kinds of download buttons to get you to install toolbars and all kinds of different apps. Finally found the words:"Get Manual". Firefox wouldn't display Get Manual. Fortunately I have IE8 that I only use for such problems.

I tried to register but I failed the test. Only got one wrong but it is one too many with that guy.


Jay


Top
 Profile  
 
Post New Topic Post Reply  [ 7 posts ]  Moderator: Dave Doughty

All times are UTC [ DST ]


Who is online

Users browsing this forum: robk and 3 guests



Search for:
Jump to:  














Privacy Policy :: Powered by phpBB