Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Transistor Radio

Notices

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 10-19-2012, 12:19 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
Philco T45-124

I didn't expect to ever be posting in this forum, but I couldn't pass up on this nifty little Philco radio from 1959. It has four transistors and a detector diode.

Does anyone have service info for it ?







I sure hope those cool looking transistors are good
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #2  
Old 10-19-2012, 05:19 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
I found the schematic in Beitmans vol. 20. You can download all the Beitmans here for free http://makearadio.com/beitmans/index.php
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #3  
Old 10-19-2012, 06:43 PM
Sandy G's Avatar
Sandy G Sandy G is offline
Spiteful Old Cuss
 
Join Date: May 2003
Location: Rogersville, Tennessee
Posts: 9,571
Cyoot l'il feller...Bet it does, or will do, a real good job...
__________________
Benevolent Despot
Reply With Quote
  #4  
Old 10-19-2012, 06:46 PM
tvtimeisfun tvtimeisfun is offline
VideoKarma Member
 
Join Date: Nov 2011
Posts: 421
Hello neat little score on yhis radio I hope to post my new finds with photos soon I like this radio it beats anything on the market today...Timothy
Reply With Quote
  #5  
Old 10-19-2012, 06:55 PM
jgumphress jgumphress is offline
VideoKarma Member
 
Join Date: Apr 2011
Location: Mountain View, AR
Posts: 6
Great photos Bob. I just watched your un-boxing of this radio and it looks fantastic. These little radios are my true love.
Reply With Quote
Audiokarma
  #6  
Old 10-19-2012, 09:33 PM
wa2ise's Avatar
wa2ise wa2ise is offline
VideoKarma Member
 
Join Date: Dec 2002
Location: USA
Posts: 3,147
Quote:
Originally Posted by bandersen View Post

I sure hope those cool looking transistors are good
Just like tube radios, it's usually the electrolytic caps that need to be replaced. They tend to dry out and lose capacitance. The transistors are likely good.
__________________
Reply With Quote
  #7  
Old 10-19-2012, 09:44 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
Quote:
Originally Posted by wa2ise View Post
... The transistors are likely good.
That's what I was hoping to hear

I've seen early transistors before but they looked more like these. I guess they were European or Japanese.

__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #8  
Old 10-20-2012, 09:24 AM
dieseljeep dieseljeep is offline
VideoKarma Member
 
Join Date: Jul 2010
Posts: 7,562
Quote:
Originally Posted by bandersen View Post
That's what I was hoping to hear

I've seen early transistors before but they looked more like these. I guess they were European or Japanese.

Those are genuine Philco transistors. They made their own at the time.
I have one of those heavy front, early 60's GE AM-FM portables, that uses Philco transistors in the IF stages. They must've been better.
I think their semiconductor plant was phased out, when Ford started restructuring.
Reply With Quote
  #9  
Old 10-20-2012, 10:38 AM
dieseljeep dieseljeep is offline
VideoKarma Member
 
Join Date: Jul 2010
Posts: 7,562
Quote:
Originally Posted by bandersen View Post
I found the schematic in Beitmans vol. 20. You can download all the Beitmans here for free http://makearadio.com/beitmans/index.php
I just looked up the schematic in Beitmans. I shows two different codes. Code 126 shows jedec type numbers and code 124 shows the Philco types.
The print shows some kind of a reflex circuit for the second IF.
Also, the transistor was rather critical in that circuit.
Reply With Quote
  #10  
Old 10-28-2012, 01:21 AM
radiodayz's Avatar
radiodayz radiodayz is offline
radiodayz
 
Join Date: May 2010
Location: Seattle WA USA
Posts: 120
Looks like that set has a pretty long ferrite antenna. Bet it will hear a lot of stations once you get it going.
__________________
I have one of those around here, somewhere
Reply With Quote
Audiokarma
  #11  
Old 10-28-2012, 12:20 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
I hope to find out soon. New caps arrive Tuesday
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #12  
Old 10-30-2012, 01:01 PM
dieseljeep dieseljeep is offline
VideoKarma Member
 
Join Date: Jul 2010
Posts: 7,562
Quote:
Originally Posted by bandersen View Post
I hope to find out soon. New caps arrive Tuesday
It should be interesting to see how well it performs after restoration.
Reply With Quote
  #13  
Old 11-04-2012, 12:22 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
Last night I decided to tackle this little radio. The biggest challenge turning out to be just getting the darn PCB out of the cabinet!

I had to carefully pry loose two tri-mount fasteners on the speaker side and unsolder a few wires going to the speaker and battery terminals before I could work it loose.




Most of the electrolytics are completely shot. This should measure 5uF not 216 pF!


Here it is recapped. I popped in some fresh AA batteries and t works just fine Next up I'll do a little alignment.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery

Last edited by bandersen; 11-04-2012 at 12:26 PM.
Reply With Quote
  #14  
Old 11-04-2012, 03:25 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
I finished the alignment and found the the 1st two IF coils were dead on, but the 3rd was pretty far off. Even so it was performing fairly well and is even better now

I went over the cabinet with a little Novus #2 and am calling this project done

__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #15  
Old 11-04-2012, 03:36 PM
Reece's Avatar
Reece Reece is offline
VideoKarma Member
 
Join Date: Jul 2004
Location: Cleona, PA
Posts: 2,178
Cute! And it looks like new.
__________________
Reece

Perfection is hard to reach with a screwdriver.
Reply With Quote
Audiokarma
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:04 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.