1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
Model 650 Recap Success then ecap blows
Mondial
Phorum Expert
*****
Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY
#2

03-25-2016, 04:22 PM
Is it the 8 uF connected to the filament of the 80 rectifier or the one after the filter choke? I am assuming that the cap that blew was installed with the proper polarity.

The first 8 uF connected to the 80 sees a lot of ripple current and if it is not a high quality cap it may overheat and blow out. This radio has a high DC current draw and a poor grade cap may not be able to handle the load.
Find
« Next Oldest | Next Newest »


Messages In This Thread
RE: Model 650 Recap Success then ecap blows - by Mondial - 03-25-2016, 04:22 PM



Users browsing this thread: 4 Guest(s)
[-]
Recent Posts
Rusty Tuning Condenser
Thanks guys. I think I'll give the Naval Jelly a try since I can better control where it goes.dconant — 09:23 AM
Philco Model 80 Transformer resistance
Just forget this number, it is useless anyway. Simply proceed with your project.morzh — 10:08 PM
Philco Model 80 Transformer resistance
My $0.02 is that it is a misprint. I tried to look up the value for the similar 84 and 37-84, and ther is no resistance...MrFixr55 — 09:51 PM
Philco Model 80 Transformer resistance
Thanks for the quick reply! Hmm...well that's good, so what am I seeing that's 1042 ohms on the schematic for the pow...Mike L — 08:46 PM
Philco Model 80 Transformer resistance
The DC resistance of the primary is 8 to 9 Ohm.morzh — 07:54 PM
Philco Model 80 Transformer resistance
I have a feeling the primary winding on the power transformer is bad. My resistance reading on the primary side is 9 ohm...Mike L — 07:48 PM
Rusty Tuning Condenser
I would try Naval Jelly and use a soaked pipe cleaner to get it where it needs to go.RossH — 06:56 PM
38-10T chassis Restoration begins
Hello Dconant , they sold mica to use as a insulator between transistors and their heatsinks too. Rob I will remove th...radiorich — 02:52 PM
38-10T chassis Restoration begins
Thanks for the info guys. I always wondered why the use of mica. Now I know.dconant — 01:52 PM
38-10T chassis Restoration begins
Most common plastics have a dielectric constant in the 3-4 range whereas mica is around 6. This means that even if you w...Steve D — 01:46 PM

[-]
Who's Online
There are currently 4142 online users. [Complete List]
» 1 Member(s) | 4141 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration