Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

37-350 Hot chassis
#4

Hi Pat

Okay, now that we're clear on what's going on... Icon_smile

Remember, a capacitor blocks DC but passes AC current. Nearly all Philco chassis are slightly "hot" due to the AC line bypasses used in them. And why you will see a slight spark when you connect a ground wire to the GND terminal. Terribly simplified, yes, but I apologize as I don't really have time to elaborate - I'm sure Chuck or someone will jump and and elaborate further. Anyway, this is why I use new X-Y units at .008 uF instead of .015. Most of us today have agreed that for safety's sake, you really shouldn't use anything larger than .01 uF as an AC line bypass due to the leakage current increasing with larger values of capacitance.

If you were to test further you would find that the voltage may be 73 VAC but the current would be very minimal. Remember, it is current that kills!

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
37-350 Hot chassis - by planigan - 06-02-2006, 12:37 PM
[No subject] - by Ron Ramirez - 06-02-2006, 01:33 PM
[No subject] - by planigan - 06-03-2006, 12:32 AM
[No subject] - by Ron Ramirez - 06-03-2006, 01:03 PM
37-650 - by planigan - 06-03-2006, 08:30 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM
Made mistake & did not label connection
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM
Made mistake & did not label connection
You'll have to forgive me, I am not sure what you mean.  Can you explain what you are really saying.  If anyone does not...georgetownjohn — 08:05 PM
Made mistake & did not label connection
Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM
Made mistake & did not label connection
Maybe this is starting to make some sense in my hard head.  Is this why the wire in question was not in the great Ron Ra...georgetownjohn — 04:34 PM
Made mistake & did not label connection
I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line...RodB — 02:41 PM
Made mistake & did not label connection
What does the dotted line representing that surrounds the tube in the schematic?georgetownjohn — 02:17 PM
Made mistake & did not label connection
Hello John, I have been there either label got lost or was not labeled ! Sincerely Richardradiorich — 02:15 PM
Made mistake & did not label connection
Sorry, it is a Philco 37-640.  Does that help?--Johngeorgetownjohn — 02:14 PM

[-]
Who's Online
There are currently no members online.

>