Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

Philco 38-3XX tube - shielded???
#1

I have a bit of a dilemma. The RF amp tube (a 6U7G) in my Philco 38-3XX console sits in a rather odd-looking socket base. THe socket itself is nothing out of the ordinary, but there is a piece riveted to the chassis that looks like a sort of short cylinder with two sides flattened out, and a hole in the top for the tube to go into. I presume that a shield is supposed to go over this cylinder, but it is the only thing of this type in the radio, and a standard round Philco tube shield is too big, and a Philco square shield is the wrong shape. Is a shield supposed to fit over this? It's at the lower left of the tuning condenser in this photo:

[Image: http://i294.photobucket.com/albums/mm100...744076.jpg]

If a shield IS supposed to fit over this, would someone PLEASE post a photo so I can send it to Mark Oppat at Old Radio Parts and get the RIGHT one? BOTH of us are getting a bit bewildered by this thing...
#2

That looks like it needs the cylindrical aluminum shield used in Philcos with the 6U7G RF amp.

[Image: http://philcoradio.com/phorum/attachment.php?aid=1864]
#3

you could use a round one but on mine it has a square one [just like the others] that sits at an angle to all the rest because the cap wire will not connect if it was turned like the others if it did it would short out david
#4

Mondial is correct - that base was meant for the cylindrical aluminum shield as shown in his photo. I do not know why Philco used this odd shield in certain 1938 models instead of the typical square shields Philco used during that time period.

--
Ron Ramirez
Ferdinand IN
#5

Thanks, all - that's a BIG help! Icon_smile
#6

In some Philcos, the use of this tube shield base also prevents the use of GT style tubes that have a slightly larger base than the G tubes do.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
#7

The photos were a HUGE help. I now have the correct tube shield. Thanks all!




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
schematics
Those filter caps in the cardboard tube are easy to restuff, especially the kind with the rolled over end. You don't hav...Arran — 09:56 PM
Philco Model 16 wiring question
If you have 5 wires, do this: The wires that go to thick-wire wound winding are the filament. If you do not know wha...morzh — 09:03 PM
Philco Model 16 wiring question
I recently acquired a Philco Model 16 Code 126. I removed the power transformer to place heat shrink on some very bad...bobclausen — 08:23 PM
1949 Motorola 5A9M
Hello Bob, That battery looks great nice job ! Sincerely Richardradiorich — 08:20 PM
1949 Motorola 5A9M
Yes, I plan to put a Velcro closer on the top.klondike98 — 07:28 PM
1949 Motorola 5A9M
Nice job on the battery, Bob. Can the box be opened to replace the 9 volters?RodB — 11:32 AM
Philco 46-1209 strange behavior
Thank you for the detailed response MrFixr. To clarify, the hum starts when the tubes are fully warmed up, and goes a...sq65 — 09:15 AM
Philco 46-1209 strange behavior
MrFixr The chassis, if there is no ground pin in the AC plug, due to the Y-caps from L/N to the chassis, is at 60VAC re...morzh — 08:47 AM
schematics
thanks I'll try the polar caps seperatelymseno — 07:38 AM
Philco 46-1209 strange behavior
Hi SQ55, A strange issue indeed!  Just so I have you straight, on a dim bulb you get normal operation after the set warm...MrFixr55 — 12:44 AM

[-]
Who's Online
There are currently 749 online users. [Complete List]
» 1 Member(s) | 748 Guest(s)
Avatar

>