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

40-195/200/201 Rotating Antenna Label
#6

After a closer look at the unit I found that there is a tear completely through a number of the wire strands embedded in the outer tube. It appears that there are individual wires that circle around the outer cover and are soldered to a long tinned copper foil strip that runs vertically close to the stitched seam in the outer cover. This tinned copper strip is in turn soldered to the black wire at the top. As I straightened the shape of the bent portions of the antenna assembly, the paper cracked every time I flexed it. It appears that the best way to repair this, after I get as much straightening as I can done, will be to reinforce the outer and inner walls using some brown paper similar to that used in brown paper grocery sacks. The fine wires in this outer paper shell are copper and look to be something on the order of n. 28AWG, which is pretty delicate to work with.

Does anyone know if this outer wire grid is supposed to be an electrostatic shield? I remember running into something like this on some Detrola Hotel pay-to-listen radios that also had rotatable antennas to minimize static electrical interference. I don't believe these wires are part of an actual coil, just a shield arrangement, because there does not appear to be any spiral or coiling involved from top to bottom, just curved to fit the oval shape of the outer cover.

Joe


Messages In This Thread
RE: 40-195/200/201 Rotating Antenna Label - by Joeztech - 12-07-2013, 03:02 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Refinishing Ideas
Thanks. I will look into. Billpoulsbobill — 11:23 AM
My Philco 37-116 Restore
Why do the flood lights have 2 wires running to the shell of each light when the inner conductor only has one to each? ...dconant — 10:54 AM
Philco 46-480 Electronic Restoration
OOPS!! if there is a "flag" running up the side of the tube that touches the shield, then yes, a shield belon...MrFixr55 — 10:03 AM
Philco 46-480 Electronic Restoration
Thanks for pointing out that shield! I will try to find out where else it may belong. I simply installed it back where i...jrblasde — 10:02 AM
Philco 46-480 Electronic Restoration
Very nice job. A real contrast between how easy the main chassis is to work on, vs how tightly the RF chassis is packed...MrFixr55 — 09:31 AM
Philco 46-480 Electronic Restoration
After sleeping on it, I believe the issue is that I may have forgotten to install a ground connection between the RF cha...jrblasde — 09:21 AM
Refinishing Ideas
Hi Poulsbobl, I think that you could get away with it.  In the Philco Library, there is a parts listand specs for sp...MrFixr55 — 11:54 PM
Philco 46-480 Electronic Restoration
The sleeving for the transformer arrived early, so I went ahead and finished reassembling. The chassis looks far better ...jrblasde — 10:15 PM
Philco 610B oscillator wiring
I don't know what you are referring to when you say "tube cathode ground". Ground is a connection to the chass...RodB — 05:56 PM
Zenith H725
Good points, Arran. I haven't encountered this problem with any other radio (all earlier vintages), so am learning here....EdHolland — 05:32 PM

[-]
Who's Online
There are currently 891 online users. [Complete List]
» 1 Member(s) | 890 Guest(s)
Avatar

>