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 37-670 Shadow Meter Woes
#5

Well, the good news is I think I now know the problem.  After viewing the photos on the Phorum, it looks to me that the magnet is MISSING!  There is a shadow on the front of the coil that looks like perhaps something was there but no longer.  Even though it does not appear that the meter has been fooled with or opened.  Can someone confirm that this is the case?  Of course, if that is true, then I guess I will never have a functioning shadow meter.  Again, the symptom is that the shadow will not fill the screen (with no antenna connected), and when the voltage across the coil is varied, only the LEFT side of the shadow moves - the right side does not.  The coil is good, the set has been restored and aligned (at least on the first two bands) and the coil voltage varies between 6 and 15 volts.
   
There is also a chunk of the coil bobbin missing on the back of the coil, exposing the winding.  That, at least, appears fixable.  I guess my next move (if the missing magnet is confirmed) is a classified ad.


Messages In This Thread
Philco 37-670 Shadow Meter Woes - by davemc - 03-30-2016, 09:46 AM
RE: Philco 37-670 Shadow Meter Woes - I give up! - by davemc - 04-03-2016, 12:02 PM
RE: Philco 37-670 Shadow Meter Woes - by titan1a - 05-03-2016, 08:45 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT 6 chassis screws size???
Hello bridKarl, that sounds right or maybe 8/32 . Sincerely Richardradiorich — 01:00 AM
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM

[-]
Who's Online
There are currently 701 online users. [Complete List]
» 1 Member(s) | 700 Guest(s)
Avatar

>