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
No Signal withOut scope probe
BrendaAnnD
Phorum Expert
*****
Posts: 1,108
Threads: 89
Joined: Jun 2011
City: Tacoma State, Province, Country: Washington
#6

09-06-2013, 11:32 PM
It sounds to me like an open coil in the antenna circuit somewhere. Regardless of whether the generator is connected to the antenna clip, it sounds like what is happening is that when you connect your scope to the grid cap of the 1C6, you are supplying a sort of "antenna" which is then picking up the generator. Check your coils, especially the RF coil and the IF trap coil as Morzh mentioned.
Find
« Next Oldest | Next Newest »


Messages In This Thread
No Signal withOut scope probe - by marty - 09-06-2013, 07:23 PM
RE: No Signal withOut scope probe - by keithw - 09-06-2013, 08:52 PM
RE: No Signal withOut scope probe - by morzh - 09-06-2013, 08:55 PM
RE: No Signal withOut scope probe - by marty - 09-06-2013, 09:28 PM
RE: No Signal withOut scope probe - by morzh - 09-06-2013, 10:14 PM
RE: No Signal withOut scope probe - by BrendaAnnD - 09-06-2013, 11:32 PM
RE: No Signal withOut scope probe - by marty - 09-06-2013, 11:36 PM
RE: No Signal withOut scope probe - by marty - 09-07-2013, 09:58 AM
RE: No Signal withOut scope probe - by morzh - 09-07-2013, 01:21 PM
RE: No Signal withOut scope probe - by marty - 09-07-2013, 02:33 PM



Users browsing this thread: 7 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
Usually a wave trap is for keeping IF signals from entering the antenna and from leaving the antenna. You feed an IF sig...RodB — 09:30 PM
Philco 60 Squealing
I just peaked it for the best signal at 600. NULL it for IF frequency, originally it would have been null for 500kh...Chas — 08:05 PM
Philco 60 Squealing
Wavetrap no longer matters.morzh — 05:19 PM
Philco 60 Squealing
Rod, I had checked out your suggestions but did not help. I did solder the ground rivets to the chassis as Chas suggeste...dconant — 04:52 PM
37-690 Bass Choke Replacement
Yeah, I know, Mouser and Digikey don't have "big iron" components. For some reason Philco was messing with the...Radiodial — 04:25 PM
37-690 Bass Choke Replacement
Yes, I just had to deal with that while repairing the 37-604 Philco. Exactly that value choke was gone. And the current ...morzh — 03:52 PM
37-690 Bass Choke Replacement
Ah, now where to find one. I've into this before on smaller sets, I now recall. Hammond makes one that is only rated...Radiodial — 03:27 PM
Philco 38-7 Speaker
Ask the admins to put them together. As for the renaming, while inside the thread, you simply press "New reply&quo...morzh — 02:23 PM
37-690 Bass Choke Replacement
This is the parts catalog. 32-7528 choke is 65H, 10mA, 2,250 Ohm inductance. Find a suitable one.morzh — 02:18 PM
37-690 Bass Choke Replacement
While troubleshooting the no bass amplification issue, I think I found the culprit. The choke #104 is reading 164K ohms....Radiodial — 01:42 PM

[-]
Who's Online
There are currently 3283 online users. [Complete List]
» 1 Member(s) | 3282 Guest(s)
Avatar

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