No Signal withOut scope probe

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

No Signal withOut scope probe

morzh
Odobenus rosmarus

Posts: 15,832
Threads: 554
Joined: Oct 2011
City: Jackson, NJ

09-06-2013, 08:55 PM

Marty

Check the integrity of the connection between the G4 (1C6 grid cap) and 3 and 7 caps.

You introduce about 10pF of capacitance with your scope. This may be enough if the other caps are disconnected.

Keith: where do you see gridleak res. in the 1st 1C6?

(This post was last modified: 09-06-2013, 08:56 PM by morzh.)

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

View a Printable Version

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 3783 online users. [Complete List]
» 1 Member(s) | 3782 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me