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

Safe to powerup without Speaker?
#2

It's not a good idea to power a radio up without a speaker connected. The B+ will go high and possibly damage the filter capacitors. Also, the screen grid in the output tube will draw a large current and get red hot.

Steve 

M R Radios   C M Tubes


Messages In This Thread
Safe to powerup without Speaker? - by keith49vj3 - 12-25-2014, 05:00 PM
RE: Safe to powerup without Speaker? - by Steve Davis - 12-25-2014, 06:38 PM
RE: Safe to powerup without Speaker? - by David - 12-25-2014, 09:37 PM
RE: Safe to powerup without Speaker? - by OZ4 - 12-25-2014, 09:56 PM
RE: Safe to powerup without Speaker? - by morzh - 12-25-2014, 10:02 PM
RE: Safe to powerup without Speaker? - by morzh - 12-26-2014, 12:54 AM
RE: Safe to powerup without Speaker? - by joejoe - 12-27-2014, 12:36 AM
RE: Safe to powerup without Speaker? - by morzh - 12-27-2014, 05:14 PM
RE: Safe to powerup without Speaker? - by OZ4 - 12-27-2014, 05:22 PM
RE: Safe to powerup without Speaker? - by Warren - 12-27-2014, 06:11 PM
RE: Safe to powerup without Speaker? - by morzh - 12-28-2014, 05:14 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New Philco Repair Bench
Morzh is correct. The repair bench on our website is an archived image of chuck’s original site. He no longer provides s...klondike98 — 05:32 PM
Made mistake & did not label connection
Excellent information. It is all starting to come together now and your explanation really helped since I noticed that ...georgetownjohn — 04:39 PM
Made mistake & did not label connection
Hi John, I don't have this radio, but I can supply some info: Based on your pic, pins 7,8 and 1 are used together, go...MrFixr55 — 02:02 PM
New Philco Repair Bench
As far as I know, the Repairbench does not work, and has not been working in a while. Chuck (we had that campaign looki...morzh — 01:33 PM
Radio city products 664 schematic request
Need a schematic or manual for the 664. The 663 may be similar.daveone23 — 12:38 PM
New Philco Repair Bench
Thanks Gary.dconant — 12:16 PM
New Philco Repair Bench
I tried accessing the site through our library and got the same response. It's reported to our tech gurus. GaryGarySP — 11:50 AM
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM
Made mistake & did not label connection
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM

[-]
Who's Online
There are currently 4236 online users. [Complete List]
» 1 Member(s) | 4235 Guest(s)
Avatar

>