Old tubes

Thread Rating:

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

Linear Mode

Old tubes

Eliot Ness
Phorum Expert

Posts: 3,135
Threads: 54
Joined: Apr 2011
City: Lexington, KY

#12

06-17-2014, 07:35 AM

The ultimate test is using a tube in circuit, so it sounds like your 47's and doing fine. If you're not sure who tested them I wouldn't worry about the 400 and 1000 Mhos marked on them. While the Knight is a simple emission type tube tester, it sounds like they tested fairly close and in the good range.

The calibration of the Knight 600 is pretty simple and the manual is located here (600tube.pdf):

http://bama.edebris.com/manuals/knight/600tube/

Replace any caps and out of tolerance resistors and the calibration for your simple tester sounds pretty easy.

John KK4ZLF
Lexington, KY
"illegitimis non carborundum"

Find

« Next Oldest | Next Newest »

Messages In This Thread

Old tubes - by fields 100 - 06-13-2014, 06:06 AM

RE: Old tubes - by Eliot Ness - 06-13-2014, 09:04 AM

RE: Old tubes - by fields 100 - 06-13-2014, 09:47 AM

RE: Old tubes - by TA Forbes - 06-13-2014, 01:22 PM

RE: Old tubes - by Randy H. - 06-13-2014, 03:29 PM

RE: Old tubes - by fields 100 - 06-13-2014, 06:18 PM

RE: Old tubes - by Arran - 06-14-2014, 03:32 AM

RE: Old tubes - by Randy H. - 06-16-2014, 05:08 PM

RE: Old tubes - by Phlogiston - 06-16-2014, 07:42 PM

RE: Old tubes - by Phlogiston - 06-16-2014, 08:20 PM

RE: Old tubes - by fields 100 - 06-16-2014, 08:44 PM

RE: Old tubes - by Eliot Ness - 06-17-2014, 07:35 AM

RE: Old tubes - by codefox1 - 06-18-2014, 03:34 PM

RE: Old tubes - by Phlogiston - 06-18-2014, 03:40 PM

RE: Old tubes - by Tom Hamilton - 07-12-2014, 04:22 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
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
Made mistake & did not label connection
You'll have to forgive me, I am not sure what you mean. Can you explain what you are really saying. If anyone does not...georgetownjohn — 08:05 PM
Made mistake & did not label connection
Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM
Made mistake & did not label connection
Maybe this is starting to make some sense in my hard head. Is this why the wire in question was not in the great Ron Ra...georgetownjohn — 04:34 PM
Made mistake & did not label connection
I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line...RodB — 02:41 PM
Made mistake & did not label connection
What does the dotted line representing that surrounds the tube in the schematic?georgetownjohn — 02:17 PM
Made mistake & did not label connection
Hello John, I have been there either label got lost or was not labeled ! Sincerely Richardradiorich — 02:15 PM
Made mistake & did not label connection
Sorry, it is a Philco 37-640. Does that help?--Johngeorgetownjohn — 02:14 PM

Who's Online
There are currently no members online.

Login
Username:
Password:	Lost Password?
	Remember me