[AMRadio] RE: Testing Transmitting Tubes

Merz Donald S merz.ds at mellon.com
Wed Sep 22 17:22:06 EDT 2004

Yes, but there are practical issues. This is certainly not a speedy method. Changing tubes out of a working rig puts a good tube in jeopardy of a mis-handling accident. How are results interpreted for a single tube changed into a push-pull final? You have to keep a different transmitter around for each tube type that you want to test (hmmmm, maybe this is an advantage, not a disadvantage....). Etc. Etc.

I think a simple emission checker is more practical--certainly more flexible--and probably tells you just about everything you need to know. If you need to know more, THEN you put it n the rig.

73, Don Merz, N3RHT

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net]On Behalf Of Donald Chester
Sent: Tuesday, September 21, 2004 11:56 PM
To: amradio at mailman.qth.net; baswaplist at foothill.net;
glowbugs at piobaire.mines.uidaho.edu
Subject: RE: [AMRadio] RE: Testing Transmitting Tubes

I think the best method would be to try the tube in the final rf stage of a 
plate-modulated AM transmitter and see if it makes full power on modulation 
peaks, and shows good linearity on a trapezoid pattern.

FREE pop-up blocking with the new MSN Toolbar - get it now! 

AMRadio mailing list
Home: http://mailman.qth.net/mailman/listinfo/amradio
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:AMRadio at mailman.qth.net
The information contained in this e-mail may be confidential and is intended solely for the use of the named addressee.
Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized.
If you are not the intended recipient please notify us immediately by returning the e-mail to the originator.(A)

More information about the AMRadio mailing list

This page last updated 15 Dec 2017.