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41-290

K7Sparky
Member

Posts: 61
Threads: 5
Joined: Mar 2014
City: Holiday TN

#15

04-03-2014, 04:47 PM

"An update on mine: Both XXL tubes - the 1st det. and osc. are bad. So I am looking for replacements.
A RF signal placed at the antenna terminal comes through loud and clear, so I am hoping that fresh tubes will solve the issue."

If the you are passing an on frequency RF signal through (say 1000KHz) when tuned around that frequency on the dial and Broadcast band then the LXX tubes are not that bad.

Try putting in 455 and peaking the IFs Modulate it if you can and hook an AC voltmeter to the empty terminal board screw (external speaker) on the back of the chassis

If you have the tuning cap out for cleaning (or not) shoot the bearings and center ground spring wiper with Deoxit before you slap it back in.

(This post was last modified: 04-03-2014, 04:51 PM by K7Sparky.)

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Messages In This Thread

41-290 - by Todd Kaser - 03-27-2014, 07:36 AM

RE: 41-290 - by Eric Adams - 03-27-2014, 08:44 AM

RE: 41-290 - by TA Forbes - 03-27-2014, 08:45 AM

RE: 41-290 - by Todd Kaser - 03-27-2014, 08:50 AM

RE: 41-290 - by Eric Adams - 03-27-2014, 09:02 AM

RE: 41-290 - by TA Forbes - 03-27-2014, 09:35 AM

RE: 41-290 - by Todd Kaser - 03-27-2014, 09:47 AM

RE: 41-290 - by Joeztech - 03-28-2014, 06:26 AM

RE: 41-290 - by klondike98 - 03-28-2014, 07:11 AM

RE: 41-290 - by TA Forbes - 03-28-2014, 08:59 AM

RE: 41-290 - by Todd Kaser - 03-28-2014, 09:56 AM

RE: 41-290 - by lenmiller - 03-30-2014, 11:40 AM

RE: 41-290 - by Todd Kaser - 03-31-2014, 06:54 AM

RE: 41-290 - by K7Sparky - 04-03-2014, 04:38 PM

RE: 41-290 - by K7Sparky - 04-03-2014, 04:47 PM

RE: 41-290 - by K7Sparky - 04-03-2014, 08:21 PM

RE: 41-290 - by Raleigh - 04-03-2014, 09:06 PM

RE: 41-290 - by K7Sparky - 04-04-2014, 09:30 AM

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