From: Garey Barrell 
Subject: Re: [drakelist] T-4XB troubles


Garey Barrell  made an utterence to the drakelist gang
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Greg -

Sounds like bias supply failure in the AC-4.  Most likely electrolytic 
capacitor failure.

Good troubleshooting article at

http://www89405.temp.w1.com/DrakeArticles/TechTips/PowerSupplyTroubleshooting.htm>

73, Garey - K4OAH
Atlanta

CleophusA1{at}wmconnect.com wrote:

> *Hey all, I am new to the group, and would like to start off by 
> picking the collective brain :-)) I am having trouble with my T-4XB. I 
> was working CW with it the other day when all of a sudden, it shot a 
> fuse. I changed out the fuse and started it back up. The new fuse 
> didn't blow, but when the set warms up, and the tubes start to 
> conduct, the TX/RX relay kicks in and the plate meter starts to show a 
> lot of plate current, around .25 to .3 on the meter. The transmitter 
> won't tune, won't key, won't do anything except light up. I did a 
> visual check underneath, and nothing is obviously burned. or out of 
> place. I thought it may be the 6EV7 tube associated with the relay, 
> but I have no way of testing the one in the set, or any of the others 
> I got with it.  Anyway, I thought this may be a common problem 
> associated with this particular set and decided to put the problem in 
> front of the all knowing ones of the famous Drake list! Anybody got 
> any ideas?
>
> 73's
>
> Greg Gifford / KG4MMY*

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