With an A Line, I'd check to see if the problem is on all bands first. The
rotary switch contacts seem to more susceptible on the A-Line for some
reason (silver-plated?). If you're getting full output on some bands and
not on others, I'd check the switch contacts.
Steve Wedge, W1ES/4
Live free or die: Death is not the worst of evils.
John Stark.
All my computers have my signature with various pearls of wisdom appended
thereto.
--------------------------------------------------
From: <[email protected]>
Sent: Sunday, February 05, 2012 5:06 PM
To: <[email protected]>; <[email protected]>
Subject: Re: [Drakelist] sick T4X
Dale,
Are you getting any drive? All bands?
Preselector makes a peak?
Try diffent bands?
Can you hear the signal in a close by rcvr?
If so...does the plate tune make a diffence in the signal level?
All the tubes correct? and all glowing?
Move the band switch all the way through all bands 20 times.
We'll get her squared away for you...
Just a start...
73,
Lee
-----Original Message-----
From: yash <[email protected]>
To: drakelist <[email protected]>
Sent: Sun, Feb 5, 2012 4:50 pm
Subject: [Drakelist] sick T4X
I now have my R4A back ,thanks to Lee"s Kc9cdt, fine work its doing a
great job. Now the T4X, Rebuilt the supply AC-4 ,heath kit board, came out
fine. Fired up the T4x today,set the bias current then followed the tune
up procedure ,function switch to TUNE, advanced the gain to .15 amps ,
turned the plate control to dip the meter ..... nothing happens, meter
stays same. There is a TINY dip when the plate is turned fully clockwise
,but VERY small dip. Have not had the case off the t4x yet,but of course
the seller said it worked fine the last time he used it.
sure could use some guidance on this. only other facts, supply is 100% on
all voltages, t4x going into a dummy load and testing is done with the t4x
not connected to the r4a.
thanks
dale wt4t
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