[ARC5] BC454

[Tom Elmore]

Dave, Rocking the tuning indicator as suggested didn't change anything.
Touching the signal generator to the top cap of the 12K8 produced quite a
bit of signal in the headphones. Going back to the antenna binding post
produced less than half of what I was hearing at the mixer. It appears the
problem might be in the RF amp. This is where I concentrate my efforts for
the moment.


-Tom / KA1NVZ


If my last has no effect, touch your antenna lead to the top cap of the
12K8.  Do you have loud signals that vary with the RF control?


-----Original Message-----
From: David Stinson [mailto:arc5 at ix.netcom.com] 
Sent: Sunday, November 24, 2013 3:36 AM
To: Tom Elmore; arc5 at mailman.qth.net
Subject: Re: [ARC5] BC454


----- Original Message ----- 

> While listening to my BC454 on 75 meters the 
> other evening the receiver seems to have lost its sensitivity...

Grip the tuning indicator dial (not the crank- the dial itself)
with you fingers and rock it a little back-and-forth,
up-and-down.  Do the signals come back intemittantly?
If so, you have either a bad solder joint that connects to
the cap or some place on the cap assembly itself has
gone Hi-Z, which is becoming quite common.
Also- grip the tops of the IF cans and the tubes
and give them a little "rock."

Give that a quick try and let us know.
73 Dave S.