[WRL] 755A VFO and other matters.

[Jim Wilhite]

Good idea to check all the grounds Ken, also clean the bandswitch 
contacts and be sure they are tight.  I have 2 A models and one 755 and 
one of them had a problem with the bandswitch.  You can tell by turning 
it on and wiggling the switch.  If it warbles in a receiver, then the 
contacts are giving trouble.

Check the variable cap to be sure the rotor is making good contact.

73

Jim/W5JO


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



>I have a WRL-755A VFO which was given to me some time ago.
>
> It arrived all in one piece and in pretty good condition. The screws 
> holding the
> chassis into the cabinet had been removed, as also had two of the four
> screws holding the box on top of the chassis. There was a note 
> attached to
> the top warning that the chassis was loose.
>
> In any case, several years later (yesterday) I fired it up and 
> examined it pretty
> closely.
>
> Quite obviously, the reason the previous owner had opened it up is 
> because
> the VFO is very unstable. It acts as though something is not making 
> good
> contact somewhere.
>
> I have examined the thing fairly closely, and by now I suspect that 
> the riveted
> tube sockets and ground connections are not making good contact. I am
> thinking about getting out my big soldering iron and soldering all 
> those
> directly to the steel chassis.
>
> Once, after peening one of the rivets, the VFO remained on and steady 
> for
> over an hour.
>
> Has anyone else experienced anything similar to this? if so, what was 
> your
> solution?
>
> Someone loaned me a 755 VFO about 60 years ago, and I thought it was
> wonderful.
>
> This one is somewhat less so, dang it. I would like to use this with a 
> DX-35
> (my first transmitter in 1956) in the next CX, but I would much prefer 
> it to
> work properly.
>
> The only other VFO I have always wanted was a WRL V-10.
>
>
> Ken Gordon W7EKB
>