Excellent points.
Can one obtain replacement gripper springs ?
----- Original Message -----
From: "Phil Chambley, Sr." <k4dpk@comcast.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, December 12, 2005 8:19 PM
Subject: Re: [TenTec] Centurion
> Re 3-500Z problems....Johnson 275 and similar sockets:
>
> I2R losses due to poor contact between filament pins and socket grippers
> result in melting solder out of the pins.
> This, no doubt, caused many tubes to be discarded before it became known
how
> to correct the problem.
>
> The same heat that melts the solder causes the gripper spring to lose its
> temper, so the gripper doesn't squeeze the pin as tight. If this isn't
> corrected, the problem will simply recur.
>
> After repairing the tube pin, I swap the gripper springs from one of the
> grids to the offending filament gripper on the socket. Squeeze them both
> tight before installing, and make sure the grippers are all cleaned. I
use
> a .22 caliber bore brush.
>
> 73
> Phil K4DPK
>
> VFO Stabilizers and other gadgets www.k4dpk.com
>
>
> ----- Original Message -----
> From: "Lyle Dunlap" <lyle3dd@grics.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Monday, December 12, 2005 11:00 AM
> Subject: Re: [TenTec] Centurion
>
>
> > Gary,
> >
> > Good suggestion about socket pin friction or tightness. When the 3-400Z
> > tube first came out, quite some time before the 500Z . The recommended
> > socket at the time was made from plastic. The fil. connections became
> very
> > weak and I had to use an "amp Clamp"
> >
> > Lyle W9FCX
> >
> >
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> >
>
>
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