[Johnson] [Boatanchors] Johnson Ranger VFO Access Question
WQ9E at btsnetworks.net
WQ9E at btsnetworks.net
Sun Dec 29 11:29:12 EST 2013
Carl,
I have been using the red Mobil 1 synthetic grease (same stuff I use for my pickup and tractor) for many years in the Johnson reduction drives and it seems to work fine. For a high torque application you would probably need a special grease. I imagine the original Johnson stuff is just run of the mill petroleum based.
Rodger WQ9E
-------- Original Message --------
> From: "Carl" <km1h at jeremy.mv.com>
> Sent: Sunday, December 29, 2013 10:00 AM
> To: "Whitebear1122" <whitebear1122 at comcast.net>, "boatanchors" <boatanchors at mailman.qth.net>, <johnson at mailman.qth.net>
> Subject: Re: [Johnson] [Boatanchors] Johnson Ranger VFO Access Question
>
> Be careful when working with verniers Scott. Many work by using the friction
> of the grease to provide sufficient torque. Flushing that out and going to a
> synthetic may limit its performance; ask me how I know...but it wasnt in a
> Johnson!
>
> Ive had better results with a 6AH6 VFO tube in most all 6AU6 VFO's of all
> brands. Depending upon the circuit the plate and screens use zeners of lower
> voltages that still allows a surplus of drive on 10M. The result is less
> drift and chirp.
>
> Carl
> KM1H
>
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