Steve,
I think I've done 4 re-builds now. On each one I've needed to carefully
select the number of washers which space off the plastic spring housing
at the back of the PTO; they determine how much pressure is applied to
the shaft assembly : too few washers and it all feels very stiff, too
many and the vernier slips. I don't always get it right first time -
what "feels right" when the PTO is out of the radio never seems quite
the same when it's back in the radio and been used for a bit! In one
case I used combinations of TT's washers and some thinner ones to get it
just how I wanted.
I keep meaning to see if I can make that spacing "screwdriver adjustable".
It's not an easy adjustment to make with the PTO in the radio ..... and
of course this may not be your problem anyway :)
73,
Steve G3TXQ
On 06/09/2011 03:05, Steve Berg wrote:
I had the factory rebuild both PTOs in my Corsair II and the external
VFO last year. The one in the rig has settled down, but the one in the
external VFO is acting up. It is still stiff, and has a lot of slop
when trying to tune it slowly. I noticed this weekend, that the dial
skirt moves at the same rate as the tuning knob. So, apparently there
is minimal vernier reduction going on. Before I send it back, is there
a fix for this that I can do myself without disassembling the PTO itself?
Thanks!
Steve WA9JML
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