[Boatanchors] SWAN

[Rob Atkinson]

you have to leave them on.

On weekends at least, the V10 stays on.  Takes a few hours to
completely settle down.

The first '50s VFO I ever got into was a WRL 755.  I looked around and
did the usual restoration changes, fixing up the power supply and so
on, and at some point noticed the wiring around the transformer was
wrong.  Someone had changed it so the filaments were always on if the
VFO was plugged in.  I didn't know any better so I put it back to the
way it was originally.  It wasn't until later I learned why that
modification was made, hi.

73

Rob
K5UJ

On Tue, Oct 27, 2015 at 6:20 PM, Ray, W4BYG <w4byg at att.net> wrote:
> To be fair, in the days of tube VFO's and receiver oscillators, almost all
> radios made only for the ham market drifted,  Some worse than others, but
> most of them necessitated you retune several times throughout a QSO.
>
> (You really haven't had a QSO in ham radio until you followed a Heathkit
> DX-100 with the Cuban chirp, all over the 20 meter CW band).
>
> The tubes generated heat which over time changed the ambient temperatures
> within the chassis and therefore the L-C circuits, etc.
>
> For most who couldn't afford the most expensive commercial class gear, they
> had to live with it.
> Ray, 62 years and counting as W4BYG