[HBR] Re: GB> RSGB Keyer

[Mike McCarty]

EP Swynar wrote:
> Hi Again Everyone,

[...]

> Well, lo & behold, the doggone thing keys alright now, but with one problem:
> the ratio pot has to be nearly fully re-set in the OPPOSITE direction of the
> wiper's travel, in order to generate characters! In other words, if I want
> dots, I have to swing the wiper fully clockwise --- if I want dashes, I have
> to swing it fully counter-clockwise.

That sounds like misadjustment.

> Nothing happens if I don't do this, and attempt to key "...normally."

Umm, I'm confused. You have a key which closes one of two contacts.
One contact generates dits, the other dahs. Here's an adjustment
procedure.

Set the speed control to slowest.
Set the ratio control to midpoint, and adjust the weight control until
the on:off ratio is 1:1.
Adjust the ratio control until the dit:dah ratio is 1:3.
Adjust the speed control as desired.

> My initial reaction is that maybe the value of the pot for the ratio control
> I used was too large, thus, creating too great of a range between dots &
> dashes...but only further experimenting will confirm this thesis.

Whatever its absolute value, if it's set to midpoint, then the
dits and dahs should be equal in length.

> So far, what was SUPPOSED to have been a "fun" glowbug project, has instead,
> made me wax nostalgically for an old Curtis keyer chip (8044? 8044A...?) --- 

Usually, I have more fun with "debugging" than with just "building
and using".

Mike
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