[Hallicrafters] HA-1 Keyer

[K2DP]

OM's,

A comment from my experience with TO keyer is that the "hold" position has
always been set up on a timed circuit and is not a "constant" on position.

73,
Dave, K2DP
ST. Louis
----- Original Message ----- 
From: "Roy Morgan" <roy.morgan at nist.gov>
To: "Bill Gerhold" <wpgerhold at elongo.com>; <hallicrafters at mailman.qth.net>
Sent: Thursday, September 25, 2003 11:10 AM
Subject: Re: [Hallicrafters] HA-1 Keyer


> At 02:12 PM 6/20/03 -0400, you wrote:
> >I know, I'm lazy.  I have not had time to look in the manual on this
> >keyer but, here's what's happening.
> >
> >First of all, it seems to work ok.  There is however, one function,
> >the "Hold" function that is working like this.
> >
> >** Switching to the HOLD function, sends a continuous sidetone for about
> >10-15 seconds. After this time interval it stops the sidetone
>
>
> Bill,
>
> Here are some things you should test/look into:
>
> 1) Check the operation of the VR tubes
> 2) Note that the mercury relay must be upright to operate properly
> 3) ALL paper caps are suspect of being leaky. Repeat ALL
> 4) All resistors should be checked for having changed in value, especially
> the speed-determining ones in the multivibrator.
> 5) Substitute a new known good 12AU7 or better yet a 5963 computer rated
> equivalent for the multivibrator tube.
>
>
> Let us know what you find.
>
> Roy
>
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
> roy.morgan at nist.gov --
>
> _______________________________________________
> List Administrator: Duane Fischer, W8DBF **for assistance**
> dfischer at usol.com
> ----
> Hallicrafters Collectors International: http://www.w9wze.org
> ----
> http://mailman.qth.net/mailman/listinfo/hallicrafters
>