[Hallicrafters] HA-1 Keyer

[Roy Morgan]

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
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