sweet smell of sucess-hw101

[Gary Schafer]

Mike

Take the if transformer apart. It shouldn't be hard to fix. Not that many turns on it.
As for the carrier balance, you need to put a small cap on one side or the other of the
balanced modulator.

73
Gary  K4FMX

mike bryce wrote:

> boys and girls--keepers of the green
>
> sucess!
>
> after much looking and poking I found the trouble  to my 101. thought I
> would pass on the fix if case someone else gets into this spot
>
> the whine in transmitt was found to be a fubar tube in the speech amplifier.
> It tested good, and the one that I switched did the same thing. A NOS tube
> fixed that problem.  I found that the -65 volts would only be -12 with the
> odd ball tube.
>
> The dead transmitter took more time..
>
> trace the problem down to no output from the isolation stage. That in turn
> turned out to be a open T1 transformer on the modulator board. I've never
> ever seen a open IF transformer before in all my years of smelling solder
> fumes.
>
> I stole one out of a parts rig I had. New used IF transformer fixed the
> problem..
>
> So, this begs the question...
>
> Where can I get a new transformer IT's heath part number 52-79
> Anyone have a junker modulator board from a 101 they want to part with?
>
> AND now a question for the group..
>
> I've run the carrier null CONTROL all the way into its stop before I see any
> carrier drop.
>
> the carrier Capacitor does very little.
>
> any ideas????
>
> Mike Bryce
> SunLight Energy Systems
> "Electricity at the speed of light"
>
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