On May 29, 2006, at 2:51 PM, Joe Subich, W4TV wrote:
>
> Jeff,
>
> Compare your step start (soft start) unit to the one by
> Harbach Electronics (www.harbachelectronics.com). Those
> instructions may help you get by (including the note that
> it is necessary to use different resistors on 120 volts!).
>
With the circuit at:
http://www.somis.org/D_a_01.jpg
the 2, step-start resistors are seriesed with 240vac and paralleled
with 120vac, so the need for different resistors is obviated.
> The generic "manual" is:
> http://www.harbachelectronics.com/pdffiles/ss-100.pdf
>
>
> 73,
>
> ... Joe, W4TV
>
>
>
>
>> -----Original Message-----
>> From: amps-bounces@contesting.com
>> [mailto:amps-bounces@contesting.com] On Behalf Of Jeff Strailey
>> Sent: Monday, May 29, 2006 2:12 AM
>> To: Amps@contesting.com
>> Subject: [Amps] More LK500
>>
>>
>> My problem with operating an LK500 following the change to
>> 120 Vac operation appears to be related to a step start mod
>> that was added at some time to the amplifier. Perhaps
>> someone has a schematic or other information regarding a step
>> start mod kit that was sold at some time for the LK500. It
>> is tempting to simply remove it and restore the AC input side
>> of the amplifier to it's original state but step start is
>> desirable if it can be made to work.
>>
>> Jeff K6TLA
>>
>>
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>
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R L MEASURES, AG6K. 805-386-3734
r@somis.org
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