Jon --
>>>Because it can be VERY inconvenient to have to fire up the amp each time
>>>you are trying different capacitor values and finding out you have the
>>>wrong one!
>>
>>? Use compression trimmers, a 5.5uH Collins Radio Co. 208T roller coil
>>($10 from Fair Radio Sales), and you can not have the wrong one. When
>>the swr is delightsome, stop, measure the values, and substitute fixed
>>ones.
>
>This is a fine idea, provided one has an LC meter that can accurately read
>the values.
? With a dipmeter, an assortment of std inductors and capacitors, and
a calculator, one can easily measure L and C. .
> Some of us don't have the luxury of a full lab worth of
>equipment and have to be able to practically make do with whatever we can.
> Now some might criticize those of us who don't have a full complement and
>say that we shouldn't be doing PA projects w/o them but that's the way
>life is.
>
>IMHO, a GDO isn't accurate enough to properly calculate the values of L's
>and C' when doing input networks.
? My TS440S reads frequency within 10Hz.
>
>>>Simulations are done in companies all across the world every day. They
>>>tell us a lot about real world conditions w/o the pain of experiencing
>>>those conditions. So why not use it? You can play safely in the amp
>>>compartment in a passive manner - w/o all the pesky voltages being turned
>>>on!
>>>
>>? The high V is usually on the top side of the chassis.
>
>True. Although some folks might have the hookups for their filament
>transformer on the underside. That could expose one to either 110 or 240 V.
>
? 120v is quite lethal because victims typically can not let go. 240v
exists only if one grabs L1 and L2.
>
- later, Jon
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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