The characteristic impedance of the cable is of little importance at
audio frequencies. It is the capacitance that matters. If the circuit is
a low impedance one then the capacitance does not matter much either.
But in a high impedance circuit the capacitance becomes important.
73
Gary K4FMX
Mike Dorworth K4XM wrote:
50 ohms is 50 ohms, plus 20 pf per foot cap all are killers! Mike,K4XM
----- Original Message -----
Subject: Re: [AMRadio] RE: r390a, sx17, t4xb for sale
I have had a few reports of my audio not having a lot of highs,
even though I boost the mid and upper voice frequencies.
There is nothing to limit the highs in any of the rigs, other
than the mod iron, and even crappy mod iron will typically pass
high enough frequencies to sound good, and found the cord between
the mike preamp and the power amp was the problem.
It was a 15 foot piece of rg8m, the little coax, with phono
ends on it.
You would think something that works for RF service up into VHF
would be able to pass high audio frequencies, but no.
I wonder why it was so poor for audio, cutting stuff above
about 3000 cycles a lot????
Brett
N2DTS
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Brett Gazdzinski
Sent: Monday, January 12, 2004 11:13 AM
To: [email protected]
Subject: RE: [AMRadio] RE: r390a, sx17, t4xb for sale
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