If you look at the jumper configuration in Fig 2 & 3 of the Signalink
USB documentation, you can insert the capacitor, in place of the
jumper, between the MIC pin on JP1 and the corresponding Mic Input
terminal on JP1. A 0.1 mfd 50 V disk ceramic should be very
adequate. That will block the DC bias from the radio and keep it from
saturating the output transformer T2
The schematic is available at this link.
http://www.frenning.dk/OZ1PIF_HOMEPAGE/images/Tigertronics%20Signalink%20USB%20Schematic%20v1p2.pdf
73
Bob, K4TAX
On 6/8/2019 12:47 PM, Terry Basom wrote:
The SLMODKX3 jumper module for using the Signalink USB with a KX3 or KX2,
has a DC blocking capacitor built in.
Can anyone tell me where it is in the circuit and a value? It eliminates
turning off the mike bias in the menu when using the Signalink USB. I am
just using jumpers and would like to put in the capacitor to eliminate
having to turn off mike bias and having to remember to turn it back on.
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