There's nothing to look for. All you're doing by increasing the value of R14 is increasing the amount of audio from the mic reaching the audio (speech compressor) chip.
It has the same effect as screaming into your mic, without all the noise or getting yourself hoarse <G>. Now, there is a *different* mod that apparently can have bad side effects by over-driving the balanced modulator at the output of the audio chip. That was to swap resistor R14 and R2. R2 is a 5.6 k resistor in the audio line between the speech compressor and the balanced modulator. Replacing it with the 1K from R14 helped increase the gain even more by increasing the drive to the balanced modulator. However, it was suggested that doing so might over-drive the balanced modulator. Ron AC7AC -----Original Message----- As an experiment, I'm going to try the KSB2 R14 mod (change value to something 5k to 10k). I have a couple of other irons in the fire that I will look at as well, but this one was quick and I had the parts. What negative effects should I watch for? I have a 100Mhz scope... anything I should be looking at with that? Bill W1PA K2/100 #61 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
