Buck,
The Heil Goldline mic is a dynamic type, last I heard it has an HC-5
element. It should have bias off.
The Elecraft MH4 is an electret type and must have bias set on - use
"FP.L bias"
It may just be that you have too much mic gain - start with a mid-range
setting. The mic preamp can shut down if it receivers too much signal.
Make sure there is nothing plugged into the rear mic jack - although MIC
SEL should allow you to switch from one to another.
If you are not successful, do you have one of the computer type
microphones? If so, plug it into the rear mic jack, set MIC SEL to
"RP.L bias" and see if you get any audio.
Have you made any changes to the Front Panel assembly where you removed
the DSP board? If so, there is one connector between the Front Panel
board and DSP board that if not mated properly will cause the front
panel audio to fail.
The TX DLY should have nothing to do with it. The KPA500 becomes active
with very little delay.
73,
Don W3FPR
On 3/16/2019 4:24 PM, Buck wrote:
Thanks. I was using a Heil Goldline and also tried an Elecraft MH4
plugged in the front. I get the same noise on FP.L and FP.H Bias is
off. And, I still get the noise even when in TEST mode, so there is
no RF.
I had the Tx Dly on the K3S set to 8. I set it to 15 and the problem
went away. Was I hitting the amp too soon? Amp is a KPA500.
Now the problem is back, even with the Tx Dly set to 20.
k4ia, Buck
K3# 101
Honor Roll 8B DXCC
EasyWayHamBooks.com
On 3/16/2019 3:41 PM, Don Wilhelm wrote:
Buck,
Which transceiver and which microphone?
If the K3, are you using the front panel mic jack or the jack in the
back?
How do you have MIC SEL set?
73,
Don W3FPR
On 3/16/2019 2:57 PM, Buck wrote:
I never use a microphone so here I am today trying to run voice in
the Va QSO party.
When I key the mic, I get a burst of noise that lasts maybe a half
second. It does this even if I have the rig in "test" mode ie. no
transmit. So, I don't think it is RF.
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