Well, do not yet have the MH-31 but I can tell you that the plain Yaesu
MH-67A8J hand mike also has tones in the audio passband when I key up.
This is the FT-450 mike and does not have any DTMF buttons.
Still looking locally for the MH-31.
73, tom n4zpt
On 7/24/2010 12:37 PM, Tom Azlin, N4ZPT wrote:
Thanks Graham. Yep, when I switch to my Heil boomset it works fine now
that I have the right adapter. So will see if I can find a MH-31.
73, tom n4zpt
On 7/23/2010 5:10 PM, Graham Haddock wrote:
Tom:
Likely the same problem as reported on the Traveler Headset.
Powered Microphones seem to have the problem. If you unplug your
mike, the problem will go away.
The Heil "Traveler" headset uses a powered microphone, that picks up
noise through the microphone power. All other Heil mikes are pure
dynamic mikes without an amplifier, and sound great on the FLEX-1500.
(Just don't put a Heil Traveler adapter on any other Heil mike, or
the noise will come back.)
The Yaesu MH-31 mike without the touchtone pad is reported to work
quite well.
I suspect the "TouchTone" oscillator in your mike is taking power up
the microphone hot side conductor and picking up some power supply
noise.
--- Graham / KE9H
==
On Thu, Jul 22, 2010 at 8:45 PM, Tom Azlin N4ZPT<[email protected]>
wrote:
Hi.
I have my new Flex1500 up and working. Used it on a local 10 net
tonight and all copied me fine.
I do have one oddity. When I key the radio in SSB (have not checked
AM or FM) I have a 1KHz tone transmitted plus harmonics. When I
talk my voice power covers up that tone. I can see it in the
spectrum display and others can hear the tones when I pause.
I am running WinXP on my Thinkpad T400, linear power supply, VAC is
off, using head phones, a Yaesu mike (with the DTMF buttons).
External tuner and VSWR is about 1.5:1. see about 1-2 watts out
with the drive settings.
Any ideas on what is causing this? Is this the same as reported in
Bug Bug ID 2975??? I do not have another mike. Have an adapter for
one of my Heil boomsets coming in a couple days.
73, tom n4zpt
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