Yes, this is depending on how the PTT circuit is wired in the mike.
Some PTT circuits in the mike keep the mike element "live" thus it can be
used with VOX.
Other PTT circuits in the mike short or disconnect the mike element until
the PTT button is activated.
73
Bob, K4TAX
----- Original Message -----
From: "Brian Carling" <bcarling@cfl.rr.com>
To: "Clayton Brantley" <clayton_n4ev@yahoo.com>; "Discussion of Ten-Tec
Equipment" <tentec@contesting.com>
Sent: Friday, July 11, 2014 12:06 PM
Subject: Re: [TenTec] Omni VI & SignaLink USB
Seems like some of the mics do not present any audio out unless their PTT
button is activated...
Best regards - Bry Carling
On Jul 10, 2014, at 9:32 AM, Clayton Brantley via TenTec
<tentec@contesting.com> wrote:
Bob: The Omni VI+ manual does caution you that both the mike and the
rear audio connector are in
parallel and infers that you should remove the mike when using the rear
panel audio input. The manual
does caution you that the mike is still active and using digital modes
any noise the mike hears is also
transmitted
This is not from the "horse's mouth" but just from my reading the manual.
On Thursday, July 10, 2014 8:45 AM, Bob McGraw - K4TAX
<RMcGraw@Blomand.net> wrote:
I'm trying to assist a friend setting up his Omni VI with a SignaLink
USB. He does have the cable supplied from SignaLink and it seems to be
connected to the radio correctly. It receives and decodes PSK-31 very
satisfactorily and it keys the transmitter correctly.
The difficulty is having both the SignaLink connected to the Audio IN on
the rear and the microphone connected to the front at the same time. The
SignaLink appears to key the radio correctly but does not produce output.
When he then later and on a different frequency tries to transmit SSB
only white noise is heard. If he unplugs the cable to/from the SignaLink
the noise is not heard. This occurs when the SignaLink is off or on.
It appears from the schematic the mike input on the front and the rear
Audio In are each isolated by a 10K series resistor to a summing point at
the mike amp input. Using a low impedance {500 ohm} dynamic mike and the
SignaLink output being some 600 ohms, I calculate the isolation between
the two inputs would be some 35 dB or so. Certainly this would seem to be
very adequate isolation such that having the two connected, although the
SignaLink is off, it would not interfere with the use of the mike. And
with the SignaLink on it would produce audio and it would not be
interfered with the connected mike.
Anyone have any specific experience or thoughts on this configuration?
73
Bob, K4TAX
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|