[VHFcontesting] Radios with T/R voltage on the coax

[Chet S]

Hi Dave,

I think you need widgets called a bias tee- Google on it. 

73
Chet, N8RA

-----Original Message-----
From: vhfcontesting-bounces at contesting.com
[mailto:vhfcontesting-bounces at contesting.com] On Behalf Of David Pruett
Sent: Thursday, January 21, 2010 7:51 PM
To: vhfcontesting at contesting.com
Subject: [VHFcontesting] Radios with T/R voltage on the coax

As I have been researching and trying to get my act together on 903 and
1296 MHz, I've seen references to radios which superimpose a positive
voltage on the output coax during transmit.  This voltage can be used for
T/R control of certain types of transverters.

This saves a relay keying cable if one wants to mount the tranverter near
the antenna to avoid feedline loss.  I recognize that the transverter must
be set up to utilize this voltage.

Although I've searched high and low, I've not been able to find any
references to radios which offer this useful capability.

Can anyone fill me in on which radios can be set up to do this?

Thanks in advance.

73, Dave/K8CC

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