My ARR preamp uses RF sensing circuitry and a relay to switch itself out of the line when transmitting. It's good to 160 watts. I know that this isn't what you want but it seems to me that there is still a way to employ a sequencer with it for other applications. I got literature with it that stated as much, although I can't place my hands on it now. One thing I will mention is that if you wish to power an ARR preamp through the coax, you have specify this to them when you order it. They then install the necessary parts at the amp end. Otherwise it's designed to be powered seperately through a military spec. connector which they supply. Don't know if this helps but since I have your example brand of pre-amp I thought I'd chime in. 73, Michael, W4HIJ
At 11:35 PM 2/3/2007 +0000, [email protected] wrote:
I am considering my next station upgrade to be mast mounted preamp(s). I
prefer the NON R.F. switching type due to their general better performance/cost and leaving me the ability to run QRO is need be in the future.
My only experience is using a preamp with a transverter where there are
seperate RX and TX lines. Now I do fully understand that you cannot TX threw these devices. My radio DOES have the ability to send DC voltage threw the coax while recieving ( IC 820H ). Even tho the radio can do this, I just dont understand how it works or if I would still need to use a sequencer. And even at all that... how an ARR preamp ( example ) can pass any sort of RF. The only way I can see how it would work is if some sort of switch is inplace @ the antennas as well, the DC from the radio or sequencer switches the preamp IN place when RX'ing and OUT of place when TX'ing.
Now if this is indeed the case.. and im going to assume it is.. where
would I begin to look for a Coaxial Relay that can pass 1kw @ 432 / 144 mhz? Now I know your thinking HU? 1KW!!! This is not my intended power level for the sats.. dont worry.. its for ( in the future ) possibly trying some single or dual yagi EME.
-Steve Raas N2JDQ FN20vg