I got my 5000 Monday. I have everything working fb and last night, during
the opening, I installed a new P50VDG preamp.
I use a 3 el SteppIR with 6 meter passive element with about 75 feet of RG
213 to the shack.
The gain jumped 24 db, like it should and I adjusted the gain control to
compensate.
I must say I don't see any difference with the preamp in or out on weak
signal reception.
I compared the 5000 with and without the preamp to my PRO3 and other than
higher S meter readings on the
PRO3 with preamp2 activated there wasnt a single signal I could not hear
equally well on the 5000A without any
preamp.
I have been using preamps for many years on the sats 2.4ghz, 440 and 2
meters. Mast mount and in shack.
I would really like to see someone with good test equipment give an
assessment of the value of a preamp on the 5000A.
Thanks,
Mike WA8EBM
----- Original Message -----
From: "Gary Carter" <[email protected]>
To: "Flexradio" <[email protected]>
Sent: Friday, July 10, 2009 4:05 PM
Subject: [Flexradio] 6 Meter Preamp Settings
Purchased an Advanced Receiver Research model P50VDG preamp for my Flex
5000A and just installed it today. Using two 3' RG59 75 ohm patch cables
to connect the preamp in the RX1 loop. I read the KB article on the
antenna setup for using the RX1 loop and have that setup per the
instructions, but I want to pass this by the group to make sure I have all
my other settings correct. Of course I have the RX1 loop enabled, but I
also have the preamp controls for 6 meters enabled and the preamp (Power
SDR) turned off. Since the gain of the P50VDG is listed as 24 dB I have
the gain box in the antenna selection window set at 24 dB, and the AGC-T I
left set at 110. Does this appear to be correct? The external preamp is
working fine, I'm just a little concerned seeing the noise floor on the
panadapter drop so significantly. I want to make sure my receiver S meter
readings continue to be accurate.
73, Gary - WA4IAM
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