With that amount of gain, I would assume they don't have to be low
noise, though they could be. That is, I assume they are designed for use
with an amplified antenna. [The noise margin should be set by the
antenna preamp, not an amp down stream.]
But then again, they would have to pass DC to the actual amplified
antenna, as well as work as a 10dB amp.
On 1/9/2012 7:38 PM, Magnus Danielson wrote:
On 01/10/2012 02:44 AM, Chris Albertson wrote:
I bought a pair of in-line Trimble amplifiers but I can't find any specs.
Anyone know the gain?
They are in a machined stainless steel box with two "N" connectors.
Trimble sells them bundled with a long antenna cable so that the amp (I
assume) compensates for the cable loss. I opened one up. I'm very sure
they are preamps intented for being in the antenna feed line.
I won these on ebay for $0.01 for the pair, $5.00 for shipping. The
seller
paid more than $5.01 for postage and lost money on the transaction. I
bought them because even if they were dead the cases are usfull. Now I
think I want to run one of them ahead of a passive splitter and have
multiple receivers on one antenna
The 4000SSI manual says it gives 30 m additional cable-reach on RG-213
and the L1 damping of RG-213 gives about 10 dB for 100 foot, so I'd
guess you have a 10 dB amplification in them.
Cheers,
Magnus
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