[time-nuts] Trimble GPS antenna preamp, anyone know the gain?
magnus at rubidium.dyndns.org
Tue Jan 10 03:38:25 UTC 2012
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.
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