Until you get your grounding issues corrected, you are wasting money on tower mounted preamps.

See MIL-HDBK-419 for information.

https://www.wbdg.org/ccb/FEDMIL/hdbk419a_vol1.pdf

https://www.wbdg.org/ccb/FEDMIL/hdbk419a_vol2.pdf

This is the two volumes.

Ensure that the tower is properly grounded to the service entrance ground. Eight foot ground rods every 16 feet bonded, 18" below grade with #2 copper.

73 Glenn WB4UIV Lightning mitigation in a previous job.

At 11:14 PM 6/14/2015, Nicholas Mahr wrote:

Hi All, I need two antenna mounted pre-amps, one for 70CM and one for 2M... We had outside preamps but they got hit my lightning long ago, all we have are preamps in the house. With that being said where you do you recemmend buying a very good antenna mounted preamp? I cannot really find anything anywhere that sells preamps anymore.

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--------------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@arrl.net AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" ---------------------------------------------------------------------------