# 87405C Keysight Preamplifier New

**Features:**

-   4.5 dB noise figure and 25 dB gain helps improve the dynamic range and sensitivity of your test equipment
-   High 15 dBm P1dB increases available power from network and spectrum analyzers
-   DC Bias Volt/Amp: +15 V at 140 mA (nominal); -12.6V to -15V at 3mA (nominal)
-   Rugged, portable design for ease of use in the field
-   Probe-power bias connection eliminates the need for an additional power supply

Exceptional gain (25 dB) and flatness (±1.5 dB) combined with a probe-power bias connection which eliminates the need for an additional DC power supply, makes these preamplifiers the ideal choice for spectrum analyzer or stand alone applications.

## Details

- **Price:** 5291.0 USD
- **Vendor:** Keysight
- **Type:** Pre Amp
- **Tags:** Amplifier, Keysight, Keysight Technologies, Manufacturers, Other Equipment, Preamplifier, product_manual_group_3, Product_new

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 5291.00 USD | In stock |

## Images

- 87405C Keysight Technologies Preamplifier

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> Source: [ValueTronics](https://valuetronics.com/products/87405c-keysight-preamplifier-new)
> Updated: 2026-05-29