PROJECT PATH
An rf amplifier broadband request is a project decision before it is a price. LinkScope Sourcing 32 is an independent sourcing partner. The desk asks what the span must cover, where the chassis will sit, and which documents travel with the quotation. It does not design the link and it does not hold broadband modules.
A narrow brick can quote one gain number. A broadband stage needs the window across the frequency range, for example plus or minus 1.5 dB from 20 MHz to 500 MHz if that is the buyer span. Ask for the plot points, not a single mid-band dot.
Saturated power and P1dB can fall at the band edges. Write the frequency where the watt figure applies. 100 W at mid-band is not evidence of 100 W at the stop frequency. Transmit power and gain are separate rows.
VSWR and return loss should be stated across the same span. A 1.5:1 mid-band figure can degrade near the edges. Impedance remains 50 ohm unless the buyer writes another value. Connector choice still follows the power and the mating hardware.
A lab bench, a broadcast rack, and an outdoor cabinet do not share airflow or ingress protection. Mounting in rack units, supply voltage, and whether a fan is allowed are site lines. Polarization and radiation pattern stay on the antenna line.
| Dimension | Integrated rack chassis | Pallet plus external heatsink | Refurbished broadcast unit |
|---|---|---|---|
| Power basis | Often a nameplate continuous or PEP figure inside the chassis. | Flange power that still needs the heatsink thermal resistance. | Nameplate may describe the original service, not the remaining capability. |
| Cooling | Fans and airflow may be inside the quotation. | Buyer must confirm cubic feet per minute or a thermal path. | Fan hours and filter condition need a statement. |
| Connector | Rear-panel series and gender are visible on the drawing. | A flange or a flying lead may replace a panel connector. | Connector wear and mating cycles should be stated. |
| Evidence | Current datasheet and a test row at the band edges. | Pallet datasheet plus the heatsink it was measured on. | Condition report, hours, and any remaining warranty months. |
| Delivered scope | May include rack rails and a supply. | Usually excludes the supply and the rack. | Exclusions vary and must be rewritten, not assumed from a new-unit sheet. |
Class AB and Class C are a related tradeoff, not a ranking. A Class AB stage is often discussed when the modulation needs linearity and a stated two-tone behavior. A Class C stage is often discussed when a constant-envelope service can accept a different efficiency and a different harmonic level. The buyer names the modulation. The supplier names the class on the datasheet. The desk does not pick one.
New versus refurbished remains open. New hardware may offer a clearer lifecycle and a datasheet that matches the unit. Refurbished hardware may cover a broadcast band that is no longer built, once condition and entitlement are verified. Original-maker versus compatible is also open. An original chassis may align with a station support policy. A compatible broadband module may widen the search when flatness, spurious output, and the host exciter are checked on that model.
Background: in February 2026 an EMC laboratory in Colorado asked for a broadband driver covering 1 MHz to 1 GHz at 10 W, quantity 1, bench use. Process: the desk required gain flatness at both ends, the connector on the existing generator, and a statement that the watt figure was continuous into 50 ohm. Result: a narrow 100 W VHF brick was removed from the set because its frequency range missed both ends of the lab span. The account is a buying scenario.
A reproducible check the buyer can request, without this desk claiming to have run it: terminate the output in a 50 ohm load rated above the wattage, insert a directional coupler and a power meter whose calibration traceability date is still valid, sweep the frequency range, and record gain, output power, and VSWR at the start, middle, and stop. Note the room as a bench environment and the attenuator pad value. Harmonics can be read on a spectrum analyzer at the rated power and written in dBc. The supplier repeats that method on the named model and attaches the row. Measurement accuracy is the meter specification, not a number this site invents.
Limits: a broadband label does not mean flat gain, an outdoor cabinet is out of scope until ingress protection is requested, and a 75 ohm plant is a different project. Title 47 CFR Part 2 Subpart J, read on 2026-10-27 as question context, does not authorize the module. ISO 9001 and NRTL files are attachments when the buyer asks for them. The inquiry lines and the brief form carry the span forward.
Paste the project use, the frequency range, the power basis, the connector, the destination, and the timing. There is no upload control. Unknown items stay marked unknown.
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