Transcript
Vendor Questions: Request for Bid # EC130518 PORTABLE EMERGENCY TRANSMITTER SYSTEMS:
Vendor Question: Regarding this RFB, paragraph 5.1.3 states a requirement of 2kW continuous operation. Paragraph 5.1.8 specifies operation with 120V and 240V AC power. My concern is that operation at 2kW and 120VAC will exceed NEC limits for 120V circuits of 20A, unless transmitter overall efficiency (AC to RF) is higher than 80%. At this point, of the six different transmitter models I've examined, this highest efficiency claimed has been 75% overall - thus the transmitter would be in violation of NEC if provided with a 120V AC connection. Will consideration be given to offerings that only accept 240VAC, in order to maintain compliance with NEC? State Response: ECB understands that in order to accommodate the 2,000 Watt level a 120 VAC 20 Amp circuit is insufficient. ECB understands that either a 30 Amp circuit is required, or it will be necessary to run the transmitter at a lower than 2,000 Watt output level if a 20 Amp 120 VAC circuit is utilized.
Vendor Question: We notice under 5.0 SPRCIFICATIONS AND REQUIRMENTS, statement indicating: FAILURE TO MEET A MANDATORY REQUIREMENT WILL DISQUALIFY THE BID. 5.1.7 The transmitters shall be designed for standard 19” wide rack mounting, and require no more than 3 Rack Units when so installed. ______ 2kW FM transmitter is 4 Rack Units. Will the 3 rack Unit specification indicated disqualify _____ from bidding since ours is 4 Rack Units?
State Response: 4 Rack Units will be acceptable.
Vendor Question: 5.1.8
The transmitters shall be designed for operation with 120V and 240V AC power.
5.1.9
Each transmitter shall be supplied with two 10’ AC connection cables with suitable connectors at each end, one to be wired for connection to a 120 V outlet and the second cable wired to permit connection to a 240 V standard outlet.
Does State of Wisconsin actually needs 120v source? If so, would a step-down transformer from 240v to 120v be acceptable?
State Response: The inclusion of a step down transformer is acceptable.
Vendor Question: 5.1.1 band.
The antenna shall be and be field tunable within the educational portion of the US FM broadcast
5.1.2 The antenna shall have a fine tuning or VSWR matching adjustment to permit matching the output of the transmitter to the antenna. Would State of Wisconsin accept a broadband antenna for 87.5 - 108 MHz and less than 1.3 VSWR, but is not field tunable? State Response: ECB does not desire to deviate from the published specifications for the antennas.
