Dear sirs:
If an anechoic chamber was for sound isolation, inside noise level should be below 20 decibels.
Is the same requirement mandatory or advisable for RF anechoic chambers?
What is the noise level usually recommended?
Thanks
schola
Dear sirs
Acoustic anechoic chambers require noise levels as low as 20- 10 db.
These noise levels have to be applied to Radio-frequency anechoic chambers also?
Tanks and regards
schola
Dear sirs:
I am Mechanical Engineer working in Air Conditioning project.
In order to conclude a preliminar cooling looad estimation, for a room containing a 100 KVA digital broadcasting transmissor, I need estimate how much heat that kind of equipment realease to the surrounding space.
Could...
Dear friends:
I´m estimating cooling load for 100 KW broadcast transmitter room.
Do you have any index I could use for estimate heat rejection from the transmitter?
Thanks,
schola
Dear friends:
SMACNA and terminal devices manufacturers literature I have consulted advise TL50/L and max. ADPI for Circular Ceiling Difussers.
Do you have such an information for Rectangular Ceiling Diffussers?.
Thanks in advance,
schola
Dear sirs:
Different Desing Dlta T are frecuently or advisable, as this case i have found:
Primary Delta T. 12.00 ºF, Secondary circuit: 10.00 ºF. ?
Regards,
schola
Dear sirs:
Do you know Noise levels and/or dbA of typical Horizontal Centrifugal Frame Mounted Chilled Water Pump. HP = 7.50 - 10.00 HP?
Thanks in advance.
schola
Dear sirs,
In accordance to NFPA-20, hose valves shall be installed for pump testing.
What could be the advisable time the pump test should last?
Regards,
schola
Dear friends:
Do you know where can I get information and detail about riser support decribed before?
The riser runs inside vertical masonry chase.
Thanks in advance,
schola
Dear sirs:
I use to specify ASTM A53 Gr. A or B for chilled water pipes 3" diameter or mayor.
What kind of problems could be arise is ASTM A-120 theraded pipe is used in lieu of A-53 carbon steel, diameters 3" to 6"? 8"?
Thanks,
schola
Dear sirs:
Do you know any standard or basic practice in order to specify spans for insulated cw copper pipe support?.
I am using Type L, diameters 1/2 to 2.1/2 inches.
Thanks,
schola
