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Baldwin Boxall BVCOM Compact routing mixer.
Not sure what this does, or how it works.
I am not able to test, so sold as seen.
2 knobs have been broken off.
Looks to have been damp at some point, some corrosion to presets inside.
Manual can be found by Googling the term Baldwin Boxall BVCOM. An exert from the manual is included at end of description.
Was purchased with 3 100V line PA amplifiers, but I had no use for this part.
Any questions, I will do my best.
UK postage to mainland excluding highlands and islands 7 by economy courier.
No international postage.
Collection welcome.
Exert from manual:
The BVCOM is a revolutionary four zone routeing mixer designed to replace conventional equipment up to sixtimes its size. The unit is designed to control the front-end of most voice alarm systems, however it can also beused for many public address applications.The Compact is sold either as a BVCOM, which includes no options and a BVCOMC, which includes twomessage cards, four chime cards and four remote volume controls. The options are available separately and arelisted below:OPT40264 Second EPROM based message cardup to 2 modules per BVCOMsee FIG 11OPT331, 2 or 3 note chime cardup to 4 modules per BVCOMsee FIG 12OPTEQBose equaliser card for use with models 8, 25, 32 & 102Fup to 4 modules per BVCOMsee FIG 13The MS2V is used for the remote volume control of the line level (music) input. Up to four MS2Vs can be usedper BVCOM to adjust the level for each zone. This operates on a two wire system between the MS2V andBVCOM.Each BVCOM has input facilities for two zonal emergency microphones, two zonal paging microphones andone line level music input. The standard priority configuration is :1.EMERGENCY MICROPHONE 12.EMERGENCY MICROPHONE 23.EPROM MESSAGE 14.EPROM MESSAGE 25.PAGING MICROPHONE 16.PAGING MICROPHONE 27.LINE INPUT (MUSIC)On the left of the front panel are the fault indicators for the fire microphones, messages, amplifier/line, datalink, power supply and processor. Should a fault develop on the system the relevant LED indicator willilluminate and a fault will be announced. There are three controls for the line level (music) input which arecommon for all zones. The tone controls are at 100Hz and 12kHz for bass and treble with a gain of 12dB. Allother inputs have a tone control of +12dB at 2k5Hz.Under normal – i.e. non-fault – conditions the green healthy indicator will illuminate, the fault relay will beenergised and the sounder will be silent. A fault is indicated by the flashing yellow common fault indicatortogether with the sounder sounding 1 second on, 1 second off. By pressing the fault accept button the faultindicator will illuminate continuously and its sounder will be silent. Operation of the accept button does notaffect the fault output produced by the relay contacts. The nature of the fault is indicated by a separate yellowindicator. All the fault indicators may be checked by pressing the lamp test button. If an indicator does notlight it will not light if and when there is a fault.On the right hand side of the unit is the aural monitor section. This is used to listen to each input individually.Either monitor through the internal loudspeaker or through headphones which are plugged into the headphonesocket. Press the select button to select the input to monitor. The input LEDs will light in-turn as the button ispressed. The monitor volume is adjusted with the preset potentiometer which is accessed through the holeabove the BGM LED.The internal fault surveillance system will announce a fault if there is absence of a satisfactory audio output level oran abnormal DC offset present at the output of the digital to analogue converter (DAC). This could be due to a faultyEPROM, DAC or other digital processing device.The internal fault surveillance system will also announce a fault if the audio surveillance signal is not present or anyof the zone access lines develop a short or open circuit condition.When Fire microphone 1 performs an All Call this by passes the microprocessor
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