Deepdark
Well-known member
Hi there
I'm looking at the vu meter for the Federal AM-864 and had a question about it. ON the schematic, the vu-meter is externally rectified at the output with a diode bride and a resistor, but the gain reduction side of the meter circuit isn't rectified. So my question is: what if I use a rectified vu-meter and don't put the external bride rectifier? I mean, to read the output, we already needed to rectified the ac signal, so having it internally rectified will not change anything, prior of putting the right resistor in serie (3K9??). Now, on the gain reduction side, if we don't pass through the bridge, this should means we are already in DC, isn't it? If a dc signal pass through a bridge rectifier, will it just pass through and just don't care about the bridge since it's already dc, or I'll mess with the signal?
Other option would be to ignor the output and simply read gain reduction. On the schematic there is no resistor in serie but I bet I'll have to tweak a couple of values to adjust the 0!?
My plan is to use one of Hairball's vu meter. My client has a limited budget and I don't have the luxury to get a 150$ Simpson vu meter.
Thanks folks
I'm looking at the vu meter for the Federal AM-864 and had a question about it. ON the schematic, the vu-meter is externally rectified at the output with a diode bride and a resistor, but the gain reduction side of the meter circuit isn't rectified. So my question is: what if I use a rectified vu-meter and don't put the external bride rectifier? I mean, to read the output, we already needed to rectified the ac signal, so having it internally rectified will not change anything, prior of putting the right resistor in serie (3K9??). Now, on the gain reduction side, if we don't pass through the bridge, this should means we are already in DC, isn't it? If a dc signal pass through a bridge rectifier, will it just pass through and just don't care about the bridge since it's already dc, or I'll mess with the signal?
Other option would be to ignor the output and simply read gain reduction. On the schematic there is no resistor in serie but I bet I'll have to tweak a couple of values to adjust the 0!?
My plan is to use one of Hairball's vu meter. My client has a limited budget and I don't have the luxury to get a 150$ Simpson vu meter.
Thanks folks
actually i planned replacing the choke and tube rec. With diodes rectifier and a RC filter.
