Hi,
somebody can tell me if this meter work with this build?
https://www.gyraf.dk/gy_pd/1176/1176.htm
Description:
Panel-VU-Meter with Frame
Part-Nr. : SD-740 -B
Dual-dB: -20~+3dB
with 12V Color=Amber Bulb lamp
with black plastic mounting frame
DC 500uA Full Scale, DCR=650Ω
(Item is only for a display meter, design the driver board by yourself, not included, please understand)
Thanks!
somebody can tell me if this meter work with this build?
https://www.gyraf.dk/gy_pd/1176/1176.htm
Description:
Panel-VU-Meter with Frame
Part-Nr. : SD-740 -B
Dual-dB: -20~+3dB
with 12V Color=Amber Bulb lamp
with black plastic mounting frame
DC 500uA Full Scale, DCR=650Ω
(Item is only for a display meter, design the driver board by yourself, not included, please understand)
Thanks!
Attachments
What you would need is the data for the original meter, like curent for full deflection and the internal resistance.
Then you know if the one you have fits or can be adapted by series or parallel resistors.
Do you have the compressor? Then you can just measure the voltage across the meter with say full deflection, and the current throught it, and Bob's your uncle.
Jan
Then you know if the one you have fits or can be adapted by series or parallel resistors.
Do you have the compressor? Then you can just measure the voltage across the meter with say full deflection, and the current throught it, and Bob's your uncle.
Jan
The original mount a Sifam AL29W
https://www.canford.co.uk/ProductResources/resources/S/Sifam/Sifam Presentor_AL_Meters_web 2021.pdf
But anyway, adaptaing some resistors I can use it no?
Most probably yes. I don't see the actual specs on the sheet you posted (it says 'Please refer to back page for full specification details' which I don't see).
But these are all similar and you normally adapt the dirve.
Do you have this compressor?
jan
But these are all similar and you normally adapt the dirve.
Do you have this compressor?
jan
https://www.hoytmeter.com/fileuploader/download/download/?d=0&file=custom/upload/File-1619015190.pdf
A low range AC voltmeter offering a performance close to that of a full specification
VU meter. Suitable for connecting across a 600Ω line and self contained except for
requiring an external 3k6 resistor. Calibrated for use with a 3k6 ohm resistor 4vu
above the scale marking so that the reference deflection (0vu) is produced by a signal
4vu above 1mW in 600Ω(1.228V).
The performance of the meter is based upon the requirements IEC 268-17.
Not yet. I'm collecting information and pieces. I'm planning to build a stereo version, and the Sifam are expensive...
Any legitimate "VU Meter" that meets the defined ANSI and IEC standards behaves the same, which was the entire point of the standard in the first place. That means any VU meter will work equally well in the circuit. It's more of a physical appearance and mounting issue.
In the original 1176 the meter had two purposes: output level and a Gain Reduction indicator. The G/R function didn't actually measure the real gain reduction, but instead simulated it by using an identical FET in a separate circuit that was hand-trimmed to track the gain reduction of the real audio gain control. It was a nice fake. There are lots of VU meters around, and any of the will work fine in that application.
The key elements to the standard meter are:
1. The scale (there were two, but the only difference is if the % scale is on the top or the dB scale is on the top). Even the buff color was part of the standard.
2. The meter electrical characteristics
3. The meter mechanical response time
Every real VU meter has to hit those parameters. I say "real" because there are a few that look like VU meters but don't behave like them, or have a modified scale, etc. So just stay with the real thing, the manufacturer and size is not important unless you're replicating the original 1176 exactly. Vintage meters are around, and a really good deal, usually.
If apperance isn't important you can always simulate the display with LEDs. I know...sacrilege...but cheap.
In the original 1176 the meter had two purposes: output level and a Gain Reduction indicator. The G/R function didn't actually measure the real gain reduction, but instead simulated it by using an identical FET in a separate circuit that was hand-trimmed to track the gain reduction of the real audio gain control. It was a nice fake. There are lots of VU meters around, and any of the will work fine in that application.
The key elements to the standard meter are:
1. The scale (there were two, but the only difference is if the % scale is on the top or the dB scale is on the top). Even the buff color was part of the standard.
2. The meter electrical characteristics
3. The meter mechanical response time
Every real VU meter has to hit those parameters. I say "real" because there are a few that look like VU meters but don't behave like them, or have a modified scale, etc. So just stay with the real thing, the manufacturer and size is not important unless you're replicating the original 1176 exactly. Vintage meters are around, and a really good deal, usually.
If apperance isn't important you can always simulate the display with LEDs. I know...sacrilege...but cheap.
Yes, I read somewere that a Led Vu Meter is more precisely.
I don't have any experience with vu meters so... What do you think? I would buy this cheap vu meter?
https://www.ebay.es/itm/403150759242?hash=item5ddda8654a:g:vUsAAOSwEjdhPFDG&amdata=enc:AQAHAAAA0JhSSkuokTy6NDkA9vG4afdFZGmucvb9sqixCkP+V+wDf55amLyqZXnyceyaORbWQVjxpg0FEk8KW5KHFBpzKjKET7FzxhpLyfmiz/oZKYSIvl8lCZ/zJ3Fo4g1wrH2EVhdHBhWLiibXIGw+uirt7v/ITxCghuMG7yJjQC8pPFWb8zQSydSbEu5XW+jkp2jTCEssUhGLFY0avJddZ0DkAkHWjg928CbRy0t3RDb//w5ZRYLEXU/PTz2K3x2BNVef1jWdegdwAG3xk+o49+4zhvc=|tkp:Bk9SR5SfqK2qYQ