How can I build Pad Attenuator with 3 steps?
- Thread starter digichild
- Start date
Help Support GroupDIY Audio Forum:
[quote author="digichild"]0 dB,-10 dB,-20dB
any schematics? the ones i found use switches 3x6 or 2x 12 which are too hard to get and they have more then these 3 steps -
thank you all[/quote]
4 steps would be also fine-switches are easy to get...
any schematics? the ones i found use switches 3x6 or 2x 12 which are too hard to get and they have more then these 3 steps -
thank you all[/quote]
4 steps would be also fine-switches are easy to get...
NewYorkDave
Well-known member
You didn't give enough information. Most importantly: what are your desired input and output impedances?
This site will tell you all you need to know to design your own.
http://www.uneeda-audio.com/pads/
This site will tell you all you need to know to design your own.
http://www.uneeda-audio.com/pads/
[quote author="NewYorkDave"]You didn't give enough information. Most importantly: what are your desired input and output impedances?
This site will tell you all you need to know to design your own.
http://www.uneeda-audio.com/pads/[/quote]
thanks for the link,which i studied already sometime ago,as i studied your suggestions for pads with 6 or 12 positions...
i would like to be as flexible as possible- i would like to use the pad for as many mics as possible in the input of an v672-was that clear enough?
This site will tell you all you need to know to design your own.
http://www.uneeda-audio.com/pads/[/quote]
thanks for the link,which i studied already sometime ago,as i studied your suggestions for pads with 6 or 12 positions...
i would like to be as flexible as possible- i would like to use the pad for as many mics as possible in the input of an v672-was that clear enough?
as many mics as possible on one channel? or just one channel. If its just one then follow the directions on the site, its not too too complex..
If you have questions I might be able to help
Are you trying to build a passive mic mixer to plug multiple mics into one channel?
also I think radioshack even has a 2X12 switch (i have no idea if germany has radioshacks, nor if that would be a good or a bad thing)
If you have questions I might be able to help
Are you trying to build a passive mic mixer to plug multiple mics into one channel?
also I think radioshack even has a 2X12 switch (i have no idea if germany has radioshacks, nor if that would be a good or a bad thing)
[quote author="WJS"]as many mics as possible on one channel? or just one channel. If its just one then follow the directions on the site, its not too too complex..
If you have questions I might be able to help
Are you trying to build a passive mic mixer to plug multiple mics into one channel?
also I think radioshack even has a 2X12 switch (i have no idea if germany has radioshacks, nor if that would be a good or a bad thing)[/quote]
of course i meant as many diff. mics as possible:with lower output voltage and with higher output voltage...sofar i have not found 2x12 swtiches for reasonable price in germany-but i would prefer a 3-4 switch anyway...thanks for your advice
If you have questions I might be able to help
Are you trying to build a passive mic mixer to plug multiple mics into one channel?
also I think radioshack even has a 2X12 switch (i have no idea if germany has radioshacks, nor if that would be a good or a bad thing)[/quote]
of course i meant as many diff. mics as possible:with lower output voltage and with higher output voltage...sofar i have not found 2x12 swtiches for reasonable price in germany-but i would prefer a 3-4 switch anyway...thanks for your advice
chriss
Well-known member
kiira
Well-known member
Do you need something like this?
This Russian guy is very easy to do business with I get caps from him alla time.
or here are some 2 deck 3 pos switches that are cheaptoo:
http://www.fairradio.com/sw233.htm
Sorry these are in the USA but still.... shipping is not all that expensive.
Kiira
"Be with Baba"
This Russian guy is very easy to do business with I get caps from him alla time.
or here are some 2 deck 3 pos switches that are cheaptoo:
http://www.fairradio.com/sw233.htm
Sorry these are in the USA but still.... shipping is not all that expensive.
Kiira
"Be with Baba"
[quote author="kiira"]Do you need something like this:
This Russian guy is very easy to do business with I get caps from him alla time.
or here are some 2 deck 3 pos switches that are cheaptoo:
http://www.fairradio.com/sw233.htm
Sorry these are in the USA but still.... shipping is not all that expensive.
Kiira
"Be with Baba"[/quote]
thank you-this is an interesting shop :grin:
This Russian guy is very easy to do business with I get caps from him alla time.
or here are some 2 deck 3 pos switches that are cheaptoo:
http://www.fairradio.com/sw233.htm
Sorry these are in the USA but still.... shipping is not all that expensive.
Kiira
"Be with Baba"[/quote]
thank you-this is an interesting shop :grin:
kiira
Well-known member
[quote author="digichild"]thank you-this is an interesting shop :grin:[/quote]
Yes it's pretty handy for some things. Another good one is www.apexjr.com.
I have a pair of V672s too. I'm just finsising up racking them but I didn't do anything special for pad... just the usual -20db 3 resisters on a dpdt switch. I think it would be nice to have something like 0 -10 -20 -30. You could do it with 4 deck switch to make a constant impedance ladder attenuator or a 2 deck switch and um er, a shunt resister. I would have to study it. But really, I don't think it would very hard.... the math for figuring the resisters for how much cut would be the hard part.
This page has info on making cheap shunt type attenuators.
Kiira
Yes it's pretty handy for some things. Another good one is www.apexjr.com.
I have a pair of V672s too. I'm just finsising up racking them but I didn't do anything special for pad... just the usual -20db 3 resisters on a dpdt switch. I think it would be nice to have something like 0 -10 -20 -30. You could do it with 4 deck switch to make a constant impedance ladder attenuator or a 2 deck switch and um er, a shunt resister. I would have to study it. But really, I don't think it would very hard.... the math for figuring the resisters for how much cut would be the hard part.
This page has info on making cheap shunt type attenuators.
Kiira
JLM Audio
Well-known member
Either of these will work just fine. Remember that the cheap Lorlin rotary switches come in 1 wafer 3 postion 4 pole for $2. So stereo of even the symetrical version could be built on one cheap switch. Or using there 1 wafer 6 positon 2 pole more PAD steps could be added etc. Resistor values will very slightly depending on if the input transformers secondary to heavy loaded or not.
Joe
www.jlmaudio.com
[quote author="JLM Audio"]
Either of these will work just fine. Remember that the cheap Lorlin rotary switches come in 1 wafer 3 postion 4 pole for $2. So stereo of even the symetrical version could be built on one cheap switch. Or using there 1 wafer 6 positon 2 pole more PAD steps could be added etc. Resistor values will very slightly depending on if the input transformers secondary to heavy loaded or not.
Joe
www.jlmaudio.com[/quote]
thank you so much-this helps a lot!
also your webside is very cool-i like the JLM Go Between & DI PCBs & Kits
Either of these will work just fine. Remember that the cheap Lorlin rotary switches come in 1 wafer 3 postion 4 pole for $2. So stereo of even the symetrical version could be built on one cheap switch. Or using there 1 wafer 6 positon 2 pole more PAD steps could be added etc. Resistor values will very slightly depending on if the input transformers secondary to heavy loaded or not.
Joe
www.jlmaudio.com[/quote]
thank you so much-this helps a lot!
also your webside is very cool-i like the JLM Go Between & DI PCBs & Kits
chriss
Well-known member
you could also use cheap switches and relais.
chris
chris
