Hello everyone, I am making a preamp and want to use relays for switching the inputs. Do you all have recommendations for your favorite relays for low noise, high reliablity, etc.... ?? I would like a sealed relay that is DPDT to switch balanced inputs. Maybe the APOX people know more about this than anyone?
Based on what I am reading here, I am planning on grounding unused inputs, but it seems to be a bad thing if the source cannot handle it, any ideas here as well?
Based on what I am reading here, I am planning on grounding unused inputs, but it seems to be a bad thing if the source cannot handle it, any ideas here as well?
Igreen being a controls designer I use Omron and Finder relays with all my projects and they survive numerous switching operations in severe environments....I also use them in audio applications and havent had a failure yet....another approach is always the electonic way with simple logic gates and transistorswhich can be very reliable also
Cheers!!The DIRT®
Cheers!!The DIRT®
talking about relays, anybody some experience on this relay
OMRON G6S , its surface mounted, has a dual bifurcated crossbar contact ( dont know what that means
)
you can find it here
i got about 100 of them, and was wondering to use them in a preamp, but don't know if they or any good for that purpose.
Greetz Rudy
OMRON G6S , its surface mounted, has a dual bifurcated crossbar contact ( dont know what that means
)you can find it here
i got about 100 of them, and was wondering to use them in a preamp, but don't know if they or any good for that purpose.
Greetz Rudy
analog_sa said:
This could be avoided by using non active relay to carry signal and by keeping the rest of the relays active (Dynaudio does it in their expensive preamp). Madrigal in their reference preamp, ML 32, use NAIS relays, model TXS2-24V, ATXS204, if this helps. Also, I noticed that Pass Labs are using Nais relays.
Peter,
Not quite what you were looking for but ...
I compared two resistors soldered together like a fixed attenuator to the same but added a relay for switching to simulate essentially an Apox-SHM.
The comparison was done using an audio analyzer -- not the best unit available, but still ....
The voltage supplied to the relay was not particularly not well regulated.
There was NO difference.
This does not mean that there is no difference -- there must be a difference, but it is most likely very small. This was proof enough for me.
In theory, and providing you can keep wires short etc. manual switches should be better given there are no magnetic parts in the vicinity of the signal, and of course no magnetic coil fields from the relay in question, other relay.
Petter
Not quite what you were looking for but ...
I compared two resistors soldered together like a fixed attenuator to the same but added a relay for switching to simulate essentially an Apox-SHM.
The comparison was done using an audio analyzer -- not the best unit available, but still ....
The voltage supplied to the relay was not particularly not well regulated.
There was NO difference.
This does not mean that there is no difference -- there must be a difference, but it is most likely very small. This was proof enough for me.
In theory, and providing you can keep wires short etc. manual switches should be better given there are no magnetic parts in the vicinity of the signal, and of course no magnetic coil fields from the relay in question, other relay.
Petter
Petter
When i said ears i didn't mean analysers
I have compared soldered resistors (and TVC) to the best attenuators i have and greatly prefer the solder joint. Unfortunately long term use of a soldered, single position attenuator usually leads to my neighbours calling the cops.
Peter Daniel
Very good tip. Thanks. Any idea where to get NAIS relays?
cheers
peter
When i said ears i didn't mean analysers
I have compared soldered resistors (and TVC) to the best attenuators i have and greatly prefer the solder joint. Unfortunately long term use of a soldered, single position attenuator usually leads to my neighbours calling the cops.Peter Daniel
Very good tip. Thanks. Any idea where to get NAIS relays?
cheers
peter
analog_sa said:
Digi-Key http://dkc3.digikey.com/PDF/T032/0896.pdf
TXS seems to be SMD version, but when I look at the pics of ML preamp it seems like relays are through the hole types. TX series look similar. Probably the best would be contact NAIS directly and ask for more info.
I have a bunch of SDS/NAIS relays for sale, those good ones. They are only 1-pole. Check may fore sale page. The link to the datasheet is changed and goes now to a totally different type.
My advice to this is that many relay types are good. Omron, Schrack, NAIS, and many more. One condition is that they are of signal relay type. It seems though that NAIS has best performance but they are also most expensive.
and goes now to a totally different type.My advice to this is that many relay types are good. Omron, Schrack, NAIS, and many more. One condition is that they are of signal relay type. It seems though that NAIS has best performance but they are also most expensive.
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