ricothetroll

Relay True Bypass for G1176, using the "GR" rotary switch.
« on: October 20, 2009, 09:58:00 AM »
Hi !

This is related to my previous topic :
http://www.groupdiy.com/index.php?topic=35391.0
I started a new topic because I tried to adapt it to the G1176 specifically related to the G1176, although the principle should be useable for any unit.

After those great advices, I redraw a schematic, that time for my G1176. I wanted to keep the bypass on the "GR" switch.



I found that magic formula (please do not laugh, I needed to take a look in "the art of electronics" to find it  :-[) : t=RC, so I calculated the values of R and C for t~500ms : R=56K and C=10u. So when I switch the unit on, the circuit has half a second to settle correctly.

I also added the protection diode.

What do you think about that schematic ? Do you think the rotary switch  (lorlin CK) can handle it ? Is the switch's wiring correct ?

Thanx in advance.

Eric


ricothetroll

Re: Relay True Bypass for G1176, using the "GR" rotary switch.
« Reply #1 on: October 26, 2009, 01:16:36 PM »
Hi,

I did a PCB for the stereo true bypass. It can be downloaded here :

http://insidecircus.free.fr/RelayTrueBypassV2Schematic.pdf
http://insidecircus.free.fr/RelayTrueBypassV2.pdf

I'm waiting now  for getting my components and then I'll test it. When this will be done and that I'll be sure it's working, I'll post the copper side.

Waiting for that, if anyone has opinions about it, that's always welcome !

The relays I use are those :
http://www.musikding.de/product_info.php/info/p1612_Finder-3022-12-2PDT-24V.html


 

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