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    Time Delay Relay on the VTA M-125

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    cci1492

    Posts : 69
    Join date : 2016-05-09
    Age : 56
    Location : Bergen County NJ

    Time Delay Relay on the VTA M-125

    Post by cci1492 on Sat Apr 08, 2017 10:51 am

    Has anyone here install the Time Delay Relay board on their M-125s ? Just curious, thanks!
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    Bob Latino
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    Join date : 2008-11-26
    Location : Massachusetts

    Re: Time Delay Relay on the VTA M-125

    Post by Bob Latino on Sat Apr 08, 2017 11:41 am

    cci1492 wrote:Has anyone here install the Time Delay Relay board on their M-125s ? Just curious, thanks!

    This can be done and it works fine .. The only minor issue is that there is no hole in the chassis to mount the board. The TDR would go into the area between V3, V4, V5 and the quad cap. To retrofit to an existing amp, you lay the board inside the amp and mark the mount hole and then drill the mount hole from the inside of the chassis. Assemble the board, mount the board and connect the appropriate wiring.

    That being said, if you use a tube rectifier (which warms up slowly) or the Weber WZ68 solid state rectifier (which has a short 3 to 5 second delay built in), you don't really need the TDR ..

    Bob
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    cci1492

    Posts : 69
    Join date : 2016-05-09
    Age : 56
    Location : Bergen County NJ

    Re: Time Delay Relay on the VTA M-125

    Post by cci1492 on Sat Apr 08, 2017 11:46 am

    As always, thank you Bob, enjoy the rest of your weekend!
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    j beede

    Posts : 382
    Join date : 2011-02-07
    Location : California

    Re: Time Delay Relay on the VTA M-125

    Post by j beede on Sat Apr 08, 2017 12:31 pm

    As an aside... the Mark VI has a time "advance" relay. It applies B+ to the outputs immediately but delays the delivery of B+ to the front end. This seems quite backward to me. As you might expect, you can hear noise through your speakers when the relay closes. Odd.

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