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30-60 Second Relay ?

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Posted on November 22, 2020 at 16:21:41
Iain42
Reviewer

Posts: 895
Location: Arcansaw
Joined: February 10, 2004
 I finished this 1625 set amp not long ago and I just realized how lazy I am. There are two switches one for filaments and then b+. It is handy to warm the 816s but does anyone have a favorite 120vac 30-60sec relay??







High sensitivity, wide dynamic range, low distortion, and smooth frequency response. Pwk

http://www.itishifi.com

 

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RE: 30-60 Second Relay ? , posted on November 22, 2020 at 22:34:21
Eli Duttman
Audiophile

Posts: 10455
Location: Monroe Township, NJ
Joined: March 31, 2000
 Look here.


Eli D.

 

RE: 30-60 Second Relay ? , posted on November 23, 2020 at 04:05:04
PakProtector
Audiophile

Posts: 12363
Joined: May 14, 2002
 Yep, 115NO30, 115NO45 and 115NO60...they come in octal and 9-pin. I run them on my 6CB5A amps that have a pair of 866 each.
cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

 

RE: 30-60 Second Relay ? , posted on November 23, 2020 at 05:49:35
Iain42
Reviewer

Posts: 895
Location: Arcansaw
Joined: February 10, 2004
 Thank you will check it out.


High sensitivity, wide dynamic range, low distortion, and smooth frequency response. Pwk

http://www.itishifi.com

 

RE: 30-60 Second Relay ? , posted on November 23, 2020 at 05:50:37
Iain42
Reviewer

Posts: 895
Location: Arcansaw
Joined: February 10, 2004
 Thank you for the part numbers!!!!!


High sensitivity, wide dynamic range, low distortion, and smooth frequency response. Pwk

http://www.itishifi.com

 

RE: 30-60 Second Relay ? , posted on November 23, 2020 at 06:26:10
PakProtector
Audiophile

Posts: 12363
Joined: May 14, 2002
 There are many, those work on a 115V heater...there are of course ones that work from 6.3V heaters too, 6NO45 is of course the pn for a 6V heater, 45 sec delay, open-when-cold beastie( aka 'normally open, or NO ).

Just in case you want to run 'em from a heater winding. No change to the voltage and current the actual contacts are rated for though.

cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

 

RE: 30-60 Second Relay ? , posted on November 23, 2020 at 06:48:52
Iain42
Reviewer

Posts: 895
Location: Arcansaw
Joined: February 10, 2004
 I wanted it use it on the way to the b+. When I turn on the amp the mercury is warming up for a while then the b+ continues.



High sensitivity, wide dynamic range, low distortion, and smooth frequency response. Pwk

http://www.itishifi.com

 

RE: 30-60 Second Relay ? , posted on November 23, 2020 at 20:11:51
Eli Duttman
Audiophile

Posts: 10455
Location: Monroe Township, NJ
Joined: March 31, 2000
 The Amperite models with glass envelopes contain heating elements and who knows what's going on in the newer encapsulated models.

The heating elements have lengthy, but finite, lives. Pair an Amperite relay with a conventional electro-mechanical DPDT relay whose coil voltage is the same. Connect the Amperite's contacts to the conventional relay's coil. Wire 1 conventional pole's NC contact to the Amperite's coil and the NO contact of that pole to the conventional relay's coil. The 2nd conventional pole's NO contact feeds the load. When power is applied, the Amperite relay heats up and (eventually) its contacts close. The conventional relay closes, self latches, removes power from the Amperite's coil, and energizes the load. The arrangement maximizes Amperite service life and automatically prepares for the next cold cycle.


Eli D.

 

RE: 30-60 Second Relay ? , posted on November 24, 2020 at 03:14:29
PakProtector
Audiophile

Posts: 12363
Joined: May 14, 2002
 So somehow you are going to have to separate the HV from the filament Iron.

I have this with an old filament TX, and a HV-only winding B+ trans. The primary of that Iron is getting switched ON by the relay. The switch turns on the filament TX and the relay...when the thermal relay( the Amperite 6NO45 ) closes the HV tx feeds the 866's. That relay is heated by a 6.3V winding on the filament TX. That same tx feeds the 866's, the 6CB5A's and the two EL84 front end tubes.

The relay contacts are not rated for HV...so the primary of the plate TX is switched.
cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

 

RE: 30-60 Second Relay ? , posted on January 2, 2021 at 23:35:37
VoltSecond
Audiophile

Posts: 2523
Location: Arizona
Joined: October 14, 2000
 This may help. A simple place to put a solid state relay is in the ground connection on the HV output.

-Volt

Play safe and play longer! Don't be an "OUCH!" casualty.
Unplug it, discharge it and measure it (twice) before you touch it.

. . .Oh!. . .Remember: Modifying things voids their warranty.

 

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