Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: davidwpack on December 31, 2017, 10:07:59 am

Title: Switch
Post by: davidwpack on December 31, 2017, 10:07:59 am

Anyone ever tried pushbutton switches such as these for on/off, standby? The specs seem like they'd be fine for guitar amps. They look kinda cool. Just wondering. http://www.adafruit.com/product/916 (http://www.adafruit.com/product/916)

Title: Re: Switch
Post by: Auke Jolman on December 31, 2017, 11:02:48 am

Hi David,

I never tried them. Looking at the technical specifications, I would be hesitant to use them for DC-switching. The are only rated at 250 V DC @ 3 A.

Title: Re: Switch
Post by: davidwpack on December 31, 2017, 11:13:29 am

Yeah but unless I'm looking at the wrong data, the Carling switches I normally use are rated for 250 V @ 1A.

Title: Re: Switch
Post by: Auke Jolman on December 31, 2017, 11:41:18 am

I see that too.

Maybe some real experts chime in.

Title: Re: Switch
Post by: Colas LeGrippa on December 31, 2017, 02:56:25 pm

I never checked the data sheet before using a switch. I have plenty of switches in my drawers that I use for switching triode-pentode, standby, on/off
and so on, without looking at the specs......Perhaps i oughta do to do it. I guess a cheap switch won't tolerate 500V for a long period, bu at the same time, if the current is really low what harm could do such voltage to a switch ????


Colas Coca

Title: Re: Switch
Post by: Colas LeGrippa on December 31, 2017, 03:09:19 pm

250V seems a standard for switches. I think that if a switch is rated for 250V at 1 A , it could handle 1000V at 250 mA, 2000V at 125mA etc.
The power of all the above mentioned switches is 250W and I think this is how we gotta calculate it.

Title: Re: Switch
Post by: sluckey on December 31, 2017, 04:17:19 pm

Quote

I think that if a switch is rated for 250V at 1 A , it could handle 1000V at 250 mA, 2000V at 125mA etc.

No, no, no, no, no.