Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Ambugaton on August 12, 2016, 10:12:37 pm

Title: Diode spacing??
Post by: Ambugaton on August 12, 2016, 10:12:37 pm

Are there any general rules for diode spacing for a SS rectifier? My space is a little tight and the leads for some of the diodes will be about 9/32" apart. Is that safe?

Title: Re: Diode spacing??
Post by: PRR on August 12, 2016, 10:15:51 pm

> about 9/32" apart

1/4"? Seems generous to me.

Title: Re: Diode spacing??
Post by: sluckey on August 12, 2016, 10:22:20 pm

9/32" is fine for 1N4007 or other DO-41 case style diodes.

Title: Re: Diode spacing??
Post by: Ambugaton on August 12, 2016, 11:25:28 pm

Thanks. I'm completely ignorant to all of this and didn't know if there was a risk of arcing if they were too close.

Title: Re: Diode spacing??
Post by: kagliostro on August 13, 2016, 02:22:32 am

The arching risk depends on the voltage

if you use 1000v or higher B+ then you must pay particoular attention as to avoid risks

a bit less if B+ is in orther of 800v and so on

May be here you can read something of interesting also if dedicated to PCB traces and SS components

http://www.smps.us/pcbtracespacing.html (http://www.smps.us/pcbtracespacing.html)

http://pcbdesign.smps.us/creepage.html (http://pcbdesign.smps.us/creepage.html)

http://www.infineon.com/dgdl/Infineon+-+Application+Note+-+PowerMOSFETs+-+CoolMOS™+-+Electrical+Safety+and+Isolation+in+high+voltage+Applications.pdf?fileId=db3a30433d1d0bbe013d20e0cbf017fe (http://www.infineon.com/dgdl/Infineon+-+Application+Note+-+PowerMOSFETs+-+CoolMOS™+-+Electrical+Safety+and+Isolation+in+high+voltage+Applications.pdf?fileId=db3a30433d1d0bbe013d20e0cbf017fe)

Franco