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Registered Member #9879
Joined: Tue Jan 29 2013, 05:00AM
Location: New Zealand
Posts: 37
nzoomed wrote ...
orac12 wrote ...
Well I haven't blown anything up with out them, but I'll install them and hopefully reduce some of my switching spikes.
You should get more effective switching with them, and may help to resolve your issues with your coils output possibly.
Have had the coil up and running decently and making 2 meter streamers so far at a reduced bus voltage. Primary to secondary flash overs are stopping me from turning it up any further at the moment.
Registered Member #54503
Joined: Sun Feb 22 2015, 10:35PM
Location: New Zealand
Posts: 288
orac12 wrote ...
nzoomed wrote ...
orac12 wrote ...
Well I haven't blown anything up with out them, but I'll install them and hopefully reduce some of my switching spikes.
You should get more effective switching with them, and may help to resolve your issues with your coils output possibly.
Have had the coil up and running decently and making 2 meter streamers so far at a reduced bus voltage. Primary to secondary flash overs are stopping me from turning it up any further at the moment.
Thats great news!
If you are still having flashover issues, i would try raising the coil as you mention and perhaps put some acrylic sheet over the primary.
Registered Member #54503
Joined: Sun Feb 22 2015, 10:35PM
Location: New Zealand
Posts: 288
Im still having trouble finding suitable TVS diodes for 24V gate operation. The closest ive got are P6KE22CA, these have a breakdown voltage start at 24.4v and the maximum clamping voltage is 35V. I really need them to clamp at around 26 or 27V ideally, but all the TVS i see have a far lower breakdown voltage, that means it will breakdown well under 24V.
Im still having trouble finding suitable TVS diodes for 24V gate operation. The closest ive got are P6KE22CA, these have a breakdown voltage start at 24.4v and the maximum clamping voltage is 35V. I really need them to clamp at around 26 or 27V ideally, but all the TVS i see have a far lower breakdown voltage, that means it will breakdown well under 24V.
Those are fine. Just lower your 24V input to the UD2 to 22V.
Registered Member #9879
Joined: Tue Jan 29 2013, 05:00AM
Location: New Zealand
Posts: 37
nzoomed wrote ...
Im still having trouble finding suitable TVS diodes for 24V gate operation. The closest ive got are P6KE22CA, these have a breakdown voltage start at 24.4v and the maximum clamping voltage is 35V. I really need them to clamp at around 26 or 27V ideally, but all the TVS i see have a far lower breakdown voltage, that means it will breakdown well under 24V.
I used some 1N5361 back to back, which is around 27V.
Registered Member #54503
Joined: Sun Feb 22 2015, 10:35PM
Location: New Zealand
Posts: 288
loneoceans wrote ...
nzoomed wrote ...
Im still having trouble finding suitable TVS diodes for 24V gate operation. The closest ive got are P6KE22CA, these have a breakdown voltage start at 24.4v and the maximum clamping voltage is 35V. I really need them to clamp at around 26 or 27V ideally, but all the TVS i see have a far lower breakdown voltage, that means it will breakdown well under 24V.
Those are fine. Just lower your 24V input to the UD2 to 22V.
I cant easily do that as im using a transformer, i could rectify it and use a voltage regulator i guess to feed 22VDC into the DC input.
Registered Member #46164
Joined: Wed May 07 2014, 08:16AM
Location: California, USA
Posts: 89
nzoomed wrote ...
loneoceans wrote ...
nzoomed wrote ...
Im still having trouble finding suitable TVS diodes for 24V gate operation. The closest ive got are P6KE22CA, these have a breakdown voltage start at 24.4v and the maximum clamping voltage is 35V. I really need them to clamp at around 26 or 27V ideally, but all the TVS i see have a far lower breakdown voltage, that means it will breakdown well under 24V.
Those are fine. Just lower your 24V input to the UD2 to 22V.
I cant easily do that as im using a transformer, i could rectify it and use a voltage regulator i guess to feed 22VDC into the DC input.
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Building my first DRSSTC - Updated thread...
