Sencore PR570 - Upgrade & A Variac Tip Everyone Should See

[@JacksonAudio]

Purchased the hole punch and the AC plug just now! Thanks so much for your incredible videos! I've learned so much from you over the years!

[@MrDoneboy]

Cool Mark. You got it right next to your 2246 Tek on the bench!

[@Mac-t4y]

I would use the crimp connector with heat shrink activated adhesive seals for wire connection point instead of soldering.

[@marcseclecticstuff9497]

A good source for cheap snap-in sockets like that is outlet strips. Many of the long box type outlet strips use these types of sockets. These Sencore units have gotten stupid expensive. Wish I would have bought a bunch when they were going for a couple of hundred....

[@Rhine_Labs]

Great Idea, Just got a 2nd one that would be worthy of this mod.

[@andydelle4509]

Another note when using a chassis punch. The metal on the edge of the hole deforms slightly in the direction of the cutter part. In this example here, the cutter was pulled from inside the chassis to the outside, so there is a slight lip on the back. This may or may not be an issue but keep this in mind. To complicate this further, on a painted surface the cutter side is likely to chip paint around the hole. So again in this example pulling the cutter from the inside is less likely to chip the paint on the back panel. I must have punched thousands of holes with these punches in my 50 years of electronics. Both as a hobbyist and a professional..

[@MichaelLowe-g7y]

I was thinking about the use of this unit, and using an isolation transformer on the bench.... I know a usb connection defeats the isolation, but it occurred to me that using a signal generator does the same thing... So the scope is grounded to mains, and the DUT is isolated with an isolation transformer... Dummy load is isolated, BUT if you use a sig gen, doesn't that defeat the isolation? How do you use your sig gen with the isolation transformer on your bench Mark?

[@tracyenglish9998]

Good morning Mark :)

[@cajuncoinhunter]

Awesome mod , where did you get those good looking shelf bracket / feet from ??

[@cajuncoinhunter]

Never mind that , I saw your video on it , I'll try to find some , I used to own a cabinet shop , so putting a custom shelf unit is no big deal for me ...

[@MrMersh-ts7jl]

So are you just adding a mains plug on the rear? That's what I gathered from the power strip comment. You're tapping in between the mains and the variac?

[@MrMersh-ts7jl]

Never mind, I went back and watched the other variac video and saw that the outlet is controlled with the front dial. Nice work

[@Blueglow]

Yes, simple mod so that I can feed a power strip out the back of the unit on the bench and not use the front plug that wears out over time.

[@W3KW]

Wow. You got lucky. I paid $1100 for mine which looked like it was never out of the box. Alas, the seller claimed to be great at packing...not so much. One layer of cheap bubble wrap and zero protection from the plug and yup, the case was all messed up on delivery. Such a shame.

[@fullwaverecked]

Nice SenCORE! He he...

[@peteb2]

For the added rear outlet i'd have grabbed my stash of crimp spade terminals plus the crimp tool & put one on each lead then just a push-on at the outlet socket.... just saying.

[@Blueglow]

I'm not a fan of crimp anything, might let you down over time. But might not...

[@andydelle4509]

I know what you mean. anything over 5 amps of current, you are asking to trouble after a few years. I still use them but keep this in mind for high current applications. @@Blueglow

[@duanethompson2360]

If you know of anyone on the west coast looking for a lab, I’ve been trying to give mine away as I can no longer work. I live in La Grande Oregon. Full tube lab, tubes, amps etc. thanks Duane

[@cajuncoinhunter]

I sure could use a piece or 2 of what you have ....... HP RF signal generator 8656 or similar a variac etc...